src/mkws-core.js

   1 /*! MKWS, the MasterKey Widget Set.
   2  *  Copyright (C) 2013-2014 Index Data
   3  *  See the file LICENSE for details
   4  */
   5
   6 "use strict"; // HTML5: disable for log_level >= 2
   7
   8
   9 // Set up global mkws object. Contains truly global state such as SP
  10 // authentication, and a hash of team objects, indexed by team-name.
  11 //
  12 var mkws = {
  13     authenticated: false,
  14     log_level: 1, // Will be overridden from mkws.config, but
  15                   // initial value allows jQuery popup to use logging.
  16     teams: {},
  17     widgetType2function: {},
  18
  19     locale_lang: {
  20         "de": {
  21             "Authors": "Autoren",
  22             "Subjects": "Schlagw&ouml;rter",
  23             "Sources": "Daten und Quellen",
  24             "source": "datenquelle",
  25             "Termlists": "Termlisten",
  26             "Next": "Weiter",
  27             "Prev": "Zur&uuml;ck",
  28             "Search": "Suche",
  29             "Sort by": "Sortieren nach",
  30             "and show": "und zeige",
  31             "per page": "pro Seite",
  32             "Displaying": "Zeige",
  33             "to": "von",
  34             "of": "aus",
  35             "found": "gefunden",
  36             "Title": "Titel",
  37             "Author": "Autor",
  38             "author": "autor",
  39             "Date": "Datum",
  40             "Subject": "Schlagwort",
  41             "subject": "schlagwort",
  42             "Location": "Ort",
  43             "Records": "Datens&auml;tze",
  44             "Targets": "Datenbanken",
  45
  46             "dummy": "dummy"
  47         },
  48
  49         "da": {
  50             "Authors": "Forfattere",
  51             "Subjects": "Emner",
  52             "Sources": "Kilder",
  53             "source": "kilder",
  54             "Termlists": "Termlists",
  55             "Next": "N&aelig;ste",
  56             "Prev": "Forrige",
  57             "Search": "S&oslash;g",
  58             "Sort by": "Sorter efter",
  59             "and show": "og vis",
  60             "per page": "per side",
  61             "Displaying": "Viser",
  62             "to": "til",
  63             "of": "ud af",
  64             "found": "fandt",
  65             "Title": "Title",
  66             "Author": "Forfatter",
  67             "author": "forfatter",
  68             "Date": "Dato",
  69             "Subject": "Emneord",
  70             "subject": "emneord",
  71             "Location": "Lokation",
  72             "Records": "Poster",
  73             "Targets": "Baser",
  74
  75             "dummy": "dummy"
  76         }
  77     }
  78 };
  79
  80
  81 mkws.log = function(string) {
  82     if (!mkws.log_level)
  83         return;
  84
  85     if (typeof console === "undefined" || typeof console.log === "undefined") { /* ARGH!!! old IE */
  86         return;
  87     }
  88
  89     // you need to disable use strict at the top of the file!!!
  90     if (mkws.log_level >= 3) {
  91         console.log(arguments.callee.caller);
  92     } else if (mkws.log_level >= 2) {
  93         console.log(">>> called from function " + arguments.callee.caller.name + ' <<<');
  94     }
  95     console.log(string);
  96 };
  97
  98
  99 // This function is taken from a StackOverflow answer
 100 // http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript/901144#901144
 101 mkws.getParameterByName = function(name) {
 102     name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
 103     var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
 104         results = regex.exec(location.search);
 105     return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 106 }
 107
 108
 109 mkws.registerWidgetType = function(name, fn) {
 110     mkws.widgetType2function[name] = fn;
 111     mkws.log("registered widget-type '" + name + "'");
 112 };
 113
 114 mkws.promotionFunction = function(name) {
 115     return mkws.widgetType2function[name];
 116 };
 117
 118
 119 mkws.setMkwsConfig = function(overrides) {
 120     // Set global log_level flag early so that mkws.log() works
 121     // Fall back to old "debug_level" setting for backwards compatibility
 122     var tmp = overrides.log_level;
 123     if (typeof(tmp) === 'undefined') tmp = overrides.debug_level;
 124     if (typeof(tmp) !== 'undefined') mkws.log_level = tmp;
 125
 126     var config_default = {
 127         use_service_proxy: true,
 128         pazpar2_url: "//mkws.indexdata.com/service-proxy/",
 129         service_proxy_auth: "//mkws.indexdata.com/service-proxy-auth",
 130         lang: "",
 131         sort_options: [["relevance"], ["title:1", "title"], ["date:0", "newest"], ["date:1", "oldest"]],
 132         perpage_options: [10, 20, 30, 50],
 133         sort_default: "relevance",
 134         perpage_default: 20,
 135         query_width: 50,
 136         show_lang: true,        /* show/hide language menu */
 137         show_sort: true,        /* show/hide sort menu */
 138         show_perpage: true,     /* show/hide perpage menu */
 139         lang_options: [],       /* display languages links for given languages, [] for all */
 140         facets: ["xtargets", "subject", "author"], /* display facets, in this order, [] for none */
 141         responsive_design_width: undefined, /* a page with less pixel width considered as narrow */
 142         log_level: 1,     /* log level for development: 0..2 */
 143
 144         dummy: "dummy"
 145     };
 146
 147     mkws.config = mkws.objectInheritingFrom(config_default);
 148     for (var k in overrides) {
 149         mkws.config[k] = overrides[k];
 150     }
 151 };
 152
 153
 154 // This code is from Douglas Crockford's article "Prototypal Inheritance in JavaScript"
 155 // http://javascript.crockford.com/prototypal.html
 156 // mkws.objectInheritingFrom behaves the same as Object.create,
 157 // but since the latter is not available in IE8 we can't use it.
 158 //
 159 mkws.objectInheritingFrom = function(o) {
 160     function F() {}
 161     F.prototype = o;
 162     return new F();
 163 }
 164
 165
 166 // The following functions are dispatchers for team methods that
 167 // are called from the UI using a team-name rather than implicit
 168 // context.
 169 mkws.switchView = function(tname, view) {
 170     mkws.teams[tname].switchView(view);
 171 };
 172
 173 mkws.showDetails = function(tname, prefixRecId) {
 174     mkws.teams[tname].showDetails(prefixRecId);
 175 };
 176
 177 mkws.limitTarget  = function(tname, id, name) {
 178     mkws.teams[tname].limitTarget(id, name);
 179 };
 180
 181 mkws.limitQuery  = function(tname, field, value) {
 182     mkws.teams[tname].limitQuery(field, value);
 183 };
 184
 185 mkws.delimitTarget = function(tname, id) {
 186     mkws.teams[tname].delimitTarget(id);
 187 };
 188
 189 mkws.delimitQuery = function(tname, field, value) {
 190     mkws.teams[tname].delimitQuery(field, value);
 191 };
 192
 193 mkws.showPage = function(tname, pageNum) {
 194     mkws.teams[tname].showPage(pageNum);
 195 };
 196
 197 mkws.pagerPrev = function(tname) {
 198     mkws.teams[tname].pagerPrev();
 199 };
 200
 201 mkws.pagerNext = function(tname) {
 202     mkws.teams[tname].pagerNext();
 203 };
 204
 205
 206 // wrapper to call team() after page load
 207 (function(j) {
 208     var log = mkws.log;
 209
 210     function handleNodeWithTeam(node, callback) {
 211         // First branch for DOM objects; second branch for jQuery objects
 212         var classes = node.className || node.attr('class');
 213         if (!classes) {
 214             // For some reason, if we try to proceed when classes is
 215             // undefined, we don't get an error message, but this
 216             // function and its callers, up several stack level,
 217             // silently return. What a crock.
 218             log("handleNodeWithTeam() called on node with no classes");
 219             return;
 220         }
 221         var list = classes.split(/\s+/)
 222         var teamName, type;
 223
 224         for (var i = 0; i < list.length; i++) {
 225             var cname = list[i];
 226             if (cname.match(/^mkwsTeam_/)) {
 227                 teamName = cname.replace(/^mkwsTeam_/, '');
 228             } else if (cname.match(/^mkws/)) {
 229                 type = cname.replace(/^mkws/, '');
 230             }
 231         }
 232
 233         if (!teamName) teamName = "AUTO";
 234         callback.call(node, teamName, type);
 235     }
 236
 237
 238     function resizePage() {
 239         var list = ["mkwsSwitch", "mkwsLang"];
 240
 241         var width = mkws.config.responsive_design_width;
 242         var parent = $(".mkwsTermlists").parent();
 243
 244         if ($(window).width() <= width &&
 245             parent.hasClass("mkwsTermlistContainer1")) {
 246             log("changing from wide to narrow: " + $(window).width());
 247             $(".mkwsTermlistContainer1").hide();
 248             $(".mkwsTermlistContainer2").show();
 249             for (var tname in mkws.teams) {
 250                 $(".mkwsTermlists.mkwsTeam_" + tname).appendTo($(".mkwsTermlistContainer2.mkwsTeam_" + tname));
 251                 for(var i = 0; i < list.length; i++) {
 252                     $("." + list[i] + ".mkwsTeam_" + tname).hide();
 253                 }
 254             }
 255         } else if ($(window).width() > width &&
 256                    parent.hasClass("mkwsTermlistContainer2")) {
 257             log("changing from narrow to wide: " + $(window).width());
 258             $(".mkwsTermlistContainer1").show();
 259             $(".mkwsTermlistContainer2").hide();
 260             for (var tname in mkws.teams) {
 261                 $(".mkwsTermlists.mkwsTeam_" + tname).appendTo($(".mkwsTermlistContainer1.mkwsTeam_" + tname));
 262                 for(var i = 0; i < list.length; i++) {
 263                     $("." + list[i] + ".mkwsTeam_" + tname).show();
 264                 }
 265             }
 266         }
 267     };
 268
 269
 270     /*
 271      * Run service-proxy authentication in background (after page load).
 272      * The username/password is configured in the apache config file
 273      * for the site.
 274      */
 275     function authenticateSession(auth_url, auth_domain, pp2_url) {
 276         log("Run service proxy auth URL: " + auth_url);
 277
 278         if (!auth_domain) {
 279             auth_domain = pp2_url.replace(/^(https?:)?\/\/(.*?)\/.*/, '$2');
 280             log("guessed auth_domain '" + auth_domain + "' from pp2_url '" + pp2_url + "'");
 281         }
 282
 283         var request = new pzHttpRequest(auth_url, function(err) {
 284             alert("HTTP call for authentication failed: " + err)
 285             return;
 286         }, auth_domain);
 287
 288         request.get(null, function(data) {
 289             if (!$.isXMLDoc(data)) {
 290                 alert("service proxy auth response document is not valid XML document, give up!");
 291                 return;
 292             }
 293             var status = $(data).find("status");
 294             if (status.text() != "OK") {
 295                 alert("service proxy auth response status: " + status.text() + ", give up!");
 296                 return;
 297             }
 298
 299             log("Service proxy auth successfully done");
 300             mkws.authenticated = true;
 301             var authName = $(data).find("displayName").text();
 302             // You'd think there would be a better way to do this:
 303             var realm = $(data).find("realm:not(realmAttributes realm)").text();
 304             for (var teamName in mkws.teams) {
 305                 mkws.teams[teamName].queue("authenticated").publish(authName, realm);
 306             }
 307
 308             runAutoSearches();
 309         });
 310     }
 311
 312
 313     function runAutoSearches() {
 314         log("running auto searches");
 315
 316         for (var teamName in mkws.teams) {
 317             mkws.teams[teamName].queue("ready").publish();
 318         }
 319     }
 320
 321     $(document).ready(function() {
 322         var saved_config;
 323         if (typeof mkws_config === 'undefined') {
 324             log("setting empty config");
 325             saved_config = {};
 326         } else {
 327             log("using config: " + $.toJSON(mkws_config));
 328             saved_config = mkws_config;
 329         }
 330         mkws.setMkwsConfig(saved_config);
 331
 332         for (var key in mkws.config) {
 333             if (mkws.config.hasOwnProperty(key)) {
 334                 if (key.match(/^language_/)) {
 335                     var lang = key.replace(/^language_/, "");
 336                     // Copy custom languages into list
 337                     mkws.locale_lang[lang] = mkws.config[key];
 338                     log("Added locally configured language '" + lang + "'");
 339                 }
 340             }
 341         }
 342
 343         if (mkws.config.query_width < 5 || mkws.config.query_width > 150) {
 344             log("Reset query width: " + mkws.config.query_width);
 345             mkws.config.query_width = 50;
 346         }
 347
 348         // protocol independent link for pazpar2: "//mkws/sp" -> "https://mkws/sp"
 349         if (mkws.config.pazpar2_url.match(/^\/\//)) {
 350             mkws.config.pazpar2_url = document.location.protocol + mkws.config.pazpar2_url;
 351             log("adjust protocol independent links: " + mkws.config.pazpar2_url);
 352         }
 353
 354         if (mkws.config.responsive_design_width) {
 355             // Responsive web design - change layout on the fly based on
 356             // current screen width. Required for mobile devices.
 357             $(window).resize(resizePage);
 358             // initial check after page load
 359             $(document).ready(resizePage);
 360         }
 361
 362         // Backwards compatibility: set new magic class names on any
 363         // elements that have the old magic IDs.
 364         var ids = [ "Switch", "Lang", "Search", "Pager", "Navi",
 365                     "Results", "Records", "Targets", "Ranking",
 366                     "Termlists", "Stat", "MOTD" ];
 367         for (var i = 0; i < ids.length; i++) {
 368             var id = 'mkws' + ids[i];
 369             var node = $('#' + id);
 370             if (node.attr('id')) {
 371                 node.addClass(id);
 372                 log("added magic class to '" + node.attr('id') + "'");
 373             }
 374         }
 375
 376         // Find all nodes with an MKWS class, and determine their team from
 377         // the mkwsTeam_* class. Make all team objects.
 378         var then = $.now();
 379         $('[class^="mkws"],[class*=" mkws"]').each(function() {
 380             handleNodeWithTeam(this, function(tname, type) {
 381                 if (!mkws.teams[tname]) {
 382                     mkws.teams[tname] = team(j, tname);
 383                     log("Made MKWS team '" + tname + "'");
 384                 }
 385             });
 386         });
 387         // Second pass: make the individual widget objects. This has
 388         // to be done separately, and after the team-creation, since
 389         // that sometimes makes new widget nodes (e.g. creating
 390         // mkwsTermlists inside mkwsResults.
 391         $('[class^="mkws"],[class*=" mkws"]').each(function() {
 392             handleNodeWithTeam(this, function(tname, type) {
 393                 var myTeam = mkws.teams[tname];
 394                 var myWidget = widget(j, myTeam, type, this);
 395                 myTeam.addWidget(myWidget);
 396             });
 397         });
 398         var now = $.now();
 399         log("Walking MKWS nodes took " + (now-then) + " ms");
 400
 401 //        for (var tName in mkws.teams) {
 402 //            var myTeam = mkws.teams[tName]
 403 //            var types = myTeam.widgetTypes();
 404 //            log("TEAM '" + tName + "' = " + myTeam + " has widget types " + types);
 405 //            for (var i = 0; i < types.length; i++) {
 406 //                var type = types[i];
 407 //                log("  has widget of type '" + type + "': " + myTeam.widget(type));
 408 //            }
 409 //        }
 410
 411         if (mkws.config.use_service_proxy) {
 412             authenticateSession(mkws.config.service_proxy_auth,
 413                                 mkws.config.service_proxy_auth_domain,
 414                                 mkws.config.pazpar2_url);
 415         } else {
 416             // raw pp2
 417             runAutoSearches();
 418         }
 419     });
 420 })(jQuery);