/*
 * 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.gtask.data;

import android.database.Cursor;
import android.util.Log;
import net.micode.notes.tool.GTaskStringUtils;
import org.json.JSONException;
import org.json.JSONObject;

// MetaData类继承自Task类，用于处理与任务相关的元数据
public class MetaData extends Task {
    // 用于日志记录的标签，简化类名获取
    private final static String TAG = MetaData.class.getSimpleName();
    // 存储相关任务的GID（全局唯一标识符）
    private String mRelatedGid = null;

    // 设置元数据，将给定的GID和元数据信息存储为JSON格式的字符串
    public void setMeta(String gid, JSONObject metaInfo) {
        try {
            // 将GID添加到元数据信息的JSON对象中
            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
        } catch (JSONException e) {
            // 如果添加GID失败，记录错误日志
            Log.e(TAG, "failed to put related gid");
        }
        // 将元数据信息转换为字符串并设置为笔记内容
        setNotes(metaInfo.toString());
        // 设置任务名称为特定的元数据笔记名称
        setName(GTaskStringUtils.META_NOTE_NAME);
    }

    // 获取相关任务的GID
    public String getRelatedGid() {
        return mRelatedGid;
    }

    // 判断元数据是否值得保存，即笔记内容不为空
    @Override
    public boolean isWorthSaving() {
        return getNotes()!= null;
    }

    // 根据远程JSON数据设置内容，同时从笔记内容中解析出相关任务的GID
    @Override
    public void setContentByRemoteJSON(JSONObject js) {
        super.setContentByRemoteJSON(js);
        if (getNotes()!= null) {
            try {
                // 将笔记内容解析为JSON对象
                JSONObject metaInfo = new JSONObject(getNotes().trim());
                // 从JSON对象中获取相关任务的GID
                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
            } catch (JSONException e) {
                // 如果获取GID失败，记录警告日志并将GID设置为null
                Log.w(TAG, "failed to get related gid");
                mRelatedGid = null;
            }
        }
    }

    // 此方法不应被调用，抛出非法访问错误
    @Override
    public void setContentByLocalJSON(JSONObject js) {
        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
    }

    // 此方法不应被调用，抛出非法访问错误
    @Override
    public JSONObject getLocalJSONFromContent() {
        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
    }

    // 此方法不应被调用，抛出非法访问错误
    @Override
    public int getSyncAction(Cursor c) {
        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
    }
}