1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.music;
18
19import android.app.Activity;
20import android.content.ContentResolver;
21import android.content.ContentUris;
22import android.content.ContentValues;
23import android.content.Intent;
24import android.database.Cursor;
25import android.media.AudioManager;
26import android.net.Uri;
27import android.os.Bundle;
28import android.provider.MediaStore;
29import android.text.Editable;
30import android.text.TextWatcher;
31import android.view.View;
32import android.view.Window;
33import android.view.WindowManager;
34import android.widget.Button;
35import android.widget.EditText;
36import android.widget.TextView;
37
38public class CreatePlaylist extends Activity {
39    private EditText mPlaylist;
40    private TextView mPrompt;
41    private Button mSaveButton;
42
43    @Override
44    public void onCreate(Bundle icicle) {
45        super.onCreate(icicle);
46        setVolumeControlStream(AudioManager.STREAM_MUSIC);
47
48        requestWindowFeature(Window.FEATURE_NO_TITLE);
49        setContentView(R.layout.create_playlist);
50        getWindow().setLayout(
51                WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
52
53        mPrompt = (TextView) findViewById(R.id.prompt);
54        mPlaylist = (EditText) findViewById(R.id.playlist);
55        mSaveButton = (Button) findViewById(R.id.create);
56        mSaveButton.setOnClickListener(mOpenClicked);
57
58        ((Button) findViewById(R.id.cancel)).setOnClickListener(new View.OnClickListener() {
59            public void onClick(View v) {
60                finish();
61            }
62        });
63
64        String defaultname = icicle != null ? icicle.getString("defaultname") : makePlaylistName();
65        if (defaultname == null) {
66            finish();
67            return;
68        }
69        String promptformat = getString(R.string.create_playlist_create_text_prompt);
70        String prompt = String.format(promptformat, defaultname);
71        mPrompt.setText(prompt);
72        mPlaylist.setText(defaultname);
73        mPlaylist.setSelection(defaultname.length());
74        mPlaylist.addTextChangedListener(mTextWatcher);
75    }
76
77    TextWatcher mTextWatcher = new TextWatcher() {
78        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
79            // don't care about this one
80        }
81        public void onTextChanged(CharSequence s, int start, int before, int count) {
82            String newText = mPlaylist.getText().toString();
83            if (newText.trim().length() == 0) {
84                mSaveButton.setEnabled(false);
85            } else {
86                mSaveButton.setEnabled(true);
87                // check if playlist with current name exists already, and warn the user if so.
88                if (idForplaylist(newText) >= 0) {
89                    mSaveButton.setText(R.string.create_playlist_overwrite_text);
90                } else {
91                    mSaveButton.setText(R.string.create_playlist_create_text);
92                }
93            }
94        };
95        public void afterTextChanged(Editable s) {
96            // don't care about this one
97        }
98    };
99
100    private int idForplaylist(String name) {
101        Cursor c = MusicUtils.query(this, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
102                new String[] {MediaStore.Audio.Playlists._ID},
103                MediaStore.Audio.Playlists.NAME + "=?", new String[] {name},
104                MediaStore.Audio.Playlists.NAME);
105        int id = -1;
106        if (c != null) {
107            c.moveToFirst();
108            if (!c.isAfterLast()) {
109                id = c.getInt(0);
110            }
111            c.close();
112        }
113        return id;
114    }
115
116    @Override
117    public void onSaveInstanceState(Bundle outcicle) {
118        outcicle.putString("defaultname", mPlaylist.getText().toString());
119    }
120
121    @Override
122    public void onResume() {
123        super.onResume();
124    }
125
126    private String makePlaylistName() {
127        String template = getString(R.string.new_playlist_name_template);
128        int num = 1;
129
130        String[] cols = new String[] {MediaStore.Audio.Playlists.NAME};
131        ContentResolver resolver = getContentResolver();
132        String whereclause = MediaStore.Audio.Playlists.NAME + " != ''";
133        Cursor c = resolver.query(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, cols,
134                whereclause, null, MediaStore.Audio.Playlists.NAME);
135
136        if (c == null) {
137            return null;
138        }
139
140        String suggestedname;
141        suggestedname = String.format(template, num++);
142
143        // Need to loop until we've made 1 full pass through without finding a match.
144        // Looping more than once shouldn't happen very often, but will happen if
145        // you have playlists named "New Playlist 1"/10/2/3/4/5/6/7/8/9, where
146        // making only one pass would result in "New Playlist 10" being erroneously
147        // picked for the new name.
148        boolean done = false;
149        while (!done) {
150            done = true;
151            c.moveToFirst();
152            while (!c.isAfterLast()) {
153                String playlistname = c.getString(0);
154                if (playlistname.compareToIgnoreCase(suggestedname) == 0) {
155                    suggestedname = String.format(template, num++);
156                    done = false;
157                }
158                c.moveToNext();
159            }
160        }
161        c.close();
162        return suggestedname;
163    }
164
165    private View.OnClickListener mOpenClicked = new View.OnClickListener() {
166        public void onClick(View v) {
167            String name = mPlaylist.getText().toString();
168            if (name != null && name.length() > 0) {
169                ContentResolver resolver = getContentResolver();
170                int id = idForplaylist(name);
171                Uri uri;
172                if (id >= 0) {
173                    uri = ContentUris.withAppendedId(
174                            MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, id);
175                    MusicUtils.clearPlaylist(CreatePlaylist.this, id);
176                } else {
177                    ContentValues values = new ContentValues(1);
178                    values.put(MediaStore.Audio.Playlists.NAME, name);
179                    uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values);
180                }
181                setResult(RESULT_OK, (new Intent()).setData(uri));
182                finish();
183            }
184        }
185    };
186}
187