first commit

controllers/departmentController.js

@@ -0,0 +1,79 @@
+const Department = require('../models/department');
+const Degree = require('../models/degree');
+
+// GET /admin/department
+exports.index = async (req, res) => {
+  try {
+    const departments = await Department.find();
+    res.render('admin/department/index', {
+      departments,
+      user: req.session.user,
+      layout: 'layouts/admin',
+      title: 'Quản lý Khoa/Bộ môn'
+    });
+  } catch (err) {
+    console.error('departmentController.index error:', err);
+    req.flash('error', 'Đã xảy ra lỗi khi tải danh sách khoa/bộ môn');
+    res.redirect('/admin/dashboard');
+  }
+};
+
+// POST /admin/department/create
+exports.create = async (req, res) => {
+  try {
+    const { name } = req.body;
+    const slug = name.toLowerCase().trim().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
+
+    const existing = await Department.findOne({ slug });
+    if (existing) {
+      req.flash('error', 'Department already exists');
+      return res.redirect('back');
+    }
+
+    await Department.create({ name, slug });
+    req.flash('success', 'Department created');
+    res.redirect('/admin/department');
+  } catch (err) {
+    console.error('departmentController.create error:', err);
+    req.flash('error', 'Đã xảy ra lỗi khi tạo khoa/bộ môn');
+    res.redirect('back');
+  }
+};
+
+// POST /admin/department/:id/edit
+exports.update = async (req, res) => {
+  try {
+    const { id } = req.params;
+    const { name } = req.body;
+    const slug = name.toLowerCase().trim().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
+
+    await Department.findByIdAndUpdate(id, { name, slug });
+    req.flash('success', 'Department updated');
+    res.redirect('/admin/department');
+  } catch (err) {
+    console.error('departmentController.update error:', err);
+    req.flash('error', 'Đã xảy ra lỗi khi cập nhật khoa/bộ môn');
+    res.redirect('back');
+  }
+};
+
+// POST /admin/department/:id/delete
+exports.destroy = async (req, res) => {
+  try {
+    const { id } = req.params;
+    const count = await Degree.countDocuments({ department: id });
+
+    if (count > 0) {
+      req.flash('error', 'Cannot delete: Department is referenced by existing degrees');
+      return res.redirect('back');
+    }
+
+    await Department.findByIdAndDelete(id);
+    req.flash('success', 'Department deleted');
+    res.redirect('/admin/department');
+  } catch (err) {
+    console.error('departmentController.destroy error:', err);
+    req.flash('error', 'Đã xảy ra lỗi khi xóa khoa/bộ môn');
+    res.redirect('back');
+  }
+};