34 lines
974 B
JavaScript
34 lines
974 B
JavaScript
'use strict';
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const got = require('got');
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const uniqueRandomArray = require('unique-random-array');
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const randomCache = {};
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function formatResult(getRandomImage) {
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const imageData = getRandomImage();
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if (!imageData) {
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return;
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}
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return `http://imgur.com/${imageData.hash}${imageData.ext.replace(/\?.*/, '')}`;
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}
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function storeResults(images, subreddit) {
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const getRandomImage = uniqueRandomArray(images);
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randomCache[subreddit] = getRandomImage;
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return getRandomImage;
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}
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module.exports = function (subreddit) {
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subreddit = (typeof subreddit === 'string' && subreddit.length !== 0) ? subreddit : 'puppies';
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if (randomCache[subreddit]) {
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return Promise.resolve(formatResult(randomCache[subreddit]));
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}
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return got(`https://imgur.com/r/${subreddit}/hot.json`, {json: true})
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.then(response => storeResults(response.body.data, subreddit))
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.then(getRandomImage => formatResult(getRandomImage));
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};
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