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69 lines
1.2 KiB
69 lines
1.2 KiB
'use strict'; |
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var regex = require('regex-not'); |
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var Cache = require('fragment-cache'); |
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/** |
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* Utils |
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*/ |
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var utils = module.exports; |
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var cache = utils.cache = new Cache(); |
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/** |
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* Cast `val` to an array |
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* @return {Array} |
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*/ |
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utils.arrayify = function(val) { |
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if (!Array.isArray(val)) { |
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return [val]; |
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} |
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return val; |
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}; |
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/** |
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* Memoize a generated regex or function |
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*/ |
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utils.memoize = function(type, pattern, options, fn) { |
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var key = utils.createKey(type + pattern, options); |
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if (cache.has(type, key)) { |
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return cache.get(type, key); |
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} |
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var val = fn(pattern, options); |
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if (options && options.cache === false) { |
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return val; |
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} |
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cache.set(type, key, val); |
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return val; |
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}; |
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/** |
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* Create the key to use for memoization. The key is generated |
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* by iterating over the options and concatenating key-value pairs |
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* to the pattern string. |
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*/ |
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utils.createKey = function(pattern, options) { |
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var key = pattern; |
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if (typeof options === 'undefined') { |
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return key; |
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} |
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for (var prop in options) { |
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key += ';' + prop + '=' + String(options[prop]); |
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} |
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return key; |
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}; |
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/** |
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* Create the regex to use for matching text |
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*/ |
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utils.createRegex = function(str) { |
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var opts = {contains: true, strictClose: false}; |
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return regex(str, opts); |
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};
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