309 lines
8.6 KiB
JavaScript
309 lines
8.6 KiB
JavaScript
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/**
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* amWiki Web端 - 浏览器数据缓存模块
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* @author Tevin
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*/
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;
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(function (win) {
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'use strict';
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var tools = win.tools;
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var wikiPath = tools.simString(win.location.pathname.replace('/', '').replace(/\//g, '_')).toUpperCase();
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var LOCAL_STORAGE_NAME = 'AMWikiDataBase@' + wikiPath; //本地数据localStorage键名
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var LOCAL_STATES = 'AMWikiStates@' + wikiPath; //本地状态集键名
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/**
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* 本地存储管理
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* @constructor
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*/
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var Storage = function () {
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this._db = null; //内存中的文库缓存
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this._states = null; //内存中的状态集
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this.$e = {
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win: $(win),
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//更新全部缓存按钮
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searchUpdate: $('#searchUpdate'),
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//缓存状态
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cacheState: $('#cacheState'),
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//文档总数
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cacheDocTotal: $('#cacheDocTotal'),
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//上次全部缓存更新时间
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cacheLasttime: $('#cacheLasttime')
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};
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this._bridgeLocalStorage('read');
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this._bindCtrl();
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};
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/**
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* 存取本地存储
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* @param {String} type - read / save
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* @private
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*/
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Storage.prototype._bridgeLocalStorage = function (type) {
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if (type == 'read') {
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var defaultStr = '{"documents":{},"lastBuild":0}';
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this._db = JSON.parse(win.localStorage[LOCAL_STORAGE_NAME] || defaultStr);
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//转换旧名称
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if (typeof this._db.libraries != 'undefined') {
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this._db.documents = this._db.libraries;
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delete this._db.libraries;
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}
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} else if (type == 'save') {
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win.localStorage[LOCAL_STORAGE_NAME] = JSON.stringify(this._db);
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}
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};
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/**
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* 绑定操作
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* @private
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*/
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Storage.prototype._bindCtrl = function () {
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var that = this;
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this.$e.win.on('beforeunload', function () {
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that._bridgeLocalStorage('save');
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});
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};
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/**
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* 更新一篇文档，如果相同则不操作(对应内容不用重新渲染)
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* @param {String} uri
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* @param {String} content
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* @returns {Boolean}
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* @public
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*/
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Storage.prototype.update = function (uri, content) {
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var id = tools.simString(uri, 'short');
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if (this._db.documents[id]) {
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if (this._db.documents[id].content == content) {
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return false;
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} else {
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this.saveDoc(uri, content, id);
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return true;
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}
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} else {
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this.saveDoc(uri, content, id);
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return true;
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}
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};
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/**
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* 保存一篇文档
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* @param {String} uri - 文档资源地址
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* @param {String} content - 文档内容
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* @param {String} [id] - 已经编码的文档地址，可选
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* @public
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*/
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Storage.prototype.saveDoc = function (uri, content, id) {
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this.saveDocToDB(uri, content, id);
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this._bridgeLocalStorage('save');
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this._changeSummary('sateOnly');
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};
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/**
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* 将文档存储到内存
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* @param {String} uri
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* @param {String} content
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* @param {String} id
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* @public
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*/
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Storage.prototype.saveDocToDB = function (uri, content, id) {
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if (typeof uri != 'string' && uri == '') {
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throw new Error('Error, uri must be a string!');
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}
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if (typeof id == 'undefined') {
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id = tools.simString(uri, 'short');
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}
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this._db.documents[id] = {
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id: id,
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uri: uri,
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content: content || '',
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timestamp: Date.now()
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};
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this._changeSummary('sateOnly', 'prepare');
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};
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/**
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* 读取一篇文档
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* @param {String} uri - 文档资源地址
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* @returns {String} 文档内容
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* @public
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*/
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Storage.prototype.read = function (uri) {
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var id = tools.simString(uri, 'short');
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var article = '';
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if (this._db.documents[id]) {
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article = this._db.documents[id].content;
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}
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return article;
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};
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/**
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* 读取一篇文档的时间
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* @param {String} uri - 文档资源地址
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* @returns {String} 文档内容
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* @public
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*/
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Storage.prototype.readTime = function (uri) {
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var id = tools.simString(uri, 'short');
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if (this._db.documents[id]) {
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return this._db.documents[id].timestamp;
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} else {
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return 0;
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}
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};
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/**
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* 删除一篇文档
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* @param {String} uri - 文档资源地址
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* @public
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*/
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Storage.prototype.remove = function (uri) {
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var id = tools.simString(uri, 'short');
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delete this._db.documents[id];
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this._bridgeLocalStorage('save');
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this._changeSummary('sateOnly');
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};
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/**
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* 增涨文档打开数记录
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* @param {String} uri
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* @public
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*/
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Storage.prototype.increaseOpenedCount = function (uri) {
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var id = tools.simString(uri, 'short');
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//TODO: 待续...打开次数将一定程度影响排行
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};
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/**
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* 校对列表，清除失效文档
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* @param {Array} list - 由导航树偏平化生成的文档列表
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* @public
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*/
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Storage.prototype.checkLibChange = function (list) {
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this._indexing = list;
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var documents = {};
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var id = '';
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for (var i = 0; i < list.length; i++) {
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id = tools.simString(list[i], 'short');
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if (typeof this._db.documents[id] != 'undefined') {
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documents[id] = this._db.documents[id];
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}
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}
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this._db.documents = documents;
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this._bridgeLocalStorage('save');
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this._changeSummary();
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};
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/**
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* 更新缓存摘要（位于搜素面板）
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* @param {String} stateOnly - 是否为只读 stateOnly / ...
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* @param {String} prepare - 是否为预先 prepare / ...
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* @private
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*/
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Storage.prototype._changeSummary = function (stateOnly, prepare) {
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var libraryiesLong = 0;
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for (var p in this._db.documents) {
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if (this._db.documents.hasOwnProperty(p)) {
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libraryiesLong++;
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}
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}
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//如果是预先，百分数减1
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if (prepare == 'prepare') {
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this.$e.cacheState.text(parseInt(libraryiesLong / this._indexing.length * 100 - 1) + '%');
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}
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//非预先则正常
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else {
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this.$e.cacheState.text(parseInt(libraryiesLong / this._indexing.length * 100) + '%');
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}
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//如果不只是状态
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if (stateOnly != 'stateOnly') {
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this.$e.cacheDocTotal.text(this._indexing.length);
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if (this._db.lastBuild) {
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this.$e.cacheLasttime.text(win.tools.formatTime(this._db.lastBuild));
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} else {
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this.$e.cacheLasttime.text('0000-00-00 00:00:00');
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}
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}
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};
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/**
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* 清除内存中的库列表
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* @public
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*/
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Storage.prototype.clearLibraries = function () {
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this._db.documents = {};
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this._changeSummary('sateOnly');
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};
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/**
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* 完成本次缓存重建
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* @public
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*/
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Storage.prototype.saveRebuild = function () {
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this._db.lastBuild = Date.now();
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this._bridgeLocalStorage('save');
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this._changeSummary();
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};
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/**
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* 返回导航列表
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* @returns {Array}
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* @public
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*/
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Storage.prototype.getIndexList = function () {
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return this._indexing;
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};
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/**
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* 获取当前缓存的所有文档
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* @returns {{Object}}
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* @public
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*/
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Storage.prototype.getAllDocs = function () {
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return this._db.documents;
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};
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/**
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* 获取缓存最后重建时间
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* @returns {Number}
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* @public
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*/
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Storage.prototype.getLastBuildTs = function () {
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return this._db.lastBuild;
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};
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/**
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* 获取本地存储中指定名称的值
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* @param {String} name
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* @returns {*}
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* @public
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*/
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Storage.prototype.getStates = function (name) {
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if (!this._states) {
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this._states = JSON.parse(win.localStorage[LOCAL_STATES] || '{}');
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}
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return this._states[name];
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};
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/**
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* 保持键值对到本地存储
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* @param {String} name
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* @param {*} value
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* @public
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*/
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Storage.prototype.setStates = function (name, value) {
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if (!this._states) {
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this._states = JSON.parse(win.localStorage[LOCAL_STATES] || '{}');
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}
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if (typeof value == 'undefined') {
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delete this._states[name];
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} else {
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this._states[name] = value;
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}
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win.localStorage[LOCAL_STATES] = JSON.stringify(this._states);
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};
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return win.AWStorage = Storage;
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})(window);
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