144 lines
3.2 KiB
TypeScript
144 lines
3.2 KiB
TypeScript
import { Inject, Injectable } from '@nestjs/common';
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import sharp from 'sharp';
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import { DI } from '@/di-symbols.js';
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import type { Config } from '@/config.js';
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export type IImage = {
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data: Buffer;
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ext: string | null;
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type: string;
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};
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export type IImageStream = {
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data: Readable;
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ext: string | null;
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type: string;
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};
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export type IImageStreamable = IImage | IImageStream;
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export const webpDefault: sharp.WebpOptions = {
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quality: 85,
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alphaQuality: 95,
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lossless: false,
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nearLossless: false,
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smartSubsample: true,
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mixed: true,
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};
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import { bindThis } from '@/decorators.js';
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import { Readable } from 'node:stream';
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@Injectable()
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export class ImageProcessingService {
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constructor(
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@Inject(DI.config)
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private config: Config,
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) {
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}
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/**
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* Convert to JPEG
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* with resize, remove metadata, resolve orientation, stop animation
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*/
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@bindThis
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public async convertToJpeg(path: string, width: number, height: number): Promise<IImage> {
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return this.convertSharpToJpeg(await sharp(path), width, height);
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}
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@bindThis
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public async convertSharpToJpeg(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
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const data = await sharp
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.resize(width, height, {
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fit: 'inside',
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withoutEnlargement: true,
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})
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.rotate()
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.jpeg({
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quality: 85,
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progressive: true,
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})
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.toBuffer();
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return {
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data,
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ext: 'jpg',
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type: 'image/jpeg',
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};
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}
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/**
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* Convert to WebP
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* with resize, remove metadata, resolve orientation, stop animation
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*/
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@bindThis
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public async convertToWebp(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): Promise<IImage> {
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return this.convertSharpToWebp(sharp(path), width, height, options);
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}
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@bindThis
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public async convertSharpToWebp(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): Promise<IImage> {
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const data = await sharp
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.resize(width, height, {
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fit: 'inside',
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withoutEnlargement: true,
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})
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.rotate()
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.webp(options)
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.toBuffer();
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return {
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data,
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ext: 'webp',
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type: 'image/webp',
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};
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}
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@bindThis
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public convertToWebpStream(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageStream {
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return this.convertSharpToWebpStream(sharp(path), width, height, options);
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}
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@bindThis
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public convertSharpToWebpStream(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageStream {
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const data = sharp
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.resize(width, height, {
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fit: 'inside',
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withoutEnlargement: true,
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})
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.rotate()
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.webp(options);
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return {
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data,
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ext: 'webp',
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type: 'image/webp',
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};
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}
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/**
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* Convert to PNG
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* with resize, remove metadata, resolve orientation, stop animation
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*/
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@bindThis
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public async convertToPng(path: string, width: number, height: number): Promise<IImage> {
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return this.convertSharpToPng(await sharp(path), width, height);
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}
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@bindThis
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public async convertSharpToPng(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
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const data = await sharp
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.resize(width, height, {
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fit: 'inside',
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withoutEnlargement: true,
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})
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.rotate()
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.png()
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.toBuffer();
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return {
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data,
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ext: 'png',
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type: 'image/png',
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};
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}
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}
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