[Backend] added: function add dummy data

backend/functions/add-dummy-data/app.js

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+const dbConnection = require("dbConnection.js");
+var mysql = require("mysql");
+
+/**
+ * Sample Lambda function which mocks the operation of buying a random number of shares for a stock.
+ * For demonstration purposes, this Lambda function does not actually perform any  actual transactions. It simply returns a mocked result.
+ *
+ * @param {Object} event - Input event to the Lambda function
+ * @param {Object} context - Lambda Context runtime methods and attributes
+ *
+ * @returns {Object} object - Object containing details of the stock buying transaction
+ *
+ */
+exports.lambdaHandler = async (event, context) => {
+  const con = await dbConnection.connectDB(
+    process.env.DatabaseAddress,
+    "user",
+    "Password1234",
+    "databaseAmazonianPrime"
+  );
+
+  var addUserQueries = [`INSERT INTO Users (UserID, FirstName, LastName, Email, Department, IsAdmin) VALUES (1, "John", "Doe", "[email protected]", "Marketing", false)`,
+  `INSERT INTO Users (UserID, FirstName, LastName, Email, Department, IsAdmin) VALUES (2, "Alice", "Ather", "[email protected]", null, false)`, 
+  `INSERT INTO Users (UserID, FirstName, LastName, Email, Department, IsAdmin) VALUES (3, "Bob", "Carlson", "[email protected]", "Management", true)`];
+
+  addUserQueries.forEach(async (queryString) => {
+    let insertUsers = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into users");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+  var addListingsQueries = [`INSERT INTO Listing (ListingID, UserID, ListingName, Description, Cost, Quantity, Category, ItemCondition, PostedTimestamp, IsActiveListing) VALUES (1, 1, "listing1", "listing1 description", 10.50, 5, "category1", "used", "2023-03-01 12:00:00", true)`,
+  `INSERT INTO Listing (ListingID, UserID, ListingName, Description, Cost, Quantity, Category, ItemCondition, PostedTimestamp, IsActiveListing) VALUES (2, 2, "listing2", "listing2 description", 20.00, 1, "category2", "used - good", "2023-03-01 12:00:00", true)`,
+  `INSERT INTO Listing (ListingID, UserID, ListingName, Description, Cost, Quantity, Category, ItemCondition, PostedTimestamp, IsActiveListing) VALUES (3, 3, "listing3", "listing3 description", 5.00, 10, "category3", "used", "2023-03-10 12:00:00", false)`];
+
+  addListingsQueries.forEach(async (queryString) => {
+    let insertListing = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into listings");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+  var addCountryQueries = [`INSERT INTO Country (CityName, Province, StreetAddress, PostalCode, Country) VALUES ("Vanvouver", "BC", "100 St", "V0V 0V0", "Canada")`,
+  `INSERT INTO Country (CityName, Province, StreetAddress, PostalCode, Country) VALUES ("Richmond", "BC", "1000 St", "V1V 1V1", "Canada")`, 
+  `INSERT INTO Country (CityName, Province, StreetAddress, PostalCode, Country) VALUES ("Toronto", "ON", "2000 St", "V2V 2V2", "Canada")`];
+
+  addCountryQueries.forEach(async (queryString) => {
+    let insertCountry = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into country");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+  var addAddressQueries = [`INSERT INTO Address (AddressID, UserID, CityName, Province, StreetAddress, IsBillingAddress, IsShippingAddress) VALUES (1, 1, "Vanvouver", "BC", "100 St", true, true)`,
+  `INSERT INTO Address (AddressID, UserID, CityName, Province, StreetAddress, IsBillingAddress, IsShippingAddress) VALUES (2, 2, "Richmond", "BC", "1000 St", false, true)`,
+  `INSERT INTO Address (AddressID, UserID, CityName, Province, StreetAddress, IsBillingAddress, IsShippingAddress) VALUES (3, 3, "Toronto", "ON", "2000 St", true, false)`];
+
+  addAddressQueries.forEach(async (queryString) => {
+    let insertAddress = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into address");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+  var addPaymentDetailsQueries = [`INSERT INTO PaymentDetails (PaymentID, UserID, AddressID, CreditCardNum, ExpiryDate, CVV, CardHolderName) VALUES (1, 1, 1, 1234123412341234, "1025", 100, "John Doe")`,
+  `INSERT INTO PaymentDetails (PaymentID, UserID, AddressID, CreditCardNum, ExpiryDate, CVV, CardHolderName) VALUES (2, 2, 3, 4321432143214321, "0626", 200, "Alice Ather")`,  
+  `INSERT INTO PaymentDetails (PaymentID, UserID, AddressID, CreditCardNum, ExpiryDate, CVV, CardHolderName) VALUES (3, 3, 2, 1234567812345678, "0825", 300, "Bob Carlson")`];
+
+  addPaymentDetailsQueries.forEach(async (queryString) => {
+    let insertPaymentDetails = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into users");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+  var addPaymentMethodQueries = [`INSERT INTO PaymentMethod (PaymentID, UserID) VALUES (1, 1)`,
+  `INSERT INTO PaymentMethod (PaymentID, UserID) VALUES (2, 2)`,
+  `INSERT INTO PaymentMethod (PaymentID, UserID) VALUES (3, 3)`];
+
+  addPaymentMethodQueries.forEach(async (queryString) => {
+    let insertPaymentMethod = await new Promise((resolve, reject) => {
+      con.query(queryString, function (err, res) {
+        if (err) {
+          reject("Error insert into users");
+        }
+        resolve(res);
+      });
+    });
+  });
+
+
+  const getAllUsersQuery = `SELECT * FROM Users`;
+
+  const getAllUsers = await new Promise((resolve, reject) => {
+    con.query(getAllUsersQuery, function (err, res) {
+      if (err) {
+        reject("Couldn't get the address from database!");
+      }
+      resolve(res);
+    });
+  });
+
+  return {
+    statusCode: 200,
+    body: JSON.stringify(getAllUsers),
+  };
+};

backend/functions/add-dummy-data/package.json

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+{
+  "name": "hello_world",
+  "version": "1.0.0",
+  "description": "hello world sample for NodeJS",
+  "main": "app.js",
+  "repository": "https://github.com/awslabs/aws-sam-cli/tree/develop/samcli/local/init/templates/cookiecutter-aws-sam-hello-nodejs",
+  "author": "SAM CLI",
+  "license": "MIT",
+  "dependencies": {
+    "axios": "^0.21.1",
+    "mysql": "^2.18.1"
+  },
+  "scripts": {
+    "test": "mocha tests/unit/"
+  },
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "mocha": "^9.1.4"
+  }
+}