feat: add user management functions and update dashboard for create, update, and delete actions

backend/database.js

@@ -18,7 +18,7 @@ export async function loginUser(username, password) {
   );
 
   if (result.length > 0) {
-    console.log("User found: ", result[0]);
+    console.log("User found: ", result[0].username, " ", result[0].id);
     return { success: true, user: result[0] };
   } else {
     console.error(`Invalid username or password!; ${result[0]}`);
@@ -34,7 +34,6 @@ export async function createUser(
   email
 ) {
   try {
-
     const [result] = await pool.query(
       "INSERT INTO users (username, first_name, last_name, password, email) VALUES (?, ?, ?, ?, ?)",
       [username, first_name, last_name, password, email]
@@ -42,9 +41,69 @@ export async function createUser(
 
     console.log("User created successfully!");
     return { success: true };
-
   } catch (error) {
     console.error("Error creating user: ", error);
     return { success: false, message: "Error creating user" };
   }
 }
+
+export async function updateUser(
+  username,
+  first_name,
+  last_name,
+  password,
+  email
+) {
+  try {
+    const [result] = await pool.query(
+      "UPDATE users SET first_name = ?, last_name = ?, password = ?, email = ? WHERE username = ?",
+      [first_name, last_name, password, email, username]
+    );
+    return {
+      success: true,
+      message: "User updated successfully",
+      resultOfquery: result,
+    };
+  } catch (error) {
+    console.error("Error updating user: ", error);
+    return {
+      success: false,
+      message: "Error updating user",
+      resultOfquery: result,
+    };
+  }
+}
+
+export async function deleteUser(
+  username,
+  first_name,
+  last_name,
+  password,
+  email
+) {
+  try {
+    const [result] = await pool.query(
+      "DELETE FROM users WHERE username = ?  AND password = ?",
+      [username, password]
+    );
+    const resultOfquery = result.affectedRows;
+
+    if (resultOfquery > 0) {
+      console.log("User deleted successfully!");
+      return {
+        success: true,
+        message: "User deleted successfully",
+        resultOfquery: result,
+      };
+    }
+
+    if (resultOfquery === 0) {
+      console.log("Error deleting user.");
+      return {
+        success: false,
+        message: "Error deleting user",
+        resultOfquery: null,
+      };
+    }
+  } catch (err) {}
+}