100 lines
2.2 KiB
TypeScript
100 lines
2.2 KiB
TypeScript
import { Inject, Injectable } from '@nestjs/common';
|
|
import sharp from 'sharp';
|
|
import { DI } from '@/di-symbols.js';
|
|
import type { Config } from '@/config.js';
|
|
|
|
export type IImage = {
|
|
data: Buffer;
|
|
ext: string | null;
|
|
type: string;
|
|
};
|
|
|
|
@Injectable()
|
|
export class ImageProcessingService {
|
|
constructor(
|
|
@Inject(DI.config)
|
|
private config: Config,
|
|
) {
|
|
}
|
|
|
|
/**
|
|
* Convert to JPEG
|
|
* with resize, remove metadata, resolve orientation, stop animation
|
|
*/
|
|
public async convertToJpeg(path: string, width: number, height: number): Promise<IImage> {
|
|
return this.convertSharpToJpeg(await sharp(path), width, height);
|
|
}
|
|
|
|
public async convertSharpToJpeg(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
|
|
const data = await sharp
|
|
.resize(width, height, {
|
|
fit: 'inside',
|
|
withoutEnlargement: true,
|
|
})
|
|
.rotate()
|
|
.jpeg({
|
|
quality: 85,
|
|
progressive: true,
|
|
})
|
|
.toBuffer();
|
|
|
|
return {
|
|
data,
|
|
ext: 'jpg',
|
|
type: 'image/jpeg',
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Convert to WebP
|
|
* with resize, remove metadata, resolve orientation, stop animation
|
|
*/
|
|
public async convertToWebp(path: string, width: number, height: number, quality = 85): Promise<IImage> {
|
|
return this.convertSharpToWebp(await sharp(path), width, height, quality);
|
|
}
|
|
|
|
public async convertSharpToWebp(sharp: sharp.Sharp, width: number, height: number, quality = 85): Promise<IImage> {
|
|
const data = await sharp
|
|
.resize(width, height, {
|
|
fit: 'inside',
|
|
withoutEnlargement: true,
|
|
})
|
|
.rotate()
|
|
.webp({
|
|
quality,
|
|
})
|
|
.toBuffer();
|
|
|
|
return {
|
|
data,
|
|
ext: 'webp',
|
|
type: 'image/webp',
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Convert to PNG
|
|
* with resize, remove metadata, resolve orientation, stop animation
|
|
*/
|
|
public async convertToPng(path: string, width: number, height: number): Promise<IImage> {
|
|
return this.convertSharpToPng(await sharp(path), width, height);
|
|
}
|
|
|
|
public async convertSharpToPng(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
|
|
const data = await sharp
|
|
.resize(width, height, {
|
|
fit: 'inside',
|
|
withoutEnlargement: true,
|
|
})
|
|
.rotate()
|
|
.png()
|
|
.toBuffer();
|
|
|
|
return {
|
|
data,
|
|
ext: 'png',
|
|
type: 'image/png',
|
|
};
|
|
}
|
|
}
|