fix updateNextEpisode()

the function could crash, if no matching episode was found, if that's the case now, it returns the first episode

app/src/main/java/org/mosad/teapod/ui/activity/main/fragments/MediaFragment.kt

@@ -183,7 +183,7 @@ class MediaFragment(private val mediaId: Int) : Fragment() {
         (activity as MainActivity).startPlayer(model.media.id, ep.id)
         Log.d(javaClass.name, "Started Player with  episodeId: ${ep.id}")
 
-        model.updateNextEpisode() // set the correct next episode
+        model.updateNextEpisode(ep) // set the correct next episode
     }
 
     /**

app/src/main/java/org/mosad/teapod/ui/activity/main/fragments/MediaFragmentEpisodes.kt

@@ -55,7 +55,7 @@ class MediaFragmentEpisodes : Fragment() {
         (activity as MainActivity).startPlayer(model.media.id, ep.id)
         Log.d(javaClass.name, "Started Player with  episodeId: ${ep.id}")
 
-        model.updateNextEpisode() // set the correct next episode
+        model.updateNextEpisode(ep) // set the correct next episode
     }
 
 }

app/src/main/java/org/mosad/teapod/ui/activity/main/viewmodel/MediaFragmentViewModel.kt

@@ -35,18 +35,14 @@ class MediaFragmentViewModel(application: Application) : AndroidViewModel(applic
     }
 
     /**
-     * based on watched state and current episode number set the next episode
+     * get the next episode based on episode number (the true next episode)
      * if no matching is found, use first episode
      */
-    fun updateNextEpisode() {
+    fun updateNextEpisode(currentEp: Episode) {
         if (media.type == MediaType.MOVIE) return // return if movie
 
-        val currentEpNumber = nextEpisode.number
-        nextEpisode = if (media.episodes.firstOrNull{ !it.watched } != null) {
-            media.episodes.first{ !it.watched && it.number > currentEpNumber }
-        } else {
-            media.episodes.first()
-        }
+        nextEpisode = media.episodes.firstOrNull{ it.number > currentEp.number }
+            ?: media.episodes.first()
     }
 
 }

app/src/main/java/org/mosad/teapod/util/DataTypes.kt

@@ -55,6 +55,7 @@ data class Media(
     fun getEpisodeById(id: Int) = episodes.first { it.id == id }
 }
 
+// TODO all val?
 data class Info(
     var title: String = "",
     var posterUrl: String = "",
@@ -97,6 +98,7 @@ data class Stream(
 
 /**
  * this class is used for tmdb responses
+ * TODO why is runtime var?
  */
 data class TMDBResponse(
     val id: Int = 0,