added backend implementation

backend/models/issueVariantsModel.js

@@ -0,0 +1,114 @@
+import ownConn from "../dbConfig.js";
+
+//get all issue variants
+export const getAllIssueVariants = async (result) => {
+    try {
+        let sql = `SELECT * FROM issueVariants ORDER BY primaryID ASC`;
+        const results = await ownConn.execute(sql)
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get issue variant
+export const getIssueVariantById = async (id, result) => {
+    try {
+        let sql = `SELECT * FROM issueVariants WHERE primaryID = ? ORDER BY primaryID ASC`;
+        const results = await ownConn.execute(sql, [id])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get all selected issue variants by issueID
+export const getSelectedIssueVariantsByIssueId = async (selected, result) => {
+    try {
+        let sql = `SELECT * FROM issueVariants WHERE issueID LIKE '%${selected}%' ORDER BY issueID ASC`;
+        const results = await ownConn.execute(sql)
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//get all selected issue variants by name
+export const getSelectedIssueVariantsByName = async (selected, result) => {
+    try {
+        let sql = `SELECT * FROM issueVariants WHERE name LIKE '%${selected}%' ORDER BY name ASC`;
+        const results = await ownConn.execute(sql)
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+// Update issue variant
+export const updateIssueVariantById = async (data, result) => {
+    try {
+        const id = data.primaryID;
+        let sql = `UPDATE issueVariants SET issueID = ?, name = ? , properties = ?, state = ?, amount = ?, price = ? WHERE primaryID = ?`;
+        const results = await ownConn.query(sql, [data.issueID, data.name, data.properties, data.state, data.amount, data.price, id])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+
+// Delete issue variant to Database
+export const deleteIssueVariantById = async (id, result) => {
+    try {
+        let sql = `DELETE FROM issueVariants WHERE primaryID = ?`;
+        const results = await ownConn.query(sql, [id])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+// Delete issue variants by issueID to Database
+export const deleteIssueVariantByIssueSlipId = async (id, result) => {
+    try {
+        let sql = `DELETE FROM issueVariants WHERE issueID = ?`;
+        const results = await ownConn.query(sql, [id])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};
+
+//insert issue to databased
+export const insertIssueVariant = async (data, result) => {
+    try {
+        const results = await ownConn.query(`INSERT INTO issueVariants(issueID, name, properties, state, amount, price) VALUES(?, ?, ?, ?, ?, ?)`, [data.issueID, data.name, data.properties, data.state, data.amount, data.price])
+        result(null, results);
+    }
+    catch (err) {
+        // Manage Errors
+        console.log("SQL error : ", err);
+        result(err, null);
+    }
+};