added backend implementation

backend/models/customerModel.js

@@ -0,0 +1,132 @@
+import ownConn from "../dbConfig.js";
+
+//get all customers
+export const getCustomers = async (result) => {
+    try {
+        let sql = `SELECT * FROM customers ORDER BY customername ASC`;
+        const results = await ownConn.execute(sql)
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get all selected customers
+export const getSelectedCustomers = async (selected, result) => {
+    try {
+        let sql = `SELECT * FROM customers WHERE customername LIKE '%${selected}%' ORDER BY customername ASC`;
+        const results = await ownConn.execute(sql)
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get single customer by production order id
+export const getCustomerByProductionOrderId = async (id, result) => {
+    try {
+        let sql = `SELECT * FROM productionOrders WHERE ticketNumber = ?`;
+        const results = await ownConn.execute(sql, [id])
+        let sql1 = `SELECT * FROM customers  WHERE customerID LIKE '%${results[0].customerID}%'`;
+        const results1 = await ownConn.execute(sql1)
+        result(null, results1[0]);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get single customer by maintenance visit id
+export const getCustomerByMaintenanceVisitId = async (id, result) => {
+    try {
+        let sql = `SELECT * FROM maintenanceVisits WHERE primaryID = ?`;
+        const results = await ownConn.execute(sql, [id])
+        let sql1 = `SELECT * FROM customers  WHERE customerID LIKE '%${results[0].customerID}%'`;
+        const results1 = await ownConn.execute(sql1)
+        result(null, results1[0]);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//insert customer to databased
+export const insertCustomer = async (data, result) => {
+    try {
+        const results = await ownConn.query(`INSERT INTO customers(customername, contactperson, EMail, phonenumber, address, postcode, city, notes) VALUES(?, ?, ?, ?, ?, ?, ?, ?)`, [data.customername, data.contactperson, data.EMail, data.phonenumber, data.address, data.postcode, data.city, data.notes])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get single customer by name
+export const getCustomerByCustomerId = async (id, result) => {
+    try {
+        let sql = `SELECT * FROM customers  WHERE customerID = ?`;
+        const results = await ownConn.execute(sql, [id])
+        result(null, results[0]);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get single customer by name
+export const getCustomerByName = async (id, result) => {
+    try {
+        let sql = `SELECT * FROM customers  WHERE customername = ?`;
+        const results = await ownConn.execute(sql, [id])
+        result(null, results[0]);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+// Update customer to Database
+export const updateCustomerById = async (data, result) => {
+    const id = data.customerID;
+    try {
+        let sql = `UPDATE customers SET customername = ?, contactperson = ?, EMail = ?, phonenumber = ?, address = ?,  postcode = ?, city = ?, notes = ? WHERE customerID = ?`;
+        const results = await ownConn.query(sql, [data.customername, data.contactperson, data.EMail, data.phonenumber, data.address, data.postcode, data.city, data.notes, id]);
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+
+// Delete customer to Database
+export const deleteCustomerById = async (id, result) => {
+    try {
+        let sql = `DELETE FROM customers WHERE customerID = ?`;
+        const results = await ownConn.query(sql, [id])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};