Initial commit of next alarm sensor (#726)

* Initial commit of next alarm sensor

* Lint

* Review comments

* Remove extra spacing

app/src/full/java/io/homeassistant/companion/android/sensors/AllSensorsUpdaterImpl.kt

@@ -13,7 +13,8 @@ class AllSensorsUpdaterImpl(
     override suspend fun getManagers(): List<SensorManager> {
         val sensorManagers = mutableListOf(
             BatterySensorManager(),
-            NetworkSensorManager()
+            NetworkSensorManager(),
+            NextAlarmManager()
         )
 
         if (integrationUseCase.isBackgroundTrackingEnabled() && PermissionManager.checkLocationPermission(appContext)) {

app/src/main/AndroidManifest.xml

@@ -88,6 +88,13 @@
             </intent-filter>
         </receiver>
 
+        <receiver android:name=".sensors.NextAlarmReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <action android:name="android.app.action.NEXT_ALARM_CLOCK_CHANGED" />
+            </intent-filter>
+        </receiver>
+
         <activity android:name=".launch.LaunchActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/io/homeassistant/companion/android/sensors/NextAlarmManager.kt

@@ -0,0 +1,86 @@
+package io.homeassistant.companion.android.sensors
+
+import android.app.AlarmManager
+import android.content.Context
+import android.util.Log
+import io.homeassistant.companion.android.domain.integration.Sensor
+import io.homeassistant.companion.android.domain.integration.SensorRegistration
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Date
+import java.util.GregorianCalendar
+import java.util.TimeZone
+
+class NextAlarmManager : SensorManager {
+    companion object {
+
+        private const val TAG = "NextAlarm"
+    }
+
+    override fun getSensorRegistrations(context: Context): List<SensorRegistration<Any>> {
+        val sensorRegistrations = mutableListOf<SensorRegistration<Any>>()
+
+        getNextAlarm(context)?.let {
+            sensorRegistrations.add(
+                SensorRegistration(
+                    it,
+                    "Next Alarm",
+                    "timestamp"
+                )
+            )
+        }
+
+        return sensorRegistrations
+    }
+
+    override fun getSensors(context: Context): List<Sensor<Any>> {
+        val sensors = mutableListOf<Sensor<Any>>()
+
+        getNextAlarm(context)?.let {
+            sensors.add(it)
+        }
+
+        return sensors
+    }
+
+    private fun getNextAlarm(context: Context): Sensor<Any>? {
+
+        var triggerTime = 0L
+        var local = ""
+        var utc = "unavailable"
+
+        try {
+            val alarmManager: AlarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+
+            val alarmClockInfo = alarmManager.nextAlarmClock
+
+            if (alarmClockInfo != null) {
+                triggerTime = alarmClockInfo.triggerTime
+
+                val cal: Calendar = GregorianCalendar()
+                cal.timeInMillis = triggerTime
+                local = cal.time.toString()
+
+                val dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
+                val sdf = SimpleDateFormat(dateFormat)
+                sdf.timeZone = TimeZone.getTimeZone("UTC")
+                utc = sdf.format(Date(triggerTime))
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Error getting the next alarm info", e)
+        }
+
+        val icon = "mdi:alarm"
+
+        return Sensor(
+            "next_alarm",
+            utc,
+            "sensor",
+            icon,
+            mapOf(
+                "Local Time" to local,
+                "Time in Milliseconds" to triggerTime
+            )
+        )
+    }
+}

app/src/main/java/io/homeassistant/companion/android/sensors/NextAlarmReceiver.kt

@@ -0,0 +1,40 @@
+package io.homeassistant.companion.android.sensors
+
+import android.app.AlarmManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import io.homeassistant.companion.android.common.dagger.GraphComponentAccessor
+import io.homeassistant.companion.android.domain.integration.IntegrationUseCase
+import javax.inject.Inject
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+
+class NextAlarmReceiver() : BroadcastReceiver() {
+
+    @Inject
+    lateinit var integrationUseCase: IntegrationUseCase
+    private val ioScope = CoroutineScope(Dispatchers.IO)
+    var updateJob: Job? = null
+    override fun onReceive(context: Context, intent: Intent) {
+        val isBootIntent = Intent.ACTION_BOOT_COMPLETED.equals(intent.action, ignoreCase = true)
+        val isNextAlarmIntent =
+            AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED.equals(intent.action, ignoreCase = true)
+        if (!isBootIntent && !isNextAlarmIntent) {
+            return
+        }
+
+        DaggerSensorComponent
+            .builder()
+            .appComponent((context.applicationContext as GraphComponentAccessor).appComponent)
+            .build()
+            .inject(this)
+
+        updateJob?.cancel()
+        updateJob = ioScope.launch {
+            AllSensorsUpdaterImpl(integrationUseCase, context).updateSensors()
+        }
+    }
+}

app/src/main/java/io/homeassistant/companion/android/sensors/SensorComponent.kt

@@ -8,4 +8,6 @@ import io.homeassistant.companion.android.common.dagger.AppComponent
 interface SensorComponent {
 
     fun inject(worker: SensorWorker)
+
+    fun inject(receiver: NextAlarmReceiver)
 }

app/src/minimal/java/io/homeassistant/companion/android/sensors/AllSensorsUpdaterImpl.kt

@@ -11,7 +11,8 @@ class AllSensorsUpdaterImpl(
     override suspend fun getManagers(): List<SensorManager> {
         val sensorManagers = mutableListOf(
             BatterySensorManager(),
-            NetworkSensorManager()
+            NetworkSensorManager(),
+            NextAlarmManager()
         )
 
         return sensorManagers