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