tweb/src/helpers/getStrippedThumbIfNeeded.ts

34 lines
1.2 KiB
TypeScript

/*
* https://github.com/morethanwords/tweb
* Copyright (C) 2019-2021 Eduard Kuzmenko
* https://github.com/morethanwords/tweb/blob/master/LICENSE
*/
import type {MyDocument} from '../lib/appManagers/appDocsManager';
import type {MyPhoto} from '../lib/appManagers/appPhotosManager';
import {THUMB_TYPE_FULL} from '../lib/mtproto/mtproto_config';
import type {ThumbCache} from '../lib/storages/thumbs';
import getImageFromStrippedThumb from './getImageFromStrippedThumb';
export default function getStrippedThumbIfNeeded(photo: MyPhoto | MyDocument, cacheContext: ThumbCache, useBlur: boolean, ignoreCache = false) {
const isVideo = (['video', 'gif'] as MyDocument['type'][]).includes((photo as MyDocument).type);
if(!cacheContext.downloaded || isVideo || ignoreCache) {
if(
photo._ === 'document' &&
cacheContext.downloaded &&
!ignoreCache &&
(!isVideo || cacheContext.type !== THUMB_TYPE_FULL)
) {
return null;
}
const sizes = (photo as MyPhoto).sizes || (photo as MyDocument).thumbs;
const thumb = sizes?.length ? sizes.find((size) => size._ === 'photoStrippedSize') : null;
if(thumb && ('bytes' in thumb)) {
return getImageFromStrippedThumb(photo, thumb as any, useBlur);
}
}
return null;
}