final changes

backend/controllers/departmentController.js

@@ -0,0 +1,78 @@
+const DepartmentEmail = require("../models/DepartmentEmail");
+const Program = require("../models/Program");
+
+exports.getAllDepartmentEmails = async (req, res) => {
+  try {
+    const departmentEmails = await DepartmentEmail.find();
+    res.json(departmentEmails);
+  } catch (error) {
+    console.error("Error fetching department emails:", error);
+    res.status(500).json({ error: "Error fetching department emails" });
+  }
+};
+
+exports.getDepartmentsByProgram = async (req, res) => {
+  const program = await Program.findOne({ name: req.params.program });
+  res.json(program ? program.departments : []);
+};
+
+exports.getEmailsByDepartment = async (req, res) => {
+  const departmentEmails = await DepartmentEmail.findOne({ department: req.params.department });
+  res.json(departmentEmails ? { emails: departmentEmails.emails } : { emails: [] });
+};
+
+exports.updateDepartmentEmails = async (req, res) => {
+  const { department } = req.params;
+  const { emails } = req.body;
+
+  if (!emails || !Array.isArray(emails)) {
+    return res.status(400).json({ error: "Emails array is required" });
+  }
+
+  try {
+    const updatedDepartment = await DepartmentEmail.findOneAndUpdate(
+      { department },
+      { emails },
+      { new: true, upsert: true }
+    );
+    res.json(updatedDepartment);
+  } catch (error) {
+    console.error("Error updating department emails:", error);
+    res.status(500).json({ error: "Error updating department emails" });
+  }
+};
+
+exports.createDepartment = async (req, res) => {
+  const { department, emails, program } = req.body;
+
+  if (!department || !emails || !Array.isArray(emails) || !program) {
+    return res.status(400).json({ error: "Department, program, and emails array are required" });
+  }
+
+  try {
+    const newDepartment = new DepartmentEmail({ department, emails });
+    await newDepartment.save();
+
+    await Program.findOneAndUpdate(
+      { name: program },
+      { $addToSet: { departments: department } },
+      { upsert: true }
+    );
+
+    res.status(201).json(newDepartment);
+  } catch (error) {
+    console.error("Error creating department:", error);
+    res.status(500).json({ error: "Error creating department" });
+  }
+};
+
+exports.deleteDepartment = async (req, res) => {
+  try {
+    const { department } = req.params;
+    await DepartmentEmail.findOneAndDelete({ department });
+    res.json({ message: "Department deleted successfully" });
+  } catch (error) {
+    console.error("Error deleting department:", error);
+    res.status(500).json({ error: "Error deleting department" });
+  }
+};