upload file to azure blob storage via multer and multer-azure-blob-storage

uploadFileToAzure.js

const path = require("path");
const multer = require("multer");
const MulterAzureStorage = require('multer-azure-blob-storage').MulterAzureStorage;
const { ApiResponse, generateString } = require("../helpers");
require("dotenv").config()

//upload to azure blob storage
const resolveBlobName = (req, file) => {
    return new Promise((resolve, reject) => {
        const blobName = generateString(20) + path.extname(file.originalname);
        req.body.image = blobName;
        resolve(blobName);
    });
};

const resolveMetadata = (req, file) => {
    return new Promise((resolve, reject) => {
        const metadata = { author: "John Doe", album: "ASOT" };
        resolve(metadata);
    });
};

const resolveContentSettings = (req, file) => {
    return new Promise((resolve, reject) => {
        // const contentSettings = yourCustomLogic(req, file);
        const contentSettings = "";
        resolve(contentSettings);
    });
};

const azureStorage = new MulterAzureStorage({
    connectionString: process.env.AZURE_STORAGE_CONNECTION_STRING,
    accessKey: process.env.AZURE_STORAGE_ACCESS_KEY,
    accountName: process.env.AZURE_STORAGE_ACCOUNT_NAME,
    containerName: process.env.AZURE_BLOB_CONTAINER_NAME,
    blobName: resolveBlobName,
    metadata: resolveMetadata,
    contentSettings: resolveContentSettings,
    // containerAccessLevel: 'blob',
});

exports.uploadToAzureBlob = multer({
    storage: azureStorage
}).single("image")