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src/selectors.js
36 строк
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Rafael Oleza
Reformat all JS files using prettier
31 май 2019, 19:33
31 май 2019, 19:33
7f3f040
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module.exports = { selectorMatchesAnyScope, matcherForSelector }; const { isSubset } = require('underscore-plus'); // Private: Parse a selector into parts. // If already parsed, returns the selector unmodified. // // * `selector` a {String|Array<String>} specifying what to match // Returns selector parts, an {Array<String>}. function parse(selector) { return typeof selector === 'string' ? selector.replace(/^\./, '').split('.') : selector; } const always = scope => true; // Essential: Return a matcher function for a selector. // // * selector, a {String} selector // Returns {(scope: String) -> Boolean}, a matcher function returning // true iff the scope matches the selector. function matcherForSelector(selector) { const parts = parse(selector); if (typeof parts === 'function') return parts; return selector ? scope => isSubset(parts, parse(scope)) : always; } // Essential: Return true iff the selector matches any provided scope. // // * {String} selector // * {Array<String>} scopes // Returns {Boolean} true if any scope matches the selector. function selectorMatchesAnyScope(selector, scopes) { return !selector || scopes.some(matcherForSelector(selector)); }