All files / services/compression compression.service.ts

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import { createReadStream, createWriteStream, stat, readdir } from 'fs';
import { createGzip, createGunzip } from 'zlib';
import { resolve } from 'path';
import { createDecipheriv, createCipheriv } from 'crypto';
import { Observable } from 'rxjs';
import { Service } from '../../container';
import { Injector } from '../../decorators/injector/injector.decorator';
import { ConfigService, PrivateCryptoModel } from '../config';
 
@Service()
export class CompressionService {
 
    @Injector(ConfigService) private config: ConfigService;
 
    public gZipFile(input: string, output: string, options: PrivateCryptoModel = { cyperIv: '', algorithm: '', cyperKey: '' }) {
        const config = this.config.config.experimental.crypto || options;
        return Observable.create(observer => {
            createReadStream(input)
                .pipe(createGzip())
                .pipe(createCipheriv(config.algorithm, config.cyperKey, config.cyperIv))
                .pipe(createWriteStream(output))
                .on('finish', () => observer.next(true))
                .on('error', (err) => observer.error(err));
        });
    }
 
    public readGzipFile(input: string, output: string, options: PrivateCryptoModel = { cyperIv: '', algorithm: '', cyperKey: '' }) {
        const config = this.config.config.experimental.crypto || options;
        return Observable.create(observer => {
            createReadStream(input)
                .pipe(createDecipheriv(config.algorithm, config.cyperKey, config.cyperIv))
                .pipe(createGunzip())
                .pipe(createWriteStream(output))
                .on('finish', () => observer.next(true))
                .on('error', (err) => observer.error(err));
        });
    }
 
}