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/**
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* The library list cache
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*
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* @type Object
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*/
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var llc = H5PEditor.LibraryListCache = {
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libraryCache: {},
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librariesComingIn: {},
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librariesMissing: {},
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que: []
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};
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/**
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* Get data for a list of libraries
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*
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* @param {Array} libraries - list of libraries to load info for (uber names)
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* @param {Function} handler - Callback when list of libraries is loaded
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* @param {Function} [thisArg] - Context for the callback function
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*/
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llc.getLibraries = function (libraries, handler, thisArg) {
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// Determine whether we're dealing with simple library strings or objects
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libraries = libraries.map(function (option) {
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return (typeof option === 'object') ? option.name : option;
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});
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var cachedLibraries = [];
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var status = 'hasAll';
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for (var i = 0; i < libraries.length; i++) {
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if (libraries[i] in llc.libraryCache) {
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// Libraries that are missing on the server are set to null...
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if (llc.libraryCache[libraries[i]] !== null) {
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cachedLibraries.push(llc.libraryCache[libraries[i]]);
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}
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}
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else if (libraries[i] in llc.librariesComingIn) {
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if (status === 'hasAll') {
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status = 'onTheWay';
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}
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}
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else {
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status = 'requestThem';
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llc.librariesComingIn[libraries[i]] = true;
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}
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}
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switch (status) {
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case 'hasAll':
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handler.call(thisArg, cachedLibraries);
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break;
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case 'onTheWay':
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llc.que.push({libraries: libraries, handler: handler, thisArg: thisArg});
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break;
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case 'requestThem':
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var ajaxParams = {
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type: "POST",
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url: H5PEditor.getAjaxUrl('libraries'),
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success: function (data) {
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llc.setLibraries(data, libraries);
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handler.call(thisArg, data);
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llc.runQue();
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},
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data: {
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'libraries': libraries
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},
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dataType: "json"
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};
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H5PEditor.$.ajax(ajaxParams);
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break;
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}
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};
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/**
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* Call all qued handlers
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*/
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llc.runQue = function () {
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var l = llc.que.length;
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for (var i = 0; i < l; i++) {
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var handlerObject = llc.que.shift();
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llc.getLibraries(handlerObject.libraries, handlerObject.handler, handlerObject.thisArg);
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}
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};
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/**
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* We've got new libraries from the server, save them
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*
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* @param {Array} libraries - Libraries with info from server
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* @param {Array} requestedLibraries - List of what libraries we requested
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*/
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llc.setLibraries = function (libraries, requestedLibraries) {
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var reqLibraries = requestedLibraries.slice();
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for (var i = 0; i < libraries.length; i++) {
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llc.libraryCache[libraries[i].uberName] = libraries[i];
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if (libraries[i].uberName in llc.librariesComingIn) {
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delete llc.librariesComingIn[libraries[i].uberName];
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}
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var index = reqLibraries.indexOf(libraries[i].uberName);
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if (index > -1) {
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reqLibraries.splice(index, 1);
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}
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}
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for (i = 0; i < reqLibraries.length; i++) {
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llc.libraryCache[reqLibraries[i]] = null;
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if (reqLibraries[i] in llc.librariesComingIn) {
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delete llc.librariesComingIn[libraries[i]];
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}
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}
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};
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/**
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* Creates a default content title, based on the title of the library
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* @param {String} uberName "<machineName> <major>.<minor>"
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* @return {String}
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*/
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llc.getDefaultTitle = function (uberName) {
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var libraryMetadata = llc.libraryCache[uberName];
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var title = libraryMetadata && libraryMetadata.title ? libraryMetadata.title : '';
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return H5PEditor.t('core', 'untitled').replace(':libraryTitle', title);
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};
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