1/*
2 * Copyright (C) 2012 Google Inc.
3 * Licensed to The Android Open Source Project.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mail.ui;
19
20import android.app.AlertDialog;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.content.DialogInterface.OnClickListener;
24import android.content.DialogInterface.OnDismissListener;
25import android.os.AsyncTask;
26import android.view.View;
27import android.widget.AdapterView;
28
29import com.android.mail.R;
30import com.android.mail.providers.Account;
31import com.android.mail.providers.Conversation;
32import com.android.mail.providers.Folder;
33import com.android.mail.providers.UIProvider;
34import com.android.mail.utils.LogTag;
35import com.android.mail.utils.LogUtils;
36
37import java.util.Collection;
38
39public abstract class FolderSelectionDialog implements OnClickListener, OnDismissListener {
40    protected static final String LOG_TAG = LogTag.getLogTag();
41    private static boolean sDialogShown;
42
43    protected AlertDialog mDialog;
44    protected final ConversationUpdater mUpdater;
45    protected final SeparatedFolderListAdapter mAdapter;
46    protected final Collection<Conversation> mTarget;
47    protected final boolean mBatch;
48    protected final QueryRunner mRunner;
49    protected final Account mAccount;
50    protected final AlertDialog.Builder mBuilder;
51    protected final Folder mCurrentFolder;
52
53    public static FolderSelectionDialog getInstance(final Context context, final Account account,
54            final ConversationUpdater updater, final Collection<Conversation> target,
55            final boolean isBatch, final Folder currentFolder, final boolean isMoveTo) {
56        if (sDialogShown) {
57            return null;
58        }
59
60        /*
61         * TODO: This method should only be called with isMoveTo=true if this capability is not
62         * present on the account, so we should be able to remove the check here.
63         */
64        if (isMoveTo || !account.supportsCapability(
65                UIProvider.AccountCapabilities.MULTIPLE_FOLDERS_PER_CONV)) {
66            return new SingleFolderSelectionDialog(
67                    context, account, updater, target, isBatch, currentFolder);
68        } else {
69            return new MultiFoldersSelectionDialog(
70                    context, account, updater, target, isBatch, currentFolder);
71        }
72    }
73
74    public static void setDialogDismissed() {
75        LogUtils.d(LOG_TAG, "Folder Selection dialog dismissed");
76        sDialogShown = false;
77    }
78
79    // TODO: use a loader instead
80    @Deprecated
81    protected abstract void updateAdapterInBackground(Context context);
82
83    protected abstract void onListItemClick(int position);
84
85    protected FolderSelectionDialog(final Context context, final Account account,
86            final ConversationUpdater updater, final Collection<Conversation> target,
87            final boolean isBatch, final Folder currentFolder) {
88        mUpdater = updater;
89        mTarget = target;
90        mBatch = isBatch;
91
92        final AlertDialog.Builder builder = new AlertDialog.Builder(context);
93        builder.setNegativeButton(R.string.cancel, this);
94        mAccount = account;
95        mBuilder = builder;
96        mCurrentFolder = currentFolder;
97        mAdapter = new SeparatedFolderListAdapter();
98        mRunner = new QueryRunner(context);
99    }
100
101    public void show() {
102        sDialogShown = true;
103        // TODO: use a loader instead
104        mRunner.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
105    }
106
107    protected void showInternal() {
108        mDialog.show();
109        mDialog.setOnDismissListener(this);
110        mDialog.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
111                @Override
112            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
113                onListItemClick(position);
114            }
115        });
116    }
117
118    @Override
119    public void onDismiss(DialogInterface dialog) {
120        FolderSelectionDialog.setDialogDismissed();
121    }
122
123    /**
124     * Class to query the Folder list database in the background and update the
125     * adapter with an open cursor.
126     */
127    // TODO: use a loader instead
128    @Deprecated
129    private class QueryRunner extends AsyncTask<Void, Void, Void> {
130        private final Context mContext;
131
132        private QueryRunner(final Context context) {
133            mContext = context;
134        }
135
136        @Override
137        protected Void doInBackground(Void... v) {
138            updateAdapterInBackground(mContext);
139            return null;
140        }
141
142        @Override
143        protected void onPostExecute(Void v) {
144            mDialog = mBuilder.create();
145            showInternal();
146        }
147    }
148}
149