51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
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var decode = function(str) {
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try {
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return decodeURIComponent(str);
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} catch(err) {
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return str;
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}
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};
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module.exports = function(pattern) {
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if (typeof pattern !== 'string') { // regex
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return function(url) {
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return url.match(pattern);
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};
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}
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var keys = [];
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pattern = pattern.replace(/:(\w+)/g, '{$1}').replace('{*}', '*'); // normalize
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pattern = pattern.replace(/(\/)?(\.)?\{([^}]+)\}(?:\(([^)]*)\))?(\?)?/g, function(match, slash, dot, key, capture, opt, offset) {
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var incl = (pattern[match.length+offset] || '/') === '/';
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keys.push(key);
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return (incl ? '(?:' : '')+(slash || '')+(incl ? '' : '(?:')+(dot || '')+'('+(capture || '[^/]+')+'))'+(opt || '');
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});
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pattern = pattern.replace(/([\/.])/g, '\\$1').replace(/\*/g, '(.+)');
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pattern = new RegExp('^'+pattern+'[\\/]?$', 'i');
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return function(str) {
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var match = str.match(pattern);
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if (!match) {
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return match;
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}
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var map = {};
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match.slice(1).forEach(function(param, i) {
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var k = keys[i] = keys[i] || 'wildcard';
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param = param && decode(param);
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map[k] = map[k] ? [].concat(map[k]).concat(param) : param;
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});
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if (map.wildcard) {
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map['*'] = map.wildcard;
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}
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return map;
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};
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};
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