uldp-degree-mangement-system/controllers/aboutUsController.js

const { addBaseUrlToImages } = require("../utils/imageHelper");
const AboutUs = require("../models/aboutUs");
const Blog = require("../models/blog");
const jsonHelper = require("../utils/jsonHelper");

/**
 * GET /api/about
 * Lấy dữ liệu About Us (Public API cho website và CMS load dữ liệu)
 */
exports.getAbout = async (req, res) => {
    try {
        // Force no-cache headers
        res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
        res.setHeader("Pragma", "no-cache");
        res.setHeader("Expires", "0");

        const data = await AboutUs.getSingle();
        const rawData = data.toObject();

        // === Dynamic Blog News Section ===
        const news = rawData.news || {};
        let blogs = [];

        // Nếu có chọn blog cụ thể
        if (news.selectedBlogIds && news.selectedBlogIds.length > 0) {
            blogs = await Blog.find({
                _id: { $in: news.selectedBlogIds },
                status: "published",
            }).lean();

            // Sắp xếp theo thứ tự đã chọn trong selectedBlogIds
            blogs.sort((a, b) => {
                return news.selectedBlogIds.indexOf(a._id.toString()) - news.selectedBlogIds.indexOf(b._id.toString());
            });
        }

        // Nếu không chọn hoặc chọn nhưng không đủ, lấy thêm 3 bài mới nhất
        if (blogs.length === 0) {
            blogs = await Blog.find({ status: "published" }).sort({ createdAt: -1 }).limit(3).lean();
        }

        // Map dữ liệu blog sang format mà frontend mong đợi
        news.items = blogs.map((blog) => ({
            title: blog.title,
            category: blog.category && blog.category[0] ? blog.category[0] : "Visa",
            date:
                blog.publishedAt ||
                new Date(blog.createdAt).toLocaleDateString("en-GB", {
                    day: "numeric",
                    month: "long",
                    year: "numeric",
                }),
            comments: blog.commentsCount || 0,
            author: {
                name: blog.author || "Admin",
                avatar: "/assets/img/home-1/news/client.png", // Default avatar
            },
            link: `/blog/${blog.slug}`,
            thumbnail: blog.featuredImage,
        }));

        rawData.news = news;
        // ===============================

        const baseUrl = process.env.BACKEND_URL || `${req.protocol}://${req.get("host")}`;
        const processedData = addBaseUrlToImages(rawData, baseUrl);

        res.json(processedData);
    } catch (error) {
        console.error("Error getting about data:", error);
        res.status(500).json({
            success: false,
            error: "Failed to get about data",
        });
    }
};

/**
 * PUT /api/about
 * Cập nhật dữ liệu About Us (Dùng cho AJAX từ CMS)
 */
exports.updateAbout = async (req, res) => {
    try {
        let updateData = req.body;

        // Nếu dữ liệu gửi qua trường aboutJson (dạng string JSON)
        if (updateData.aboutJson && typeof updateData.aboutJson === "string") {
            try {
                updateData = JSON.parse(updateData.aboutJson);
            } catch (e) {
                return res.status(400).json({
                    success: false,
                    message: "Invalid JSON in aboutJson",
                });
            }
        }

        const doc = await AboutUs.getSingle();
        // Use .set() for better handling of nested objects/arrays in Mongoose
        doc.set(updateData);
        await doc.save();

        // Fetch fresh data for syncing and returning
        const finalData = await AboutUs.findOne().select("-_id -__v -createdAt -updatedAt").lean();

        // Update about.json file to keep it in sync
        jsonHelper.writeJsonFile("about", finalData);

        res.json({
            success: true,
            message: "About Us updated successfully",
            data: finalData,
        });
    } catch (error) {
        console.error("Error updating about data:", error);
        res.status(500).json({
            success: false,
            error: "Failed to update about data: " + error.message,
        });
    }
};

/**
 * Render admin page (Dùng cho Admin UI)
 */
exports.index = async (req, res) => {
    try {
        const data = await AboutUs.getSingle();
        const rawData = data.toObject();

        // Lấy tất cả blog để chọn trong CMS
        const allBlogs = await Blog.find({ status: "published" }).sort({ createdAt: -1 }).lean();

        const activeTab = req.query.activeTab || "hero";
        res.render("admin/aboutUs/index", {
            layout: "layouts/main",
            title: "About Us Management",
            data: rawData,
            allBlogs,
            activeTab,
            user: req.session.user,
            currentPath: req.path,
            frontendUrl: process.env.FRONTEND_URL || "http://localhost:3000",
            backendUrl: process.env.BACKEND_URL || "http://localhost:3001",
        });
    } catch (err) {
        console.error("Error in about index:", err);
        req.flash("error_msg", "Error loading About Us page");
        res.redirect("/admin/dashboard");
    }
};

/**
 * Update method cho form-based submission (Admin UI - Post fallback)
 */
exports.update = async (req, res) => {
    try {
        let updateData = req.body;
        if (updateData.aboutJson && typeof updateData.aboutJson === "string") {
            try {
                updateData = JSON.parse(updateData.aboutJson);
            } catch (e) {
                req.flash("error_msg", "Invalid JSON data");
                return res.redirect("/admin/about-us");
            }
        }

        const doc = await AboutUs.getSingle();
        doc.set(updateData);
        await doc.save();

        const finalData = await AboutUs.findOne().select("-_id -__v -createdAt -updatedAt").lean();
        jsonHelper.writeJsonFile("about", finalData);

        req.flash("success_msg", "About Us updated successfully");
        const activeTab = req.query.activeTab || "hero";
        res.redirect(`/admin/about-us?activeTab=${activeTab}`);
    } catch (err) {
        console.error("Update error:", err);
        req.flash("error_msg", "Error updating About Us: " + err.message);
        res.redirect("/admin/about-us");
    }
};

// Aliases for compatibility
exports.api = exports.getAbout;
exports.page = exports.getAbout;
exports.updateAboutUs = exports.updateAbout;