KavyapriyaJG · KavyapriyaJG · Mar 4, 2023
diff --git a/1.SitBack_Furniture-HTML/assets/images/chairs.png b/1.SitBack_Furniture-HTML/assets/images/chairs.png
diff --git a/1.SitBack_Furniture-HTML/assets/images/couches.png b/1.SitBack_Furniture-HTML/assets/images/couches.png
diff --git a/1.SitBack_Furniture-HTML/assets/images/css/style.css b/1.SitBack_Furniture-HTML/assets/images/css/style.css
diff --git a/1.SitBack_Furniture-HTML/assets/images/dining.png b/1.SitBack_Furniture-HTML/assets/images/dining.png
diff --git a/1.SitBack_Furniture-HTML/assets/images/test.jpg b/1.SitBack_Furniture-HTML/assets/images/test.jpg
diff --git a/1.SitBack_Furniture-HTML/index.html b/1.SitBack_Furniture-HTML/index.html
diff --git a/16.Closures/index.html b/16.Closures/index.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Closures</title>
+
+    <style>
+        button{
+            position: absolute;
+            top: 50%;
+            left: 50%;
+            transform : translateX(-50%);
+        }
+    </style>
+</head>
+<body>
+
+    <!-- FOR RETRYING INCASE OF ANY ERRORS IN INPUT -->
+    <button onclick="location.reload()"> ENTER INTO BANK </button>
+
+    <script src="scripts/index.js"></script>
+</body>
+</html>
diff --git a/16.Closures/scripts/index.js b/16.Closures/scripts/index.js
@@ -0,0 +1,128 @@
+/**
+ * HAS FUNCTIONS OF BANK LIKE 1.VALIDATING ENTRY ---On passing the entry---> 2.ATM 3.CDM
+ * @param {string} username 
+ * @param {string} userpin 
+ * @returns {object, function refernce} validAccountNumber, optionsInBank
+ */
+function validateEntry(username, userpin) {
+    //Record of Banks Accounts
+    let bankAccounts = [
+        {
+            accountNumber: "1234567890",
+            cardNumber: "4111111111111110",
+            PIN: "1234",
+            accountBalance: 100.00,
+            accountHolderName: "Account_Holder1"
+        },
+        {
+            accountNumber: "1234567891",
+            cardNumber: "4111111111111111",
+            PIN: "2345",
+            accountBalance: 100.00,
+            accountHolderName: "Account_Holder2"
+        },
+        {
+            accountNumber: "1234567892",
+            cardNumber: "4111111111111112",
+            PIN: "3456",
+            accountBalance: 100.00,
+            accountHolderName: "Account_Holder3"
+        },
+        {
+            accountNumber: "1234567893",
+            cardNumber: "4111111111111113",
+            PIN: "4567",
+            accountBalance: 100.00,
+            accountHolderName: "Account_Holder4"
+        },
+        {
+            accountNumber: "1234567894",
+            cardNumber: "4111111111111114",
+            PIN: "5678",
+            accountBalance: 100.00,
+            accountHolderName: "Account_Holder5"
+        },
+    ];
+
+    //Verifying Validity of the user
+    let validAccountNumber = findAccountNumber (username, userpin);
+    /**
+     * FETCHES THE INDEX (FOR VERIFYING IF THE USER BELONGS TO THE BANK), NAME OF ACCOUNT HOLDER 
+     * @param {string} username 
+     * @param {string} userpin 
+     * @returns {number, string} index, username
+     */
+    function findAccountNumber(username, userpin){
+        const index = bankAccounts.findIndex(account => (account.accountNumber==username && account.PIN==userpin));
+        var userName="";
+        if(index>-1) userName = bankAccounts[index].accountHolderName;
+        return {index,userName};
+    }
+
+    /**
+     * HAS OPERATIONS LIKE ATM, CDM
+     * @param {number} option 
+     * -Results are displayed with Alerts
+     */
+    function optionsInBank(option){
+        let userAccountBalance = bankAccounts[validAccountNumber.index].accountBalance;
+        //Withdraw money from ATM
+        if(option==1){
+            const amount = prompt("Enter the amount of money you want to withdraw");
+            if(userAccountBalance>=amount){
+                bankAccounts[validAccountNumber.index].accountBalance-=amount;
+                alert("Please recieve the cash amount of Rs."+amount);
+            }
+            else{
+                alert("Sorry! Your requested cash amount exceeded your account balance");
+            }
+        }
+        //Depositing cash into Cash Deposit Machine
+        else{
+            const amount = parseInt(prompt("Enter the amount of money you want to deposit"));
+            bankAccounts[validAccountNumber.index].accountBalance+=amount;
+        }
+        userAccountBalance = bankAccounts[validAccountNumber.index].accountBalance;
+        alert("Your current account balance is Rs."+userAccountBalance);
+    }
+
+    //Returning the inner functions, thereby taking advantage of its closure (function with parent's lexical scope) to access the secret details 
+    return {validAccountNumber, optionsInBank};
+}
+
+
+//STEP BY STEP PROCEDURE OF GETTING ACCESS TO BANK OPERATIONS
+let username = prompt("Enter Your Account Number");
+if(username) {
+    let userpin = prompt("Enter Your User PIN");
+    if(userpin) {
+        let accountNumber = validateEntry(username, userpin);
+
+        //VALID ACCOUNT HOLDER
+        if(accountNumber.validAccountNumber.index >-1){
+            alert("Welcome Mr/Ms/Mrs "+ accountNumber.validAccountNumber.userName);
+
+            let option = prompt("Enter option 1 for ATM"+"\n"+"Enter option 2 for Cash Deposit Machine");
+
+            //1 FOR ATM , 2 FOR CDM
+            if(option==1 || option==2){
+                accountNumber.optionsInBank(option);
+            }
+
+            //INVALID OPTION CHOSEN
+            else{
+                alert("Please enter a valid choice !");
+            }
+        }
+        //INVALID USER
+        else{
+            alert("Sorry you got your credentials wrong !");
+        }
+    }
+    else{
+        alert("Please Enter your user PIN !");
+    }
+}
+else{
+    alert("Please Enter your account number !");
+}