add watchlist to home fragment

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

@@ -29,6 +29,9 @@ import kotlinx.coroutines.*
 import java.io.FileNotFoundException
 import java.net.URL
 
+/**
+ * TODO remove gson usage
+ */
 class MetaDBController {
 
     companion object {

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

@@ -1,89 +0,0 @@
-package org.mosad.teapod.util
-
-import android.content.Context
-import android.net.Uri
-import android.util.Log
-import com.google.gson.Gson
-import com.google.gson.JsonParser
-import kotlinx.coroutines.*
-import java.io.File
-import java.io.FileReader
-import java.io.FileWriter
-
-/**
- * This controller contains the logic for permanently saved data.
- * On load, it loads the saved files into the variables
- */
-object StorageController {
-
-    private const val fileNameMyList = "my_list.json"
-
-    val myList = ArrayList<Int>() // a list of saved mediaIds
-
-    fun load(context: Context) {
-        loadMyList(context)
-    }
-
-    fun loadMyList(context: Context) {
-        val file = File(context.filesDir, fileNameMyList)
-
-        if (!file.exists()) runBlocking { saveMyList(context).join() }
-
-        try {
-            myList.clear()
-            myList.addAll(JsonParser.parseString(file.readText()).asJsonArray.map { it.asInt }.distinct())
-        } catch (ex: Exception) {
-            myList.clear()
-            Log.e(javaClass.name, "Parsing of My-List failed.")
-        }
-    }
-
-    fun saveMyList(context: Context): Job {
-        val file = File(context.filesDir, fileNameMyList)
-
-        return CoroutineScope(Dispatchers.IO).launch {
-            file.writeText(Gson().toJson(myList.distinct()))
-        }
-    }
-
-    fun exportMyList(context: Context, uri: Uri) {
-        try {
-            context.contentResolver.openFileDescriptor(uri, "w")?.use {
-                FileWriter(it.fileDescriptor).use { writer ->
-                    writer.write(Gson().toJson(myList.distinct()))
-                }
-            }
-        } catch (ex: Exception) {
-            Log.e(javaClass.name, "Exporting my list failed.", ex)
-        }
-    }
-
-    /**
-     * import my list from a (previously exported) json file
-     * @param context the current context
-     * @param uri the uri of the selected file
-     * @return 0 if import was successfull, else 1
-     */
-    fun importMyList(context: Context, uri: Uri): Int {
-        try {
-            val text = context.contentResolver.openFileDescriptor(uri, "r")?.use {
-                FileReader(it.fileDescriptor).use { reader ->
-                    reader.readText()
-                }
-            }
-
-            myList.clear()
-            myList.addAll(JsonParser.parseString(text).asJsonArray.map { it.asInt }.distinct())
-
-            // after the list has been imported also save it
-            saveMyList(context)
-        } catch (ex: Exception) {
-            myList.clear()
-            Log.e(javaClass.name, "Importing my list failed.", ex)
-            return 1
-        }
-
-        return 0
-    }
-
-}