@damaazzyn/alisaa-js/system/exif.js

All class function for alisa script

const fs = require('fs')
const { tmpdir } = require('os')
const Crypto = require('crypto')
const ff = require('fluent-ffmpeg')
const webp = require('node-webpmux')
const path = require('path')

module.exports = class Exif {
 imageToWebp = async (media) => {
    let tmpFileOut = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    let tmpFileIn = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.jpg`)
    fs.writeFileSync(tmpFileIn, media)
    await new Promise((resolve, reject) => {
      ff(tmpFileIn)
        .on("error", reject)
        .on("end", () => resolve(true))
        .addOutputOptions([
          "-vcodec",
          "libwebp",
          "-vf",
          "scale=320:320:force_original_aspect_ratio=decrease,pad=320:320:(ow-iw)/2:(oh-ih)/2:color=white@0.0, split [a][b]; [a] palettegen=reserve_transparent=on:transparency_color=ffffff [p]; [b][p] paletteuse"
        ]).toFormat("webp").save(tmpFileOut)
    })
    let buff = fs.readFileSync(tmpFileOut)
    fs.unlinkSync(tmpFileOut)
    fs.unlinkSync(tmpFileIn)
    return buff
  }
  
  videoToWebp = async (media) => {
    let tmpFileOut = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    let tmpFileIn = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.mp4`)
    fs.writeFileSync(tmpFileIn, media)
    await new Promise((resolve, reject) => {
      ff(tmpFileIn)
        .on("error", reject)
        .on("end", () => resolve(true))
        .addOutputOptions([
          "-vcodec",
          "libwebp",
          "-vf",
          "scale=320:320:force_original_aspect_ratio=decrease,pad=320:320:(ow-iw)/2:(oh-ih)/2:color=white@0.0, split [a][b]; [a] palettegen=reserve_transparent=on:transparency_color=ffffff [p]; [b][p] paletteuse",
          "-loop", "0", "-ss", "00:00:00", "-t", "00:00:05",
          "-preset",
          "default",
          "-an",
          "-vsync",
          "0"
        ]).toFormat("webp").save(tmpFileOut)
    })
    let buff = fs.readFileSync(tmpFileOut)
    fs.unlinkSync(tmpFileOut)
    fs.unlinkSync(tmpFileIn)
    return buff
  }
  
  writeExifImg = async (media, metadata) => {
    let wMedia = await this.imageToWebp(media)
    let tmpFileIn = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    let tmpFileOut = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    fs.writeFileSync(tmpFileIn, wMedia)
    if (metadata.packname || metadata.author) {
      let img = new webp.Image()
      let json = {
        "sticker-pack-id": "Alisaa   -,",
        "sticker-pack-name": metadata.packname,
        "sticker-pack-publisher": metadata.author,
        "emojis": metadata.categories ? metadata.categories : [""],
        "is-avatar-sticker": metadata.isAvatar ? metadata.isAvatar : false
      }
      let exifAttr = Buffer.from([0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x41, 0x57, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00])
      let jsonBuff = Buffer.from(JSON.stringify(json), "utf-8")
      let exif = Buffer.concat([exifAttr, jsonBuff])
      exif.writeUIntLE(jsonBuff.length, 14, 4)
      await img.load(tmpFileIn)
      fs.unlinkSync(tmpFileIn)
      img.exif = exif
      await img.save(tmpFileOut)
      return tmpFileOut
    }
  }
  
  writeExifWebp = async (media, metadata) => {
    let tmpFileIn = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    let tmpFileOut = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    fs.writeFileSync(tmpFileIn, media)
    if (metadata.packname || metadata.author) {
      let img = new webp.Image()
      let json = {
        "sticker-pack-id": "Alisaa   -,",
        "sticker-pack-name": metadata.packname,
        "sticker-pack-publisher": metadata.author,
        "emojis": metadata.categories ? metadata.categories : [""],
        "is-avatar-sticker": metadata.isAvatar ? metadata.isAvatar : false
      }
      let exifAttr = Buffer.from([0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x41, 0x57, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00])
      let jsonBuff = Buffer.from(JSON.stringify(json), "utf-8")
      let exif = Buffer.concat([exifAttr, jsonBuff])
      exif.writeUIntLE(jsonBuff.length, 14, 4)
      await img.load(tmpFileIn)
      fs.unlinkSync(tmpFileIn)
      img.exif = exif
      await img.save(tmpFileOut)
      return tmpFileOut
    }
  }
  
 writeExifVid = async (media, metadata) => {
    let wMedia = await this.videoToWebp(media)
    let tmpFileIn = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    let tmpFileOut = path.join(tmpdir(), `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`)
    fs.writeFileSync(tmpFileIn, wMedia)
    if (metadata.packname || metadata.author) {
      let img = new webp.Image()
      let json = {
        "sticker-pack-id": "Alisaa   -,",
        "sticker-pack-name": metadata.packname,
        "sticker-pack-publisher": metadata.author,
        "emojis": metadata.categories ? metadata.categories : [""],
        "is-avatar-sticker": metadata.isAvatar ? metadata.isAvatar : false
      }
      let exifAttr = Buffer.from([0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x41, 0x57, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00])
      let jsonBuff = Buffer.from(JSON.stringify(json), "utf-8")
      let exif = Buffer.concat([exifAttr, jsonBuff])
      exif.writeUIntLE(jsonBuff.length, 14, 4)
      await img.load(tmpFileIn)
      fs.unlinkSync(tmpFileIn)
      img.exif = exif
      await img.save(tmpFileOut)
      return tmpFileOut
    }
  }
}