22 lines
715 B
JavaScript
22 lines
715 B
JavaScript
'use strict';
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const config = require('config');
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// pick {photoLimit} photos evenly distributed photos from a set with {photoTotal} photos, return array of indexes starting at 1
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function pluckPhotos(photos, release, specifiedLimit) {
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const limit = specifiedLimit || config.media.limit;
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if (photos.length <= limit) {
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return photos;
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}
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const plucked = [1]
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.concat(
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Array.from({ length: limit }, (value, index) => Math.round((index + 1) * (photos.length / (limit)))),
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);
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return Array.from(new Set(plucked)).map(photoIndex => photos[photoIndex - 1]); // remove duplicates, may happen when photo total and photo limit are close
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}
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module.exports = pluckPhotos;
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