saurav_funcBankSystem.html

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

	var adminList = [
		{ id: 1, adminName: "saurav", adminPassword: 121 },
		{ id: 2, adminName: "keshav", adminPassword: 121 },
	];

	function checklen(inp, len) {
		//-------------------------------Check Length--------------------------------------
		do {
			var inputString = prompt(inp);
		} while (inputString.length < len);
		return inputString;
	}

	function checkNum(inp) {
		//-------------------------------Check Number--------------------------------------
		do {
			var num = prompt(inp);
		} while (!num.match(numReg));
		return parseInt(num);
	}

	function userOperation(userObject) {
		//-------------------------------User Operation--------------------------------------
		var userDoWhile = true;
		do {
			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!");
					userDoWhile = false;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
		} while (userDoWhile);
	}

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

		var flag = -1;
		var loginUsername = checklen("Enter your Username: ", 3);
		for (var l of userData) {
			if (loginUsername == l.userName) {
				var loginPassword = checklen("Enter your Password: ", 6);
				if (loginPassword == l.password) {
					if (l.status == 1) {
						alert("Login Successful, Welcome!!");
						flag = l;
					} else {
						alert("The user has not been approved yet!!");
					}
					break;
				} else {
					flag = -2;
					break;
				}
			}
		}
		if (flag == -1) {
			alert("Invalid Username!");
		} else if (flag == -2) {
			alert("Wrong Password!");
		} else {
			userOperation(flag);
		}
	}

	function viewData() {
		//-------------------------------View--------------------------------------
		var outputString = "";
		for (var v of userData) {
			outputString +=
				"User Id: " +
				v.id +
				" - " +
				"User Name: " +
				v.userName +
				" - " +
				"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 admin() {
		//---------------------------Admin---------------------------------------

		var adminFlag = 0;
		var adminUserName = checklen("Enter your Admin Username: ", 3);
		for (var a of adminList) {
			if (adminUserName == a.adminName) {
				adminFlag = 1;
				var adminUserPassword = checklen("Enter your Admin Password: ", 3);
				if (adminUserPassword == a.adminPassword) {
					adminFlag = 2;
					alert("Login Successfull, Welcome to Admin Side");
				}
			}
		}
		if (adminFlag == 0) {
			alert("Invalid Admin UserName !!!");
		} else if (adminFlag == 1) {
			alert("Invalid Admin Password !!!");
		} else {
			var adminDoWhile = true;
			do {
				var adminChoice = checkNum(
					"What's your user role ? \n1. Manage User \n2. Exit"
				);

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

					case 2:
						adminDoWhile = false;
						alert("Thank you!");
						break;

					default:
						alert("Please select appropriate choice. Thank You!");
						break;
				}
			} while (adminDoWhile);
		}
	}

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

		var userName = 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++,
			userName,
			password,
			fullName,
			accountNumber,
			accountBalance,
			status,
		};
		userData.push(dummy);
		alert("User data added successfully !!!");
	}

	var doWhile = true;
	do {
		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:
				doWhile = false;
				alert("Thank you! for visiting our system...");
				break;

			default:
				alert("Please select appropriate choice. Thank You!");
				break;
		}
	} while (doWhile);
</script>