Fix issue #124 - empty queue on restart.

The Gson deserializer required parameter is a reader object.  It
silently fails when passed a string.

app/src/main/java/audio/funkwhale/ffa/playback/QueueManager.kt

@@ -29,7 +29,7 @@ class QueueManager(val context: Context) {
 
   init {
     FFACache.getLine(context, "queue")?.let { json ->
-      gsonDeserializerOf(QueueCache::class.java).deserialize(json)?.let { cache ->
+      gsonDeserializerOf(QueueCache::class.java).deserialize(json.reader())?.let { cache ->
         metadata = cache.data.toMutableList()
 
         val factory = cacheDataSourceFactoryProvider.create(context)

app/src/main/java/audio/funkwhale/ffa/repositories/AlbumsRepository.kt

@@ -35,5 +35,5 @@ class AlbumsRepository(override val context: Context?, artistId: Int? = null) :
 
   override fun cache(data: List<Album>) = AlbumsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(AlbumsCache::class.java).deserialize(json)
+    gsonDeserializerOf(AlbumsCache::class.java).deserialize(json.reader())
 }

app/src/main/java/audio/funkwhale/ffa/repositories/ArtistTracksRepository.kt

@@ -27,5 +27,5 @@ class ArtistTracksRepository(override val context: Context?, private val artistI
 
   override fun cache(data: List<Track>) = TracksCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(TracksCache::class.java).deserialize(json)
+    gsonDeserializerOf(TracksCache::class.java).deserialize(json.reader())
 }

app/src/main/java/audio/funkwhale/ffa/repositories/ArtistsRepository.kt

@@ -26,5 +26,5 @@ class ArtistsRepository(override val context: Context?) : Repository<Artist, Art
 
   override fun cache(data: List<Artist>) = ArtistsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(ArtistsCache::class.java).deserialize(json)
+    gsonDeserializerOf(ArtistsCache::class.java).deserialize(json.reader())
 }

app/src/main/java/audio/funkwhale/ffa/repositories/FavoritesRepository.kt

@@ -34,7 +34,7 @@ class FavoritesRepository(override val context: Context?) : Repository<Track, Tr
 
   override fun cache(data: List<Track>) = TracksCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(TracksCache::class.java).deserialize(json)
+    gsonDeserializerOf(TracksCache::class.java).deserialize(json.reader())
 
   private val favoritedRepository = FavoritedRepository(context!!)
 
@@ -115,7 +115,7 @@ class FavoritedRepository(override val context: Context?) : Repository<Int, Favo
 
   override fun cache(data: List<Int>) = FavoritedCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(FavoritedCache::class.java).deserialize(json)
+    gsonDeserializerOf(FavoritedCache::class.java).deserialize(json.reader())
 
   fun update(context: Context?, scope: CoroutineScope) {
     fetch(Origin.Network.origin).untilNetwork(scope, IO) { favorites, _, _, _ ->

app/src/main/java/audio/funkwhale/ffa/repositories/PlaylistTracksRepository.kt

@@ -30,7 +30,7 @@ class PlaylistTracksRepository(override val context: Context?, playlistId: Int)
 
   override fun cache(data: List<PlaylistTrack>) = PlaylistTracksCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(PlaylistTracksCache::class.java).deserialize(json)
+    gsonDeserializerOf(PlaylistTracksCache::class.java).deserialize(json.reader())
 
   override fun onDataFetched(data: List<PlaylistTrack>): List<PlaylistTrack> = runBlocking {
     val favorites = FavoritedRepository(context).fetch(Origin.Network.origin)

app/src/main/java/audio/funkwhale/ffa/repositories/PlaylistsRepository.kt

@@ -30,7 +30,7 @@ class PlaylistsRepository(override val context: Context?) : Repository<Playlist,
 
   override fun cache(data: List<Playlist>) = PlaylistsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(PlaylistsCache::class.java).deserialize(json)
+    gsonDeserializerOf(PlaylistsCache::class.java).deserialize(json.reader())
 }
 
 class ManagementPlaylistsRepository(override val context: Context?) :
@@ -50,7 +50,7 @@ class ManagementPlaylistsRepository(override val context: Context?) :
 
   override fun cache(data: List<Playlist>) = PlaylistsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(PlaylistsCache::class.java).deserialize(json)
+    gsonDeserializerOf(PlaylistsCache::class.java).deserialize(json.reader())
 
   suspend fun new(name: String): Int? {
     context?.let {

app/src/main/java/audio/funkwhale/ffa/repositories/RadiosRepository.kt

@@ -26,7 +26,7 @@ class RadiosRepository(override val context: Context?) : Repository<Radio, Radio
 
   override fun cache(data: List<Radio>) = RadiosCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(RadiosCache::class.java).deserialize(json)
+    gsonDeserializerOf(RadiosCache::class.java).deserialize(json.reader())
 
   override fun onDataFetched(data: List<Radio>): List<Radio> {
     return data

app/src/main/java/audio/funkwhale/ffa/repositories/SearchRepository.kt

@@ -34,7 +34,7 @@ class TracksSearchRepository(override val context: Context?, var query: String)
 
   override fun cache(data: List<Track>) = TracksCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(TracksCache::class.java).deserialize(json)
+    gsonDeserializerOf(TracksCache::class.java).deserialize(json.reader())
 
   override fun onDataFetched(data: List<Track>): List<Track> = runBlocking {
     val favorites = FavoritedRepository(context).fetch(Origin.Cache.origin)
@@ -76,7 +76,7 @@ class ArtistsSearchRepository(override val context: Context?, var query: String)
 
   override fun cache(data: List<Artist>) = ArtistsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(ArtistsCache::class.java).deserialize(json)
+    gsonDeserializerOf(ArtistsCache::class.java).deserialize(json.reader())
 }
 
 class AlbumsSearchRepository(override val context: Context?, var query: String) :
@@ -96,5 +96,5 @@ class AlbumsSearchRepository(override val context: Context?, var query: String)
 
   override fun cache(data: List<Album>) = AlbumsCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(AlbumsCache::class.java).deserialize(json)
+    gsonDeserializerOf(AlbumsCache::class.java).deserialize(json.reader())
 }

app/src/main/java/audio/funkwhale/ffa/repositories/TracksRepository.kt

@@ -38,7 +38,7 @@ class TracksRepository(override val context: Context?, albumId: Int) :
 
   override fun cache(data: List<Track>) = TracksCache(data)
   override fun uncache(json: String) =
-    gsonDeserializerOf(TracksCache::class.java).deserialize(json)
+    gsonDeserializerOf(TracksCache::class.java).deserialize(json.reader())
 
   companion object {
     fun getDownloadedIds(exoDownloadManager: DownloadManager): List<Int>? {