'use strict';
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const minimatch = require('minimatch');
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const path = require('path');
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const paths = require('./paths');
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const isUrlShouldBeIgnored = paths.isUrlShouldBeIgnored;
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/**
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* Returns whether the given asset matches the given pattern
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* Allways returns true if the given pattern is empty
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*
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* @param {PostcssUrl~Asset} asset the processed asset
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* @param {String|RegExp|Function} pattern A minimatch string,
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* regular expression or function to test the asset
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*
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* @returns {Boolean}
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*/
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const matchesFilter = (asset, pattern) => {
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const relativeToRoot = path.relative(process.cwd(), asset.absolutePath);
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if (typeof pattern === 'string') {
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pattern = minimatch.filter(pattern);
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return pattern(relativeToRoot);
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}
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if (pattern instanceof RegExp) {
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return pattern.test(relativeToRoot);
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}
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if (pattern instanceof Function) {
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return pattern(asset);
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}
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return true;
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};
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/**
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* Matching single option
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*
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* @param {PostcssUrl~Asset} asset
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* @param {PostcssUrl~Options} option
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* @returns {Boolean}
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*/
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const matchOption = (asset, option) => {
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const matched = matchesFilter(asset, option.filter);
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if (!matched) return false;
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return typeof option.url === 'function' || !isUrlShouldBeIgnored(asset.url, option);
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};
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const isMultiOption = (option) =>
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option.multi && typeof option.url === 'function';
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/**
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* Matching options by asset
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*
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* @param {PostcssUrl~Asset} asset
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* @param {PostcssUrl~Options|PostcssUrl~Options[]} options
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* @returns {PostcssUrl~Options|undefined}
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*/
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const matchOptions = (asset, options) => {
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if (!options) return;
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if (Array.isArray(options)) {
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const optionIndex = options.findIndex((option) => matchOption(asset, option));
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if (optionIndex < 0) return;
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const matchedOption = options[optionIndex];
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// if founded option is last
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if (optionIndex === options.length - 1) return matchedOption;
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const extendOptions = options
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.slice(optionIndex + 1)
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.filter((option) =>
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(isMultiOption(matchedOption) || isMultiOption(option)) && matchOption(asset, option)
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);
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return extendOptions.length
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? [matchedOption].concat(extendOptions)
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: matchedOption;
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}
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if (matchOption(asset, options)) return options;
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};
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module.exports = matchOptions;
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