com.teleca.jamendo.activity.BrowsePlaylistActivity.java Source code

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Here is the source code for com.teleca.jamendo.activity.BrowsePlaylistActivity.java

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/*
 * Copyright (C) 2009 Teleca Poland Sp. z o.o. <android@teleca.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.teleca.jamendo.activity;

import java.util.ArrayList;

import org.json.JSONException;

import com.teleca.jamendo.JamendoApplication;
import com.teleca.jamendo.adapter.PurpleAdapter;
import com.teleca.jamendo.adapter.PurpleEntry;
import com.teleca.jamendo.adapter.SeparatedListAdapter;
import com.teleca.jamendo.api.JamendoGet2Api;
import com.teleca.jamendo.api.Playlist;
import com.teleca.jamendo.api.PlaylistRemote;
import com.teleca.jamendo.api.WSError;
import com.teleca.jamendo.api.impl.JamendoGet2ApiImpl;
import com.teleca.jamendo.db.Database;
import com.teleca.jamendo.db.DatabaseImpl;
import com.teleca.jamendo.R;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.gesture.GestureOverlayView;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.ViewFlipper;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;

/**
 * <code>BrowsePlaylistActivity</code>
 * 
 * @author Lukasz Wisniewski
 */
public class BrowsePlaylistActivity extends Activity {

    public static final int SAVE_REQUEST_CODE = 666668;

    private Playlist mPlaylist;
    private Mode mCurrentMode;

    private SeparatedListAdapter mSeparatedAdapter;
    private GestureOverlayView mGestureOverlayView;

    /**
     * Modes in which this activity can be launched (top bar)
     */
    enum Mode {
        /**
         * Normal navigation
         */
        Normal,
        /**
         * like Normal but removes activity from the stack
         */
        Load,
        /**
         * Save button at the top bar
         */
        Save
    }

    /**
     * Launch this Activity from the outside
     *
     * @param c
     */
    public static void launch(Context c, Mode mode) {
        Intent intent = new Intent(c, BrowsePlaylistActivity.class);
        intent.putExtra("mode", mode);
        c.startActivity(intent);
    }

    /**
     * Save playlist, launch as a subActivity
     * 
     * @param a
     * @param playlist
     */
    public static void launchSave(Activity a, Playlist playlist) {
        Intent intent = new Intent(a, BrowsePlaylistActivity.class);
        intent.putExtra("mode", Mode.Save);
        intent.putExtra("playlist", playlist);
        a.startActivityForResult(intent, SAVE_REQUEST_CODE);
    }

    // layout
    private ListView mPlaylistsListView;
    private Button mButton;
    private EditText mEditText;
    private ViewFlipper mViewFlipper;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.browse_playlist);

        mPlaylistsListView = (ListView) findViewById(R.id.PlaylistsListView);
        mPlaylistsListView.setOnItemLongClickListener(mItemLongClick);
        mButton = (Button) findViewById(R.id.BrowseButton);
        mEditText = (EditText) findViewById(R.id.BrowseEditText);
        mViewFlipper = (ViewFlipper) findViewById(R.id.BrowsePlaylistViewFlipper);

        setupMode((Mode) getIntent().getSerializableExtra("mode"));

        mGestureOverlayView = (GestureOverlayView) findViewById(R.id.gestures);
        mGestureOverlayView
                .addOnGesturePerformedListener(JamendoApplication.getInstance().getPlayerGestureHandler());
    }

    @Override
    protected void onResume() {
        super.onResume();
        boolean gesturesEnabled = PreferenceManager.getDefaultSharedPreferences(this).getBoolean("gestures", true);
        mGestureOverlayView.setEnabled(gesturesEnabled);
    }

    /**
     * Save playlist (actually overwrite one selected from the ListView)
     */
    private OnItemClickListener mSaveListListener = new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int index, long time) {
            PurpleEntry entry = (PurpleEntry) adapterView.getAdapter().getItem(index);
            String playlistName = entry.getText();
            savePlaylist(playlistName);
        }
    };

    /**
     * Load playlist (normal or load mode)
     */
    private OnItemClickListener mLoadListListener = new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int index, long time) {
            PurpleEntry entry = (PurpleEntry) adapterView.getAdapter().getItem(index);
            if (entry instanceof PlaylistPurpleEntry) {
                // load from server
                PlaylistActivity.launch(BrowsePlaylistActivity.this,
                        ((PlaylistPurpleEntry) entry).getPlaylistRemote());
            } else {
                String playlistName = entry.getText();
                Playlist playlist = new DatabaseImpl(BrowsePlaylistActivity.this).loadPlaylist(playlistName);
                JamendoApplication.getInstance().getPlayerEngineInterface().openPlaylist(playlist);
                JamendoApplication.getInstance().getPlayerEngineInterface().stop();
                // leave the activity on the stack
                if (mCurrentMode == Mode.Normal) {
                    PlaylistActivity.launch(BrowsePlaylistActivity.this, false);
                }
            }

            // remove activity from the stack
            if (mCurrentMode == Mode.Load) {
                finish();
            }
        }

    };

    /**
     * Long press on list, remove playlist, ask for confirmation before
     */
    private OnItemLongClickListener mItemLongClick = new OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(AdapterView<?> adapterView, View arg1, int position, long arg3) {
            PurpleEntry entry = (PurpleEntry) adapterView.getAdapter().getItem(position);
            mPlaylistName = entry.getText();
            showDialog(DELETE_YES_NO_MESSAGE);
            return true;
        }

    };

    /**
     * Saves playlist
     */
    private OnClickListener mSaveButtonListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            savePlaylist(mEditText.getText().toString());
        }

    };

    /**
     * Creates new playlist
     */
    private OnClickListener mNewButtonListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            String playlistName = mEditText.getText().toString();

            if (playlistName.length() == 0 || playlistName.startsWith(" "))
                return;

            Database db = new DatabaseImpl(BrowsePlaylistActivity.this);

            if (db.loadPlaylist(playlistName) != null) {
                Toast.makeText(BrowsePlaylistActivity.this, R.string.playlist_exists, Toast.LENGTH_SHORT).show();
                return;
            }

            Playlist playlist = new Playlist();
            db.savePlaylist(playlist, playlistName);
            loadPlaylists();
        }

    };

    /**
     * Apply mode to the view
     * 
     * @param mode
     */
    private void setupMode(Mode mode) {
        this.mCurrentMode = mode;

        if (mCurrentMode == Mode.Save) {
            mPlaylist = (Playlist) getIntent().getSerializableExtra("playlist");
            mButton.setText(R.string.save);
            mButton.setOnClickListener(mSaveButtonListener);
            mPlaylistsListView.setOnItemClickListener(mSaveListListener);
        }

        if (mCurrentMode == Mode.Load) {
            mButton.setText(R.string.load);
            mPlaylistsListView.setOnItemClickListener(mLoadListListener);
        }

        if (mCurrentMode == Mode.Normal) {
            mButton.setText(R.string.neew);
            mButton.setOnClickListener(mNewButtonListener);
            mPlaylistsListView.setOnItemClickListener(mLoadListListener);
        }

        loadPlaylists();
    }

    /**
     * Loads available playlists from database to the list view
     */
    private void loadPlaylists() {
        PurpleAdapter purpleAdapter = new PurpleAdapter(this);
        ArrayList<PurpleEntry> list = new ArrayList<PurpleEntry>();

        ArrayList<String> playlists = new DatabaseImpl(this).getAvailablePlaylists();

        for (String playlistName : playlists) {
            PurpleEntry entry = new PurpleEntry(null, playlistName);
            list.add(entry);
        }
        purpleAdapter.setList(list);

        // check if we have personalized client
        String userName = PreferenceManager.getDefaultSharedPreferences(this).getString("user_name", null);

        if (mCurrentMode.equals(Mode.Save) || userName == null || userName.length() == 0) {
            mPlaylistsListView.setAdapter(purpleAdapter);
        } else {
            mSeparatedAdapter = new SeparatedListAdapter(this);
            mSeparatedAdapter.addSection("Playlists on the phone", purpleAdapter);
            mPlaylistsListView.setAdapter(mSeparatedAdapter);
            new RemotePlaylistTask().execute(userName);
        }
        setupListView();
    }

    /**
     * Saves playlist to the database and quits the activity
     * 
     * @param playlistName
     */
    private void savePlaylist(String playlistName) {
        Database db = new DatabaseImpl(this);
        if (db.playlistExists(playlistName)) {
            mPlaylistName = playlistName;
            showDialog(OVERWRITE_YES_NO_MESSAGE);
        } else {
            db.savePlaylist(mPlaylist, playlistName);
            setResult(RESULT_OK, null);
            finish();
        }
    }

    private String mPlaylistName;
    private static final int OVERWRITE_YES_NO_MESSAGE = 667;
    private static final int DELETE_YES_NO_MESSAGE = 668;

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {

        case OVERWRITE_YES_NO_MESSAGE:
            return new AlertDialog.Builder(this).setTitle(R.string.overwrite_playlist_q)
                    .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {

                            // User clicked OK, overwrite the playlist
                            Database db = new DatabaseImpl(BrowsePlaylistActivity.this);
                            db.savePlaylist(mPlaylist, mPlaylistName);
                            setResult(RESULT_OK, null);
                            finish();
                        }
                    }).setNegativeButton(R.string.cancel, null).create();
        case DELETE_YES_NO_MESSAGE:
            return new AlertDialog.Builder(this).setTitle(R.string.delete_playlist_q)
                    .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {

                            // User clicked OK, delete the playlist
                            Database db = new DatabaseImpl(BrowsePlaylistActivity.this);
                            db.deletePlaylist(mPlaylistName);
                            loadPlaylists();
                        }
                    }).setNegativeButton(R.string.cancel, null).create();

        default:
            return null;
        }
    }

    private void setupListView() {
        if (mPlaylistsListView.getCount() > 0) {
            mViewFlipper.setDisplayedChild(0);
        } else {
            mViewFlipper.setDisplayedChild(1);
        }
    }

    public class RemotePlaylistTask extends AsyncTask<String, WSError, PlaylistRemote[]> {

        String mUserName;

        @Override
        protected PlaylistRemote[] doInBackground(String... params) {
            String userName = params[0];
            JamendoGet2Api service = new JamendoGet2ApiImpl();
            mUserName = userName;
            try {
                return service.getUserPlaylist(userName);
            } catch (JSONException e) {
                return null;
            } catch (WSError e) {
                publishProgress(e);
                return null;
            }
        }

        @Override
        protected void onPostExecute(PlaylistRemote[] result) {
            super.onPostExecute(result);

            if (result == null || result.length == 0)
                return;

            ArrayList<PurpleEntry> list = new ArrayList<PurpleEntry>();

            for (int i = 0; i < result.length; i++) {
                PlaylistPurpleEntry entry = new PlaylistPurpleEntry(null, result[i].getName());
                entry.setPlaylistRemote(result[i]);
                list.add(entry);
            }

            PurpleAdapter remotePlaylistAdapter = new PurpleAdapter(BrowsePlaylistActivity.this);
            remotePlaylistAdapter.setList(list);
            mPlaylistsListView.setAdapter(null);
            mSeparatedAdapter.addSection("Playlists on the server", remotePlaylistAdapter);
            //mSeparatedAdapter.notifyDataSetChanged();
            mPlaylistsListView.setAdapter(mSeparatedAdapter);
        }

        @Override
        protected void onProgressUpdate(WSError... values) {
            Toast.makeText(BrowsePlaylistActivity.this, values[0].getMessage(), Toast.LENGTH_LONG).show();
            super.onProgressUpdate(values);
        }

    }

    private class PlaylistPurpleEntry extends PurpleEntry {

        private PlaylistRemote mPlaylistRemote;

        public PlaylistPurpleEntry(Integer drawable, String text) {
            super(drawable, text);
        }

        public void setPlaylistRemote(PlaylistRemote mPlaylistRemote) {
            this.mPlaylistRemote = mPlaylistRemote;
        }

        public PlaylistRemote getPlaylistRemote() {
            return mPlaylistRemote;
        }

    }

}