saurav_recursionTask.html

<script>
	var userData = [];
	var numReg = /^\d+$/;
	var id = 101;

	var adminList = [
		{ id: 1, name: "saurav", password: 123456, status: 1 },
		{ id: 2, name: "keshav", password: 123456, status: 1 },
	];

	function checklen(inp, len) {
		//-------------------------------Check Length--------------------------------------

		var inputString = prompt(inp);
		if (inputString.length < len) {
			inputString = checklen(inp, len);
		}
		return inputString;
	}

	function checkNum(inp) {
		//-------------------------------Check Number--------------------------------------

		var num = prompt(inp);
		if (!num.match(numReg)) {
			num = checkNum(inp);
		}
		return parseInt(num);
	}

	function userOperation(userObject) {
		//-------------------------------User Operation--------------------------------------

		var userChoice = checkNum(
			"What's your user role ? \n1. WithDraw \n2. Deposit \n3. Show Balance \n4. Exit"
		);
		switch (userChoice) {
			case 1:
				//-------------------------WithDraw------------------------------
				var withDrawAmount = checkNum("Enter WithDraw Amount: ");
				if (userObject.accountBalance < withDrawAmount) {
					alert("Insufficient Balance!");
				} else {
					userObject.accountBalance -= withDrawAmount;
					alert("WithDrawed Successfully, Amount has been debited!");
				}
				break;

			case 2:
				//---------------------------Deposit------------------------------
				var depositAmount = checkNum("Enter Deposit Amount: ");
				userObject.accountBalance += depositAmount;
				alert("Deposited Successfully, Amount has been credited!");
				break;

			case 3:
				//-------------------------Show Balance------------------------------
				alert(
					"Account Number= " +
						userObject.accountNumber +
						"\nAccount Balance= " +
						userObject.accountBalance
				);
				break;

			case 4:
				alert("Thank You!");
				return;
				break;

			default:
				alert("Please select appropriate choice. Thank You!");

				break;
		}
		userOperation(userObject);
	}

	function user() {
		//--------------------------------User---------------------------------------

		var flag = login(userData);

		if (flag == 0) {
			alert("Invalid User Name !!!");
		} else if (flag == 1) {
			alert("Wrong Password !!!");
		} else {
			userOperation(flag);
		}
	}

	function viewData() {
		//-------------------------------View--------------------------------------
		var outputString = "";
		for (var v of userData) {
			outputString +=
				"User Id: " +
				v.id +
				" - " +
				"User Name: " +
				v.name +
				" - " +
				"Full Name: " +
				v.fullName +
				"\n.Account Number: " +
				v.accountNumber +
				" - " +
				"Account Balance: " +
				v.accountBalance +
				" - " +
				"Status: " +
				v.status +
				"\n";
		}
		alert(outputString);
	}

	function manageUser() {
		//-----------------------Manage User---------------------
		viewData();
		var flag = -1;

		var approvalId = checkNum(
			"Which user you want to approve ? \n(Please enter the User Id): "
		);

		for (var i of userData) {
			if (approvalId == i.id && i.status == 0) {
				flag = 0;
				i.status = 1;
				var result = "";
				for (var j = 0; j < 16; j++) {
					result += Math.floor(Math.random() * 10);
				}
				i.accountNumber = result;
				alert("User Approved. Thank You!");
				break;
			} else if (approvalId == i.id && i.status == 1) {
				flag = 1;
				alert("User has been already Approved. Thank You!");
			}
		}
		if (flag == -1) {
			alert("Invalid User Id, Please enter a valid User Id!!");
		}
	}

	function adminOperation() {
		var adminChoice = checkNum(
			"What's your user role ? \n1. Manage User \n2. Exit"
		);

		switch (adminChoice) {
			case 1:
				manageUser();
				break;

			case 2:
				alert("Thank you!");
				return;
				break;

			default:
				alert("Please select appropriate choice. Thank You!");

				break;
		}
		adminOperation();
	}

	// ---------------------------------------Just for practice-------------------------
	function abc(pp, i, ap) {
		var ram = 0;
		if (i < pp.length - 1) {
			if (ap == pp[i].name) {
				ram = 1;
			}
			i++;
			ram = abc(pp, i, ap);
		}
		return ram;
	}
	var ss = abc(list, 0, ko);
	// -------------------------------------Just for practice----------------------------

	function login(list) {
		var loginFlag = 0;
		var loginName = checklen("Enter your Name: ", 3);
		// ----------------yaha per for loop ko recursion meh kese convert kere...?--------------
		for (var l of list) {
			if (loginName == l.name) {
				loginFlag = 1;
				var loginPassword = checklen("Enter your Password: ", 6);
				if (loginPassword == l.password) {
					if (l.status == 1) {
						loginFlag = l;
						alert("Login Successfull, Welcome :)");
					} else {
						alert("You're not been approved yet!!");
					}
				}
			}
		}
		return loginFlag;
	}

	function admin() {
		//---------------------------Admin---------------------------------------

		var adminFlag = login(adminList);
		if (adminFlag == 0) {
			alert("Invalid Admin Name !!!");
		} else if (adminFlag == 1) {
			alert("Invalid Admin Password !!!");
		} else {
			adminOperation();
		}
	}

	function visitor() {
		//------------------------------Visitor--------------------------------------

		var name = checklen("Enter the username: \nEnter atleast 3 chars", 3);
		var password = checklen("Enter the password: \nEnter atleast 6 chars", 6);
		var fullName = checklen("Enter the full name: \nEnter atleast 5 chars", 5);
		var status = 0;
		var accountNumber = "0";
		var accountBalance = 0;
		var dummy = {
			id: id++,
			name,
			password,
			fullName,
			accountNumber,
			accountBalance,
			status,
		};
		userData.push(dummy);
		alert("User data added successfully !!!");
	}

	function main() {
		var choice = checkNum(
			"What's your user role ? \n1. Visitor \n2. Admin \n3. User \n4. Exit"
		);

		switch (choice) {
			case 1:
				visitor();
				break;

			case 2:
				admin();
				break;

			case 3:
				user();
				break;

			case 4:
				alert("Thank you! for visiting our system...");
				return;
				break;

			default:
				alert("Please select appropriate choice. Thank You!");

				break;
		}
		main();
	}

	main();
</script>