feat: Fetch duration on recording start

app/src/main/java/app/myzel394/alibi/services/IntervalRecorderService.kt

@@ -1,5 +1,6 @@
 package app.myzel394.alibi.services
 
+import android.media.MediaMetadataRetriever
 import android.media.MediaRecorder
 import app.myzel394.alibi.dataStore
 import app.myzel394.alibi.db.AudioRecorderSettings
@@ -68,11 +69,35 @@ abstract class IntervalRecorderService : ExtraRecorderInformationService() {
         counter = files.size
     }
 
+    private fun fetchRecordingTime() {
+        var oldAmount = 0L
+
+        for (file in outputFolder.listFiles() ?: emptyArray()) {
+            if (file.nameWithoutExtension.toIntOrNull() == null) {
+                continue
+            }
+
+            // It's better to at least get an approximate value, than to crash
+            runCatching {
+                val amount = MediaMetadataRetriever().run {
+                    setDataSource(file.absolutePath)
+                    extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)?.toIntOrNull()
+                        ?: 0
+                }
+
+                oldAmount += amount
+            }
+        }
+
+        recordingTime = oldAmount
+    }
+
     override fun start() {
         super.start()
 
         outputFolder.mkdirs()
         fetchCounterValue()
+        fetchRecordingTime()
 
         scope.launch {
             dataStore.data.collectLatest { preferenceSettings ->

app/src/main/java/app/myzel394/alibi/services/RecorderService.kt

@@ -34,7 +34,7 @@ abstract class RecorderService : Service() {
     var onStateChange: ((RecorderState) -> Unit)? = null
 
     var recordingTime = 0L
-        private set
+        protected set
     private lateinit var recordingTimeTimer: ScheduledExecutorService
     var onRecordingTimeChange: ((Long) -> Unit)? = null
     var notificationDetails: RecorderNotificationHelper.NotificationDetails? = null