50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
const CssSelectorParser = require('css-selector-parser').CssSelectorParser;
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const cssParser = new CssSelectorParser();
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/**
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* @dgProcessor addMetadataAliases
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*
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* Directives and components can also be referenced by their selectors,
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* and Pipes can be referenced by their name.
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* So let's add each selector as an alias to this doc.
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*/
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module.exports = function addMetadataAliasesProcessor() {
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return {
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$runAfter: ['extractDecoratedClassesProcessor'],
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$runBefore: ['computing-ids'],
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$process: function(docs) {
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docs.forEach(doc => {
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switch(doc.docType) {
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case 'directive':
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case 'component':
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doc.aliases = doc.aliases.concat(extractSelectors(doc[doc.docType + 'Options'].selector));
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break;
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case 'pipe':
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if (doc.pipeOptions.name) {
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doc.aliases = doc.aliases.concat(stripQuotes(doc.pipeOptions.name));
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}
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break;
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}
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});
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}
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};
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};
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function extractSelectors(selectors) {
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const selectorAST = cssParser.parse(stripQuotes(selectors));
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const rules = selectorAST.selectors ? selectorAST.selectors.map(ruleSet => ruleSet.rule) : [selectorAST.rule];
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const aliases = {};
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rules.forEach(rule => {
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if (rule.tagName) {
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aliases[rule.tagName] = true;
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}
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if (rule.attrs) {
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rule.attrs.forEach(attr => aliases[attr.name] = true);
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}
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});
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return Object.keys(aliases);
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}
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function stripQuotes(value) {
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return (typeof(value) === 'string') ? value.trim().replace(/^(['"])(.*)\1$/, '$2') : value;
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}
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