@tasolutions/express-core/utils/upload.js

All libs for express

const _ = require('lodash');
const stringHelper = require('./string.helper');
const { validate, upload } = require('./s3Upload');
const { uploadInfo } = require('../config');

module.exports = {

    /**
     * This function upload file
     */
    uploadFiles: async (req, Collection, type = uploadInfo.type) => {
        const collectionName = Collection.collection.collectionName;
        const folder = collectionName ? `${collectionName}` : '';

        await Promise.all(
            _.map(_.keysIn(req.files), async (key) => {
                let field_data = req.files[key];
                const path = Collection.schema.path(key);
                const isInstance = path.instance;
                // check files is array or object
                if (field_data) {
                    if (_.isArray(field_data)) {
                        // insert multiple images
                        let data = [];
                        // loop all files
                        await Promise.all(
                            _.map(_.keysIn(field_data), async (key) => {
                                let photo = field_data[key];

                                if (!photo || photo.size === 0) {
                                    throw new Error(`File ${photo.name} is invalid or empty.`);
                                }

                                let file_name = `${folder}/${stringHelper.randomImageName()}-${photo.name}`;
                                if (type === 'S3') {
                                    photo.folder_path = folder;
                                    let { data } = await validate(photo);
                                    const uploadRes = await upload(data);
                                    file_name = uploadRes.Location;
                                } else {
                                    photo.mv(`./uploads/${file_name}`);
                                }
                                data.push(file_name);
                            })
                        );
                        // req.body[key] = data;
                        if (isInstance == 'Array') {
                            req.body[`${key}`] = req.body[`${key}`] ? req.body[`${key}`] : [];
                            req.body[`${key}`] = req.body[`${key}`].concat(data);
                        } else {
                            req.body[`${key}`] = data;
                        }
                    } else {
                        if (field_data.size === 0) {
                            throw new Error(`File ${field_data.name} is invalid or empty.`);
                        }
                        // insert one image
                        let file_name = `${folder}/${stringHelper.randomImageName()}-${field_data.name}`;
                        if (type === 'S3') {
                            field_data.folder_path = folder;
                            let { data } = await validate(field_data);
                            const uploadRes = await upload(data);
                            file_name = uploadRes.Location;
                        } else {
                            field_data.mv(`./uploads/${file_name}`);
                        }
                        // req.body[key] = file_name;
                        if (isInstance == 'Array') {
                            req.body[`${key}`] = req.body[`${key}`] ? _.isArray(req.body[`${key}`]) ? req.body[`${key}`] : [req.body[`${key}`]] : [];
                            req.body[`${key}`].push(file_name);
                        } else {
                            req.body[`${key}`] = file_name;
                            req.body[`${key}_name`] = field_data.name;
                        }
                    }
                }
            })
        );

        return req.body;
    }

}