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.net.Uri;
24import android.os.Bundle;
25
26import com.android.messaging.datamodel.BoundCursorLoader;
27import com.android.messaging.datamodel.DatabaseHelper.ParticipantColumns;
28import com.android.messaging.datamodel.MessagingContentProvider;
29import com.android.messaging.datamodel.binding.BindableData;
30import com.android.messaging.datamodel.binding.BindingBase;
31import com.android.messaging.util.Assert;
32
33/**
34 * Services data needs for BlockedParticipantsFragment
35 */
36public class BlockedParticipantsData extends BindableData implements
37        LoaderManager.LoaderCallbacks<Cursor> {
38    public interface BlockedParticipantsDataListener {
39        public void onBlockedParticipantsCursorUpdated(final Cursor cursor);
40    }
41    private static final String BINDING_ID = "bindingId";
42    private static final int BLOCKED_PARTICIPANTS_LOADER = 1;
43    private final Context mContext;
44    private LoaderManager mLoaderManager;
45    private BlockedParticipantsDataListener mListener;
46
47    public BlockedParticipantsData(final Context context,
48            final BlockedParticipantsDataListener listener) {
49        mContext = context;
50        mListener = listener;
51    }
52
53    @Override
54    public Loader<Cursor> onCreateLoader(final int id, final Bundle args) {
55        Assert.isTrue(id == BLOCKED_PARTICIPANTS_LOADER);
56        final String bindingId = args.getString(BINDING_ID);
57        // Check if data still bound to the requesting ui element
58        if (isBound(bindingId)) {
59            final Uri uri = MessagingContentProvider.PARTICIPANTS_URI;
60            return new BoundCursorLoader(bindingId, mContext, uri,
61                    ParticipantData.ParticipantsQuery.PROJECTION,
62                    ParticipantColumns.BLOCKED + "=1", null, null);
63        }
64        return null;
65    }
66
67    @Override
68    public void onLoadFinished(final Loader<Cursor> loader, final Cursor cursor) {
69        Assert.isTrue(loader.getId() == BLOCKED_PARTICIPANTS_LOADER);
70        final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader;
71        Assert.isTrue(isBound(cursorLoader.getBindingId()));
72        mListener.onBlockedParticipantsCursorUpdated(cursor);
73    }
74
75    @Override
76    public void onLoaderReset(final Loader<Cursor> loader) {
77        Assert.isTrue(loader.getId() == BLOCKED_PARTICIPANTS_LOADER);
78        final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader;
79        Assert.isTrue(isBound(cursorLoader.getBindingId()));
80        mListener.onBlockedParticipantsCursorUpdated(null);
81    }
82
83    public void init(final LoaderManager loaderManager,
84            final BindingBase<BlockedParticipantsData> binding) {
85        final Bundle args = new Bundle();
86        args.putString(BINDING_ID, binding.getBindingId());
87        mLoaderManager = loaderManager;
88        mLoaderManager.initLoader(BLOCKED_PARTICIPANTS_LOADER, args, this);
89    }
90
91    @Override
92    protected void unregisterListeners() {
93        mListener = null;
94        if (mLoaderManager != null) {
95            mLoaderManager.destroyLoader(BLOCKED_PARTICIPANTS_LOADER);
96            mLoaderManager = null;
97        }
98    }
99
100    public ParticipantListItemData createParticipantListItemData(Cursor cursor) {
101        return new ParticipantListItemData(ParticipantData.getFromCursor(cursor));
102    }
103}
104