/*
 * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 *
 * 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 net.micode.notes.ui;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;


public class AlarmInitReceiver extends BroadcastReceiver {// AlarmInitReceiver类继承自BroadcastReceiver类


    private static final String [] PROJECTION = new String [] {// 定义一个字符串数组PROJECTION
        NoteColumns.ID,// 第一个元素为NoteColumns.ID
        NoteColumns.ALERTED_DATE// 第二个元素为NoteColumns.ALERTED_DATE
    };

    private static final int COLUMN_ID                = 0; // 定义一个整型变量COLUMN_ID，值为0
    private static final int COLUMN_ALERTED_DATE      = 1;// 定义一个整型变量COLUMN_ALERTED_DATE，值为1


    @Override
    public void onReceive(Context context, Intent intent) {// 接收广播的方法
        long currentDate = System.currentTimeMillis(); // 获取当前时间戳
        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,// 通过内容提供器查询数据库
                PROJECTION,// 查询的列
                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,// 查询条件
                new String[] { String.valueOf(currentDate) },// 查询参数
                null); // 排序方式

        if (c != null) {// 如果查询结果不为空
            if (c.moveToFirst()) {// 将游标移动到第一行
                do {// 循环遍历游标
                    long alertDate = c.getLong(COLUMN_ALERTED_DATE); // 获取提醒时间
                    Intent sender = new Intent(context, AlarmReceiver.class);// 创建一个新的意图
                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));// 设置意图的数据
                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);// 创建一个用于启动广播的PendingIntent
                    AlarmManager alermManager = (AlarmManager) context// 获取AlarmManager服务
                            .getSystemService(Context.ALARM_SERVICE);// 设置定时器
                    alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);// 移动游标到下一行
                } while (c.moveToNext());// 关闭游标
            }
            c.close();
        }
    }
}