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