WIP - add extractor, generate snippet_data

node_modules/srcset/index.js

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+'use strict';
+var numberIsNan = require('number-is-nan');
+var arrayUniq = require('array-uniq');
+var reInt = /^\d+$/;
+
+function deepUnique(arr) {
+	return arr.sort().filter(function (el, i) {
+		return JSON.stringify(el) !== JSON.stringify(arr[i - 1]);
+	});
+}
+
+exports.parse = function (str) {
+	return deepUnique(str.split(',').map(function (el) {
+		var ret = {};
+
+		el.trim().split(/\s+/).forEach(function (el, i) {
+			if (i === 0) {
+				return ret.url = el;
+			}
+
+			var value = el.substring(0, el.length - 1);
+			var postfix = el[el.length - 1];
+			var intVal = parseInt(value, 10);
+			var floatVal = parseFloat(value);
+
+			if (postfix === 'w' && reInt.test(value)) {
+				ret.width = intVal;
+			} else if (postfix === 'h' && reInt.test(value)) {
+				ret.height = intVal;
+			} else if (postfix === 'x' && !numberIsNan(floatVal)) {
+				ret.density = floatVal;
+			} else {
+				throw new Error('Invalid srcset descriptor: ' + el + '.');
+			}
+		});
+
+		return ret;
+	}));
+}
+
+exports.stringify = function (arr) {
+	return arrayUniq(arr.map(function (el) {
+		if (!el.url) {
+			throw new Error('URL is required.');
+		}
+
+		var ret = [el.url];
+
+		if (el.width) {
+			ret.push(el.width + 'w');
+		}
+
+		if (el.height) {
+			ret.push(el.height + 'h');
+		}
+
+		if (el.density) {
+			ret.push(el.density + 'x');
+		}
+
+		return ret.join(' ');
+	})).join(', ');
+}

node_modules/srcset/license

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+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

node_modules/srcset/package.json

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+{
+  "_from": "srcset@^1.0.0",
+  "_id": "srcset@1.0.0",
+  "_inBundle": false,
+  "_integrity": "sha1-pWad4StC87HV6D7QPHEEb8SPQe8=",
+  "_location": "/srcset",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "srcset@^1.0.0",
+    "name": "srcset",
+    "escapedName": "srcset",
+    "rawSpec": "^1.0.0",
+    "saveSpec": null,
+    "fetchSpec": "^1.0.0"
+  },
+  "_requiredBy": [
+    "/sanitize-html"
+  ],
+  "_resolved": "https://registry.npmjs.org/srcset/-/srcset-1.0.0.tgz",
+  "_shasum": "a5669de12b42f3b1d5e83ed03c71046fc48f41ef",
+  "_spec": "srcset@^1.0.0",
+  "_where": "/Users/stefanfejes/Projects/30-seconds-of-python-code/node_modules/sanitize-html",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "bugs": {
+    "url": "https://github.com/sindresorhus/srcset/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "array-uniq": "^1.0.2",
+    "number-is-nan": "^1.0.0"
+  },
+  "deprecated": false,
+  "description": "Parse and stringify the HTML <img> srcset attribute",
+  "devDependencies": {
+    "mocha": "*"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "files": [
+    "index.js"
+  ],
+  "homepage": "https://github.com/sindresorhus/srcset#readme",
+  "keywords": [
+    "html",
+    "attribute",
+    "image",
+    "img",
+    "src",
+    "parse",
+    "stringify",
+    "srcset",
+    "responsive",
+    "picture",
+    "element"
+  ],
+  "license": "MIT",
+  "name": "srcset",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/sindresorhus/srcset.git"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "version": "1.0.0"
+}

node_modules/srcset/readme.md

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+# srcset [![Build Status](https://travis-ci.org/sindresorhus/srcset.svg?branch=master)](https://travis-ci.org/sindresorhus/srcset)
+
+> Parse and stringify the HTML `<img>` [srcset](http://mobile.smashingmagazine.com/2013/08/21/webkit-implements-srcset-and-why-its-a-good-thing/) attribute.
+
+Useful if you're creating a polyfill, build-tool, etc.
+
+
+## Install
+
+```
+$ npm install --save srcset
+```
+
+
+## Usage
+
+How an image with `srcset` might look like:
+
+```html
+<img alt="The Breakfast Combo"
+     src="banner.jpg"
+     srcset="banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x">
+```
+
+Then have some fun with it:
+
+```js
+var srcset = require('srcset');
+
+var parsed = srcset.parse('banner-HD.jpg 2x, banner-phone.jpg 100w');
+console.log(parsed);
+/*
+[
+	{ url: 'banner-HD.jpg', density: 2 },
+	{ url: 'banner-phone.jpg', width: 100 }
+]
+*/
+
+parsed.push({ url: 'banner-phone-HD.jpg', width: 100, density: 2 });
+
+var stringified = srcset.stringify(parsed);
+console.log(stringified);
+/*
+banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x
+*/
+```
+
+
+## API
+
+### .parse()
+
+Accepts a srcset string and returns an array of objects with the possible properties: `url` (always), `width`, `height`, `density`.
+
+### .stringify()
+
+Accepts an array of objects with the possible properties: `url` (required), `width`, `height`, `density` and returns a srcset string.
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)