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GTaskManager.java
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/*
* 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.remote;
// 导入所需的Android类和自定义类
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.util.Log;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.gtask.data.MetaData;
import net.micode.notes.gtask.data.Node;
import net.micode.notes.gtask.data.SqlNote;
import net.micode.notes.gtask.data.Task;
import net.micode.notes.gtask.data.TaskList;
import net.micode.notes.gtask.exception.ActionFailureException;
import net.micode.notes.gtask.exception.NetworkFailureException;
import net.micode.notes.tool.DataUtils;
import net.micode.notes.tool.GTaskStringUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
// GTaskManager类用于管理与Google Tasks的同步操作
public class GTaskManager {
// 定义日志标签
private static final String TAG = GTaskManager.class.getSimpleName();
// 定义同步状态常量
public static final int STATE_SUCCESS = 0;
public static final int STATE_NETWORK_ERROR = 1;
public static final int STATE_INTERNAL_ERROR = 2;
public static final int STATE_SYNC_IN_PROGRESS = 3;
public static final int STATE_SYNC_CANCELLED = 4;
// 单例模式，GTaskManager的实例
private static GTaskManager mInstance = null;
// Activity和Context引用，用于访问Android系统服务
private Activity mActivity;
private Context mContext;
// ContentResolver用于访问和修改内容提供者中的数据
private ContentResolver mContentResolver;
// 同步状态标志
private boolean mSyncing;
private boolean mCancelled;
// 用于存储任务列表、任务和元数据的哈希映射
private HashMap<String, TaskList> mGTaskListHashMap;
private HashMap<String, Node> mGTaskHashMap;
private HashMap<String, MetaData> mMetaHashMap;
// 元数据列表
private TaskList mMetaList;
// 本地删除ID映射
private HashSet<Long> mLocalDeleteIdMap;
// GID到NID的映射
private HashMap<String, Long> mGidToNid;
// NID到GID的映射
private HashMap<Long, String> mNidToGid;
// 私有构造函数，确保单例模式
private GTaskManager() {
mSyncing = false;
mCancelled = false;
mGTaskListHashMap = new HashMap<String, TaskList>();
mGTaskHashMap = new HashMap<String, Node>();
mMetaHashMap = new HashMap<String, MetaData>();
mMetaList = null;
mLocalDeleteIdMap = new HashSet<Long>();
mGidToNid = new HashMap<String, Long>();
mNidToGid = new HashMap<Long, String>();
}
// 获取GTaskManager的实例
public static synchronized GTaskManager getInstance() {
if (mInstance == null) {
mInstance = new GTaskManager();
}
return mInstance;
}
// 设置Activity上下文
public synchronized void setActivityContext(Activity activity) {
// 用于获取授权令牌
mActivity = activity;
}
// 同步方法，接受上下文和异步任务参数
public int sync(Context context, GTaskASyncTask asyncTask) {
// 如果正在同步，则返回状态码
if (mSyncing) {
Log.d(TAG, "Sync is in progress");
return STATE_SYNC_IN_PROGRESS;
}
mContext = context;
mContentResolver = mContext.getContentResolver();
mSyncing = true;
mCancelled = false;
// 清空哈希映射和集合
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
try {
// 获取GTaskClient实例
GTaskClient client = GTaskClient.getInstance();
client.resetUpdateArray();
// 登录Google Tasks
if (!mCancelled) {
if (!client.login(mActivity)) {
throw new NetworkFailureException("login google task failed");
}
}
// 从Google获取任务列表
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
initGTaskList();
// 执行内容同步工作
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
syncContent();
} catch (NetworkFailureException e) {
Log.e(TAG, e.toString());
return STATE_NETWORK_ERROR;
} catch (ActionFailureException e) {
Log.e(TAG, e.toString());
return STATE_INTERNAL_ERROR;
} catch (Exception e) {
Log.e(TAG, e.toString());
e.printStackTrace();
return STATE_INTERNAL_ERROR;
} finally {
// 清空哈希映射和集合
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
mSyncing = false;
}
// 返回同步状态
return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
}
// 初始化GTask列表
private void initGTaskList() throws NetworkFailureException {
if (mCancelled)
return;
GTaskClient client = GTaskClient.getInstance();
try {
// 获取任务列表JSON数组
JSONArray jsTaskLists = client.getTaskLists();
// 首先初始化元数据列表
mMetaList = null;
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i);
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
// 检查是否是元数据列表
if (name
.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
mMetaList = new TaskList();
mMetaList.setContentByRemoteJSON(object);
// 加载元数据
JSONArray jsMetas = client.getTaskList(gid);
for (int j = 0; j < jsMetas.length(); j++) {
object = (JSONObject) jsMetas.getJSONObject(j);
MetaData metaData = new MetaData();
metaData.setContentByRemoteJSON(object);
if (metaData.isWorthSaving()) {
mMetaList.addChildTask(metaData);
if (metaData.getGid() != null) {
mMetaHashMap.put(metaData.getRelatedGid(), metaData);
}
}
}
}
}
// 如果元数据列表不存在，则创建
if (mMetaList == null) {
mMetaList = new TaskList();
mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ GTaskStringUtils.FOLDER_META);
GTaskClient.getInstance().createTaskList(mMetaList);
}
// 初始化任务列表
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i);
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
// 检查是否是任务列表
if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
&& !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ GTaskStringUtils.FOLDER_META)) {
TaskList tasklist = new TaskList();
tasklist.setContentByRemoteJSON(object);
mGTaskListHashMap.put(gid, tasklist);
mGTaskHashMap.put(gid, tasklist);
// 加载任务
JSONArray jsTasks = client.getTaskList(gid);
for (int j = 0; j < jsTasks.length(); j++) {
object = (JSONObject) jsTasks.getJSONObject(j);
gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
Task task = new Task();
task.setContentByRemoteJSON(object);
if (task.isWorthSaving()) {
task.setMetaInfo(mMetaHashMap.get(gid));
tasklist.addChildTask(task);
mGTaskHashMap.put(gid, task);
}
}
}
}
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("initGTaskList: handing JSONObject failed");
}
}
// 私有方法，用于同步内容，可能会抛出网络故障异常
private void syncContent() throws NetworkFailureException {
int syncType; // 同步类型
Cursor c = null; // 数据库游标
String gid; // 用于存储全局ID
Node node; // 节点对象
mLocalDeleteIdMap.clear(); // 清除本地删除ID映射
if (mCancelled) {
return; // 如果取消同步，则直接返回
}
// 处理本地已删除的笔记
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type<>? AND parent_id=?)", new String[] {
String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
}, null);
if (c != null) {
while (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c);
}
mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
}
} else {
Log.w(TAG, "failed to query trash folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 首先同步文件夹
syncFolder();
// 处理数据库中存在的笔记
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type=? AND parent_id<>?)", new String[] {
String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER)
}, NoteColumns.TYPE + " DESC");
if (c != null) {
while (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
syncType = node.getSyncAction(c);
} else {
if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
// 本地添加
syncType = Node.SYNC_ACTION_ADD_REMOTE;
} else {
// 远程删除
syncType = Node.SYNC_ACTION_DEL_LOCAL;
}
}
doContentSync(syncType, node, c);
}
} else {
Log.w(TAG, "failed to query existing note in database");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理剩余项
Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, Node> entry = iter.next();
node = entry.getValue();
doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
}
// 如果没有被取消，则清除本地删除表
if (!mCancelled) {
if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) {
throw new ActionFailureException("failed to batch-delete local deleted notes");
}
}
// 如果没有被取消，则刷新本地同步ID
if (!mCancelled) {
GTaskClient.getInstance().commitUpdate();
refreshLocalSyncId();
}
}
// 私有方法，用于同步文件夹，可能会抛出网络故障异常
private void syncFolder() throws NetworkFailureException {
Cursor c = null; // 数据库游标
String gid; // 用于存储全局ID
Node node; // 节点对象
int syncType; // 同步类型
if (mCancelled) {
return; // 如果取消同步，则直接返回
}
// 处理根文件夹
try {
c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null);
if (c != null) {
c.moveToNext();
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER);
mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid);
// 对于系统文件夹，只有在必要时才更新远程名称
if (!node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT))
doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
} else {
doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
}
} else {
Log.w(TAG, "failed to query root folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理通话记录文件夹
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)",
new String[] {
String.valueOf(Notes.ID_CALL_RECORD_FOLDER)
}, null);
if (c != null) {
if (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER);
mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid);
// 对于系统文件夹，只有在必要时才更新远程名称
if (!node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ GTaskStringUtils.FOLDER_CALL_NOTE))
doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
} else {
doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
}
}
} else {
Log.w(TAG, "failed to query call note folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理本地存在的文件夹
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type=? AND parent_id<>?)", new String[] {
String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)
}, NoteColumns.TYPE + " DESC");
if (c != null) {
while (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
syncType = node.getSyncAction(c);
} else {
if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
// 本地添加
syncType = Node.SYNC_ACTION_ADD_REMOTE;
} else {
// 远程删除
syncType = Node.SYNC_ACTION_DEL_LOCAL;
}
}
doContentSync(syncType, node, c);
}
} else {
Log.w(TAG, "failed to query existing folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理远程添加的文件夹
Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, TaskList> entry = iter.next();
gid = entry.getKey();
node = entry.getValue();
if (mGTaskHashMap.containsKey(gid)) {
mGTaskHashMap.remove(gid);
doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
}
}
if (!mCancelled)
GTaskClient.getInstance().commitUpdate();
}
// 同步内容的方法，根据同步类型（syncType）、节点（node）和游标（c）执行不同的同步操作
private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {
// 如果同步被取消，则直接返回
if (mCancelled) {
return;
}
// 根据不同的同步类型执行不同的操作
MetaData meta; // 用于存储元数据
switch (syncType) {
case Node.SYNC_ACTION_ADD_LOCAL: // 本地添加节点
addLocalNode(node);
break;
case Node.SYNC_ACTION_ADD_REMOTE: // 远程添加节点
addRemoteNode(node, c);
break;
case Node.SYNC_ACTION_DEL_LOCAL: // 本地删除节点
meta = mMetaHashMap.get(c.getString(SqlNote.GTASK_ID_COLUMN)); // 获取元数据
if (meta != null) {
GTaskClient.getInstance().deleteNode(meta); // 删除节点
}
mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN)); // 添加到本地删除ID映射
break;
case Node.SYNC_ACTION_DEL_REMOTE: // 远程删除节点
meta = mMetaHashMap.get(node.getGid()); // 获取元数据
if (meta != null) {
GTaskClient.getInstance().deleteNode(meta); // 删除节点
}
GTaskClient.getInstance().deleteNode(node); // 删除节点
break;
case Node.SYNC_ACTION_UPDATE_LOCAL: // 本地更新节点
updateLocalNode(node, c);
break;
case Node.SYNC_ACTION_UPDATE_REMOTE: // 远程更新节点
updateRemoteNode(node, c);
break;
case Node.SYNC_ACTION_UPDATE_CONFLICT: // 更新冲突，目前使用本地更新
updateRemoteNode(node, c);
break;
case Node.SYNC_ACTION_NONE: // 无操作
break;
case Node.SYNC_ACTION_ERROR: // 错误处理
default:
throw new ActionFailureException("unknown sync action type"); // 抛出异常
}
}
// 本地添加节点的方法
private void addLocalNode(Node node) throws NetworkFailureException {
// 如果同步被取消，则直接返回
if (mCancelled) {
return;
}
SqlNote sqlNote; // SQL笔记对象
// 根据节点类型创建不同的SQL笔记对象
if (node instanceof TaskList) {
// 处理任务列表
if (node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) {
sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER);
} else if (node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) {
sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER);
} else {
sqlNote = new SqlNote(mContext);
sqlNote.setContent(node.getLocalJSONFromContent()); // 设置内容
sqlNote.setParentId(Notes.ID_ROOT_FOLDER); // 设置父ID
}
} else {
// 处理任务
sqlNote = new SqlNote(mContext);
JSONObject js = node.getLocalJSONFromContent();
try {
// 处理ID冲突
if (js.has(GTaskStringUtils.META_HEAD_NOTE)) {
JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
if (note.has(NoteColumns.ID)) {
long id = note.getLong(NoteColumns.ID);
if (DataUtils.existInNoteDatabase(mContentResolver, id)) {
note.remove(NoteColumns.ID);
}
}
}
if (js.has(GTaskStringUtils.META_HEAD_DATA)) {
JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
for (int i = 0; i < dataArray.length(); i++) {
JSONObject data = dataArray.getJSONObject(i);
if (data.has(DataColumns.ID)) {
long dataId = data.getLong(DataColumns.ID);
if (DataUtils.existInDataDatabase(mContentResolver, dataId)) {
data.remove(DataColumns.ID);
}
}
}
}
} catch (JSONException e) {
Log.w(TAG, e.toString());
e.printStackTrace();
}
sqlNote.setContent(js); // 设置内容
Long parentId = mGidToNid.get(((Task) node).getParent().getGid()); // 获取父ID
if (parentId == null) {
Log.e(TAG, "cannot find task's parent id locally");
throw new ActionFailureException("cannot add local node");
}
sqlNote.setParentId(parentId.longValue()); // 设置父ID
}
// 创建本地节点
sqlNote.setGtaskId(node.getGid()); // 设置GTask ID
sqlNote.commit(false); // 提交
// 更新GID-NID映射
mGidToNid.put(node.getGid(), sqlNote.getId());
mNidToGid.put(sqlNote.getId(), node.getGid());
// 更新元数据
updateRemoteMeta(node.getGid(), sqlNote);
}
// 本地更新节点的方法
private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {
// 如果同步被取消，则直接返回
if (mCancelled) {
return;
}
SqlNote sqlNote; // SQL笔记对象
// 更新本地笔记
sqlNote = new SqlNote(mContext, c);
sqlNote.setContent(node.getLocalJSONFromContent()); // 设置内容
Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid())
: new Long(Notes.ID_ROOT_FOLDER);
if (parentId == null) {
Log.e(TAG, "cannot find task's parent id locally");
throw new ActionFailureException("cannot update local node");
}
sqlNote.setParentId(parentId.longValue()); // 设置父ID
sqlNote.commit(true); // 提交
// 更新元数据信息
updateRemoteMeta(node.getGid(), sqlNote);
}
// 远程添加节点的方法
private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {
// 如果同步被取消，则直接返回
if (mCancelled) {
return;
}
SqlNote sqlNote = new SqlNote(mContext, c); // SQL笔记对象
Node n; // 节点对象
// 远程更新
if (sqlNote.isNoteType()) {
Task task = new Task(); // 任务对象
task.setContentByLocalJSON(sqlNote.getContent()); // 设置内容
String parentGid = mNidToGid.get(sqlNote.getParentId()); // 获取父GID
if (parentGid == null) {
Log.e(TAG, "cannot find task's parent tasklist");
throw new ActionFailureException("cannot add remote task");
}
mGTaskListHashMap.get(parentGid).addChildTask(task); // 添加任务到任务列表
GTaskClient.getInstance().createTask(task); // 创建任务
n = (Node) task; // 转换为节点
// 添加元数据
updateRemoteMeta(task.getGid(), sqlNote);
} else {
TaskList tasklist = null; // 任务列表对象
// 如果文件夹已存在，则跳过
String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX;
if (sqlNote.getId() == Notes.ID_ROOT_FOLDER)
folderName += GTaskStringUtils.FOLDER_DEFAULT;
else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER)
folderName += GTaskStringUtils.FOLDER_CALL_NOTE;
else
folderName += sqlNote.getSnippet();
Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, TaskList> entry = iter.next();
String gid = entry.getKey();
TaskList list = entry.getValue();
if (list.getName().equals(folderName)) {
tasklist = list;
if (mGTaskHashMap.containsKey(gid)) {
mGTaskHashMap.remove(gid);
}
break;
}
}
// 如果没有匹配，则添加
if (tasklist == null) {
tasklist = new TaskList(); // 创建任务列表
tasklist.setContentByLocalJSON(sqlNote.getContent()); // 设置内容
GTaskClient.getInstance().createTaskList(tasklist); // 创建任务列表
mGTaskListHashMap.put(tasklist.getGid(), tasklist); // 添加到映射
}
n = (Node) tasklist; // 转换为节点
}
// 更新本地笔记
sqlNote.setGtaskId(n.getGid()); // 设置GTask ID
sqlNote.commit(false); // 提交
sqlNote.resetLocalModified(); // 重置本地修改标志
sqlNote.commit(true); // 提交
// GID-ID映射
mGidToNid.put(n.getGid(), sqlNote.getId());
mNidToGid.put(sqlNote.getId(), n.getGid());
}
// 远程更新节点的方法
private void updateRemoteNode(Node node, Cursor c) throws
NetworkFailureException {
// 如果同步被取消，则直接返回
if (mCancelled) {
return;
}
SqlNote sqlNote = new SqlNote(mContext, c); // SQL笔记对象
// 远程更新
node.setContentByLocalJSON(sqlNote.getContent()); // 设置内容
GTaskClient.getInstance().addUpdateNode(node); // 更新节点
// 更新元数据
updateRemoteMeta(node.getGid(), sqlNote);
// 如果需要，移动任务
if (sqlNote.isNoteType()) {
Task task = (Task) node; // 任务对象
TaskList preParentList = task.getParent(); // 之前的父任务列表
String curParentGid = mNidToGid.get(sqlNote.getParentId()); // 当前的父GID
if (curParentGid == null) {
Log.e(TAG, "cannot find task's parent tasklist");
throw new ActionFailureException("cannot update remote task");
}
TaskList curParentList = mGTaskListHashMap.get(curParentGid); // 当前的父任务列表
if (preParentList != curParentList) {
preParentList.removeChildTask(task); // 从之前的父任务列表中移除任务
curParentList.addChildTask(task); // 添加到当前的父任务列表
GTaskClient.getInstance().moveTask(task, preParentList, curParentList); // 移动任务
}
}
// 清除本地修改标志
sqlNote.resetLocalModified();
sqlNote.commit(true);
}
// 更新远程元数据的方法
private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {
if (sqlNote != null && sqlNote.isNoteType()) {
MetaData metaData = mMetaHashMap.get(gid); // 获取元数据
if (metaData != null) {
metaData.setMeta(gid, sqlNote.getContent()); // 设置元数据
GTaskClient.getInstance().addUpdateNode(metaData); // 更新元数据
} else {
metaData = new MetaData(); // 创建元数据对象
metaData.setMeta(gid, sqlNote.getContent()); // 设置元数据
mMetaList.addChildTask(metaData); // 添加到元数据列表
mMetaHashMap.put(gid, metaData); // 添加到映射
GTaskClient.getInstance().createTask(metaData); // 创建元数据
}
}
}
// 刷新本地同步ID的方法
private void refreshLocalSyncId() throws NetworkFailureException {
if (mCancelled) {
return;
}
// 获取最新的gtask列表
mGTaskHashMap.clear();
mGTaskListHashMap.clear();
mMetaHashMap.clear();
initGTaskList();
Cursor c = null;
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type<>? AND parent_id<>?)", new String[] {
String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
}, NoteColumns.TYPE + " DESC");
if (c != null) {
while (c.moveToNext()) {
String gid = c.getString(SqlNote.GTASK_ID_COLUMN);
Node node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
ContentValues values = new ContentValues();
values.put(NoteColumns.SYNC_ID, node.getLastModified());
mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
c.getLong(SqlNote.ID_COLUMN)), values, null, null);
} else {
Log.e(TAG, "something is missed");
throw new ActionFailureException(
"some local items don't have gid after sync");
}
}
} else {
Log.w(TAG, "failed to query local note to refresh sync id");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
}
// 获取同步账户的方法
public String getSyncAccount() {
return GTaskClient.getInstance().getSyncAccount().name;
}
// 取消同步的方法
public void cancelSync() {
mCancelled = true;
}
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