Finish admin dashboard and update sql

controllers/category.js

@@ -0,0 +1,47 @@
+const db = require("../utils/database");
+
+exports.getAllCategoriesWithPagination = async (req, res) => {
+  const limit = +req.query?.limit;
+  const page = +req.query?.page;
+  const offset = (page - 1) * limit;
+  try {
+    const [data, _] = await db.execute(
+      "SELECT * FROM Category C ORDER BY C.CategoryID ASC LIMIT ? OFFSET ?",
+      [limit.toString(), offset.toString()]
+    );
+
+    const [result] = await db.execute("SELECT COUNT(*) AS count FROM Category");
+    const { count: total } = result[0];
+    return res.json({ data, total });
+  } catch (error) {
+    res.json({ error: "Cannot fetch categories from database!" });
+  }
+};
+
+exports.addCategory = async (req, res) => {
+  const { name } = req.body;
+
+  try {
+    const [result] = await db.execute(
+      "INSERT INTO Category (Name) VALUES (?)",
+      [name]
+    );
+    res.json({ message: "Adding new category successfully!" });
+  } catch (error) {
+    res.json({ error: "Cannot add new category!" });
+  }
+};
+
+exports.removeCategory = async (req, res) => {
+  const { id } = req.params;
+
+  try {
+    const [result] = await db.execute(
+      `DELETE FROM Category WHERE CategoryID = ?`,
+      [id]
+    );
+    res.json({ message: "Delete category successfully!" });
+  } catch (error) {
+    res.json({ error: "Cannot remove category from database!" });
+  }
+};