Initial commit (basic prop expanding implemented)

Author: kizu

.gitignore

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+node_modules

Readme.md

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+# Hayaku Core [WIP]
+
+I'm starting on experimenting with a new implementation of Hayaku in JS.
+
+For now its all prototype & placeholder stuff, don't use anywhere, as nothing is guaranteed.

index.js

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+const CSSdata = require('mdn-data');
+const PropsByPopularity = require('./lib/props-by-popularity.js');
+
+const propNames = Object.keys(CSSdata.css.properties);
+
+const propRegexps = propNames.map(prop => {
+  let prefix = '';
+  let property = prop;
+  if (prop[0] === '-') {
+    let matchPrefix = prop.match(/^(-[^-]*-)(.+)$/i)
+    if (matchPrefix) {
+      prefix = matchPrefix[1];
+      property = matchPrefix[2];
+    }
+  }
+
+  property = property.replace(/([\*])/g, '\\$1');
+  property = property.replace(/(.)/g, '$1?').replace(/^(.)\?/g, '$1');
+
+  // TODO & FIXME: handle prefix, now its fakey-fakey
+  return {
+    strictProp: new RegExp(`^${prefix + property.replace(/(\-\?.)\?/g, '$1')}$`, 'i'),
+    looseProp: new RegExp(`^${prefix + property}$`, 'i')
+  };
+});
+
+const expandProps = function(abbr) {
+  const filteredProps = propNames.filter((prop, i) => abbr.match(propRegexps[i].looseProp));
+  const rankedProps = filteredProps.map(prop => { return {
+    name: prop,
+    weights: {
+      hasProperDashes: (
+        prop.indexOf('-') === -1 || abbr.match(propRegexps[propNames.indexOf(prop)].strictProp)
+      ) ? 1 : 0,
+      startsFromAbbr: prop.indexOf(abbr) === 0 ? 1 : 0,
+      hasCommonPairStart: (
+        (prop.indexOf('border') === 0 && abbr.indexOf('bd') === 0) ||
+        (prop.indexOf('background') === 0 && abbr.indexOf('bg') === 0)
+      ) ? 1 : 0,
+      hasDirections: prop.match(/top|right|bottom|left/) ? 1 : 0,
+      popularity: PropsByPopularity.indexOf(prop) === -1 ? PropsByPopularity.length : PropsByPopularity.indexOf(prop),
+      strLength: prop.length
+    }
+  }})
+
+  rankedProps.sort((a, b) => {
+    return (b.weights.hasProperDashes - a.weights.hasProperDashes) ||
+           (b.weights.startsFromAbbr - a.weights.startsFromAbbr) ||
+           (b.weights.hasCommonPairStart - a.weights.hasCommonPairStart) ||
+           (b.weights.hasDirections - a.weights.hasDirections) ||
+           (a.weights.popularity - b.weights.popularity) ||
+           (a.weights.strLength - b.weights.strLength);
+  })
+
+  return rankedProps;
+};
+
+const Hayaku = {
+  expandProps: expandProps
+}
+
+module.exports = Hayaku;