bbi.assets.js

/*! BBI Assets Handler (c) Blackbaud, Inc. */
(function (_win, bbi) {
    "use strict";



    var alias = "assets-handler";



    bbi.on("init", function () {



        bbi.extension({
            alias: alias,
            defaults: {
                scriptLoaderUrl: '//api.blackbaud.com/services/asset-loader/index.php'
            },
            directive: function (ext, bbi, $) {



                var settings = ext.settings();
                var bbiSettings = bbi.settings();

                var _dependencies = {
                    "accordion-content": ["handlebars", "handlebars-helpers", "accordion-content"],
                    "bb-twitter-feed": ["handlebars", "moment", "bb-twitter-feed"],
                    "bbnc-carousel": ["handlebars", "handlebars-helpers", "simple-carousel", "bbnc-carousel"],
                    "bbnc-carousel-2.0.0": ["handlebars", "handlebars-helpers", "simple-carousel-2.0.0", "bbnc-carousel-2.0.0"],
                    "bbnc-donation": ["handlebars", "handlebars-helpers", "bbnc-donation"],
                    "bbnc-localize-parts": ["sessvars", "cookie", "bbnc-localize-parts"],
                    "bbnc-virtual-tour": ["jquery-tools", "jquery-easing", "png-fix", "hover-intent", "slideset-1.0.0", "bbnc-virtual-tour"],
                    "flickr-gallery": ["swipebox", "handlebars", "flickr-gallery"],
                    "font-resizer": ["cookie", "font-resizer"],
                    "google-maps": ["handlebars", "google-maps"],
                    "handlebars-helpers": ["handlebars", "handlebars-helpers"],
                    "mega-menu": ["handlebars", "handlebars-helpers", "mega-menu"],
                    "parse-rss": ["handlebars", "sessvars", "moment", "xdomainrequest", "parse-rss"],
                    "simple-carousel": ["handlebars", "handlebars-helpers", "simple-carousel"],
                    "simple-carousel-2.0.0": ["handlebars", "handlebars-helpers", "simple-carousel-2.0.0"],
                    "slideset": ["jquery-tools", "slideset"],
                    "slideset-1.0.0": ["jquery-tools", "slideset-1.0.0"],
                    "youtube-gallery": ["handlebars", "handlebars-helpers", "youtube-gallery"]
                };

                var _assets = [];
                var _events = bbi("events").getInstance();
                var _isDebugMode = bbi.isDebugMode();



                function CheckDependencies (query) {

                    var queryLength = query.length;
                    var label;
                    var temp = [];

                    if (queryLength > 0) {
                        for (var i = 0; i < queryLength; i++) {

                            label = query[i];

                            if (_dependencies.hasOwnProperty(label)) {
                                // A query was found in the dependencies array
                                // Add the dependencies array for this particular query
                                temp.push.apply(temp, _dependencies[label]);
                            } else {
                                temp.push(label);
                            }
                        }
                    }

                    return temp;

                }



                function CheckLoaded (callback) {

                    var loaded = true;

                    for (var k in _assets) {
                        if (_assets[k].loaded === false) {
                            if (_isDebugMode) {
                                bbi.log("Asset not yet loaded: " + k, false);
                            }
                            loaded = false;
                            break;
                        }
                    }

                    if (loaded) {
                        callback();
                    } else {
                        if (typeof myTimeout101 === "undefined") {
                            (function () {
                                var counter = 0;
                                var max = 200; // 10 seconds
                                var myTimeout101 = _win.setTimeout(function () {
                                    counter++;
                                    CheckLoaded(callback);
                                    checkTimer();
                                }, 50);
                                var checkTimer = function () {
                                    if (counter > max) {
                                        _win.clearTimeout(myTimeout101);
                                        if (_isDebugMode) {
                                            bbi.log("Asset waiting period reached its max. Quitting.", false);
                                        }
                                    }
                                };
                            })();
                        }
                    }

                }



                function IsUnique (label) {

                    var unique = (_assets.hasOwnProperty(label) === false);

                    if (_isDebugMode === true) {
                        console.log("[BBI.debug.log] Assets currently loaded: ", _assets);
                    }

                    if (! unique) {
                        if (_isDebugMode === true) {
                            bbi.log("Asset already loaded, and will be ignored: " + label, false);
                        }
                    }

                    return unique;

                }



                function LoadAssets (queue, loadCSS, jQueryLocation, callback) {

                    var queueLength = queue.unique.length;

                    if (queueLength > 0) {

                        if (_isDebugMode) {
                            bbi.log("Attempt to load assets (with dependencies): " + queue.unique.join(","), false);
                        }

                        var url = settings.scriptLoaderUrl + "?query=" + queue.unique.join(",") + "&include_css=" + loadCSS.toString() + "&jquery_location=" + jQueryLocation;

                        if (_isDebugMode) {
                            bbi.log("Requesting assets via: " + url, false);
                        }

                        bbi.helper.loadScript(url, function () {
                            if (_isDebugMode) {
                                bbi.log("Required assets loaded: " + queue.unique.join(", "), false);
                            }
                            for (var i = 0, len = queue.unique.length; i < len; i++) {
                                _assets[queue.unique[i]].loaded = true;
                            }
                            CheckLoaded(callback);
                        });

                    } else {
                        CheckLoaded(callback);
                    }

                }



                function RegisterAsset (label) {

                    if (_isDebugMode === true) {
                        bbi.log("Registering unique asset: " + label, false);
                    }

                    _assets[label] = {
                        loaded: false
                    };

                }



                function RegisterUnique (query) {

                    var label;
                    var temp = {
                        unique: [],
                        requested: query
                    };

                    for (var i = 0, len = query.length; i < len; i++) {

                        label = query[i];

                        if (_isDebugMode === true) {
                            bbi.log("Is the asset '" + label + "' unique?", false);
                        }

                        // This is the first time we've checked,
                        // so just add the entire query at once,
                        // Only add the Asset if it's unique
                        if (IsUnique(label)) {

                            RegisterAsset(label);

                            temp.unique.push(label);

                        }
                    }

                    return temp;

                }



                function Require (query, callback, loadCSS, jQueryLocation) {

                    var queue = [];

                    if (_isDebugMode) {
                        bbi.log("Requesting assets: " + query.join(", "), false);
                    }

                    // Save callback inside an event
                    // This will be triggered when all assets have been loaded
                    var _onComplete = function () {

                        if (_isDebugMode) {
                            bbi.log("Required assets loaded, firing callback.", false);
                        }

                        // Make sure there's a callback before doing anything with it.
                        if (typeof callback != "function") {
                            return;
                        }

                        // Send the window's version of jQuery, in case we're using noConflict.
                        var __$ = bbi.jQuery(jQueryLocation);
                        if (typeof __$ === "function") {
                            callback(__$);
                            return;
                        }

                        // Alright, we must be using Luminate Online, which loads jQuery asynchronously via Yahoo.
                        bbi("luminate").getInstance(0).fetchYahoo(function (a) {
                            callback(a);
                        });

                    };

                    // Make sure assets are passed as an array
                    if (Object.prototype.toString.call(query) !== "[object Array]") {
                        throw new Error("Invalid types passed to BBI.require(). This method accepts two arguments: an Array and a Function.");
                    }

                    // Should we include the assets' stylesheets?
                    if (typeof loadCSS !== "boolean") {
                        loadCSS = true;
                    }

                    // Double-check the jQuery location
                    if (typeof jQueryLocation !== "string") {
	                    jQueryLocation = "window";
                    }

                    var query = CheckDependencies(query);
                    var queue = RegisterUnique(query);

					// Log the request to the Guestbook.
					bbi("debug").getInstance(0).signGuestBook("require|" + query.join(","));

					// Load the assets onto the page.
                    LoadAssets(queue, loadCSS, jQueryLocation, _onComplete);

                }



                return {
                    require: Require
                };

            }
        });



        bbi.map("require", bbi.instantiate(alias).require);



    });



}.call({}, window, bbiGetInstance()));