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1function mergeArrays() {
2  var arr = arguments[0] || [];
3  for (var i = 1; i < arguments.length; i++) {
4    arr = arr.concat(arguments[i]);
5  }
6  return arr;
7}
8
9var ALL_RESOURCES = mergeArrays(
10  ABOUT_RESOURCES,
11  DESIGN_RESOURCES,
12  DISTRIBUTE_RESOURCES,
13  GOOGLE_RESOURCES,
14  GUIDE_RESOURCES,
15  SAMPLES_RESOURCES,
16  TOOLS_RESOURCES,
17  TRAINING_RESOURCES,
18  YOUTUBE_RESOURCES,
19  BLOGGER_RESOURCES
20);
21
22for (var i = 0; i < ALL_RESOURCES.length; i++) {
23  ALL_RESOURCES[i].index = i;
24}
25
26function mergeMaps() {
27  var allRes = {};
28  var offset = 0;
29
30  for (var i = 0; i < arguments.length; i++) {
31    var r = arguments[i];
32    for (var tag in r.map) {
33      allRes[tag] = allRes[tag] || [];
34      allRes[tag] = allRes[tag].concat(r.map[tag].map(function(i){ return ALL_RESOURCES[i + offset]; }));
35    }
36    offset += r.arr.length;
37  }
38
39  return allRes;
40}
41
42function setFromArray(arr) {
43  arr = arr || [];
44  var set = {};
45  for (var i = 0; i < arr.length; i++) {
46    set[arr[i]] = true;
47  }
48  return set;
49}
50
51function buildResourceLookupMap(resourceDict) {
52  var map = {};
53  for (var key in resourceDict) {
54    var dictForKey = {};
55    var srcArr = resourceDict[key];
56    for (var i = 0; i < srcArr.length; i++) {
57      dictForKey[srcArr[i].index] = true;
58    }
59    map[key] = dictForKey;
60  }
61  return map;
62}
63
64// Type lookups
65
66var ALL_RESOURCES_BY_TYPE = {
67  'about': ABOUT_RESOURCES,
68  'design': DESIGN_RESOURCES,
69  'distribute': DISTRIBUTE_RESOURCES,
70  'google': GOOGLE_RESOURCES,
71  'guide': GUIDE_RESOURCES,
72  'samples': SAMPLES_RESOURCES,
73  'tools': TOOLS_RESOURCES,
74  'training': TRAINING_RESOURCES,
75  'youtube': YOUTUBE_RESOURCES,
76  'blog': BLOGGER_RESOURCES
77};
78var IS_RESOURCE_OF_TYPE = buildResourceLookupMap(ALL_RESOURCES_BY_TYPE);
79
80// Tag lookups
81
82var ALL_RESOURCES_BY_TAG = mergeMaps(
83  {map:ABOUT_BY_TAG,arr:ABOUT_RESOURCES},
84  {map:DESIGN_BY_TAG,arr:DESIGN_RESOURCES},
85  {map:DISTRIBUTE_BY_TAG,arr:DISTRIBUTE_RESOURCES},
86  {map:GOOGLE_BY_TAG,arr:GOOGLE_RESOURCES},
87  {map:GUIDE_BY_TAG,arr:GUIDE_RESOURCES},
88  {map:SAMPLES_BY_TAG,arr:SAMPLES_RESOURCES},
89  {map:TOOLS_BY_TAG,arr:TOOLS_RESOURCES},
90  {map:TRAINING_BY_TAG,arr:TRAINING_RESOURCES},
91  {map:YOUTUBE_BY_TAG,arr:YOUTUBE_RESOURCES},
92  {map:BLOGGER_BY_TAG,arr:BLOGGER_RESOURCES}
93);
94var IS_RESOURCE_TAGGED = buildResourceLookupMap(ALL_RESOURCES_BY_TAG);
95
96// URL and language lookups
97
98var ALL_RESOURCES_BY_URL = {};
99var ALL_RESOURCES_BY_LANG = {};
100
101for (var i = 0; i < ALL_RESOURCES.length; i++) {
102  var res = ALL_RESOURCES[i];
103  var lang = res.lang;
104  if (lang) {
105    ALL_RESOURCES_BY_LANG[lang] = ALL_RESOURCES_BY_LANG[lang] || [];
106    ALL_RESOURCES_BY_LANG[lang].push(res);
107  }
108  var url = res.url;
109  if (url) {
110    ALL_RESOURCES_BY_URL[url] = res;
111  }
112}
113var IS_RESOURCE_IN_LANG = buildResourceLookupMap(ALL_RESOURCES_BY_LANG);