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This commit is contained in:
AD2025
481
backend/controllers/category.controller.js
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481
backend/controllers/category.controller.js
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@@ -0,0 +1,481 @@
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const { Category, Question } = require('../models');
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/**
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* @desc Get all active categories
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* @route GET /api/categories
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* @access Public
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*/
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exports.getAllCategories = async (req, res) => {
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try {
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// Check if request is from guest or authenticated user
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const isGuest = !req.user; // If no user attached, it's a guest/public request
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// Build query conditions
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const whereConditions = {
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isActive: true
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};
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// If guest, only show guest-accessible categories
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if (isGuest) {
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whereConditions.guestAccessible = true;
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}
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// Fetch categories
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const categories = await Category.findAll({
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where: whereConditions,
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attributes: [
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'id',
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'name',
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'slug',
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'description',
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'icon',
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'color',
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'questionCount',
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'displayOrder',
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'guestAccessible'
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],
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order: [
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['displayOrder', 'ASC'],
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['name', 'ASC']
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]
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});
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res.status(200).json({
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success: true,
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count: categories.length,
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data: categories,
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message: isGuest
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? `${categories.length} guest-accessible categories available`
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: `${categories.length} categories available`
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});
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} catch (error) {
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console.error('Error fetching categories:', error);
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res.status(500).json({
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success: false,
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message: 'Error fetching categories',
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error: error.message
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});
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}
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};
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/**
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* @desc Get category details by ID
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* @route GET /api/categories/:id
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* @access Public (with optional auth for access control)
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*/
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exports.getCategoryById = async (req, res) => {
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try {
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const { id } = req.params;
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const isGuest = !req.user;
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// Validate ID (accepts UUID or numeric)
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if (!id) {
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return res.status(400).json({
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success: false,
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message: 'Invalid category ID'
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});
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}
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// UUID format validation (basic check)
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const isUUID = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(id);
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const isNumeric = !isNaN(id) && Number.isInteger(Number(id));
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if (!isUUID && !isNumeric) {
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return res.status(400).json({
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success: false,
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message: 'Invalid category ID format'
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});
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}
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// Find category
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const category = await Category.findByPk(id, {
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attributes: [
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'id',
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'name',
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'slug',
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'description',
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'icon',
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'color',
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'questionCount',
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'displayOrder',
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'guestAccessible',
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'isActive'
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]
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});
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// Check if category exists
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if (!category) {
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return res.status(404).json({
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success: false,
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message: 'Category not found'
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});
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}
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// Check if category is active
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if (!category.isActive) {
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return res.status(404).json({
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success: false,
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message: 'Category not found'
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});
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}
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// Check guest access
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if (isGuest && !category.guestAccessible) {
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return res.status(403).json({
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success: false,
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message: 'This category requires authentication. Please register or login to access.',
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requiresAuth: true
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});
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}
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// Get question preview (first 5 questions)
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const questionPreview = await Question.findAll({
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where: {
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categoryId: id,
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isActive: true
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},
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attributes: [
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'id',
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'questionText',
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'questionType',
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'difficulty',
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'points',
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'timesAttempted',
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'timesCorrect'
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],
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order: [['createdAt', 'ASC']],
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limit: 5
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});
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// Calculate category stats
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const allQuestions = await Question.findAll({
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where: {
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categoryId: id,
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isActive: true
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},
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attributes: ['difficulty', 'timesAttempted', 'timesCorrect']
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});
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const stats = {
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totalQuestions: allQuestions.length,
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questionsByDifficulty: {
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easy: allQuestions.filter(q => q.difficulty === 'easy').length,
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medium: allQuestions.filter(q => q.difficulty === 'medium').length,
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hard: allQuestions.filter(q => q.difficulty === 'hard').length
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},
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totalAttempts: allQuestions.reduce((sum, q) => sum + (q.timesAttempted || 0), 0),
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totalCorrect: allQuestions.reduce((sum, q) => sum + (q.timesCorrect || 0), 0)
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};
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// Calculate average accuracy
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stats.averageAccuracy = stats.totalAttempts > 0
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? Math.round((stats.totalCorrect / stats.totalAttempts) * 100)
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: 0;
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// Prepare response
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const categoryData = {
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id: category.id,
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name: category.name,
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slug: category.slug,
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description: category.description,
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icon: category.icon,
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color: category.color,
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questionCount: category.questionCount,
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displayOrder: category.displayOrder,
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guestAccessible: category.guestAccessible
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};
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res.status(200).json({
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success: true,
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data: {
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category: categoryData,
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questionPreview: questionPreview.map(q => ({
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id: q.id,
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questionText: q.questionText,
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questionType: q.questionType,
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difficulty: q.difficulty,
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points: q.points,
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accuracy: q.timesAttempted > 0
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? Math.round((q.timesCorrect / q.timesAttempted) * 100)
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: 0
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})),
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stats
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},
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message: `Category details retrieved successfully`
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});
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} catch (error) {
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console.error('Error fetching category details:', error);
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res.status(500).json({
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success: false,
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message: 'Error fetching category details',
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error: error.message
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});
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}
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};
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/**
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* @desc Create new category (Admin only)
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* @route POST /api/categories
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* @access Private/Admin
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*/
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exports.createCategory = async (req, res) => {
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try {
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const {
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name,
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slug,
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description,
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icon,
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color,
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guestAccessible,
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displayOrder
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} = req.body;
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// Validate required fields
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if (!name) {
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return res.status(400).json({
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success: false,
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message: 'Category name is required'
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});
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}
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// Check if category with same name exists
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const existingByName = await Category.findOne({
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where: { name }
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});
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if (existingByName) {
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return res.status(400).json({
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success: false,
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message: 'A category with this name already exists'
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});
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}
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// Check if custom slug provided and if it exists
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if (slug) {
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const existingBySlug = await Category.findOne({
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where: { slug }
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});
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if (existingBySlug) {
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return res.status(400).json({
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success: false,
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message: 'A category with this slug already exists'
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});
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}
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}
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// Create category (slug will be auto-generated by model hook if not provided)
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const category = await Category.create({
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name,
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slug,
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description: description || null,
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icon: icon || null,
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color: color || '#3B82F6',
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guestAccessible: guestAccessible !== undefined ? guestAccessible : false,
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displayOrder: displayOrder || 0,
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isActive: true,
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questionCount: 0,
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quizCount: 0
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});
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res.status(201).json({
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success: true,
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data: {
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id: category.id,
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name: category.name,
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slug: category.slug,
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description: category.description,
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icon: category.icon,
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color: category.color,
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guestAccessible: category.guestAccessible,
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displayOrder: category.displayOrder,
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questionCount: category.questionCount,
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isActive: category.isActive
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},
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message: 'Category created successfully'
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});
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} catch (error) {
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console.error('Error creating category:', error);
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res.status(500).json({
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success: false,
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message: 'Error creating category',
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error: error.message
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});
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}
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};
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/**
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* @desc Update category (Admin only)
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* @route PUT /api/categories/:id
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* @access Private/Admin
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*/
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exports.updateCategory = async (req, res) => {
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try {
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const { id } = req.params;
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const {
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name,
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slug,
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description,
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icon,
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color,
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guestAccessible,
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displayOrder,
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isActive
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} = req.body;
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// Validate ID
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if (!id) {
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return res.status(400).json({
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success: false,
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message: 'Category ID is required'
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});
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}
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// Find category
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const category = await Category.findByPk(id);
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if (!category) {
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return res.status(404).json({
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success: false,
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message: 'Category not found'
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});
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}
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// Check if new name conflicts with existing category
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if (name && name !== category.name) {
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const existingByName = await Category.findOne({
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where: { name }
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});
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if (existingByName) {
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return res.status(400).json({
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success: false,
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message: 'A category with this name already exists'
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});
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}
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}
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// Check if new slug conflicts with existing category
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if (slug && slug !== category.slug) {
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const existingBySlug = await Category.findOne({
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where: { slug }
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});
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if (existingBySlug) {
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return res.status(400).json({
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success: false,
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message: 'A category with this slug already exists'
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});
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}
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}
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// Update category
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const updateData = {};
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if (name !== undefined) updateData.name = name;
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if (slug !== undefined) updateData.slug = slug;
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if (description !== undefined) updateData.description = description;
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if (icon !== undefined) updateData.icon = icon;
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if (color !== undefined) updateData.color = color;
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if (guestAccessible !== undefined) updateData.guestAccessible = guestAccessible;
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if (displayOrder !== undefined) updateData.displayOrder = displayOrder;
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if (isActive !== undefined) updateData.isActive = isActive;
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await category.update(updateData);
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res.status(200).json({
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success: true,
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data: {
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id: category.id,
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name: category.name,
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slug: category.slug,
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description: category.description,
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icon: category.icon,
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color: category.color,
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guestAccessible: category.guestAccessible,
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displayOrder: category.displayOrder,
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questionCount: category.questionCount,
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isActive: category.isActive
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},
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message: 'Category updated successfully'
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});
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} catch (error) {
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console.error('Error updating category:', error);
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res.status(500).json({
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success: false,
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message: 'Error updating category',
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error: error.message
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});
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}
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};
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/**
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* @desc Delete category (soft delete - Admin only)
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* @route DELETE /api/categories/:id
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* @access Private/Admin
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*/
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exports.deleteCategory = async (req, res) => {
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try {
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const { id } = req.params;
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// Validate ID
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if (!id) {
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return res.status(400).json({
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success: false,
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message: 'Category ID is required'
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});
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}
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// Find category
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const category = await Category.findByPk(id);
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if (!category) {
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return res.status(404).json({
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success: false,
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message: 'Category not found'
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});
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}
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// Check if already deleted
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if (!category.isActive) {
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return res.status(400).json({
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success: false,
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message: 'Category is already deleted'
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});
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}
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// Check if category has questions
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const questionCount = await Question.count({
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where: {
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categoryId: id,
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isActive: true
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}
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});
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// Soft delete - set isActive to false
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await category.update({ isActive: false });
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res.status(200).json({
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success: true,
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data: {
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id: category.id,
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name: category.name,
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questionCount: questionCount
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},
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message: questionCount > 0
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? `Category deleted successfully. ${questionCount} questions are still associated with this category.`
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: 'Category deleted successfully'
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});
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} catch (error) {
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console.error('Error deleting category:', error);
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res.status(500).json({
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success: false,
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message: 'Error deleting category',
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error: error.message
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});
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}
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};
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Block a user