Strapi Upload Plugin Middleware, change format of avif file to webp to support multiple file formats

strapi-upload-plugin-middleware

/**
 * `upload-plugin` middleware
 */
import * as fs from 'fs';
import type { Core } from '@strapi/strapi';
import sharp from 'sharp';
import formidable, { PersistentFile } from 'formidable';
import path from 'path'; 
import { Context } from 'koa'

export default (config, { strapi }: { strapi: Core.Strapi }) => { 
  return async (ctx: Context, next) => {

    if (ctx.request.path === '/api/upload' && ctx.request.method === 'POST') { 

      // Example: Rename files before they are processed
      // console.log("Array.isArray(ctx.request.files) ", Array.isArray(ctx.request.files));
      const files: formidable.File[] = Array.isArray(ctx.request.files.files) ? ctx.request.files.files : [ctx.request.files.files];
      try {
        //Prevent having unlink or busy errors on windows platform.
        sharp.cache({ files: 0 });
        console.log("files length", files.length);
        var files_formatted = await Promise.all(files.map(async e => {
          // console.log(e.filepath, e);
          // console.log("logged",e);

          if (e.mimetype != "image/avif") return e;

          var newFilePath = e.filepath;
          var data = fs.readFileSync(e.filepath);

          //generate file and post it on new file path
          await sharp(data)
            .toFormat("webp")
            .toFile(newFilePath);

          var converted = fs.readFileSync(newFilePath);

          const formFile: formidable.File = {
            size: converted.length,
            originalFilename: path.basename(e.originalFilename),
            filepath: newFilePath,
            newFilename: path.basename(newFilePath),
            hashAlgorithm: null,
            mimetype: "image/webp",
            toJSON: null
          };

          var pf = new PersistentFile(formFile);
          // console.log("Persitent!!!",pf);
          return pf;

          return formFile;
        }));

        ctx.request.files.files = null

        //@ts-ignore
        ctx.request.files.files = files_formatted;

        console.log("var data", ctx.request.files);
      } catch (err) {
        console.error(err);
      }
    }

    strapi.log.info('In upload-plugin middleware.');

    await next();
  };
};