24 lines
603 B
JavaScript
24 lines
603 B
JavaScript
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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function randomID() {
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let rand = '';
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for (let i = 0; i < 12; i++) {
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rand += chars.charAt(Math.floor((Math.random() * chars.length)));
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}
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return rand;
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}
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function* checkId(Files, fileId, attempts) {
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if (attempts > 10) {
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return false;
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}
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const file = yield Files.findOne({'_id': fileId});
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if (file === null) {
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return fileId;
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}
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return checkId(randomID(), ++attempts); // eslint-disable-line no-param-reassign
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}
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export default function* (Files) {
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return yield checkId(Files, randomID(), 0);
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}
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