Merge pull request #1358 from ISO-B/fix_check_files_before_playing

Ensure that there is files available before playing local content

android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt

@@ -18,6 +18,7 @@ import com.audiobookshelf.app.device.DeviceManager
 import com.fasterxml.jackson.annotation.JsonIgnore
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties
 import com.audiobookshelf.app.player.PLAYMETHOD_LOCAL
+import java.io.File
 import java.util.*
 
 @JsonIgnoreProperties(ignoreUnknown = true)
@@ -78,6 +79,27 @@ class LocalLibraryItem(
     }
   }
 
+  @JsonIgnore
+  fun hasTracks(episode:PodcastEpisode?): Boolean {
+    var audioTracks = media.getAudioTracks() as MutableList<AudioTrack>
+    if (episode != null) { // Get podcast episode audio track
+      episode.audioTrack?.let { at -> mutableListOf(at) }?.let { tracks -> audioTracks = tracks }
+    }
+    if (audioTracks.size == 0) return false
+    audioTracks.forEach {
+      // Check that metadata is not null
+      if (it.metadata === null) {
+        return false
+      }
+      // Check that file exists
+      val file = File(it.metadata!!.path)
+      if (!file.exists()) {
+        return false
+      }
+    }
+    return true
+  }
+
   @JsonIgnore
   fun getPlaybackSession(episode:PodcastEpisode?, deviceInfo:DeviceInfo):PlaybackSession {
     val localEpisodeId = episode?.id

android/app/src/main/java/com/audiobookshelf/app/plugins/AbsAudioPlayer.kt

@@ -198,6 +198,9 @@ class AbsAudioPlayer : Plugin() {
             return call.resolve(JSObject("{\"error\":\"Podcast episode not found\"}"))
           }
         }
+        if (!it.hasTracks(episode)) {
+          return call.resolve(JSObject("{\"error\":\"No audio files found on device. Download book again to fix.\"}"))
+        }
 
         Handler(Looper.getMainLooper()).post {
           Log.d(tag, "prepareLibraryItem: Preparing Local Media item ${jacksonMapper.writeValueAsString(it)}")