/*
 * 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.
 */
//提醒关于许可证使用的相关问题
package net.micode.notes.ui;

import android.app.AlarmManager;//引入闹钟提醒包
import android.app.PendingIntent;
import android.content.BroadcastReceiver;//监听开机广播
import android.content.ContentUris;//内容链接
import android.content.Context;//文本
import android.content.Intent;
import android.database.Cursor;//目的和光标

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;//便签栏


public class AlarmInitReceiver extends BroadcastReceiver {//实现接受闹铃启动消息的功能

    private static final String [] PROJECTION = new String [] {//声明PROJECTION，每个元素包括id和提醒日期
        NoteColumns.ID,
        NoteColumns.ALERTED_DATE
    };

    private static final int COLUMN_ID                = 0;
    private static final int COLUMN_ALERTED_DATE      = 1;//设定ID和闹钟信息的初始值

    @Override
    public void onReceive(Context context, Intent intent) {//接收广播后的处理过程
        long currentDate = System.currentTimeMillis();//通过系统函数获了当前时间，存入currentDate变量。
        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,//通过查找数据库中的标签内容，找到和当前系统时间相等的标签
                PROJECTION,
                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,//获取的时间如果大于设置的时间的提醒项目
                new String[] { String.valueOf(currentDate) },
                null);//类型转换，将long类型的currentDate转变为String类

        if (c != null) {
            if (c.moveToFirst()) {//游标移动到开始位置
                do {
                    long alertDate = c.getLong(COLUMN_ALERTED_DATE);//获取要提醒的日期
                    Intent sender = new Intent(context, AlarmReceiver.class);//新建一个intent类来指向alarmreceiver 来传输数据
                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));//设置数据为便签的uri和id
                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);//创建一个广播组件，可以在手机广播栏显示相应内容
                    AlarmManager alermManager = (AlarmManager) context//新建系统的闹钟服务
                            .getSystemService(Context.ALARM_SERVICE);
                    alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);//设置一系列需要传输的数据
                } while (c.moveToNext());//游标移动到下一位置
            }
            c.close();//关闭游标
        }
    }
}