62 lines
1.4 KiB
TypeScript
62 lines
1.4 KiB
TypeScript
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// Copyright 2021 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 { MIMEType, IMAGE_JPEG } from '../types/MIME';
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import {
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InMemoryAttachmentDraftType,
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canBeTranscoded,
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} 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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const blurHash = await imageToBlurHash(file);
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const { contentType, file: resizedBlob, fileName } = await autoScale({
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contentType: file.type as MIMEType,
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fileName: file.name,
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file,
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});
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const data = await window.Signal.Types.VisualAttachment.blobToArrayBuffer(
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resizedBlob
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);
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return {
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fileName: fileName || file.name,
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contentType,
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data,
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size: data.byteLength,
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blurHash,
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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 = await scaleImageToLevel(file, true);
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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}.jpeg`,
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};
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}
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