northwind-rest-api/backend/helpers/image-helper.js

Local REST API Exposing 'Northwind Traders' Database.

const locations = require("../helpers/locations");
const uuid = require("uuid").v4;
const fsPromises = require("fs/promises");
const fs = require("fs");

async function saveProductImage(image) {
    if (!image) return null;
    const extension = image.name.substring(image.name.lastIndexOf("."));
    const fileName = uuid() + extension;
    const absolutePath = locations.getProductImageFile(fileName);
    await image.mv(absolutePath);
    return fileName;
}

async function updateProductImage(currentFileName, newImage) {
    if(!newImage) return currentFileName;
    await deleteProductImage(currentFileName);
    const newFileName = await saveProductImage(newImage);
    return newFileName; 
}

async function deleteProductImage(fileName) {
    if (!fileName) return;
    const absolutePath = locations.getProductImageFile(fileName);
    if(!absolutePath) return;
    if(!fs.existsSync(absolutePath)) return;
    try {
        await fsPromises.unlink(absolutePath); 
    }
    catch (err) { }
}

async function saveEmployeeImage(image) {
    if (!image) return null;
    const extension = image.name.substring(image.name.lastIndexOf("."));
    const fileName = uuid() + extension;
    const absolutePath = locations.getEmployeeImageFile(fileName);
    await image.mv(absolutePath);
    return fileName;
}

async function updateEmployeeImage(currentFileName, newImage) {
    if(!newImage) return currentFileName;
    await deleteEmployeeImage(currentFileName);
    const newFileName = await saveEmployeeImage(newImage);
    return newFileName; 
}

async function deleteEmployeeImage(fileName) {
    if (!fileName) return;
    const absolutePath = locations.getEmployeeImageFile(fileName);
    if(!absolutePath) return;
    if(!fs.existsSync(absolutePath)) return;
    try {
        await fsPromises.unlink(absolutePath); 
    }
    catch (err) { }
}

async function saveSupplierImage(image) {
    if (!image) return null;
    const extension = image.name.substring(image.name.lastIndexOf("."));
    const fileName = uuid() + extension;
    const absolutePath = locations.getSupplierImageFile(fileName);
    await image.mv(absolutePath);
    return fileName;
}

async function updateSupplierImage(currentFileName, newImage) {
    if(!newImage) return currentFileName;
    await deleteSupplierImage(currentFileName);
    const newFileName = await saveSupplierImage(newImage);
    return newFileName; 
}

async function deleteSupplierImage(fileName) {
    if (!fileName) return;
    const absolutePath = locations.getSupplierImageFile(fileName);
    if(!absolutePath) return;
    if(!fs.existsSync(absolutePath)) return;
    try {
        await fsPromises.unlink(absolutePath); 
    }
    catch (err) { }
}

async function saveCategoryImage(image) {
    if (!image) return null;
    const extension = image.name.substring(image.name.lastIndexOf("."));
    const fileName = uuid() + extension;
    const absolutePath = locations.getCategoryImageFile(fileName);
    await image.mv(absolutePath);
    return fileName;
}

async function updateCategoryImage(currentFileName, newImage) {
    if(!newImage) return currentFileName;
    await deleteCategoryImage(currentFileName);
    const newFileName = await saveCategoryImage(newImage);
    return newFileName; 
}

async function deleteCategoryImage(fileName) {
    if (!fileName) return;
    const absolutePath = locations.getCategoryImageFile(fileName);
    if(!absolutePath) return;
    if(!fs.existsSync(absolutePath)) return;
    try {
        await fsPromises.unlink(absolutePath); 
    }
    catch (err) { }
}

module.exports = {
    saveProductImage,
    updateProductImage,
    deleteProductImage,
    saveEmployeeImage,
    updateEmployeeImage,
    deleteEmployeeImage,
    saveSupplierImage,
    updateSupplierImage,
    deleteSupplierImage,
    saveCategoryImage,
    updateCategoryImage,
    deleteCategoryImage
};