All files service.js

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import fs from 'fs'
import fsPromises from 'fs/promises'
 
import config from './config.js'
import {
  join,
  extname
} from 'path'
const {
  dir: {
    publicDirectory
  }
} = config
export class Service {
  createFileStream(filename) {
    return fs.createReadStream(filename)
  }
 
  async getFileInfo(file) {
    // file = home/index.html
    const fullFilePath = join(publicDirectory, file)
    // valida se existe, se não existe estoura erro!!
    await fsPromises.access(fullFilePath)
    const fileType = extname(fullFilePath)
    return {
      type: fileType,
      name: fullFilePath
    }
  }
 
  async getFileStream(file) {
    const {
      name,
      type
    } = await this.getFileInfo(file)
    return {
      stream: this.createFileStream(name),
      type
    }
  }
}