#11 - TypeScript

Author: Sac-Corts

Roadmap/11 - MANEJO DE FICHEROS/typescript/Sac-Corts.ts

@@ -0,0 +1,167 @@
+import * as fs from 'fs';
+import * as readline from 'readline';
+
+const githubUser = 'Sac-Corts';
+const fileName = `${githubUser}.txt`;
+const data = `Name: Isaac\nAge: 22\nProgramming Language: TypeScript`;
+
+fs.writeFileSync(fileName, data, 'utf8');
+console.log('File created and data written');
+
+const fileContent = fs.readFileSync(fileName, 'utf8');
+console.log('File content:');
+console.log(fileContent);
+
+fs.unlinkSync(fileName);
+console.log(`File ${fileName} deleted`);
+
+// ** Extra Exercise ** //
+const file = 'products.txt';
+
+const readData = (): string[] => {
+    try {
+        const data = fs.readFileSync(file, 'utf8');
+        return data.split('\n').filter(line => line.trim() !== '');
+    } catch (err) {
+        return [];
+    }
+};
+
+const writeData = (data: string[]): void => {
+    fs.writeFileSync(file, data.join('\n'), 'utf8');
+};
+
+const addProduct = (name: string, quantity: string, price: string): void => {
+    const data = readData();
+    data.push(`${name}, ${quantity}, ${price}`);
+    writeData(data);
+    console.log('Product added successfully.');
+};
+
+const viewProduct = (name: string): void => {
+    const data = readData();
+    const product = data.find(line => line.startsWith(name));
+    if (product) {
+        console.log(`Product found: ${product}`);
+    } else {
+        console.log('Product not found.');
+    }
+};
+
+const updateProduct = (name: string, quantity: string, price: string): void => {
+    const data = readData();
+    const index = data.findIndex(line => line.startsWith(name));
+    if (index !== -1) {
+        data[index] = `${name}, ${quantity}, ${price}`;
+        writeData(data);
+        console.log('Product updated successfully.');
+    } else {
+        console.log('Product not found.');
+    }
+};
+
+const deleteProduct = (name: string): void => {
+    const data = readData();
+    const newData = data.filter(line => !line.startsWith(name));
+    if (data.length !== newData.length) {
+        writeData(newData);
+        console.log('Product deleted successfully.');
+    } else {
+        console.log('Product not found.');
+    }
+};
+
+const calculateTotalSales = (): void => {
+    const data = readData();
+    let total = 0;
+    data.forEach(line => {
+        const [, quantity, price] = line.split(', ');
+        total += parseInt(quantity) * parseFloat(price);
+    });
+    console.log(`Total sales: ${total.toFixed(2)}`);
+};
+
+const calculateProductSales = (name: string): void => {
+    const data = readData();
+    const product = data.find(line => line.startsWith(name));
+    if (product) {
+        const [, quantity, price] = product.split(', ');
+        const sales = parseInt(quantity) * parseFloat(price);
+        console.log(`Sales for ${name}: ${sales.toFixed(2)}`);
+    } else {
+        console.log('Product not found.');
+    }
+};
+
+const clearFile = (): void => {
+    if (fs.existsSync(file)) {
+        fs.unlinkSync(file);
+        console.log('File cleared.');
+    } else {
+        console.log('File does not exist.');
+    }
+};
+
+const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout
+});
+
+const main = (): void => {
+    rl.question('Choose an option: (add/view/update/delete/total/individual/exit) ', (option) => {
+        switch (option.toLowerCase()) {
+            case 'add':
+                rl.question('Enter product name: ', (name) => {
+                    rl.question('Enter quantity sold: ', (quantity) => {
+                        rl.question('Enter price: ', (price) => {
+                            addProduct(name, quantity, price);
+                            main();
+                        });
+                    });
+                });
+                break;
+            case 'view':
+                rl.question('Enter product name: ', (name) => {
+                    viewProduct(name);
+                    main();
+                });
+                break;
+            case 'update':
+                rl.question('Enter product name: ', (name) => {
+                    rl.question('Enter new quantity sold: ', (quantity) => {
+                        rl.question('Enter new price: ', (price) => {
+                            updateProduct(name, quantity, price);
+                            main();
+                        });
+                    });
+                });
+                break;
+            case 'delete':
+                rl.question('Enter product name: ', (name) => {
+                    deleteProduct(name);
+                    main();
+                });
+                break;
+            case 'total':
+                calculateTotalSales();
+                main();
+                break;
+            case 'individual':
+                rl.question('Enter product name: ', (name) => {
+                    calculateProductSales(name);
+                    main();
+                });
+                break;
+            case 'exit':
+                clearFile();
+                rl.close();
+                break;
+            default:
+                console.log('Invalid option. Please try again.');
+                main();
+                break;
+        }
+    });
+};
+
+main();