76 lines
2.1 KiB
TypeScript
76 lines
2.1 KiB
TypeScript
import type { ApiAttachment } from '../../../../api/types';
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import {
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SUPPORTED_AUDIO_CONTENT_TYPES,
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SUPPORTED_IMAGE_CONTENT_TYPES,
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SUPPORTED_VIDEO_CONTENT_TYPES,
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} from '../../../../config';
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import { parseAudioMetadata } from '../../../../util/audio';
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import {
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preloadImage,
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preloadVideo,
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createPosterForVideo,
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fetchBlob,
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} from '../../../../util/files';
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import { scaleImage } from '../../../../util/imageResize';
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const MAX_QUICK_IMG_SIZE = 1280; // px
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const FILE_EXT_REGEX = /\.[^/.]+$/;
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export default async function buildAttachment(
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filename: string, blob: Blob, isQuick: boolean, options?: Partial<ApiAttachment>,
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): Promise<ApiAttachment> {
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const blobUrl = URL.createObjectURL(blob);
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const { type: mimeType, size } = blob;
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let quick;
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let audio;
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let previewBlobUrl;
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if (SUPPORTED_IMAGE_CONTENT_TYPES.has(mimeType)) {
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if (isQuick) {
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const img = await preloadImage(blobUrl);
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const { width, height } = img;
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if (width > MAX_QUICK_IMG_SIZE || height > MAX_QUICK_IMG_SIZE || mimeType !== 'image/jpeg') {
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const resizedUrl = await scaleImage(blobUrl, MAX_QUICK_IMG_SIZE / Math.max(width, height), 'image/jpeg');
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URL.revokeObjectURL(blobUrl);
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const newBlob = await fetchBlob(resizedUrl);
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return buildAttachment(filename, newBlob, true, options);
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}
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if (mimeType === 'image/jpeg') {
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filename = filename.replace(FILE_EXT_REGEX, '.jpg');
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}
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quick = { width, height };
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} else {
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previewBlobUrl = blobUrl;
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}
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} else if (SUPPORTED_VIDEO_CONTENT_TYPES.has(mimeType)) {
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const { videoWidth: width, videoHeight: height, duration } = await preloadVideo(blobUrl);
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quick = { width, height, duration };
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previewBlobUrl = await createPosterForVideo(blobUrl);
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} else if (SUPPORTED_AUDIO_CONTENT_TYPES.has(mimeType)) {
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const {
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duration, title, performer, coverUrl,
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} = await parseAudioMetadata(blobUrl);
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audio = {
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duration: duration || 0,
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title,
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performer,
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};
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previewBlobUrl = coverUrl;
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}
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return {
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blobUrl,
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filename,
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mimeType,
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size,
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quick,
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audio,
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previewBlobUrl,
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...options,
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};
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}
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