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var cssParser = require('css');
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var extractClassesFromRules = require('./extract-classes-from-rules');
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var extractIdsFromRules = require('./extract-ids-from-rules');
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/**
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* Extract the class names from the selectors found
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* in the specified code. Class order is not guaranteed.
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* @param {string} code the CSS code to parse
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* @return {Array.<string>} the list of class names
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*/
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function extractClasses(code) {
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var ast = cssParser.parse(code);
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return extractClassesFromRules(ast.stylesheet.rules);
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}
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/**
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* Extract the ids from the selectors found
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* in the specified code. Id order is not guaranteed.
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* @param {string} code the CSS code to parse
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* @return {Array.<string>} the list of ids
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*/
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function extractIds(code) {
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var ast = cssParser.parse(code);
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return extractIdsFromRules(ast.stylesheet.rules);
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}
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var extractMethods = {
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extractClassesFromRules: extractClassesFromRules,
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extractIdsFromRules: extractIdsFromRules
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};
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function capitalize(string) {
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return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
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}
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/**
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* Extract the specified features from a given code
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* @param {string[]} features
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* @param {string} code
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* @return {Object.<string, string[]>} For each feature, a list of matches
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*/
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function extract(features, code) {
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var ast = cssParser.parse(code);
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var rules = ast.stylesheet.rules;
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var method, methodName, feature;
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var result = {};
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var i = 0;
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while (!!(feature = features[i++])) {
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methodName = 'extract' + capitalize(feature) + 'FromRules';
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method = extractMethods[methodName];
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if (method) {
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result[feature] = method(rules);
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} else {
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throw new Error('Unsupported feature ' + feature);
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}
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}
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return result;
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}
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extract.extractClasses = extractClasses;
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extract.extractIds = extractIds;
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module.exports = extract;
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