35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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const groupBy = require('lodash').groupBy;
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const mime = require('mime');
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/**
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* Since there are no officially registered MIME types
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* for ttf/otf yet http://www.iana.org/assignments/media-types/media-types.xhtml,
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* we define two non-standard ones for the sake of parsing
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*/
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mime.define({
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'font/opentype': ['otf'],
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'font/truetype': ['ttf'],
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});
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/**
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* Given an array of files, it groups it by it's type.
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* Type of the file is inferred from it's mimetype based on the extension
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* file ends up with. The returned value is an object with properties that
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* correspond to the first part of the mimetype, e.g. images will be grouped
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* under `image` key since the mimetype for them is `image/jpg` etc.
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*
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* Example:
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* Given an array ['fonts/a.ttf', 'images/b.jpg'],
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* the returned object will be: {font: ['fonts/a.ttf'], image: ['images/b.jpg']}
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*/
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module.exports = function groupFilesByType(assets) {
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return groupBy(assets, type => mime.lookup(type).split('/')[0]);
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};
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