diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 3e11d4a58..0e2c636d4 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -1,7 +1,7 @@
 <component name="InspectionProjectProfileManager">
   <profile version="1.0">
     <option name="myName" value="Project Default" />
-    <inspection_tool class="AndroidLintNewerVersionAvailable" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="AndroidLintUnsafeImplicitIntentLaunch" enabled="false" level="ERROR" enabled_by_default="false" />
     <inspection_tool class="ComposePreviewDimensionRespectsLimit" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="composableFile" value="true" />
       <option name="previewFile" value="true" />
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/common/FavoritesVM.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/common/FavoritesVM.kt
index 6dc460579..c0db6a3f2 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/common/FavoritesVM.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/common/FavoritesVM.kt
@@ -51,14 +51,14 @@ abstract class FavoritesVM : ViewModel(), KoinComponent {
                 val frequentlyUsedRows = it.second.frequentlyUsedRows
 
                 val pinned = favoritesService.getFavorites(
-                    excludeTypes = if (excludeCalendar) listOf("calendar", "tag") else listOf("tag"),
+                    excludeTypes = if (excludeCalendar) listOf("calendar", "tag", "plugin.calendar") else listOf("tag"),
                     minPinnedLevel = PinnedLevel.AutomaticallySorted,
                     limit = 10 * columns,
                 )
                 if (includeFrequentlyUsed) {
                     emitAll(pinned.flatMapLatest { pinned ->
                         favoritesService.getFavorites(
-                            excludeTypes = if (excludeCalendar) listOf("calendar", "tag") else listOf("tag"),
+                            excludeTypes = if (excludeCalendar) listOf("calendar", "tag", "plugin.calendar") else listOf("tag"),
                             maxPinnedLevel = PinnedLevel.FrequentlyUsed,
                             minPinnedLevel = PinnedLevel.FrequentlyUsed,
                             limit = frequentlyUsedRows * columns - pinned.size % columns,
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/SearchVM.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/SearchVM.kt
index cf8d14011..75ff85396 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/SearchVM.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/SearchVM.kt
@@ -409,15 +409,15 @@ class SearchVM : ViewModel(), KoinComponent {
 
     val missingCalendarPermission = combine(
         permissionsManager.hasPermission(PermissionGroup.Calendar),
-        calendarSearchSettings.enabled,
-    ) { perm, enabled -> !perm && enabled }
+        calendarSearchSettings.providers,
+    ) { perm, providers -> !perm && providers.contains("local") }
 
     fun requestCalendarPermission(context: AppCompatActivity) {
         permissionsManager.requestPermission(context, PermissionGroup.Calendar)
     }
 
     fun disableCalendarSearch() {
-        calendarSearchSettings.setEnabled(false)
+        calendarSearchSettings.setProviderEnabled("local", false)
     }
 
     val missingContactsPermission = combine(
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/calendar/CalendarItem.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/calendar/CalendarItem.kt
index 1bab01852..39e58f9f4 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/calendar/CalendarItem.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/search/calendar/CalendarItem.kt
@@ -8,10 +8,10 @@ import androidx.compose.animation.SharedTransitionLayout
 import androidx.compose.animation.core.MutableTransitionState
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.expandIn
+import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkOut
-import androidx.compose.foundation.background
+import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -19,21 +19,19 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.rounded.ArrowBack
-import androidx.compose.material.icons.rounded.Edit
+import androidx.compose.material.icons.rounded.CheckCircle
+import androidx.compose.material.icons.rounded.Circle
 import androidx.compose.material.icons.rounded.Notes
 import androidx.compose.material.icons.rounded.OpenInNew
 import androidx.compose.material.icons.rounded.People
 import androidx.compose.material.icons.rounded.Place
+import androidx.compose.material.icons.rounded.RadioButtonUnchecked
 import androidx.compose.material.icons.rounded.Schedule
 import androidx.compose.material.icons.rounded.Star
 import androidx.compose.material.icons.rounded.StarOutline
 import androidx.compose.material.icons.rounded.Tune
-import androidx.compose.material.icons.rounded.Visibility
-import androidx.compose.material.icons.rounded.VisibilityOff
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.SnackbarDuration
-import androidx.compose.material3.SnackbarResult
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
@@ -49,8 +47,6 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.roundToIntRect
-import androidx.lifecycle.compose.LocalLifecycleOwner
-import androidx.lifecycle.lifecycleScope
 import de.mm20.launcher2.search.CalendarEvent
 import de.mm20.launcher2.ui.R
 import de.mm20.launcher2.ui.component.DefaultToolbarAction
@@ -63,8 +59,6 @@ import de.mm20.launcher2.ui.launcher.sheets.LocalBottomSheetManager
 import de.mm20.launcher2.ui.locals.LocalDarkTheme
 import de.mm20.launcher2.ui.locals.LocalFavoritesEnabled
 import de.mm20.launcher2.ui.locals.LocalGridSettings
-import de.mm20.launcher2.ui.locals.LocalSnackbarHostState
-import kotlinx.coroutines.launch
 import palettes.TonalPalette
 
 @Composable
@@ -99,33 +93,53 @@ fun CalendarItem(
                 Column {
                     Row(
                         verticalAlignment = Alignment.CenterVertically,
-                        modifier = Modifier.padding(vertical = 16.dp)
                     ) {
-                        Box(
+                        Icon(
+                            when (calendar.isCompleted) {
+                                true -> Icons.Rounded.CheckCircle
+                                false -> Icons.Rounded.RadioButtonUnchecked
+                                null -> Icons.Rounded.Circle
+                            },
+                            null,
                             modifier = Modifier
-                                .padding(horizontal = 14.dp)
+                                .padding(horizontal = 14.dp, vertical = 20.dp)
                                 .size(24.dp)
-                                .sharedBounds(
+                                .sharedElement(
                                     rememberSharedContentState("color"),
                                     this@AnimatedContent
-                                )
-                                .background(eventColor, MaterialTheme.shapes.extraSmall)
+                                ),
+                            tint = eventColor
                         )
-
-                        Text(
+                        Column(
                             modifier = Modifier
                                 .padding(start = 4.dp, end = 16.dp)
-                                .sharedBounds(
-                                    rememberSharedContentState("label"),
-                                    this@AnimatedContent
-                                ),
-                            text = calendar.labelOverride ?: calendar.label,
-                            style = MaterialTheme.typography.titleMedium
-                        )
+                        ) {
+                            Text(
+                                modifier = Modifier
+                                    .sharedBounds(
+                                        rememberSharedContentState("label"),
+                                        this@AnimatedContent
+                                    ),
+                                text = calendar.labelOverride ?: calendar.label,
+                                style = MaterialTheme.typography.titleMedium
+                            )
+                            if (calendar.calendarName != null) {
+                                Text(
+                                    modifier = Modifier.animateEnterExit(
+                                        enter = expandVertically(),
+                                        exit = shrinkVertically()
+                                    ),
+                                    text = calendar.calendarName!!,
+                                    style = MaterialTheme.typography.labelSmall,
+                                    color = eventColor,
+                                )
+                            }
+                        }
                     }
                     Row(
                         Modifier
-                            .fillMaxWidth().padding(bottom = 8.dp, end = 16.dp),
+                            .fillMaxWidth()
+                            .padding(bottom = 8.dp, end = 16.dp),
                         verticalAlignment = Alignment.CenterVertically
                     ) {
                         Icon(
@@ -146,7 +160,8 @@ fun CalendarItem(
                     if (!calendar.description.isNullOrBlank()) {
                         Row(
                             Modifier
-                                .fillMaxWidth().padding(bottom = 8.dp, end = 16.dp),
+                                .fillMaxWidth()
+                                .padding(bottom = 8.dp, end = 16.dp),
                             verticalAlignment = Alignment.CenterVertically
                         ) {
                             Icon(
@@ -165,7 +180,8 @@ fun CalendarItem(
                     if (calendar.attendees.isNotEmpty()) {
                         Row(
                             Modifier
-                                .fillMaxWidth().padding(bottom = 8.dp, end = 16.dp),
+                                .fillMaxWidth()
+                                .padding(bottom = 8.dp, end = 16.dp),
                             verticalAlignment = Alignment.CenterVertically
                         ) {
                             Icon(
@@ -261,15 +277,21 @@ fun CalendarItem(
                     modifier = modifier
                         .padding(16.dp)
                 ) {
-                    Box(
+                    Icon(
+                        when (calendar.isCompleted) {
+                            true -> Icons.Rounded.CheckCircle
+                            false -> Icons.Rounded.RadioButtonUnchecked
+                            null -> Icons.Rounded.Circle
+                        },
+                        null,
                         modifier = Modifier
                             .padding(end = 16.dp)
                             .size(20.dp)
-                            .sharedBounds(
+                            .sharedElement(
                                 rememberSharedContentState("color"),
                                 this@AnimatedContent
-                            )
-                            .background(eventColor, MaterialTheme.shapes.extraSmall)
+                            ),
+                        tint = eventColor
                     )
                     Column {
                         Text(
@@ -281,13 +303,16 @@ fun CalendarItem(
                             style = MaterialTheme.typography.titleSmall
                         )
                         Text(
-                            modifier = Modifier.padding(top = 2.dp)
+                            modifier = Modifier
+                                .padding(top = 2.dp)
                                 .sharedBounds(
                                     rememberSharedContentState("date"),
                                     this@AnimatedContent
                                 ),
                             text = calendar.getSummary(context),
-                            style = MaterialTheme.typography.bodySmall
+                            style = MaterialTheme.typography.bodySmall,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
                         )
                     }
 
@@ -327,6 +352,24 @@ fun CalendarItemGridPopup(
 }
 
 private fun CalendarEvent.formatTime(context: Context): String {
+    val startTime = startTime
+    if (startTime == null) {
+        if (allDay) {
+            return DateUtils.formatDateRange(
+                context,
+                endTime,
+                endTime,
+                DateUtils.FORMAT_SHOW_DATE
+            )
+        }
+        return DateUtils.formatDateRange(
+            context,
+            endTime,
+            endTime,
+            DateUtils.FORMAT_SHOW_DATE or DateUtils.FORMAT_SHOW_TIME
+        )
+    }
+
     if (allDay) return DateUtils.formatDateRange(
         context,
         startTime,
@@ -343,6 +386,39 @@ private fun CalendarEvent.formatTime(context: Context): String {
 }
 
 private fun CalendarEvent.getSummary(context: Context): String {
+    val startTime = startTime
+    if (startTime == null) {
+        val isToday = DateUtils.isToday(endTime)
+        if (isToday) {
+            if (allDay) {
+                return "Due today"
+            }
+            return "Due ${
+                DateUtils.formatDateTime(
+                    context,
+                    endTime,
+                    DateUtils.FORMAT_SHOW_TIME
+                )
+            }"
+        }
+        if (allDay) {
+            return "Due ${
+                DateUtils.formatDateTime(
+                    context,
+                    endTime,
+                    DateUtils.FORMAT_SHOW_DATE
+                )
+            }"
+        }
+        return "Due ${
+            DateUtils.formatDateTime(
+                context,
+                endTime,
+                DateUtils.FORMAT_SHOW_DATE or DateUtils.FORMAT_SHOW_TIME
+            )
+        }"
+    }
+
     val isToday =
         DateUtils.isToday(startTime) && DateUtils.isToday(endTime)
     return if (isToday) {
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/sheets/ConfigureWidgetSheet.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/sheets/ConfigureWidgetSheet.kt
index ff2c4c5a0..755238da7 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/sheets/ConfigureWidgetSheet.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/sheets/ConfigureWidgetSheet.kt
@@ -34,7 +34,6 @@ import androidx.compose.material.icons.rounded.Link
 import androidx.compose.material.icons.rounded.LinkOff
 import androidx.compose.material.icons.rounded.OpenInNew
 import androidx.compose.material3.ButtonDefaults
-import androidx.compose.material3.Divider
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
@@ -64,7 +63,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.isUnspecified
 import androidx.core.net.toUri
 import de.mm20.launcher2.calendar.CalendarRepository
-import de.mm20.launcher2.calendar.UserCalendar
+import de.mm20.launcher2.calendar.providers.CalendarList
 import de.mm20.launcher2.crashreporter.CrashReporter
 import de.mm20.launcher2.ktx.isAtLeastApiLevel
 import de.mm20.launcher2.permissions.PermissionGroup
@@ -75,7 +74,6 @@ import de.mm20.launcher2.ui.component.BottomSheetDialog
 import de.mm20.launcher2.ui.component.DragResizeHandle
 import de.mm20.launcher2.ui.component.LargeMessage
 import de.mm20.launcher2.ui.component.MissingPermissionBanner
-import de.mm20.launcher2.ui.component.ResizeAxis
 import de.mm20.launcher2.ui.component.preferences.CheckboxPreference
 import de.mm20.launcher2.ui.component.preferences.Preference
 import de.mm20.launcher2.ui.component.preferences.SwitchPreference
@@ -91,6 +89,7 @@ import de.mm20.launcher2.widgets.MusicWidget
 import de.mm20.launcher2.widgets.NotesWidget
 import de.mm20.launcher2.widgets.WeatherWidget
 import de.mm20.launcher2.widgets.Widget
+import kotlinx.coroutines.flow.map
 import org.koin.androidx.compose.get
 import java.time.ZonedDateTime
 import java.time.format.DateTimeFormatter
@@ -504,18 +503,16 @@ fun ColumnScope.ConfigureCalendarWidget(
 ) {
     val calendarRepository: CalendarRepository = get()
     val permissionsManager: PermissionsManager = get()
-    var calendars by remember { mutableStateOf(emptyList<UserCalendar>()) }
-    var ready by remember { mutableStateOf(false) }
+    val calendars by remember {
+        calendarRepository.getCalendars().map {
+            it.sortedBy { it.name }
+        }
+    }.collectAsState(null)
 
     val hasPermission by remember {
         permissionsManager.hasPermission(PermissionGroup.Calendar)
     }.collectAsState(true)
 
-    LaunchedEffect(hasPermission) {
-        calendars = calendarRepository.getCalendars().sortedBy { it.name }
-        ready = true
-    }
-
     OutlinedCard {
         Column(
             modifier = Modifier.fillMaxWidth()
@@ -537,26 +534,29 @@ fun ColumnScope.ConfigureCalendarWidget(
         text = stringResource(R.string.preference_calendar_calendars)
     )
     val context = LocalLifecycleOwner.current as AppCompatActivity
-    if (calendars.isNotEmpty()) {
+    val excludedCalendars = remember(widget.config) {
+        widget.config.excludedCalendarIds ?: widget.config.legacyExcludedCalendarIds?.map { "local:$it" } ?: emptyList()
+    }
+    if (calendars?.isNotEmpty() == true) {
         OutlinedCard {
             Column(
                 modifier = Modifier.fillMaxWidth()
             ) {
-                for ((i, calendar) in calendars.withIndex()) {
-                    if (i > 0) Divider()
+                for ((i, calendar) in calendars!!.withIndex()) {
+                    if (i > 0) HorizontalDivider()
                     CheckboxPreference(
                         title = calendar.name,
                         summary = calendar.owner,
                         iconPadding = false,
-                        value = !widget.config.excludedCalendarIds.contains(calendar.id),
+                        value = excludedCalendars.contains(calendar.id) != true,
                         onValueChanged = {
                             onWidgetUpdated(
                                 widget.copy(
                                     config = widget.config.copy(
                                         excludedCalendarIds = if (it) {
-                                            widget.config.excludedCalendarIds - calendar.id
+                                            excludedCalendars - calendar.id
                                         } else {
-                                            widget.config.excludedCalendarIds + calendar.id
+                                            excludedCalendars + calendar.id
                                         }
                                     )
                                 )
@@ -572,7 +572,7 @@ fun ColumnScope.ConfigureCalendarWidget(
             text = stringResource(R.string.missing_permission_calendar_widget_settings),
             onClick = { permissionsManager.requestPermission(context, PermissionGroup.Calendar) },
         )
-    } else if (ready) {
+    } else if (calendars != null) {
         Text(
             modifier = Modifier.padding(top = 8.dp, bottom = 16.dp),
             style = MaterialTheme.typography.bodySmall,
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/calendar/CalendarWidgetVM.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/calendar/CalendarWidgetVM.kt
index 08e42b59b..7fd3a992b 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/calendar/CalendarWidgetVM.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/launcher/widgets/calendar/CalendarWidgetVM.kt
@@ -43,7 +43,7 @@ class CalendarWidgetVM : ViewModel(), KoinComponent {
     val calendarEvents = mutableStateOf<List<CalendarEvent>>(emptyList())
     val pinnedCalendarEvents =
         favoritesService.getFavorites(
-            includeTypes = listOf("calendar"),
+            includeTypes = listOf("calendar", "plugin.calendar"),
             minPinnedLevel = PinnedLevel.AutomaticallySorted,
         ).stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())
     val nextEvents = mutableStateOf<List<CalendarEvent>>(emptyList())
@@ -67,10 +67,10 @@ class CalendarWidgetVM : ViewModel(), KoinComponent {
             field = value
             val dates = value.flatMap {
                 val startDate =
-                    Instant.ofEpochMilli(it.startTime).atZone(ZoneId.systemDefault()).toLocalDate()
+                    it.startTime?.let { Instant.ofEpochMilli(it).atZone(ZoneId.systemDefault()).toLocalDate() }
                 val endDate =
                     Instant.ofEpochMilli(it.endTime).atZone(ZoneId.systemDefault()).toLocalDate()
-                return@flatMap listOf(
+                return@flatMap listOfNotNull(
                     startDate,
                     endDate
                 )
@@ -136,14 +136,14 @@ class CalendarWidgetVM : ViewModel(), KoinComponent {
         val dayStart = max(now, date.atStartOfDay().toEpochSecond(offset) * 1000)
         val dayEnd = date.plusDays(1).atStartOfDay().toEpochSecond(offset) * 1000
         var events = upcomingEvents.filter {
-            it.endTime >= dayStart && it.startTime < dayEnd
+            it.endTime >= dayStart && (it.startTime ?: it.endTime) < dayEnd
         }
 
         if (!showRunningPastDayEvents) {
             val totalCount = events.size
 
             events = events.filter {
-                it.startTime >= date.atStartOfDay().toEpochSecond(offset) * 1000 ||
+                (it.startTime != null && it.startTime!! >= date.atStartOfDay().toEpochSecond(offset) * 1000) ||
                         it.endTime < date.atStartOfDay().plusDays(1).toEpochSecond(offset) * 1000
             }
 
@@ -169,14 +169,14 @@ class CalendarWidgetVM : ViewModel(), KoinComponent {
                 from = System.currentTimeMillis(),
                 to = System.currentTimeMillis() + 14 * 24 * 60 * 60 * 1000L,
                 excludeAllDayEvents = !config.allDayEvents,
-                excludeCalendars = config.excludedCalendarIds,
+                excludeCalendars = config.excludedCalendarIds ?: config.legacyExcludedCalendarIds?.map { "local:$it" } ?: emptyList(),
             ).collectLatest { events ->
                 searchableRepository.getKeys(
-                    includeTypes = listOf("calendar"),
+                    includeTypes = listOf("calendar", "plugin.calendar"),
                     maxVisibility = VisibilityLevel.SearchOnly,
                     limit = 9999,
                 ).collectLatest { hidden ->
-                    upcomingEvents = events.filter { !hidden.contains(it.key) }
+                    upcomingEvents = events.filter { !hidden.contains(it.key) }.sortedBy { it.startTime ?: it.endTime }
                 }
             }
 
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/SettingsActivity.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/SettingsActivity.kt
index 4812cea05..79c306300 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/SettingsActivity.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/SettingsActivity.kt
@@ -36,6 +36,7 @@ import de.mm20.launcher2.ui.settings.about.AboutSettingsScreen
 import de.mm20.launcher2.ui.settings.appearance.AppearanceSettingsScreen
 import de.mm20.launcher2.ui.settings.backup.BackupSettingsScreen
 import de.mm20.launcher2.ui.settings.buildinfo.BuildInfoSettingsScreen
+import de.mm20.launcher2.ui.settings.calendarsearch.CalendarSearchSettingsScreen
 import de.mm20.launcher2.ui.settings.cards.CardsSettingsScreen
 import de.mm20.launcher2.ui.settings.colorscheme.ThemeSettingsScreen
 import de.mm20.launcher2.ui.settings.colorscheme.ThemesSettingsScreen
@@ -180,6 +181,9 @@ class SettingsActivity : BaseActivity() {
                                 composable("settings/search/files") {
                                     FileSearchSettingsScreen()
                                 }
+                                composable("settings/search/calendar") {
+                                    CalendarSearchSettingsScreen()
+                                }
                                 composable("settings/search/searchactions") {
                                     SearchActionsSettingsScreen()
                                 }
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreen.kt
new file mode 100644
index 000000000..246f92c84
--- /dev/null
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreen.kt
@@ -0,0 +1,91 @@
+package de.mm20.launcher2.ui.settings.calendarsearch
+
+import android.app.PendingIntent
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.ErrorOutline
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import de.mm20.launcher2.crashreporter.CrashReporter
+import de.mm20.launcher2.ktx.sendWithBackgroundPermission
+import de.mm20.launcher2.plugin.PluginState
+import de.mm20.launcher2.ui.R
+import de.mm20.launcher2.ui.component.Banner
+import de.mm20.launcher2.ui.component.MissingPermissionBanner
+import de.mm20.launcher2.ui.component.preferences.PreferenceScreen
+import de.mm20.launcher2.ui.component.preferences.SwitchPreference
+
+@Composable
+fun CalendarSearchSettingsScreen() {
+    val viewModel: CalendarSearchSettingsScreenVM = viewModel()
+    val context = LocalContext.current
+
+    val hasCalendarPermission by viewModel.hasCalendarPermission.collectAsState(null)
+    val plugins by viewModel.availablePlugins.collectAsState(emptyList())
+    val enabledProviders by viewModel.enabledProviders.collectAsState(emptySet())
+
+    PreferenceScreen(title = stringResource(R.string.preference_search_calendar)) {
+        item {
+            AnimatedVisibility(hasCalendarPermission == false) {
+                MissingPermissionBanner(
+                    text = stringResource(R.string.missing_permission_calendar_search_settings),
+                    onClick = {
+                        viewModel.requestCalendarPermission(context as AppCompatActivity)
+                    },
+                    modifier = Modifier.padding(16.dp)
+                )
+            }
+            SwitchPreference(
+                title = stringResource(R.string.preference_search_calendar),
+                summary = stringResource(R.string.preference_search_calendar_summary),
+                value = enabledProviders.contains("local") && hasCalendarPermission == true,
+                onValueChanged = {
+                    viewModel.setProviderEnabled("local", it)
+                },
+                enabled = hasCalendarPermission == true
+            )
+            for (plugin in plugins) {
+                val state = plugin.state
+                if (state is PluginState.SetupRequired) {
+                    Banner(
+                        modifier = Modifier.padding(16.dp),
+                        text = state.message ?: stringResource(id = R.string.plugin_state_setup_required),
+                        icon = Icons.Rounded.ErrorOutline,
+                        primaryAction = {
+                            TextButton(onClick = {
+                                try {
+                                    state.setupActivity.sendWithBackgroundPermission(context)
+                                } catch (e: PendingIntent.CanceledException) {
+                                    CrashReporter.logException(e)
+                                }
+                            }) {
+                                Text(stringResource(id = R.string.plugin_action_setup))
+                            }
+                        }
+                    )
+                }
+                SwitchPreference(
+                    title = plugin.plugin.label,
+                    enabled = state is PluginState.Ready,
+                    summary = (state as? PluginState.Ready)?.text
+                        ?: (state as? PluginState.SetupRequired)?.message
+                        ?: plugin.plugin.description,
+                    value = enabledProviders.contains(plugin.plugin.authority) && state is PluginState.Ready,
+                    onValueChanged = {
+                        viewModel.setProviderEnabled(plugin.plugin.authority, it)
+                    },
+                )
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreenVM.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreenVM.kt
new file mode 100644
index 000000000..74e4c0919
--- /dev/null
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/calendarsearch/CalendarSearchSettingsScreenVM.kt
@@ -0,0 +1,34 @@
+package de.mm20.launcher2.ui.settings.calendarsearch
+
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.ViewModel
+import de.mm20.launcher2.permissions.PermissionGroup
+import de.mm20.launcher2.permissions.PermissionsManager
+import de.mm20.launcher2.plugin.PluginType
+import de.mm20.launcher2.plugins.PluginService
+import de.mm20.launcher2.preferences.search.CalendarSearchSettings
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+
+class CalendarSearchSettingsScreenVM : ViewModel(), KoinComponent {
+    private val settings: CalendarSearchSettings by inject()
+    private val pluginService: PluginService by inject()
+    private val permissionsManager: PermissionsManager by inject()
+
+    val hasCalendarPermission = permissionsManager.hasPermission(PermissionGroup.Calendar)
+
+    val availablePlugins = pluginService.getPluginsWithState(
+        type = PluginType.Calendar,
+        enabled = true,
+    )
+
+    val enabledProviders = settings.enabledProviders
+
+    fun setProviderEnabled(providerId: String, enabled: Boolean) {
+        settings.setProviderEnabled(providerId, enabled)
+    }
+
+    fun requestCalendarPermission(activity: AppCompatActivity) {
+        permissionsManager.requestPermission(activity, PermissionGroup.Calendar)
+    }
+}
\ No newline at end of file
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/filesearch/FileSearchSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/filesearch/FileSearchSettingsScreen.kt
index 235caab71..a6add212a 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/filesearch/FileSearchSettingsScreen.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/filesearch/FileSearchSettingsScreen.kt
@@ -27,6 +27,7 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import de.mm20.launcher2.accounts.AccountType
 import de.mm20.launcher2.crashreporter.CrashReporter
 import de.mm20.launcher2.ktx.isAtLeastApiLevel
+import de.mm20.launcher2.ktx.sendWithBackgroundPermission
 import de.mm20.launcher2.plugin.PluginState
 import de.mm20.launcher2.ui.R
 import de.mm20.launcher2.ui.component.Banner
@@ -196,7 +197,7 @@ fun FileSearchSettingsScreen() {
                             primaryAction = {
                                 TextButton(onClick = {
                                     try {
-                                        state.setupActivity.send()
+                                        state.setupActivity.sendWithBackgroundPermission(context)
                                     } catch (e: PendingIntent.CanceledException) {
                                         CrashReporter.logException(e)
                                     }
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/locations/LocationsSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/locations/LocationsSettingsScreen.kt
index 9c5fbf9c7..5f3704949 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/locations/LocationsSettingsScreen.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/locations/LocationsSettingsScreen.kt
@@ -22,6 +22,7 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import de.mm20.launcher2.crashreporter.CrashReporter
+import de.mm20.launcher2.ktx.sendWithBackgroundPermission
 import de.mm20.launcher2.plugin.PluginState
 import de.mm20.launcher2.preferences.search.LocationSearchSettings
 import de.mm20.launcher2.ui.R
@@ -41,6 +42,7 @@ fun LocationsSettingsScreen() {
     val viewModel: LocationsSettingsScreenVM = viewModel()
 
     val navController = LocalNavController.current
+    val context = LocalContext.current
 
     val osmLocations by viewModel.osmLocations.collectAsState()
     val imperialUnits by viewModel.imperialUnits.collectAsState()
@@ -85,7 +87,7 @@ fun LocationsSettingsScreen() {
                                     primaryAction = {
                                         TextButton(onClick = {
                                             try {
-                                                state.setupActivity.send()
+                                                state.setupActivity.sendWithBackgroundPermission(context)
                                             } catch (e: PendingIntent.CanceledException) {
                                                 CrashReporter.logException(e)
                                             }
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/plugins/PluginSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/plugins/PluginSettingsScreen.kt
index 4a699fbf7..8867c174f 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/plugins/PluginSettingsScreen.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/plugins/PluginSettingsScreen.kt
@@ -27,6 +27,7 @@ import androidx.compose.material.icons.rounded.Info
 import androidx.compose.material.icons.rounded.LightMode
 import androidx.compose.material.icons.rounded.Place
 import androidx.compose.material.icons.rounded.Settings
+import androidx.compose.material.icons.rounded.Today
 import androidx.compose.material.icons.rounded.Verified
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -243,6 +244,7 @@ fun PluginSettingsScreen(pluginId: String) {
                                         PluginType.FileSearch -> Icons.AutoMirrored.Rounded.InsertDriveFile
                                         PluginType.Weather -> Icons.Rounded.LightMode
                                         PluginType.LocationSearch -> Icons.Rounded.Place
+                                        PluginType.Calendar -> Icons.Rounded.Today
                                     },
                                     null,
                                     modifier = Modifier.size(16.dp),
@@ -253,6 +255,7 @@ fun PluginSettingsScreen(pluginId: String) {
                                         PluginType.FileSearch -> stringResource(R.string.plugin_type_filesearch)
                                         PluginType.Weather -> stringResource(R.string.plugin_type_weather)
                                         PluginType.LocationSearch -> stringResource(R.string.plugin_type_locationsearch)
+                                        PluginType.Calendar -> stringResource(R.string.plugin_type_calendar)
                                     },
                                     modifier = Modifier.padding(horizontal = 4.dp),
                                     style = MaterialTheme.typography.labelMedium,
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreen.kt
index c8d618662..b320e0da0 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreen.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreen.kt
@@ -116,28 +116,13 @@ fun SearchSettingsScreen() {
                     enabled = hasContactsPermission == true
                 )
 
-                val hasCalendarPermission by viewModel.hasCalendarPermission.collectAsStateWithLifecycle(
-                    null
-                )
-                AnimatedVisibility(hasCalendarPermission == false) {
-                    MissingPermissionBanner(
-                        text = stringResource(R.string.missing_permission_calendar_search_settings),
-                        onClick = {
-                            viewModel.requestCalendarPermission(context as AppCompatActivity)
-                        },
-                        modifier = Modifier.padding(16.dp)
-                    )
-                }
-                val calendar by viewModel.calendar.collectAsStateWithLifecycle(null)
-                SwitchPreference(
+                Preference(
                     title = stringResource(R.string.preference_search_calendar),
                     summary = stringResource(R.string.preference_search_calendar_summary),
                     icon = Icons.Rounded.Today,
-                    value = calendar == true && hasCalendarPermission == true,
-                    onValueChanged = {
-                        viewModel.setCalendar(it)
+                    onClick = {
+                        navController?.navigate("settings/search/calendar")
                     },
-                    enabled = hasCalendarPermission == true
                 )
 
                 val hasAppShortcutsPermission by viewModel.hasAppShortcutPermission.collectAsStateWithLifecycle(
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreenVM.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreenVM.kt
index e17d6db88..f12b29f4d 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreenVM.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/search/SearchSettingsScreenVM.kt
@@ -61,19 +61,6 @@ class SearchSettingsScreenVM : ViewModel(), KoinComponent {
         permissionsManager.requestPermission(activity, PermissionGroup.Contacts)
     }
 
-    val hasCalendarPermission = permissionsManager.hasPermission(PermissionGroup.Calendar)
-        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
-    val calendar = calendarSearchSettings.enabled
-        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
-
-    fun setCalendar(calendar: Boolean) {
-        calendarSearchSettings.setEnabled(calendar)
-    }
-
-    fun requestCalendarPermission(activity: AppCompatActivity) {
-        permissionsManager.requestPermission(activity, PermissionGroup.Calendar)
-    }
-
     val calculator = calculatorSearchSettings.enabled
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
 
diff --git a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/weather/WeatherIntegrationSettingsScreen.kt b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/weather/WeatherIntegrationSettingsScreen.kt
index 4198ce7a1..626c1fdf9 100644
--- a/app/ui/src/main/java/de/mm20/launcher2/ui/settings/weather/WeatherIntegrationSettingsScreen.kt
+++ b/app/ui/src/main/java/de/mm20/launcher2/ui/settings/weather/WeatherIntegrationSettingsScreen.kt
@@ -17,6 +17,7 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import de.mm20.launcher2.crashreporter.CrashReporter
+import de.mm20.launcher2.ktx.sendWithBackgroundPermission
 import de.mm20.launcher2.plugin.PluginState
 import de.mm20.launcher2.ui.BuildConfig
 import de.mm20.launcher2.ui.R
@@ -58,7 +59,7 @@ fun WeatherIntegrationSettingsScreen() {
                         primaryAction = {
                             TextButton(onClick = {
                                 try {
-                                    state.setupActivity.send()
+                                    state.setupActivity.sendWithBackgroundPermission(context)
                                 } catch (e: PendingIntent.CanceledException) {
                                     CrashReporter.logException(e)
                                 }
diff --git a/core/base/src/main/java/de/mm20/launcher2/plugin/QueryPluginApi.kt b/core/base/src/main/java/de/mm20/launcher2/plugin/QueryPluginApi.kt
index 413973f44..0800b2bf3 100644
--- a/core/base/src/main/java/de/mm20/launcher2/plugin/QueryPluginApi.kt
+++ b/core/base/src/main/java/de/mm20/launcher2/plugin/QueryPluginApi.kt
@@ -46,7 +46,7 @@ abstract class QueryPluginApi<TQuery, TResult>(
             val uri = Uri.Builder()
                 .scheme("content")
                 .authority(pluginAuthority)
-                .path(LocationPluginContract.Paths.Search)
+                .path(SearchPluginContract.Paths.Search)
                 .appendQueryParameters(query)
                 .appendQueryParameter(
                     SearchPluginContract.Params.AllowNetwork,
diff --git a/core/base/src/main/java/de/mm20/launcher2/search/CalendarEvent.kt b/core/base/src/main/java/de/mm20/launcher2/search/CalendarEvent.kt
index a1a72439f..c6e73adc0 100644
--- a/core/base/src/main/java/de/mm20/launcher2/search/CalendarEvent.kt
+++ b/core/base/src/main/java/de/mm20/launcher2/search/CalendarEvent.kt
@@ -6,14 +6,17 @@ import de.mm20.launcher2.icons.StaticLauncherIcon
 import de.mm20.launcher2.icons.TextLayer
 import java.text.SimpleDateFormat
 
-interface CalendarEvent: SavableSearchable {
+interface CalendarEvent : SavableSearchable {
     val color: Int?
-    val startTime: Long
+    val startTime: Long?
     val endTime: Long
     val allDay: Boolean
     val description: String?
+    val calendarName: String?
     val location: String?
     val attendees: List<String>
+    val isCompleted: Boolean?
+        get() = null
 
 
     override val preferDetailsOverLaunch: Boolean
@@ -24,7 +27,7 @@ interface CalendarEvent: SavableSearchable {
         val df = SimpleDateFormat("dd")
         return StaticLauncherIcon(
             foregroundLayer = TextLayer(
-                text = df.format(startTime),
+                text = df.format(startTime ?: endTime),
                 color = color ?: 0,
             ),
             backgroundLayer = ColorLayer(color ?: 0)
diff --git a/core/i18n/src/main/res/values/strings.xml b/core/i18n/src/main/res/values/strings.xml
index 3d5590cc9..ddda3e83c 100644
--- a/core/i18n/src/main/res/values/strings.xml
+++ b/core/i18n/src/main/res/values/strings.xml
@@ -848,6 +848,7 @@
     <string name="search_filter_online">Online results</string>
     <string name="search_filter_apps">Apps</string>
     <string name="plugin_type_locationsearch">Places search</string>
+    <string name="plugin_type_calendar">Calendar</string>
     <string name="preference_default_filter">Default filter</string>
     <string name="preference_default_filter_summary">Customize the default filter for searches</string>
     <string name="preference_filter_bar">Show filter bar</string>
diff --git a/core/preferences/src/main/java/de/mm20/launcher2/preferences/LauncherSettingsData.kt b/core/preferences/src/main/java/de/mm20/launcher2/preferences/LauncherSettingsData.kt
index 0e0ca465e..cc223a0c4 100644
--- a/core/preferences/src/main/java/de/mm20/launcher2/preferences/LauncherSettingsData.kt
+++ b/core/preferences/src/main/java/de/mm20/launcher2/preferences/LauncherSettingsData.kt
@@ -53,7 +53,9 @@ data class LauncherSettingsData internal constructor(
 
     val contactSearchEnabled: Boolean = true,
 
+    @Deprecated("Use calendarSearchProviders `local` instead")
     val calendarSearchEnabled: Boolean = true,
+    val calendarSearchProviders: Set<String> = setOf("local"),
 
     val shortcutSearchEnabled: Boolean = true,
 
diff --git a/core/preferences/src/main/java/de/mm20/launcher2/preferences/search/CalendarSearchSettings.kt b/core/preferences/src/main/java/de/mm20/launcher2/preferences/search/CalendarSearchSettings.kt
index c41794f17..cc1895bf3 100644
--- a/core/preferences/src/main/java/de/mm20/launcher2/preferences/search/CalendarSearchSettings.kt
+++ b/core/preferences/src/main/java/de/mm20/launcher2/preferences/search/CalendarSearchSettings.kt
@@ -5,13 +5,20 @@ import kotlinx.coroutines.flow.map
 
 class CalendarSearchSettings internal constructor(
     private val dataStore: LauncherDataStore,
-){
-    val enabled
-        get() = dataStore.data.map { it.calendarSearchEnabled }
+) {
+    val providers
+        get() = dataStore.data.map { it.calendarSearchProviders }
 
-    fun setEnabled(enabled: Boolean) {
+    val enabledProviders
+        get() = dataStore.data.map { it.calendarSearchProviders }
+
+    fun setProviderEnabled(provider: String, enabled: Boolean) {
         dataStore.update {
-            it.copy(calendarSearchEnabled = enabled)
+            if (enabled) {
+                it.copy(calendarSearchProviders = it.calendarSearchProviders + provider)
+            } else {
+                it.copy(calendarSearchProviders = it.calendarSearchProviders - provider)
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/core/shared/src/main/java/de/mm20/launcher2/plugin/contracts/CalendarPluginContract.kt b/core/shared/src/main/java/de/mm20/launcher2/plugin/contracts/CalendarPluginContract.kt
index 2bc627ae7..58e091b11 100644
--- a/core/shared/src/main/java/de/mm20/launcher2/plugin/contracts/CalendarPluginContract.kt
+++ b/core/shared/src/main/java/de/mm20/launcher2/plugin/contracts/CalendarPluginContract.kt
@@ -1,7 +1,7 @@
 package de.mm20.launcher2.plugin.contracts
 
 abstract class CalendarPluginContract {
-    object EventColumns: Columns() {
+    object EventColumns : Columns() {
         /**
          * The unique ID of the event.
          */
@@ -17,6 +17,11 @@ abstract class CalendarPluginContract {
          */
         val Description = column<String>("description")
 
+        /**
+         * The calendar name of the event.
+         */
+        val CalendarName = column<String>("calendar_name")
+
         /**
          * The location of the event.
          */
@@ -33,9 +38,9 @@ abstract class CalendarPluginContract {
         val EndTime = column<Long>("end_time")
 
         /**
-         * Whether the event is an all-day event.
+         * Whether the times should include times or truncate to dates.
          */
-        val AllDay = column<Boolean>("all_day")
+        val IncludeTime = column<Boolean>("include_time")
 
         /**
          * The color of the event.
@@ -46,5 +51,34 @@ abstract class CalendarPluginContract {
          * The attendees of the event.
          */
         val Attendees = column<List<String>>("attendees")
+
+        /**
+         * The URI of the event.
+         */
+        val Uri = column<String>("uri")
+
+        /**
+         * Whether the event is a task and if so, whether it is completed.
+         */
+        val IsCompleted = column<Boolean>("completed")
+    }
+
+    object CalendarListColumns : Columns() {
+        val Id = column<String>("id")
+        val Name = column<String>("name")
+        val Color = column<Int>("color")
+        val AccountName = column<String>("account_name")
+    }
+
+
+    object Params {
+        const val Query = "query"
+        const val StartTime = "start"
+        const val EndTime = "end"
+        const val Exclude = "exclude"
+    }
+
+    object Paths {
+        const val CalendarLists = "calendar_lists"
     }
 }
\ No newline at end of file
diff --git a/core/shared/src/main/java/de/mm20/launcher2/search/calendar/CalendarQuery.kt b/core/shared/src/main/java/de/mm20/launcher2/search/calendar/CalendarQuery.kt
new file mode 100644
index 000000000..47701f3db
--- /dev/null
+++ b/core/shared/src/main/java/de/mm20/launcher2/search/calendar/CalendarQuery.kt
@@ -0,0 +1,11 @@
+package de.mm20.launcher2.search.calendar
+
+data class CalendarQuery(
+    val query: String?,
+    val start: Long?,
+    val end: Long?,
+    /**
+     * List of calendar list ids that should be excluded from the search results.
+     */
+    val excludedCalendars: List<String>,
+)
\ No newline at end of file
diff --git a/data/calendar/build.gradle.kts b/data/calendar/build.gradle.kts
index 33c7bb567..e399a1298 100644
--- a/data/calendar/build.gradle.kts
+++ b/data/calendar/build.gradle.kts
@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.android.library)
     alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.plugin.serialization)
 }
 
 android {
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarRepository.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarRepository.kt
index fcc973fa0..17644ecfc 100644
--- a/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarRepository.kt
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarRepository.kt
@@ -1,42 +1,51 @@
 package de.mm20.launcher2.calendar
 
-import android.content.ContentUris
 import android.content.Context
-import android.provider.CalendarContract
-import androidx.core.database.getStringOrNull
+import de.mm20.launcher2.calendar.providers.AndroidCalendarProvider
+import de.mm20.launcher2.calendar.providers.CalendarList
+import de.mm20.launcher2.calendar.providers.CalendarProvider
+import de.mm20.launcher2.calendar.providers.PluginCalendarProvider
 import de.mm20.launcher2.permissions.PermissionGroup
 import de.mm20.launcher2.permissions.PermissionsManager
+import de.mm20.launcher2.plugin.PluginRepository
+import de.mm20.launcher2.plugin.PluginType
 import de.mm20.launcher2.preferences.search.CalendarSearchSettings
 import de.mm20.launcher2.search.CalendarEvent
 import de.mm20.launcher2.search.SearchableRepository
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
-import kotlinx.collections.immutable.toImmutableList
-import kotlinx.coroutines.Dispatchers
+import kotlinx.collections.immutable.toPersistentList
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.channelFlow
-import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.combineTransform
+import kotlinx.coroutines.flow.emitAll
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.withContext
-import java.util.Calendar
+import kotlinx.coroutines.flow.transform
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.supervisorScope
+import kotlin.time.Duration.Companion.days
 
 interface CalendarRepository : SearchableRepository<CalendarEvent> {
     fun findMany(
         from: Long = System.currentTimeMillis(),
         to: Long = from + 14 * 24 * 60 * 60 * 1000L,
-        excludeCalendars: List<Long> = emptyList(),
+        excludeCalendars: List<String> = emptyList(),
         excludeAllDayEvents: Boolean = false,
-        limit: Int = 999,
     ): Flow<ImmutableList<CalendarEvent>>
 
-    suspend fun getCalendars(): List<UserCalendar>
+    fun getCalendars(providerId: String? = null): Flow<List<CalendarList>>
 }
 
 internal class CalendarRepositoryImpl(
     private val context: Context,
     private val permissionsManager: PermissionsManager,
+    private val pluginRepository: PluginRepository,
     private val settings: CalendarSearchSettings,
 ) : CalendarRepository {
 
@@ -48,48 +57,62 @@ internal class CalendarRepositoryImpl(
         }
 
         val hasPermission = permissionsManager.hasPermission(PermissionGroup.Calendar)
-        val enabled = settings.enabled
+        val providerIds = settings.providers
 
-        return hasPermission.combine(enabled) { a, b -> a && b }
-            .map {
-                if (it) {
-                    val now = System.currentTimeMillis()
-                    queryCalendarEvents(
-                        query,
-                        intervalStart = now,
-                        intervalEnd = now + 14 * 24 * 60 * 60 * 1000L,
-                    ).toImmutableList()
-                } else {
-                    persistentListOf()
+        return combineTransform(hasPermission, providerIds) { perm, providerIds ->
+            val providers = providerIds.mapNotNull {
+                when (it) {
+                    "local" -> if (perm) AndroidCalendarProvider(context) else null
+                    else -> PluginCalendarProvider(context, it)
                 }
             }
 
+            val now = System.currentTimeMillis()
+            emitAll(
+                queryCalendarEvents(
+                    query = query,
+                    excludeAllDayEvents = false,
+                    providers = providers,
+                    intervalStart = now,
+                    intervalEnd = now + 730.days.inWholeMilliseconds,
+                    allowNetwork = allowNetwork,
+                )
+            )
+        }
     }
 
     override fun findMany(
         from: Long,
         to: Long,
-        excludeCalendars: List<Long>,
+        excludeCalendars: List<String>,
         excludeAllDayEvents: Boolean,
-        limit: Int,
-    ) = channelFlow<ImmutableList<CalendarEvent>> {
+    ): Flow<ImmutableList<CalendarEvent>> {
         val hasPermission = permissionsManager.hasPermission(PermissionGroup.Calendar)
-        hasPermission.collectLatest {
-            if (it) {
-                val events = withContext(Dispatchers.IO) {
-                    queryCalendarEvents(
-                        query = null,
-                        intervalStart = from,
-                        intervalEnd = to,
-                        limit = limit,
-                        excludeAllDayEvents = excludeAllDayEvents,
-                        excludeCalendars = excludeCalendars
-                    )
-                }
-                send(events.toImmutableList())
-            } else {
-                send(persistentListOf())
+        val plugins = pluginRepository.findMany(
+            type = PluginType.Calendar,
+            enabled = true,
+        )
+        return combineTransform(hasPermission, plugins) { perm, plugins ->
+            val providers = buildList {
+                if (perm) add(AndroidCalendarProvider(context)) else null
+                addAll(
+                    plugins.map {
+                        PluginCalendarProvider(context, it.authority)
+                    }
+                )
             }
+
+            emitAll(
+                queryCalendarEvents(
+                    query = null,
+                    intervalStart = from,
+                    intervalEnd = to,
+                    excludeAllDayEvents = excludeAllDayEvents,
+                    excludeCalendars = excludeCalendars,
+                    providers = providers,
+                    allowNetwork = false,
+                )
+            )
         }
     }
 
@@ -97,124 +120,70 @@ internal class CalendarRepositoryImpl(
         query: String?,
         intervalStart: Long,
         intervalEnd: Long,
-        limit: Int = 10,
         excludeAllDayEvents: Boolean = false,
-        excludeCalendars: List<Long> = emptyList(),
-    ): List<AndroidCalendarEvent> {
-        val results = withContext(Dispatchers.IO) {
-            val results = mutableListOf<AndroidCalendarEvent>()
-            val builder = CalendarContract.Instances.CONTENT_URI.buildUpon()
-            ContentUris.appendId(builder, intervalStart)
-            ContentUris.appendId(builder, intervalEnd)
-            val uri = builder.build()
-            val projection = arrayOf(
-                CalendarContract.Instances.EVENT_ID,
-                CalendarContract.Instances.TITLE,
-                CalendarContract.Instances.BEGIN,
-                CalendarContract.Instances.END,
-                CalendarContract.Instances.ALL_DAY,
-                CalendarContract.Instances.DISPLAY_COLOR,
-                CalendarContract.Instances.EVENT_LOCATION,
-                CalendarContract.Instances.CALENDAR_ID,
-                CalendarContract.Instances.DESCRIPTION
-            )
-            val selection = mutableListOf<String>()
-            if (query != null) selection.add("${CalendarContract.Instances.TITLE} LIKE ?")
-            if (excludeCalendars.isNotEmpty()) selection.add("${CalendarContract.Instances.CALENDAR_ID} NOT IN (${excludeCalendars.joinToString()})")
-            if (excludeAllDayEvents) selection.add("${CalendarContract.Instances.ALL_DAY} = 0")
-            val selArgs = if (query != null) arrayOf("%$query%") else null
-            val sort =
-                "${CalendarContract.Instances.BEGIN} ASC" + if (limit > -1) " LIMIT $limit" else ""
-            val cursor = context.contentResolver.query(
-                uri,
-                projection,
-                selection.joinToString(separator = " AND "),
-                selArgs,
-                sort
-            ) ?: return@withContext mutableListOf()
-            val proj = arrayOf(
-                CalendarContract.Attendees.EVENT_ID,
-                CalendarContract.Attendees.ATTENDEE_NAME,
-                CalendarContract.Attendees.ATTENDEE_EMAIL
-            )
-            val s = "${CalendarContract.Attendees.ATTENDEE_NAME} COLLATE NOCASE ASC"
-            while (cursor.moveToNext()) {
-                val sel = "${CalendarContract.Attendees.EVENT_ID} = ${cursor.getLong(0)}"
-                val cur = context.contentResolver.query(
-                    CalendarContract.Attendees.CONTENT_URI,
-                    proj, sel, null, s
-                ) ?: return@withContext mutableListOf()
-                val attendees = mutableListOf<String>()
-                while (cur.moveToNext()) {
-                    attendees.add(
-                        cur.getStringOrNull(1).takeUnless { it.isNullOrBlank() }
-                            ?: cur.getStringOrNull(2)
-                            ?: continue
+        excludeCalendars: List<String> = emptyList(),
+        allowNetwork: Boolean = false,
+        providers: List<CalendarProvider>,
+    ): Flow<ImmutableList<CalendarEvent>> = flow {
+        supervisorScope {
+            val result = MutableStateFlow(persistentListOf<CalendarEvent>())
+
+            for (provider in providers) {
+                launch {
+                    val r = provider.search(
+                        query,
+                        from = intervalStart,
+                        to = intervalEnd,
+                        excludedCalendars = excludeCalendars.mapNotNull {
+                            val (namespace, id) = it.split(":")
+                            if (namespace == provider.namespace) id else null
+                        },
+                        excludeAllDayEvents = excludeAllDayEvents,
+                        allowNetwork = allowNetwork,
                     )
+                    result.update {
+                        (it + r).toPersistentList()
+                    }
                 }
-                cur.close()
-                val allday = cursor.getInt(4) > 0
-                val begin = cursor.getLong(2)
-
-                val tzOffset = if (allday) {
-                    Calendar.getInstance().timeZone.getOffset(begin)
-                } else {
-                    0
-                }
-                val event = AndroidCalendarEvent(
-                    label = cursor.getStringOrNull(1) ?: "",
-                    id = cursor.getLong(0),
-                    color = cursor.getInt(5),
-                    startTime = begin - tzOffset,
-                    endTime = cursor.getLong(3) - tzOffset - if (allday) 1 else 0,
-                    allDay = allday,
-                    location = cursor.getStringOrNull(6) ?: "",
-                    attendees = attendees,
-                    description = cursor.getStringOrNull(8)
-                        ?: "",
-                    calendar = cursor.getLong(7)
-                )
-                results.add(event)
             }
-            cursor.close()
-            return@withContext results
+            emitAll(result)
         }
-
-        return results
     }
 
-    override suspend fun getCalendars(): List<UserCalendar> {
-        if (!permissionsManager.checkPermissionOnce(PermissionGroup.Calendar)) return emptyList()
-        return withContext(Dispatchers.IO) {
-            val calendars = mutableListOf<UserCalendar>()
-            val uri = CalendarContract.Calendars.CONTENT_URI
-            val proj = arrayOf(
-                CalendarContract.Calendars._ID,
-                CalendarContract.Calendars.NAME,
-                CalendarContract.Calendars.ACCOUNT_NAME,
-                CalendarContract.Calendars.CALENDAR_COLOR,
-                CalendarContract.Calendars.VISIBLE,
-                CalendarContract.Calendars.CALENDAR_DISPLAY_NAME,
+    override fun getCalendars(providerId: String?): Flow<List<CalendarList>> {
+        val hasPermission = permissionsManager.hasPermission(PermissionGroup.Calendar)
+
+        val providers: Flow<List<CalendarProvider>> = if (providerId != null) {
+            when(providerId) {
+                "local" -> hasPermission.map { if (it) listOf(AndroidCalendarProvider(context)) else emptyList() }
+                else -> pluginRepository.get(providerId).map { if (it?.enabled == true) listOf(PluginCalendarProvider(context, providerId)) else emptyList() }
+            }
+        } else {
+            val plugins = pluginRepository.findMany(
+                type = PluginType.Calendar,
+                enabled = true,
             )
-            val cursor = context.contentResolver.query(uri, proj, null, null, null)
-                ?: return@withContext emptyList()
-            while (cursor.moveToNext()) {
-                try {
-                    calendars.add(
-                        UserCalendar(
-                            id = cursor.getLong(0),
-                            name = cursor.getStringOrNull(5) ?: cursor.getStringOrNull(1) ?: "",
-                            owner = cursor.getStringOrNull(2) ?: "",
-                            color = cursor.getInt(3)
-                        )
-                    )
-                } catch (e: NullPointerException) {
-                    continue
+            combine(hasPermission, plugins) { perm, plugins ->
+                buildList {
+                    if (perm) add(AndroidCalendarProvider(context))
+                    addAll(plugins.map { PluginCalendarProvider(context, it.authority) })
                 }
             }
-            cursor.close()
-            calendars.sortBy { it.owner }
-            return@withContext calendars
         }
+
+        return providers.transform { providers ->
+            supervisorScope {
+                val result = MutableStateFlow(emptyList<CalendarList>())
+                for (provider in providers) {
+                    launch {
+                        val r = provider.getCalendarLists()
+                        result.update { it + r }
+                    }
+                }
+                emitAll(result)
+            }
+        }
+
+
     }
 }
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarSerialization.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarSerialization.kt
index ab9ff03fd..eae2070f5 100644
--- a/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarSerialization.kt
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/CalendarSerialization.kt
@@ -1,19 +1,31 @@
 package de.mm20.launcher2.calendar
 
 import android.Manifest
-import android.content.ContentUris
 import android.content.Context
 import android.content.pm.PackageManager
-import android.provider.CalendarContract
+import android.net.Uri
+import android.util.Log
 import androidx.core.content.ContextCompat
-import androidx.core.database.getStringOrNull
+import de.mm20.launcher2.calendar.providers.AndroidCalendarEvent
+import de.mm20.launcher2.calendar.providers.AndroidCalendarProvider
+import de.mm20.launcher2.calendar.providers.PluginCalendarEvent
+import de.mm20.launcher2.calendar.providers.PluginCalendarProvider
+import de.mm20.launcher2.plugin.PluginRepository
+import de.mm20.launcher2.plugin.config.StorageStrategy
 import de.mm20.launcher2.search.SavableSearchable
 import de.mm20.launcher2.search.SearchableDeserializer
 import de.mm20.launcher2.search.SearchableSerializer
+import de.mm20.launcher2.search.UpdateResult
+import de.mm20.launcher2.search.asUpdateResult
+import de.mm20.launcher2.serialization.Json
+import kotlinx.collections.immutable.persistentMapOf
+import kotlinx.collections.immutable.toImmutableMap
+import kotlinx.coroutines.flow.firstOrNull
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.encodeToString
 import org.json.JSONObject
-import java.util.*
 
-class CalendarEventSerializer: SearchableSerializer {
+class AndroidCalendarEventSerializer: SearchableSerializer {
     override fun serialize(searchable: SavableSearchable): String {
         searchable as AndroidCalendarEvent
         val json = JSONObject()
@@ -22,84 +34,117 @@ class CalendarEventSerializer: SearchableSerializer {
     }
 
     override val typePrefix: String
-        get() = "calendar"
+        get() = AndroidCalendarEvent.Domain
 }
 
-class CalendarEventDeserializer(val context: Context): SearchableDeserializer {
+class AndroidCalendarEventDeserializer(val context: Context): SearchableDeserializer {
     override suspend fun deserialize(serialized: String): SavableSearchable? {
         if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_CALENDAR) != PackageManager.PERMISSION_GRANTED) return null
         val json = JSONObject(serialized)
         val id = json.getLong("id")
-        val builder = CalendarContract.Instances.CONTENT_URI.buildUpon()
-        ContentUris.appendId(builder, System.currentTimeMillis())
-        ContentUris.appendId(builder, System.currentTimeMillis() + 63072000000L)
-        val uri = builder.build()
-        val projection = arrayOf(
-            CalendarContract.Instances.EVENT_ID,
-            CalendarContract.Instances.TITLE,
-            CalendarContract.Instances.BEGIN,
-            CalendarContract.Instances.END,
-            CalendarContract.Instances.ALL_DAY,
-            CalendarContract.Instances.DISPLAY_COLOR,
-            CalendarContract.Instances.EVENT_LOCATION,
-            CalendarContract.Instances.CALENDAR_ID,
-            CalendarContract.Instances.DESCRIPTION
-        )
-        val selection = CalendarContract.Instances.EVENT_ID + " = ?"
-        val selArgs = arrayOf(id.toString())
-        val cursor = context.contentResolver.query(uri, projection, selection, selArgs, null)
-            ?: return null
-        if (cursor.moveToNext()) {
-            val title = cursor.getStringOrNull(1) ?: ""
-            val begin = cursor.getLong(2)
-            val end = cursor.getLong(3)
-            val allday = cursor.getInt(4) != 0
-            val color = cursor.getInt(5)
-            val location = cursor.getStringOrNull(6)
-            val calendar = cursor.getLong(7)
-            val description = cursor.getStringOrNull(8)
-                ?: ""
-            cursor.close()
-            val proj = arrayOf(
-                CalendarContract.Attendees.EVENT_ID,
-                CalendarContract.Attendees.ATTENDEE_NAME,
-                CalendarContract.Attendees.ATTENDEE_EMAIL
-            )
-            val sel = "${CalendarContract.Attendees.EVENT_ID} = $id"
-            val s = "${CalendarContract.Attendees.ATTENDEE_NAME} COLLATE NOCASE ASC"
-            val cur = context.contentResolver.query(
-                CalendarContract.Attendees.CONTENT_URI,
-                proj, sel, null, s
-            ) ?: return null
-            val attendees = mutableListOf<String>()
-            while (cur.moveToNext()) {
-                attendees.add(
-                    cur.getStringOrNull(1).takeUnless { it.isNullOrBlank() }
-                    ?: cur.getStringOrNull(2)
-                    ?: continue
+        return AndroidCalendarProvider(context).get(id)
+    }
+
+}
+
+@Serializable
+internal data class SerializedCalendarEvent(
+    val id: String? = null,
+    val authority: String? = null,
+    val color: Int? = null,
+    val startTime: Long? = null,
+    val endTime: Long? = null,
+    val allDay: Boolean? = null,
+    val description: String? = null,
+    val calendarName: String? = null,
+    val location: String? = null,
+    val attendees: List<String>? = null,
+    val uri: String? = null,
+    val completed: Boolean? = null,
+    val label: String? = null,
+    val timestamp: Long = 0L,
+    val strategy: StorageStrategy = StorageStrategy.StoreCopy,
+)
+
+class PluginCalendarEventSerializer: SearchableSerializer {
+    override fun serialize(searchable: SavableSearchable): String {
+        searchable as PluginCalendarEvent
+        if (searchable.storageStrategy == StorageStrategy.StoreCopy) {
+            return Json.Lenient.encodeToString(
+                SerializedCalendarEvent(
+                    id = searchable.id,
+                    authority = searchable.authority,
+                    color = searchable.color,
+                    startTime = searchable.startTime,
+                    endTime = searchable.endTime,
+                    allDay = searchable.allDay,
+                    description = searchable.description,
+                    calendarName = searchable.calendarName,
+                    location = searchable.location,
+                    attendees = searchable.attendees,
+                    uri = searchable.uri.toString(),
+                    completed = searchable.isCompleted,
+                    label = searchable.label,
+                    strategy = searchable.storageStrategy,
+                    timestamp = searchable.timestamp,
+                )
+            )
+        } else {
+            return Json.Lenient.encodeToString(
+                SerializedCalendarEvent(
+                    id = searchable.id,
+                    authority = searchable.authority,
+                    strategy = searchable.storageStrategy,
                 )
-            }
-            cur.close()
-            val tzOffset = if (allday) {
-                Calendar.getInstance().timeZone.getOffset(begin)
-            } else {
-                0
-            }
-            return AndroidCalendarEvent(
-                label = title,
-                id = id,
-                color = color,
-                startTime = begin - tzOffset,
-                endTime = end - tzOffset - if (allday) 1 else 0,
-                allDay = allday,
-                location = location ?: "",
-                attendees = attendees,
-                description = description,
-                calendar = calendar
             )
         }
-        cursor.close()
-        return null
+    }
+
+    override val typePrefix: String
+        get() = PluginCalendarEvent.Domain
+}
+
+class PluginCalendarEventDeserializer(
+    val context: Context,
+    private val pluginRepository: PluginRepository,
+): SearchableDeserializer {
+    override suspend fun deserialize(serialized: String): SavableSearchable? {
+        val json = Json.Lenient.decodeFromString<SerializedCalendarEvent>(serialized)
+        val authority = json.authority ?: return null
+        val id = json.id ?: return null
+        val strategy = json.strategy
+        val plugin = pluginRepository.get(authority).firstOrNull() ?: return null
+        if (!plugin.enabled) return null
+
+        return when(strategy) {
+            StorageStrategy.StoreReference -> {
+                PluginCalendarProvider(context, authority).get(id).getOrNull()
+            }
+            else -> {
+                val timestamp = json.timestamp
+                PluginCalendarEvent(
+                    id = id,
+                    color = json.color,
+                    startTime = json.startTime ?: 0,
+                    endTime = json.endTime ?: 0,
+                    allDay = json.allDay ?: false,
+                    description = json.description,
+                    calendarName = json.calendarName,
+                    location = json.location,
+                    attendees = json.attendees ?: emptyList(),
+                    label = json.label ?: return null,
+                    uri = Uri.parse(json.uri ?: return null),
+                    isCompleted = json.completed,
+                    storageStrategy = StorageStrategy.StoreCopy,
+                    authority = authority,
+                    timestamp = timestamp,
+                    updatedSelf = {
+                        if (it !is PluginCalendarEvent) UpdateResult.TemporarilyUnavailable()
+                        else PluginCalendarProvider(context, authority).refresh(it, timestamp).asUpdateResult()
+                    }
+                )
+            }
+        }
     }
 
 }
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/Module.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/Module.kt
index 4f6fcdddb..79d80bddd 100644
--- a/data/calendar/src/main/java/de/mm20/launcher2/calendar/Module.kt
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/Module.kt
@@ -1,5 +1,7 @@
 package de.mm20.launcher2.calendar
 
+import de.mm20.launcher2.calendar.providers.AndroidCalendarEvent
+import de.mm20.launcher2.calendar.providers.PluginCalendarEvent
 import de.mm20.launcher2.search.CalendarEvent
 import de.mm20.launcher2.search.SearchableDeserializer
 import de.mm20.launcher2.search.SearchableRepository
@@ -9,6 +11,7 @@ import org.koin.dsl.module
 
 val calendarModule = module {
     factory<SearchableRepository<CalendarEvent>>(named<CalendarEvent>()) { get<CalendarRepository>() }
-    factory<CalendarRepository> { CalendarRepositoryImpl(androidContext(), get(), get()) }
-    factory<SearchableDeserializer>(named(AndroidCalendarEvent.Domain)) { CalendarEventDeserializer(androidContext()) }
+    factory<CalendarRepository> { CalendarRepositoryImpl(androidContext(), get(), get(), get()) }
+    factory<SearchableDeserializer>(named(AndroidCalendarEvent.Domain)) { AndroidCalendarEventDeserializer(androidContext()) }
+    factory<SearchableDeserializer>(named(PluginCalendarEvent.Domain)) { PluginCalendarEventDeserializer(androidContext(), get()) }
 }
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/AndroidCalendarEvent.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarEvent.kt
similarity index 85%
rename from data/calendar/src/main/java/de/mm20/launcher2/calendar/AndroidCalendarEvent.kt
rename to data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarEvent.kt
index 61cde7d9f..608fba07c 100644
--- a/data/calendar/src/main/java/de/mm20/launcher2/calendar/AndroidCalendarEvent.kt
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarEvent.kt
@@ -1,4 +1,4 @@
-package de.mm20.launcher2.calendar
+package de.mm20.launcher2.calendar.providers
 
 import android.content.ContentUris
 import android.content.Context
@@ -6,6 +6,7 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.provider.CalendarContract
+import de.mm20.launcher2.calendar.AndroidCalendarEventSerializer
 import de.mm20.launcher2.ktx.tryStartActivity
 import de.mm20.launcher2.search.CalendarEvent
 import de.mm20.launcher2.search.SearchableSerializer
@@ -21,7 +22,8 @@ internal data class AndroidCalendarEvent(
     override val location: String?,
     override val attendees: List<String>,
     override val description: String?,
-    val calendar: Long,
+    internal val calendarId: Long,
+    override val calendarName: String?,
     override val labelOverride: String? = null,
 ) : CalendarEvent {
 
@@ -61,7 +63,7 @@ internal data class AndroidCalendarEvent(
     }
 
     override fun getSerializer(): SearchableSerializer {
-        return CalendarEventSerializer()
+        return AndroidCalendarEventSerializer()
     }
 
     companion object {
@@ -69,9 +71,10 @@ internal data class AndroidCalendarEvent(
     }
 }
 
-data class UserCalendar(
-    val id: Long,
+data class CalendarList(
+    val id: String,
     val name: String,
-    val owner: String,
-    val color: Int
+    val owner: String?,
+    val color: Int,
+    val providerId: String,
 )
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarProvider.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarProvider.kt
new file mode 100644
index 000000000..26819a44b
--- /dev/null
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/AndroidCalendarProvider.kt
@@ -0,0 +1,218 @@
+package de.mm20.launcher2.calendar.providers
+
+import android.content.ContentUris
+import android.content.Context
+import android.provider.CalendarContract
+import androidx.core.database.getStringOrNull
+import de.mm20.launcher2.permissions.PermissionGroup
+import de.mm20.launcher2.search.CalendarEvent
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.util.Calendar
+
+class AndroidCalendarProvider(
+    private val context: Context,
+): CalendarProvider {
+    override suspend fun search(
+        query: String?,
+        from: Long,
+        to: Long,
+        excludedCalendars: List<String>,
+        excludeAllDayEvents: Boolean,
+        allowNetwork: Boolean
+    ): List<CalendarEvent> {
+        val results = withContext(Dispatchers.IO) {
+            val results = mutableListOf<AndroidCalendarEvent>()
+            val builder = CalendarContract.Instances.CONTENT_URI.buildUpon()
+            ContentUris.appendId(builder, from)
+            ContentUris.appendId(builder, to)
+            val uri = builder.build()
+            val projection = arrayOf(
+                CalendarContract.Instances.EVENT_ID,
+                CalendarContract.Instances.TITLE,
+                CalendarContract.Instances.BEGIN,
+                CalendarContract.Instances.END,
+                CalendarContract.Instances.ALL_DAY,
+                CalendarContract.Instances.DISPLAY_COLOR,
+                CalendarContract.Instances.EVENT_LOCATION,
+                CalendarContract.Instances.CALENDAR_ID,
+                CalendarContract.Instances.DESCRIPTION,
+                CalendarContract.Instances.CALENDAR_DISPLAY_NAME,
+            )
+            val selection = mutableListOf<String>()
+            if (query != null) selection.add("${CalendarContract.Instances.TITLE} LIKE ?")
+            if (excludedCalendars.isNotEmpty()) selection.add("${CalendarContract.Instances.CALENDAR_ID} NOT IN (${excludedCalendars.joinToString()})")
+            if (excludeAllDayEvents) selection.add("${CalendarContract.Instances.ALL_DAY} = 0")
+            val selArgs = if (query != null) arrayOf("%$query%") else null
+            val sort = "${CalendarContract.Instances.BEGIN} ASC"
+            val cursor = context.contentResolver.query(
+                uri,
+                projection,
+                selection.joinToString(separator = " AND "),
+                selArgs,
+                sort
+            ) ?: return@withContext mutableListOf()
+            val proj = arrayOf(
+                CalendarContract.Attendees.EVENT_ID,
+                CalendarContract.Attendees.ATTENDEE_NAME,
+                CalendarContract.Attendees.ATTENDEE_EMAIL
+            )
+            val s = "${CalendarContract.Attendees.ATTENDEE_NAME} COLLATE NOCASE ASC"
+            while (cursor.moveToNext()) {
+                val sel = "${CalendarContract.Attendees.EVENT_ID} = ${cursor.getLong(0)}"
+                val cur = context.contentResolver.query(
+                    CalendarContract.Attendees.CONTENT_URI,
+                    proj, sel, null, s
+                ) ?: return@withContext mutableListOf()
+                val attendees = mutableListOf<String>()
+                while (cur.moveToNext()) {
+                    attendees.add(
+                        cur.getStringOrNull(1).takeUnless { it.isNullOrBlank() }
+                            ?: cur.getStringOrNull(2)
+                            ?: continue
+                    )
+                }
+                cur.close()
+                val allday = cursor.getInt(4) > 0
+                val begin = cursor.getLong(2)
+
+                val tzOffset = if (allday) {
+                    Calendar.getInstance().timeZone.getOffset(begin)
+                } else {
+                    0
+                }
+                val event = AndroidCalendarEvent(
+                    label = cursor.getStringOrNull(1) ?: "",
+                    id = cursor.getLong(0),
+                    color = cursor.getInt(5),
+                    startTime = begin - tzOffset,
+                    endTime = cursor.getLong(3) - tzOffset - if (allday) 1 else 0,
+                    allDay = allday,
+                    location = cursor.getStringOrNull(6) ?: "",
+                    attendees = attendees,
+                    description = cursor.getStringOrNull(8)
+                        ?: "",
+                    calendarId = cursor.getLong(7),
+                    calendarName = cursor.getStringOrNull(9)
+                )
+                results.add(event)
+            }
+            cursor.close()
+            return@withContext results
+        }
+
+        return results
+    }
+
+    suspend fun get(id: Long): CalendarEvent? = withContext(Dispatchers.IO) {
+        val builder = CalendarContract.Instances.CONTENT_URI.buildUpon()
+        ContentUris.appendId(builder, System.currentTimeMillis())
+        ContentUris.appendId(builder, System.currentTimeMillis() + 63072000000L)
+        val uri = builder.build()
+        val projection = arrayOf(
+            CalendarContract.Instances.EVENT_ID,
+            CalendarContract.Instances.TITLE,
+            CalendarContract.Instances.BEGIN,
+            CalendarContract.Instances.END,
+            CalendarContract.Instances.ALL_DAY,
+            CalendarContract.Instances.DISPLAY_COLOR,
+            CalendarContract.Instances.EVENT_LOCATION,
+            CalendarContract.Instances.CALENDAR_ID,
+            CalendarContract.Instances.DESCRIPTION,
+            CalendarContract.Instances.CALENDAR_DISPLAY_NAME,
+        )
+        val selection = CalendarContract.Instances.EVENT_ID + " = ?"
+        val selArgs = arrayOf(id.toString())
+        val cursor = context.contentResolver.query(uri, projection, selection, selArgs, null)
+            ?: return@withContext null
+        if (cursor.moveToNext()) {
+            val title = cursor.getStringOrNull(1) ?: ""
+            val begin = cursor.getLong(2)
+            val end = cursor.getLong(3)
+            val allday = cursor.getInt(4) != 0
+            val color = cursor.getInt(5)
+            val location = cursor.getStringOrNull(6)
+            val calendar = cursor.getLong(7)
+            val description = cursor.getStringOrNull(8)
+            val calendarName = cursor.getStringOrNull(9)
+            cursor.close()
+            val proj = arrayOf(
+                CalendarContract.Attendees.EVENT_ID,
+                CalendarContract.Attendees.ATTENDEE_NAME,
+                CalendarContract.Attendees.ATTENDEE_EMAIL
+            )
+            val sel = "${CalendarContract.Attendees.EVENT_ID} = $id"
+            val s = "${CalendarContract.Attendees.ATTENDEE_NAME} COLLATE NOCASE ASC"
+            val cur = context.contentResolver.query(
+                CalendarContract.Attendees.CONTENT_URI,
+                proj, sel, null, s
+            ) ?: return@withContext null
+            val attendees = mutableListOf<String>()
+            while (cur.moveToNext()) {
+                attendees.add(
+                    cur.getStringOrNull(1).takeUnless { it.isNullOrBlank() }
+                        ?: cur.getStringOrNull(2)
+                        ?: continue
+                )
+            }
+            cur.close()
+            val tzOffset = if (allday) {
+                Calendar.getInstance().timeZone.getOffset(begin)
+            } else {
+                0
+            }
+            return@withContext AndroidCalendarEvent(
+                label = title,
+                id = id,
+                color = color,
+                startTime = begin - tzOffset,
+                endTime = end - tzOffset - if (allday) 1 else 0,
+                allDay = allday,
+                location = location ?: "",
+                attendees = attendees,
+                description = description,
+                calendarId = calendar,
+                calendarName = calendarName
+            )
+        }
+        cursor.close()
+        return@withContext null
+    }
+
+    override suspend fun getCalendarLists(): List<CalendarList> {
+        return withContext(Dispatchers.IO) {
+            val calendars = mutableListOf<CalendarList>()
+            val uri = CalendarContract.Calendars.CONTENT_URI
+            val proj = arrayOf(
+                CalendarContract.Calendars._ID,
+                CalendarContract.Calendars.NAME,
+                CalendarContract.Calendars.ACCOUNT_NAME,
+                CalendarContract.Calendars.CALENDAR_COLOR,
+                CalendarContract.Calendars.VISIBLE,
+                CalendarContract.Calendars.CALENDAR_DISPLAY_NAME,
+            )
+            val cursor = context.contentResolver.query(uri, proj, null, null, null)
+                ?: return@withContext emptyList()
+            while (cursor.moveToNext()) {
+                try {
+                    calendars.add(
+                        CalendarList(
+                            id = "local:${cursor.getLong(0)}",
+                            name = cursor.getStringOrNull(5) ?: cursor.getStringOrNull(1) ?: "",
+                            owner = cursor.getStringOrNull(2),
+                            color = cursor.getInt(3),
+                            providerId = "local",
+                        )
+                    )
+                } catch (e: NullPointerException) {
+                    continue
+                }
+            }
+            cursor.close()
+            calendars.sortBy { it.owner }
+            return@withContext calendars
+        }
+    }
+
+    override val namespace: String = "local"
+}
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/CalendarProvider.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/CalendarProvider.kt
new file mode 100644
index 000000000..733ee367d
--- /dev/null
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/CalendarProvider.kt
@@ -0,0 +1,18 @@
+package de.mm20.launcher2.calendar.providers
+
+import de.mm20.launcher2.search.CalendarEvent
+
+internal interface CalendarProvider {
+    suspend fun search(
+        query: String? = null,
+        from: Long = System.currentTimeMillis(),
+        to: Long = from + 14 * 24 * 60 * 60 * 1000L,
+        excludedCalendars: List<String> = emptyList(),
+        excludeAllDayEvents: Boolean = false,
+        allowNetwork: Boolean = false,
+    ): List<CalendarEvent>
+
+    suspend fun getCalendarLists(): List<CalendarList>
+
+    val namespace: String
+}
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarEvent.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarEvent.kt
new file mode 100644
index 000000000..6832d3f33
--- /dev/null
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarEvent.kt
@@ -0,0 +1,65 @@
+package de.mm20.launcher2.calendar.providers
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import de.mm20.launcher2.calendar.PluginCalendarEventSerializer
+import de.mm20.launcher2.ktx.tryStartActivity
+import de.mm20.launcher2.plugin.config.StorageStrategy
+import de.mm20.launcher2.search.CalendarEvent
+import de.mm20.launcher2.search.File
+import de.mm20.launcher2.search.SavableSearchable
+import de.mm20.launcher2.search.SearchableSerializer
+import de.mm20.launcher2.search.UpdatableSearchable
+import de.mm20.launcher2.search.UpdateResult
+
+data class PluginCalendarEvent(
+    val id: String,
+    val authority: String,
+    override val color: Int?,
+    override val startTime: Long?,
+    override val endTime: Long,
+    override val allDay: Boolean,
+    override val description: String?,
+    override val calendarName: String?,
+    override val location: String?,
+    override val attendees: List<String>,
+    val uri: Uri,
+    override val isCompleted: Boolean?,
+    override val label: String,
+    override val labelOverride: String? = null,
+    override val timestamp: Long,
+    internal val storageStrategy: StorageStrategy,
+    override val updatedSelf: (suspend (SavableSearchable) -> UpdateResult<CalendarEvent>)?,
+) : CalendarEvent, UpdatableSearchable<CalendarEvent> {
+    override val domain: String = Domain
+
+    override val key: String
+        get() = "$domain://$authority:$id"
+
+    override fun overrideLabel(label: String): SavableSearchable {
+        return copy(
+            labelOverride = label
+        )
+    }
+
+    override fun launch(context: Context, options: Bundle?): Boolean {
+        return context.tryStartActivity(
+            Intent(
+                Intent.ACTION_VIEW
+            ).apply {
+                data = uri
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK
+            }, options
+        )
+    }
+
+    override fun getSerializer(): SearchableSerializer {
+        return PluginCalendarEventSerializer()
+    }
+
+    companion object {
+        const val Domain = "plugin.calendar"
+    }
+}
\ No newline at end of file
diff --git a/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarProvider.kt b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarProvider.kt
new file mode 100644
index 000000000..14253d4b3
--- /dev/null
+++ b/data/calendar/src/main/java/de/mm20/launcher2/calendar/providers/PluginCalendarProvider.kt
@@ -0,0 +1,186 @@
+package de.mm20.launcher2.calendar.providers
+
+import android.content.Context
+import android.database.Cursor
+import android.net.Uri
+import android.os.Bundle
+import android.os.CancellationSignal
+import android.util.Log
+import de.mm20.launcher2.plugin.QueryPluginApi
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract.CalendarListColumns
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract.EventColumns
+import de.mm20.launcher2.plugin.data.set
+import de.mm20.launcher2.plugin.data.withColumns
+import de.mm20.launcher2.search.CalendarEvent
+import de.mm20.launcher2.search.UpdateResult
+import de.mm20.launcher2.search.asUpdateResult
+import de.mm20.launcher2.search.calendar.CalendarQuery
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.withContext
+import kotlin.coroutines.resume
+
+class PluginCalendarProvider(
+    private val context: Context,
+    private val pluginAuthority: String,
+) : QueryPluginApi<CalendarQuery, PluginCalendarEvent>(
+    context, pluginAuthority
+), CalendarProvider {
+    override suspend fun search(
+        query: String?,
+        from: Long,
+        to: Long,
+        excludedCalendars: List<String>,
+        excludeAllDayEvents: Boolean,
+        allowNetwork: Boolean
+    ): List<CalendarEvent> {
+        return search(
+            CalendarQuery(
+                query = query,
+                start = from,
+                end = to,
+                excludedCalendars = excludedCalendars,
+            ),
+            allowNetwork,
+        )
+    }
+
+    override fun Uri.Builder.appendQueryParameters(query: CalendarQuery): Uri.Builder {
+        appendQueryParameter(
+            CalendarPluginContract.Params.Query,
+            query.query
+        )
+        val start = query.start
+        if (start != null) {
+            appendQueryParameter(
+                CalendarPluginContract.Params.StartTime,
+                start.toString()
+            )
+        }
+        val end = query.end
+        if (end != null) {
+            appendQueryParameter(
+                CalendarPluginContract.Params.EndTime,
+                end.toString()
+            )
+        }
+        if (query.excludedCalendars.isNotEmpty()) {
+            appendQueryParameter(
+                CalendarPluginContract.Params.Exclude,
+                query.excludedCalendars.joinToString(",")
+            )
+        }
+        return this
+    }
+
+    override fun Cursor.getData(): List<PluginCalendarEvent>? {
+        val config = getConfig()
+        val cursor = this
+
+        if (config == null) {
+            Log.e("MM20", "Plugin ${pluginAuthority} returned null config")
+            cursor.close()
+            return null
+        }
+
+        val results = mutableListOf<PluginCalendarEvent>()
+        val timestamp = System.currentTimeMillis()
+        cursor.withColumns(EventColumns) {
+            while (cursor.moveToNext()) {
+                results += PluginCalendarEvent(
+                    id = cursor[EventColumns.Id] ?: continue,
+                    authority = pluginAuthority,
+                    uri = Uri.parse(cursor[EventColumns.Uri] ?: continue),
+                    color = cursor[EventColumns.Color],
+                    label = cursor[EventColumns.Title] ?: continue,
+                    description = cursor[EventColumns.Description],
+                    location = cursor[EventColumns.Location],
+                    calendarName = cursor[EventColumns.CalendarName],
+                    allDay = cursor[EventColumns.IncludeTime] == false,
+                    startTime = cursor[EventColumns.StartTime],
+                    endTime = cursor[EventColumns.EndTime] ?: continue,
+                    attendees = cursor[EventColumns.Attendees] ?: emptyList(),
+                    isCompleted = cursor[EventColumns.IsCompleted],
+                    updatedSelf = {
+                        if (it !is PluginCalendarEvent) UpdateResult.TemporarilyUnavailable()
+                        else refresh(it, timestamp).asUpdateResult()
+                    },
+                    storageStrategy = config.storageStrategy,
+                    timestamp = timestamp,
+                )
+            }
+        }
+        cursor.close()
+        return results
+    }
+
+    override fun PluginCalendarEvent.toBundle(): Bundle {
+        return Bundle().apply {
+            set(EventColumns.Id, id)
+            set(EventColumns.Title, label)
+            set(EventColumns.Description, description)
+            set(EventColumns.CalendarName, calendarName)
+            set(EventColumns.Location, location)
+            set(EventColumns.Color, color)
+            set(EventColumns.StartTime, startTime)
+            set(EventColumns.EndTime, endTime)
+            set(EventColumns.IncludeTime, !allDay)
+            set(EventColumns.Attendees, attendees)
+            set(EventColumns.Uri, uri.toString())
+            set(EventColumns.IsCompleted, isCompleted)
+        }
+    }
+
+    override suspend fun getCalendarLists(): List<CalendarList> = withContext(Dispatchers.IO) {
+        val uri = Uri.Builder()
+            .scheme("content")
+            .authority(pluginAuthority)
+            .path(CalendarPluginContract.Paths.CalendarLists)
+            .build()
+        val cancellationSignal = CancellationSignal()
+
+        return@withContext suspendCancellableCoroutine {
+            it.invokeOnCancellation {
+                cancellationSignal.cancel()
+            }
+            val cursor = try {
+                context.contentResolver.query(
+                    uri,
+                    null,
+                    null,
+                    cancellationSignal
+                )
+            } catch (e: Exception) {
+                Log.e("MM20", "Plugin $pluginAuthority threw exception", e)
+                it.resume(emptyList())
+                return@suspendCancellableCoroutine
+            }
+
+            if (cursor == null) {
+                Log.e("MM20", "Plugin $pluginAuthority returned null cursor")
+                it.resume(emptyList())
+                return@suspendCancellableCoroutine
+            }
+
+            val results = mutableListOf<CalendarList>()
+            cursor.use {
+                cursor.withColumns(CalendarListColumns) {
+                    while (cursor.moveToNext()) {
+                        results += CalendarList(
+                            id = "${pluginAuthority}:" + (cursor[CalendarListColumns.Id] ?: continue),
+                            color = cursor[CalendarListColumns.Color] ?: 0,
+                            name = cursor[CalendarListColumns.Name] ?: continue,
+                            owner = cursor[CalendarListColumns.AccountName],
+                            providerId = pluginAuthority,
+                        )
+                    }
+                }
+            }
+
+            it.resume(results)
+        }
+    }
+
+    override val namespace: String = pluginAuthority
+}
\ No newline at end of file
diff --git a/data/locations/src/main/java/de/mm20/launcher2/locations/providers/PluginLocationProvider.kt b/data/locations/src/main/java/de/mm20/launcher2/locations/providers/PluginLocationProvider.kt
index 2c0734a93..5a0f23474 100644
--- a/data/locations/src/main/java/de/mm20/launcher2/locations/providers/PluginLocationProvider.kt
+++ b/data/locations/src/main/java/de/mm20/launcher2/locations/providers/PluginLocationProvider.kt
@@ -95,6 +95,7 @@ internal class PluginLocationProvider(
                 )
             }
         }
+        cursor.close()
         return results
     }
 
diff --git a/data/widgets/src/main/java/de/mm20/launcher2/widgets/CalendarWidget.kt b/data/widgets/src/main/java/de/mm20/launcher2/widgets/CalendarWidget.kt
index d04759936..c94a35c9d 100644
--- a/data/widgets/src/main/java/de/mm20/launcher2/widgets/CalendarWidget.kt
+++ b/data/widgets/src/main/java/de/mm20/launcher2/widgets/CalendarWidget.kt
@@ -1,12 +1,7 @@
 package de.mm20.launcher2.widgets
 
-import android.app.Activity
-import android.appwidget.AppWidgetHost
-import android.content.ComponentName
-import android.content.Context
-import android.content.Intent
 import de.mm20.launcher2.database.entities.PartialWidgetEntity
-import de.mm20.launcher2.ktx.tryStartActivity
+import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
@@ -15,7 +10,11 @@ import java.util.UUID
 @Serializable
 data class CalendarWidgetConfig(
     val allDayEvents: Boolean = true,
-    val excludedCalendarIds: List<Long> = emptyList(),
+    @Deprecated("Use excludedCalendars instead")
+    @SerialName("excludedCalendarIds")
+    val legacyExcludedCalendarIds: List<Long>? = null,
+    @SerialName("excludedCalendars")
+    val excludedCalendarIds: List<String>? = null,
 )
 data class CalendarWidget(
     override val id: UUID,
diff --git a/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarEvent.kt b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarEvent.kt
new file mode 100644
index 000000000..63f371046
--- /dev/null
+++ b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarEvent.kt
@@ -0,0 +1,41 @@
+package de.mm20.launcher2.sdk.calendar
+
+import android.net.Uri
+
+data class CalendarEvent(
+    val id: String,
+    val title: String,
+    /**
+     * The name of the calendar the event belongs to.
+     */
+    val calendarName: String?,
+    val description: String? = null,
+    /**
+     * The location of the event.
+     */
+    val location: String? = null,
+    /**
+     * The color of the event, as 0xAARRGGBB int.
+     */
+    val color: Int? = null,
+    /**
+     * Start time of the event in milliseconds since epoch.
+     * For tasks, this can be null.
+     */
+    val startTime: Long?,
+    /**
+     * End time of the event in milliseconds since epoch.
+     * For tasks: Due date of the task.
+     */
+    val endTime: Long,
+    /**
+     * If false, only the date will be shown for the event.
+     */
+    val includeTime: Boolean = true,
+    val attendees: List<String> = emptyList(),
+    val uri: Uri,
+    /**
+     * If this is not null, the event is treated as a task, indicated by a checkmark in the UI.
+     */
+    val isCompleted: Boolean? = null,
+)
\ No newline at end of file
diff --git a/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarList.kt b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarList.kt
new file mode 100644
index 000000000..63e869cab
--- /dev/null
+++ b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarList.kt
@@ -0,0 +1,8 @@
+package de.mm20.launcher2.sdk.calendar
+
+data class CalendarList(
+    val id: String,
+    val name: String,
+    val accountName: String? = null,
+    val color: Int? = null,
+)
\ No newline at end of file
diff --git a/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarProvider.kt b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarProvider.kt
new file mode 100644
index 000000000..54916fe0e
--- /dev/null
+++ b/plugins/sdk/src/main/java/de/mm20/launcher2/sdk/calendar/CalendarProvider.kt
@@ -0,0 +1,110 @@
+package de.mm20.launcher2.sdk.calendar
+
+import android.database.Cursor
+import android.net.Uri
+import android.os.Bundle
+import android.os.CancellationSignal
+import de.mm20.launcher2.plugin.PluginType
+import de.mm20.launcher2.plugin.config.QueryPluginConfig
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract.CalendarListColumns
+import de.mm20.launcher2.plugin.contracts.CalendarPluginContract.EventColumns
+import de.mm20.launcher2.plugin.contracts.SearchPluginContract
+import de.mm20.launcher2.plugin.data.buildCursor
+import de.mm20.launcher2.plugin.data.get
+import de.mm20.launcher2.sdk.base.QueryPluginProvider
+import de.mm20.launcher2.sdk.utils.launchWithCancellationSignal
+import de.mm20.launcher2.search.calendar.CalendarQuery
+import java.time.Instant
+import java.time.ZoneId
+import java.time.ZonedDateTime
+
+abstract class CalendarProvider(
+    config: QueryPluginConfig,
+) : QueryPluginProvider<CalendarQuery, CalendarEvent>(
+    config
+) {
+    override fun query(
+        uri: Uri,
+        projection: Array<out String>?,
+        queryArgs: Bundle?,
+        cancellationSignal: CancellationSignal?
+    ): Cursor? {
+        super.query(uri, projection, queryArgs, cancellationSignal)?.let {
+            return it
+        }
+
+        if (uri.pathSegments.size == 1 && uri.pathSegments.first() == CalendarPluginContract.Paths.CalendarLists) {
+            return getCalendarLists(cancellationSignal).toCursor()
+        }
+        return null
+    }
+
+    private fun getCalendarLists(cancellationSignal: CancellationSignal?): List<CalendarList> {
+        return launchWithCancellationSignal(cancellationSignal) {
+            getCalendarLists()
+        }
+    }
+
+    abstract suspend fun getCalendarLists(): List<CalendarList>
+
+    override fun getQuery(uri: Uri): CalendarQuery {
+        val query = uri.getQueryParameter(CalendarPluginContract.Params.Query)
+        val start = uri.getQueryParameter(CalendarPluginContract.Params.StartTime)?.toLongOrNull()
+        val end = uri.getQueryParameter(CalendarPluginContract.Params.EndTime)?.toLongOrNull()
+        val excludedCalendars = uri.getQueryParameter(CalendarPluginContract.Params.Exclude)?.split(",") ?: emptyList()
+
+        return CalendarQuery(
+            query = query,
+            start = start,
+            end = end,
+            excludedCalendars = excludedCalendars,
+        )
+    }
+
+    override fun Bundle.toResult(): CalendarEvent? {
+        return CalendarEvent(
+            id = get(EventColumns.Id) ?: return null,
+            title = get(EventColumns.Title) ?: return null,
+            description = get(EventColumns.Description),
+            location = get(EventColumns.Location),
+            color = get(EventColumns.Color),
+            calendarName = get(EventColumns.CalendarName),
+            startTime = get(EventColumns.StartTime),
+            endTime = get(EventColumns.EndTime) ?: return null,
+            includeTime = get(EventColumns.IncludeTime) ?: true,
+            attendees = get(EventColumns.Attendees) ?: emptyList(),
+            uri = Uri.parse(get(EventColumns.Uri) ?: return null),
+        )
+    }
+
+    override fun List<CalendarEvent>.toCursor(): Cursor {
+        return buildCursor(EventColumns, this) {
+            put(EventColumns.Id, it.id)
+            put(EventColumns.Title, it.title)
+            put(EventColumns.Description, it.description)
+            put(EventColumns.Location, it.location)
+            put(EventColumns.CalendarName, it.calendarName)
+            put(EventColumns.Color, it.color)
+            put(EventColumns.StartTime, it.startTime)
+            put(EventColumns.EndTime, it.endTime)
+            put(EventColumns.IncludeTime, it.includeTime)
+            put(EventColumns.Attendees, it.attendees)
+            put(EventColumns.Uri, it.uri.toString())
+            put(EventColumns.IsCompleted, it.isCompleted)
+        }
+    }
+
+    override fun getPluginType(): PluginType {
+        return PluginType.Calendar
+    }
+
+    private fun List<CalendarList>.toCursor(): Cursor {
+        return buildCursor(CalendarListColumns, this) {
+            put(CalendarListColumns.Id, it.id)
+            put(CalendarListColumns.Name, it.name)
+            put(CalendarListColumns.Color, it.color)
+            put(CalendarListColumns.AccountName, it.accountName)
+        }
+    }
+}
\ No newline at end of file