Add permission banner to calendar widget settings

ui/src/main/java/de/mm20/launcher2/ui/settings/calendarwidget/CalendarWidgetSettingsScreen.kt

@@ -1,5 +1,7 @@
 package de.mm20.launcher2.ui.settings.calendarwidget
 
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
@@ -11,12 +13,14 @@ import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import androidx.lifecycle.viewmodel.compose.viewModel
 import de.mm20.launcher2.search.data.UserCalendar
 import de.mm20.launcher2.ui.R
+import de.mm20.launcher2.ui.component.MissingPermissionBanner
 import de.mm20.launcher2.ui.component.preferences.Preference
 import de.mm20.launcher2.ui.component.preferences.PreferenceCategory
 import de.mm20.launcher2.ui.component.preferences.PreferenceScreen
@@ -26,10 +30,21 @@ import de.mm20.launcher2.ui.pluralResource
 @Composable
 fun CalendarWidgetSettingsScreen() {
     val viewModel: CalendarWidgetSettingsScreenVM = viewModel()
+    val context = LocalContext.current
     PreferenceScreen(title = stringResource(R.string.preference_screen_calendarwidget)) {
         item {
             val excludeAllDayEvents by viewModel.excludeAllDayEvents.observeAsState()
             PreferenceCategory {
+                val hasPermission by viewModel.hasCalendarPermission.observeAsState()
+                AnimatedVisibility(hasPermission == false) {
+                    MissingPermissionBanner(
+                        modifier = Modifier.padding(16.dp),
+                        text = stringResource(R.string.missing_permission_calendar_widget_settings),
+                        onClick = {
+                            viewModel.requestPermission(context as AppCompatActivity)
+                        }
+                    )
+                }
                 SwitchPreference(
                     title = stringResource(R.string.preference_calendar_hide_allday),
                     value = excludeAllDayEvents == true,

ui/src/main/java/de/mm20/launcher2/ui/settings/calendarwidget/CalendarWidgetSettingsScreenVM.kt

@@ -1,10 +1,13 @@
 package de.mm20.launcher2.ui.settings.calendarwidget
 
+import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.asLiveData
 import androidx.lifecycle.liveData
 import androidx.lifecycle.viewModelScope
 import de.mm20.launcher2.calendar.CalendarRepository
+import de.mm20.launcher2.permissions.PermissionGroup
+import de.mm20.launcher2.permissions.PermissionsManager
 import de.mm20.launcher2.preferences.LauncherDataStore
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
@@ -14,6 +17,9 @@ import org.koin.core.component.inject
 class CalendarWidgetSettingsScreenVM : ViewModel(), KoinComponent {
     private val dataStore: LauncherDataStore by inject()
     private val calendarRepository: CalendarRepository by inject()
+    private val permissionsManager: PermissionsManager by inject()
+
+    val hasCalendarPermission = permissionsManager.hasPermission(PermissionGroup.Calendar).asLiveData()
 
     val excludeAllDayEvents = dataStore.data.map { it.calendarWidget.hideAlldayEvents }.asLiveData()
     fun setExcludeAllDayEvents(excludeAllDayEvents: Boolean) {
@@ -49,4 +55,8 @@ class CalendarWidgetSettingsScreenVM : ViewModel(), KoinComponent {
             }
         }
     }
+
+    fun requestPermission(activity: AppCompatActivity) {
+        permissionsManager.requestPermission(activity, PermissionGroup.Calendar)
+    }
 }