104 lines
2.4 KiB
TypeScript
104 lines
2.4 KiB
TypeScript
// Copyright 2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import path from 'path';
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import { ipcRenderer } from 'electron';
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import { v4 as genUuid } from 'uuid';
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import { blobToArrayBuffer } from '../types/VisualAttachment';
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import type { MIMEType } from '../types/MIME';
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import { IMAGE_JPEG, isHeic, stringToMIMEType } from '../types/MIME';
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import type { InMemoryAttachmentDraftType } from '../types/Attachment';
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import { canBeTranscoded } from '../types/Attachment';
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import { imageToBlurHash } from './imageToBlurHash';
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import { scaleImageToLevel } from './scaleImageToLevel';
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export async function handleImageAttachment(
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file: File
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): Promise<InMemoryAttachmentDraftType> {
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let processedFile: File | Blob = file;
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if (isHeic(file.type, file.name)) {
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const uuid = genUuid();
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const bytes = new Uint8Array(await file.arrayBuffer());
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const convertedFile = await new Promise<File>((resolve, reject) => {
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ipcRenderer.once(`convert-image:${uuid}`, (_, { error, response }) => {
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if (response) {
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resolve(response);
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} else {
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reject(error);
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}
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});
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ipcRenderer.send('convert-image', uuid, bytes);
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});
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processedFile = new Blob([convertedFile]);
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}
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const {
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contentType,
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file: resizedBlob,
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fileName,
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} = await autoScale({
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contentType: isHeic(file.type, file.name)
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? IMAGE_JPEG
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: stringToMIMEType(file.type),
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fileName: file.name,
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file: processedFile,
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});
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const data = await blobToArrayBuffer(resizedBlob);
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const blurHash = await imageToBlurHash(resizedBlob);
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return {
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blurHash,
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contentType,
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data: new Uint8Array(data),
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fileName: fileName || file.name,
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path: file.name,
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pending: false,
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size: data.byteLength,
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};
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}
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export async function autoScale({
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contentType,
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file,
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fileName,
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}: {
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contentType: MIMEType;
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file: File | Blob;
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fileName: string;
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}): Promise<{
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contentType: MIMEType;
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file: Blob;
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fileName: string;
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}> {
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if (!canBeTranscoded({ contentType })) {
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return { contentType, file, fileName };
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}
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const { blob, contentType: newContentType } = await scaleImageToLevel(
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file,
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contentType,
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file.size,
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true
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);
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if (newContentType !== IMAGE_JPEG) {
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return {
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contentType,
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file: blob,
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fileName,
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};
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}
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const { name } = path.parse(fileName);
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return {
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contentType: IMAGE_JPEG,
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file: blob,
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fileName: `${name}.jpg`,
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};
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}
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