80 lines
1.6 KiB
JavaScript
80 lines
1.6 KiB
JavaScript
var hasOwnProperty = Object.prototype.hasOwnProperty;
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function buildMap(list, caseInsensitive) {
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var map = Object.create(null);
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if (!Array.isArray(list)) {
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return null;
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}
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for (var i = 0; i < list.length; i++) {
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var name = list[i];
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if (caseInsensitive) {
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name = name.toLowerCase();
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}
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map[name] = true;
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}
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return map;
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}
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function buildList(data) {
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if (!data) {
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return null;
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}
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var tags = buildMap(data.tags, true);
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var ids = buildMap(data.ids);
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var classes = buildMap(data.classes);
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if (tags === null &&
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ids === null &&
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classes === null) {
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return null;
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}
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return {
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tags: tags,
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ids: ids,
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classes: classes
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};
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}
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function buildIndex(data) {
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var scopes = false;
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if (data.scopes && Array.isArray(data.scopes)) {
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scopes = Object.create(null);
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for (var i = 0; i < data.scopes.length; i++) {
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var list = data.scopes[i];
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if (!list || !Array.isArray(list)) {
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throw new Error('Wrong usage format');
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}
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for (var j = 0; j < list.length; j++) {
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var name = list[j];
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if (hasOwnProperty.call(scopes, name)) {
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throw new Error('Class can\'t be used for several scopes: ' + name);
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}
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scopes[name] = i + 1;
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}
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}
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}
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return {
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whitelist: buildList(data),
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blacklist: buildList(data.blacklist),
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scopes: scopes
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};
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}
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module.exports = {
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buildIndex: buildIndex
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};
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