Touch: add import and export for Favorites in Settings

common/src/main/java/de/nicidienase/chaosflix/common/viewmodel/PreferencesViewModel.kt

@@ -1,13 +1,89 @@
 package de.nicidienase.chaosflix.common.viewmodel
 
+import android.arch.lifecycle.LiveData
+import android.arch.lifecycle.MutableLiveData
 import android.arch.lifecycle.ViewModel
+import android.util.Log
+import com.google.gson.Gson
 import de.nicidienase.chaosflix.common.mediadata.sync.Downloader
+import de.nicidienase.chaosflix.common.userdata.entities.watchlist.WatchlistItem
+import de.nicidienase.chaosflix.common.userdata.entities.watchlist.WatchlistItemDao
+import de.nicidienase.chaosflix.common.util.LiveEvent
 import de.nicidienase.chaosflix.common.util.ThreadHandler
+import java.io.BufferedReader
+import java.io.BufferedWriter
+import java.io.File
+import java.io.FileReader
+import java.io.FileWriter
+import java.lang.Exception
+
+class PreferencesViewModel(val downloader: Downloader,
+                           val watchlistItemDao: WatchlistItemDao,
+                           val exportDir: File) : ViewModel() {
+	val gson = Gson()
+
+	private val threadHandler = ThreadHandler()
 
-class PreferencesViewModel(val downloader: Downloader) : ViewModel() {
 	fun cleanNonUserData() {
-		ThreadHandler().runOnBackgroundThread {
+		threadHandler.runOnBackgroundThread {
 			downloader.deleteNonUserData()
 		}
 	}
+
+	fun exportFavorites() {
+		threadHandler.runOnBackgroundThread {
+			val favorites = watchlistItemDao.getAllSync()
+			val json = gson.toJson(favorites)
+			Log.d(TAG, json)
+			if (exportDir.isDirectory) {
+				val file = File("${exportDir.path}${File.separator}$FAVORITES_FILENAME")
+				if (file.exists()) {
+					file.delete()
+					file.createNewFile()
+				}
+				try {
+					val fileWriter = FileWriter(file)
+					val bufferedWriter = BufferedWriter(fileWriter)
+					bufferedWriter.write(json)
+					bufferedWriter.close()
+					fileWriter.close()
+					Log.d(TAG, file.path)
+				} catch (ex: Exception){
+					ex.printStackTrace()
+				}
+			}
+		}
+	}
+
+	fun importFavorites(): MutableLiveData<LiveEvent<State, List<WatchlistItem>, Exception>> {
+		val mutableLiveData = MutableLiveData<LiveEvent<State,List<WatchlistItem>,Exception>>()
+		mutableLiveData.postValue(LiveEvent(State.Loading,null,null))
+		threadHandler.runOnBackgroundThread {
+			val file = File("${exportDir.path}${File.separator}$FAVORITES_FILENAME")
+			try {
+				if(file.exists()){
+					val fileReader = FileReader(file)
+					val bufferedReader = BufferedReader(fileReader)
+					val json: String = bufferedReader.readText()
+					val fromJson = gson.fromJson(json, Array<WatchlistItem>::class.java)
+					fromJson.map { watchlistItemDao.saveItem(WatchlistItem(eventGuid = it.eventGuid)) }
+					mutableLiveData.postValue(LiveEvent(State.Done,fromJson.asList(),null))
+				} else {
+					mutableLiveData.postValue(LiveEvent(State.Done,null,null))
+				}
+			} catch (ex: Exception){
+				mutableLiveData.postValue(LiveEvent(State.Done,null,ex))
+			}
+		}
+		return mutableLiveData
+	}
+
+	enum class State {
+		Loading, Done
+	}
+
+	companion object {
+		val TAG = PreferencesViewModel::class.java.simpleName
+		val FAVORITES_FILENAME = "chaosflix_favorites.json"
+	}
 }

common/src/main/java/de/nicidienase/chaosflix/common/viewmodel/ViewModelFactory.kt

@@ -3,6 +3,7 @@ package de.nicidienase.chaosflix.common.viewmodel
 import android.arch.lifecycle.ViewModel
 import android.arch.lifecycle.ViewModelProvider
 import android.content.Context
+import android.os.Environment
 import android.preference.PreferenceManager
 import de.nicidienase.chaosflix.common.DatabaseFactory
 import de.nicidienase.chaosflix.common.OfflineItemManager
@@ -22,6 +23,7 @@ class ViewModelFactory(context: Context) : ViewModelProvider.Factory {
 	val offlineItemManager =
 			OfflineItemManager(context.applicationContext, database.offlineEventDao(),preferencesManager)
 	val downloader by lazy { Downloader(recordingApi, database) }
+	val externalFilesDir = Environment.getExternalStorageDirectory()
 
 	@Suppress("UNCHECKED_CAST")
 	override fun <T : ViewModel?> create(modelClass: Class<T>): T {
@@ -32,7 +34,7 @@ class ViewModelFactory(context: Context) : ViewModelProvider.Factory {
 		} else if (modelClass.isAssignableFrom(DetailsViewModel::class.java)) {
 			return DetailsViewModel(database, offlineItemManager, preferencesManager, downloader) as T
 		} else if (modelClass.isAssignableFrom(PreferencesViewModel::class.java)){
-			return PreferencesViewModel(downloader) as T
+			return PreferencesViewModel(downloader, database.watchlistItemDao(), externalFilesDir) as T
 		} else {
 			throw UnsupportedOperationException("The requested ViewModel is currently unsupported. " +
 					"Please make sure to implement are correct creation of it. " +

common/src/main/res/values/strings.xml

@@ -45,4 +45,6 @@
     <string name="setting_choose_stream">Automatically choose stream</string>
     <string name="setting_metered_networks">Allow downloads over metered networks</string>
     <string name="settings_choose_recording">Automatically choose recording</string>
+    <string name="export_favorites">Export Favorites</string>
+    <string name="import_favorites">Import Favorites</string>
 </resources>

common/src/main/res/xml/preferences.xml

@@ -2,31 +2,45 @@
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
     <CheckBoxPreference
+        android:defaultValue="false"
         android:key="allow_metered_networks"
-        android:defaultValue="false"
-        android:title="@string/setting_metered_networks"
-        android:summary="@string/pref_mobile_downloads"/>
+        android:summary="@string/pref_mobile_downloads"
+        android:title="@string/setting_metered_networks"/>
 
     <CheckBoxPreference
+        android:defaultValue="false"
         android:key="auto_select_stream"
-        android:defaultValue="false"
-        android:title="@string/setting_choose_stream"
-        android:summary="@string/pref_autoselect_stream"/>
+        android:summary="@string/pref_autoselect_stream"
+        android:title="@string/setting_choose_stream"/>
 
     <CheckBoxPreference
-        android:key="auto_select_recording"
         android:defaultValue="false"
-        android:title="@string/settings_choose_recording"
-        android:summary="@string/pref_autoselect_recording"/>
+        android:key="auto_select_recording"
+        android:summary="@string/pref_autoselect_recording"
+        android:title="@string/settings_choose_recording"/>
 
     <Preference
         android:id="@+id/download_folder"
         android:key="download_folder"
         android:title="@string/download_folder"/>
 
-    <Preference
-        android:id="@+id/deleteData"
-        android:key="delete_data"
-        android:title="@string/clean_cache"/>
+    <PreferenceCategory
+        android:title="Debug">
+
+        <Preference
+            android:id="@+id/deleteData"
+            android:key="delete_data"
+            android:title="@string/clean_cache"/>
+        <Preference
+            android:id="@+id/export_favorites"
+            android:key="export_favorites"
+            android:title="@string/export_favorites"/>
+        <Preference
+            android:id="@+id/import_favorites"
+            android:key="import_favorites"
+            android:title="@string/import_favorites"/>
+
+    </PreferenceCategory>
+
 
 </PreferenceScreen>

touch/src/main/java/de/nicidienase/chaosflix/touch/settings/SettingsFragment.kt

@@ -1,10 +1,12 @@
 package de.nicidienase.chaosflix.touch.settings
 
+import android.arch.lifecycle.Observer
 import android.arch.lifecycle.ViewModelProviders
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.preference.PreferenceManager
+import android.support.design.widget.Snackbar
 import android.support.v7.preference.PreferenceFragmentCompat
 import de.nicidienase.chaosflix.R
 import de.nicidienase.chaosflix.common.viewmodel.PreferencesViewModel
@@ -30,7 +32,7 @@ class SettingsFragment : PreferenceFragmentCompat() {
 
         if (requestCode == REQUEST_DIRECTORY) {
             if (resultCode == DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED) {
-                val dir = data!!.getStringExtra(DirectoryChooserActivity.RESULT_SELECTED_DIR)
+                val dir = data?.getStringExtra(DirectoryChooserActivity.RESULT_SELECTED_DIR)
                 val sharedPref = PreferenceManager.getDefaultSharedPreferences(requireContext().applicationContext)
                 val edit = sharedPref.edit()
                 edit.putString("download_folder", dir)
@@ -52,6 +54,8 @@ class SettingsFragment : PreferenceFragmentCompat() {
         updateSummary()
 		val downloadFolderPref = this.findPreference("download_folder")
 	    val cleanCachePref = this.findPreference("delete_data")
+	    val exportFavorites = this.findPreference("export_favorites")
+	    val importFavorites = this.findPreference("import_favorites")
 
 		downloadFolderPref?.setOnPreferenceClickListener {
 			val chooserIntent = Intent(context, DirectoryChooserActivity::class.java)
@@ -72,6 +76,36 @@ class SettingsFragment : PreferenceFragmentCompat() {
 			viewModel.cleanNonUserData()
 			return@setOnPreferenceClickListener true
 			}
+
+		exportFavorites?.setOnPreferenceClickListener {
+			viewModel.exportFavorites()
+			return@setOnPreferenceClickListener true
+		}
+
+		importFavorites?.setOnPreferenceClickListener {
+			var snackbar: Snackbar? = null
+			viewModel.importFavorites().observe(this, Observer { event ->
+				when {
+					event?.state == PreferencesViewModel.State.Loading -> {
+						snackbar?.dismiss()
+						snackbar = Snackbar.make(listView,"Importing",Snackbar.LENGTH_INDEFINITE)
+						snackbar?.show()
+					}
+					event?.error != null -> {
+						snackbar?.dismiss()
+						val message: String = event.error?.message ?: event.error.toString()
+						snackbar = Snackbar.make(listView, message, Snackbar.LENGTH_SHORT)
+						snackbar?.show()
+					}
+					event?.state == PreferencesViewModel.State.Done -> {
+						snackbar?.dismiss()
+						snackbar = Snackbar.make(listView,"Import Done",Snackbar.LENGTH_SHORT)
+						snackbar?.show()
+					}
+				}
+			})
+			return@setOnPreferenceClickListener true
+		}
 	}
 
 	companion object {