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AD2025
274
backend/models/Category.js
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274
backend/models/Category.js
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const { v4: uuidv4 } = require('uuid');
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module.exports = (sequelize, DataTypes) => {
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const Category = sequelize.define('Category', {
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id: {
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type: DataTypes.CHAR(36),
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primaryKey: true,
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defaultValue: () => uuidv4(),
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allowNull: false,
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comment: 'UUID primary key'
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},
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name: {
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type: DataTypes.STRING(100),
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allowNull: false,
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unique: {
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msg: 'Category name already exists'
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},
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validate: {
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notEmpty: {
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msg: 'Category name cannot be empty'
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},
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len: {
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args: [2, 100],
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msg: 'Category name must be between 2 and 100 characters'
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}
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},
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comment: 'Category name'
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},
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slug: {
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type: DataTypes.STRING(100),
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allowNull: false,
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unique: {
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msg: 'Category slug already exists'
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},
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validate: {
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notEmpty: {
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msg: 'Slug cannot be empty'
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},
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is: {
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args: /^[a-z0-9]+(?:-[a-z0-9]+)*$/,
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msg: 'Slug must be lowercase alphanumeric with hyphens only'
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}
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},
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comment: 'URL-friendly slug'
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},
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description: {
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type: DataTypes.TEXT,
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allowNull: true,
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comment: 'Category description'
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},
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icon: {
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type: DataTypes.STRING(255),
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allowNull: true,
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comment: 'Icon URL or class'
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},
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color: {
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type: DataTypes.STRING(20),
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allowNull: true,
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validate: {
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is: {
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args: /^#[0-9A-F]{6}$/i,
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msg: 'Color must be a valid hex color (e.g., #FF5733)'
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}
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},
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comment: 'Display color (hex format)'
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},
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isActive: {
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type: DataTypes.BOOLEAN,
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allowNull: false,
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defaultValue: true,
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field: 'is_active',
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comment: 'Category active status'
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},
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guestAccessible: {
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type: DataTypes.BOOLEAN,
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allowNull: false,
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defaultValue: false,
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field: 'guest_accessible',
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comment: 'Whether guests can access this category'
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},
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// Statistics
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questionCount: {
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type: DataTypes.INTEGER,
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allowNull: false,
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defaultValue: 0,
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field: 'question_count',
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validate: {
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min: 0
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},
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comment: 'Total number of questions in this category'
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},
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quizCount: {
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type: DataTypes.INTEGER,
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allowNull: false,
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defaultValue: 0,
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field: 'quiz_count',
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validate: {
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min: 0
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},
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comment: 'Total number of quizzes taken in this category'
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},
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// Display order
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displayOrder: {
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type: DataTypes.INTEGER,
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allowNull: false,
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defaultValue: 0,
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field: 'display_order',
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comment: 'Display order (lower numbers first)'
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}
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}, {
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sequelize,
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modelName: 'Category',
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tableName: 'categories',
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timestamps: true,
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underscored: true,
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indexes: [
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{
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unique: true,
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fields: ['name']
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},
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{
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unique: true,
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fields: ['slug']
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},
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{
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fields: ['is_active']
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},
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{
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fields: ['guest_accessible']
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},
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{
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fields: ['display_order']
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},
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{
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fields: ['is_active', 'guest_accessible']
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}
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]
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});
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// Helper function to generate slug from name
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Category.generateSlug = function(name) {
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return name
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.toLowerCase()
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.trim()
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.replace(/[^\w\s-]/g, '') // Remove special characters
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.replace(/[\s_-]+/g, '-') // Replace spaces and underscores with hyphens
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.replace(/^-+|-+$/g, ''); // Remove leading/trailing hyphens
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};
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// Instance methods
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Category.prototype.incrementQuestionCount = async function() {
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this.questionCount += 1;
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await this.save();
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};
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Category.prototype.decrementQuestionCount = async function() {
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if (this.questionCount > 0) {
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this.questionCount -= 1;
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await this.save();
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}
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};
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Category.prototype.incrementQuizCount = async function() {
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this.quizCount += 1;
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await this.save();
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};
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// Class methods
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Category.findActiveCategories = async function(includeGuestOnly = false) {
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const where = { isActive: true };
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if (includeGuestOnly) {
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where.guestAccessible = true;
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}
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return await this.findAll({
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where,
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order: [['displayOrder', 'ASC'], ['name', 'ASC']]
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});
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};
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Category.findBySlug = async function(slug) {
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return await this.findOne({
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where: { slug, isActive: true }
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});
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};
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Category.getGuestAccessibleCategories = async function() {
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return await this.findAll({
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where: {
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isActive: true,
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guestAccessible: true
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},
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order: [['displayOrder', 'ASC'], ['name', 'ASC']]
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});
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};
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Category.getCategoriesWithStats = async function() {
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return await this.findAll({
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where: { isActive: true },
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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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'quizCount',
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'guestAccessible',
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'displayOrder'
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],
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order: [['displayOrder', 'ASC'], ['name', 'ASC']]
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});
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};
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// Hooks
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Category.beforeValidate((category) => {
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// Auto-generate slug from name if not provided
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if (!category.slug && category.name) {
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category.slug = Category.generateSlug(category.name);
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}
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// Ensure UUID is set
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if (!category.id) {
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category.id = uuidv4();
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}
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});
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Category.beforeCreate((category) => {
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// Ensure slug is generated even if validation was skipped
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if (!category.slug && category.name) {
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category.slug = Category.generateSlug(category.name);
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}
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});
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Category.beforeUpdate((category) => {
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// Regenerate slug if name changed
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if (category.changed('name') && !category.changed('slug')) {
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category.slug = Category.generateSlug(category.name);
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}
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});
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// Define associations
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Category.associate = function(models) {
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// Category has many questions
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if (models.Question) {
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Category.hasMany(models.Question, {
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foreignKey: 'categoryId',
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as: 'questions'
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});
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}
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// Category has many quiz sessions
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if (models.QuizSession) {
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Category.hasMany(models.QuizSession, {
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foreignKey: 'categoryId',
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as: 'quizSessions'
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});
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}
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// Category belongs to many guest settings (for guest-accessible categories)
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if (models.GuestSettings) {
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Category.belongsToMany(models.GuestSettings, {
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through: 'guest_settings_categories',
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foreignKey: 'categoryId',
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otherKey: 'guestSettingsId',
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as: 'guestSettings'
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});
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}
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};
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return Category;
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};
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