15 lines
431 B
TypeScript
15 lines
431 B
TypeScript
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/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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export function extractAvgColorFromBlurhash(hash: string) {
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return typeof hash === 'string'
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? '#' + [...hash.slice(2, 6)]
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.map(x => '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz#$%*+,-.:;=?@[]^_{|}~'.indexOf(x))
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.reduce((a, c) => a * 83 + c, 0)
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.toString(16)
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.padStart(6, '0')
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: undefined;
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}
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