1/*
2 * Copyright (C) 2015 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.messaging.datamodel.data;
18
19import android.app.LoaderManager;
20import android.content.Context;
21import android.content.Loader;
22import android.database.Cursor;
23import android.os.Bundle;
24import android.support.annotation.Nullable;
25
26import com.android.messaging.datamodel.BoundCursorLoader;
27import com.android.messaging.datamodel.GalleryBoundCursorLoader;
28import com.android.messaging.datamodel.binding.BindableData;
29import com.android.messaging.datamodel.binding.BindingBase;
30import com.android.messaging.util.Assert;
31import com.android.messaging.util.BuglePrefs;
32import com.android.messaging.util.BuglePrefsKeys;
33import com.android.messaging.util.LogUtil;
34
35/**
36 * Services data needs for MediaPicker.
37 */
38public class MediaPickerData extends BindableData {
39    public interface MediaPickerDataListener {
40        void onMediaPickerDataUpdated(MediaPickerData mediaPickerData, Object data, int loaderId);
41    }
42
43    private static final String BINDING_ID = "bindingId";
44    private final Context mContext;
45    private LoaderManager mLoaderManager;
46    private final GalleryLoaderCallbacks mGalleryLoaderCallbacks;
47    private MediaPickerDataListener mListener;
48
49    public MediaPickerData(final Context context) {
50        mContext = context;
51        mGalleryLoaderCallbacks = new GalleryLoaderCallbacks();
52    }
53
54    public static final int GALLERY_IMAGE_LOADER = 1;
55
56    /**
57     * A trampoline class so that we can inherit from LoaderManager.LoaderCallbacks multiple times.
58     */
59    private class GalleryLoaderCallbacks implements LoaderManager.LoaderCallbacks<Cursor> {
60        @Override
61        public Loader<Cursor> onCreateLoader(final int id, final Bundle args) {
62            final String bindingId = args.getString(BINDING_ID);
63            // Check if data still bound to the requesting ui element
64            if (isBound(bindingId)) {
65                switch (id) {
66                    case GALLERY_IMAGE_LOADER:
67                        return new GalleryBoundCursorLoader(bindingId, mContext);
68
69                    default:
70                        Assert.fail("Unknown loader id for gallery picker!");
71                        break;
72                }
73            } else {
74                LogUtil.w(LogUtil.BUGLE_TAG, "Loader created after unbinding the media picker");
75            }
76            return null;
77        }
78
79        /**
80         * {@inheritDoc}
81         */
82        @Override
83        public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) {
84            final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader;
85            if (isBound(cursorLoader.getBindingId())) {
86                switch (loader.getId()) {
87                    case GALLERY_IMAGE_LOADER:
88                        mListener.onMediaPickerDataUpdated(MediaPickerData.this, data,
89                                GALLERY_IMAGE_LOADER);
90                        break;
91
92                    default:
93                        Assert.fail("Unknown loader id for gallery picker!");
94                        break;
95                }
96            } else {
97                LogUtil.w(LogUtil.BUGLE_TAG, "Loader finished after unbinding the media picker");
98            }
99        }
100
101        /**
102         * {@inheritDoc}
103         */
104        @Override
105        public void onLoaderReset(final Loader<Cursor> loader) {
106            final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader;
107            if (isBound(cursorLoader.getBindingId())) {
108                switch (loader.getId()) {
109                    case GALLERY_IMAGE_LOADER:
110                        mListener.onMediaPickerDataUpdated(MediaPickerData.this, null,
111                                GALLERY_IMAGE_LOADER);
112                        break;
113
114                    default:
115                        Assert.fail("Unknown loader id for media picker!");
116                        break;
117                }
118            } else {
119                LogUtil.w(LogUtil.BUGLE_TAG, "Loader reset after unbinding the media picker");
120            }
121        }
122    }
123
124
125
126    public void startLoader(final int loaderId, final BindingBase<MediaPickerData> binding,
127            @Nullable Bundle args, final MediaPickerDataListener listener) {
128        if (args == null) {
129            args = new Bundle();
130        }
131        args.putString(BINDING_ID, binding.getBindingId());
132        if (loaderId == GALLERY_IMAGE_LOADER) {
133            mLoaderManager.initLoader(loaderId, args, mGalleryLoaderCallbacks).forceLoad();
134        } else {
135            Assert.fail("Unsupported loader id for media picker!");
136        }
137        mListener = listener;
138    }
139
140    public void destroyLoader(final int loaderId) {
141        mLoaderManager.destroyLoader(loaderId);
142    }
143
144    public void init(final LoaderManager loaderManager) {
145        mLoaderManager = loaderManager;
146    }
147
148    @Override
149    protected void unregisterListeners() {
150        // This could be null if we bind but the caller doesn't init the BindableData
151        if (mLoaderManager != null) {
152            mLoaderManager.destroyLoader(GALLERY_IMAGE_LOADER);
153            mLoaderManager = null;
154        }
155    }
156
157    /**
158     * Gets the last selected chooser index, or -1 if no selection has been saved.
159     */
160    public int getSelectedChooserIndex() {
161        return BuglePrefs.getApplicationPrefs().getInt(
162                BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX,
163                BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX_DEFAULT);
164    }
165
166    /**
167     * Saves the selected media chooser index.
168     * @param selectedIndex the selected media chooser index.
169     */
170    public void saveSelectedChooserIndex(final int selectedIndex) {
171        BuglePrefs.getApplicationPrefs().putInt(BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX,
172                selectedIndex);
173    }
174
175}