add Episode watched callback

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

@@ -31,7 +31,8 @@ data class Episode(
     var description: String = "",
     var shortDesc: String = "",
     var number: Int = 0,
-    var watched: Boolean = false
+    var watched: Boolean = false,
+    var watchedCallback: String = ""
 )
 
 data class TMDBResponse(

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

@@ -40,6 +40,10 @@ class EpisodesAdapter(private val episodes: List<Episode>, private val context:
         return episodes.size
     }
 
+    fun updateWatchedState(watched: Boolean, position: Int) {
+        episodes[position].watched = watched
+    }
+
     inner class MyViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
         init {
             view.setOnClickListener {