fix #202: fallback to default ringtone when alarm audio is missing

app/src/main/kotlin/org/fossify/clock/extensions/Context.kt

@@ -12,6 +12,7 @@ import android.content.Intent
 import android.media.AudioAttributes
 import android.media.AudioManager.STREAM_ALARM
 import android.media.RingtoneManager
+import android.net.Uri
 import android.os.Handler
 import android.os.Looper
 import android.text.SpannableString
@@ -51,6 +52,7 @@ import org.fossify.clock.helpers.getDefaultTimeZoneTitle
 import org.fossify.clock.helpers.getTimeOfNextAlarm
 import org.fossify.clock.interfaces.TimerDao
 import org.fossify.clock.models.Alarm
+import org.fossify.clock.models.AlarmEvent
 import org.fossify.clock.models.MyTimeZone
 import org.fossify.clock.models.Timer
 import org.fossify.clock.models.TimerState
@@ -87,6 +89,7 @@ import java.util.Locale
 import kotlin.math.ceil
 import kotlin.time.Duration.Companion.milliseconds
 import kotlin.time.Duration.Companion.minutes
+import org.greenrobot.eventbus.EventBus
 
 val Context.config: Config
     get() = Config.newInstance(applicationContext)
@@ -557,6 +560,26 @@ fun Context.checkAlarmsWithDeletedSoundUri(uri: String) {
         it.soundUri = defaultAlarmSound.uri
         dbHelper.updateAlarm(it)
     }
+    EventBus.getDefault().post(AlarmEvent.Refresh)
+}
+
+fun Context.isUriAccessible(uri: Uri): Boolean {
+    return try {
+        this.contentResolver.openAssetFileDescriptor(uri, "r")?.close()
+        true
+    } catch (_: Exception) {
+        false
+    }
+}
+
+fun Context.isUriAccessible(uriString: String): Boolean {
+    if (uriString.isBlank()) return false
+    return try {
+        val uri = uriString.toUri()
+        isUriAccessible(uri)
+    } catch (_: Exception) {
+        false
+    }
 }
 
 fun Context.rotateWeekdays(days: List<Int>) = days.rotateLeft(config.firstDayOfWeek - 1)

app/src/main/kotlin/org/fossify/clock/services/AlarmService.kt

@@ -6,20 +6,25 @@ import android.media.AudioAttributes
 import android.media.AudioManager
 import android.media.AudioManager.STREAM_ALARM
 import android.media.MediaPlayer
+import android.media.RingtoneManager
 import android.os.Handler
 import android.os.Looper
 import android.os.VibrationEffect
 import android.os.Vibrator
 import androidx.core.net.toUri
 import org.fossify.clock.activities.AlarmActivity
 import org.fossify.clock.extensions.alarmController
+import org.fossify.clock.extensions.checkAlarmsWithDeletedSoundUri
 import org.fossify.clock.extensions.config
 import org.fossify.clock.extensions.dbHelper
+import org.fossify.clock.extensions.isUriAccessible
 import org.fossify.clock.helpers.ALARM_ID
 import org.fossify.clock.helpers.ALARM_NOTIFICATION_ID
 import org.fossify.clock.helpers.AlarmNotificationHelper
 import org.fossify.clock.models.Alarm
+import org.fossify.commons.extensions.getDefaultAlarmSound
 import org.fossify.commons.helpers.SILENT
+import org.fossify.commons.helpers.ensureBackgroundThread
 import kotlin.time.Duration.Companion.seconds
 
 /**
@@ -109,7 +114,15 @@ class AlarmService : Service() {
     }
 
     private fun startAlarmEffects(alarm: Alarm) {
-        if (alarm.soundUri != SILENT) {
+        var soundUri = alarm.soundUri
+        if (!isUriAccessible(soundUri)) {
+            ensureBackgroundThread {
+                checkAlarmsWithDeletedSoundUri(soundUri)
+            }
+            soundUri = applicationContext.getDefaultAlarmSound(RingtoneManager.TYPE_ALARM).uri
+        }
+
+        if (soundUri != SILENT) {
             try {
                 val audioAttributes = AudioAttributes.Builder()
                     .setUsage(AudioAttributes.USAGE_ALARM)
@@ -118,7 +131,7 @@ class AlarmService : Service() {
 
                 mediaPlayer = MediaPlayer().apply {
                     setAudioAttributes(audioAttributes)
-                    setDataSource(this@AlarmService, alarm.soundUri.toUri())
+                    setDataSource(this@AlarmService, soundUri.toUri())
                     isLooping = true
                     prepare()
                     start()