student.js

import inquirer from "inquirer";
let studentSystem = [];
while (true) {
    let options = await inquirer.prompt([
        {
            type: "list",
            name: "selection",
            message: "What would you like to do?",
            choices: ["Add_Student", "Remove_Student", "View_Students", "See_Details", "Exit"]
        }
    ]);
    if (options.selection === "Add_Student") {
        let newStudentName = await inquirer.prompt({
            type: "input",
            name: "name",
            message: "Enter the student's name: "
        });
        let newStudentAge = await inquirer.prompt({
            type: "number",
            name: "age",
            message: "Enter the student's age: "
        });
        let newStudentId = await inquirer.prompt({
            type: "number",
            name: "id",
            message: "Enter the student's ID: "
        });
        // Check for duplicate ID
        let duplicateId = studentSystem.find(student => student.id === newStudentId.id);
        if (duplicateId) {
            console.log("This ID is already in use. Please enter a unique ID.");
        }
        else {
            let student = {
                name: newStudentName.name,
                age: newStudentAge.age,
                id: newStudentId.id
            };
            studentSystem.push(student);
        }
    }
    else if (options.selection === "View_Students") {
        if (studentSystem.length === 0) {
            console.log("The list is empty");
        }
        else {
            let studentList = studentSystem.map(student => student.name).join("\n");
            console.log(studentList);
        }
    }
    else if (options.selection === "Remove_Student") {
        let removeOption = await inquirer.prompt([
            {
                type: "list",
                name: "removelist",
                message: "How do you want to remove the student?",
                choices: ["Find from list", "Search by ID"]
            }
        ]);
        if (removeOption.removelist === "Find from list") {
            let studentList = studentSystem.map(student => student.name);
            let removeStudentByList = await inquirer.prompt([
                {
                    type: "list",
                    name: "removeByList",
                    message: "Which student do you want to remove?",
                    choices: studentList
                }
            ]);
            const index = studentSystem.findIndex(student => student.name === removeStudentByList.removeByList);
            if (index !== -1) {
                console.log(`${studentSystem[index].name} has been removed from the list`);
                studentSystem.splice(index, 1);
            }
        }
        if (removeOption.removelist === "Search by ID") {
            let removeStudentByID = await inquirer.prompt([
                {
                    type: "input",
                    name: "removeByID",
                    message: "Enter the student's ID: "
                }
            ]);
            const index = studentSystem.findIndex(student => student.id === Number(removeStudentByID.removeByID));
            if (index !== -1) {
                console.log(`Student with ID ${studentSystem[index].id} has been removed from the list`);
                studentSystem.splice(index, 1);
            }
        }
    }
    else if (options.selection === "See_Details") {
        if (studentSystem.length === 0) {
            console.log("The list is empty");
        }
        else {
            console.log(studentSystem
                .map(student => `Name: ${student.name}, Age: ${student.age}, Student ID: ${student.id}`)
                .join("\n"));
        }
    }
    if (options.selection === "Exit") {
        break;
    }
}