From 8f181c74d4a3ad2ff7bf3e772f6e094cf733e17e Mon Sep 17 00:00:00 2001
From: ISO-B <3048685+ISO-B@users.noreply.github.com>
Date: Tue, 29 Oct 2024 22:51:29 +0200
Subject: [PATCH 1/2] Ensure that there is files available before playing local
 content

---
 .../com/audiobookshelf/app/data/LocalLibraryItem.kt    | 10 ++++++++++
 .../com/audiobookshelf/app/plugins/AbsAudioPlayer.kt   |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt b/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt
index c6a25cbd6..8717f6483 100644
--- a/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt
+++ b/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt
@@ -78,6 +78,16 @@ 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
+    return true
+  }
+
   @JsonIgnore
   fun getPlaybackSession(episode:PodcastEpisode?, deviceInfo:DeviceInfo):PlaybackSession {
     val localEpisodeId = episode?.id
diff --git a/android/app/src/main/java/com/audiobookshelf/app/plugins/AbsAudioPlayer.kt b/android/app/src/main/java/com/audiobookshelf/app/plugins/AbsAudioPlayer.kt
index 25a423ba9..e51e2ee6a 100644
--- a/android/app/src/main/java/com/audiobookshelf/app/plugins/AbsAudioPlayer.kt
+++ b/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)}")

From 11804d1cb83f802119e6d7ac2fb933ddf719ab79 Mon Sep 17 00:00:00 2001
From: ISO-B <3048685+ISO-B@users.noreply.github.com>
Date: Mon, 4 Nov 2024 13:54:02 +0200
Subject: [PATCH 2/2] Enhanced check for local audio tracks

When check is triggered code now checks that are files really exists
---
 .../com/audiobookshelf/app/data/LocalLibraryItem.kt  | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt b/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt
index 8717f6483..635c98f21 100644
--- a/android/app/src/main/java/com/audiobookshelf/app/data/LocalLibraryItem.kt
+++ b/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)
@@ -85,6 +86,17 @@ class LocalLibraryItem(
       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
   }