Alumni-Management-System/backend/models/Course.model.js at main · omkarhole/Alumni-Management-System · GitHub

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const mongoose = require('mongoose');

// Quiz schema for course assessments
const quizSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true
  },
  questions: [{
    _id: {
      type: mongoose.Schema.Types.ObjectId,
      auto: true
    },
    questionText: {
      type: String,
      required: true
    },
    questionType: {
      type: String,
      enum: ['multiple-choice', 'true-false', 'short-answer'],
      required: true
    },
    options: [String], // For multiple choice and true/false
    correctAnswer: {
      type: String,
      required: true
    },
    points: {
      type: Number,
      default: 1
    }
  }],
  passingScore: {
    type: Number,
    default: 70,
    min: 0,
    max: 100
  },
  timeLimit: {
    type: Number, // in minutes
    default: null
  }
}, { _id: false });

// Lesson schema
const lessonSchema = new mongoose.Schema({
  _id: {
    type: mongoose.Schema.Types.ObjectId,
    auto: true
  },
  title: {
    type: String,
    required: true
  },
  description: {
    type: String,
    default: ''
  },
  content: {
    type: String, // Markdown or HTML content
    default: ''
  },
  videoUrl: {
    type: String,
    default: ''
  },
  resources: [{
    name: String,
    url: String,
    type: {
      type: String,
      enum: ['pdf', 'link', 'document', 'other'],
      default: 'link'
    }
  }],
  quiz: quizSchema,
  duration: {
    type: Number, // in minutes
    default: 0
  },
  order: {
    type: Number,
    required: true
  }
}, { _id: false });

// Module schema
const moduleSchema = new mongoose.Schema({
  _id: {
    type: mongoose.Schema.Types.ObjectId,
    auto: true
  },
  title: {
    type: String,
    required: true
  },
  description: {
    type: String,
    default: ''
  },
  lessons: [lessonSchema],
  order: {
    type: Number,
    required: true
  }
}, { _id: false });

const courseSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true
  },
  description: {
    type: String,
    required: true
  },
  thumbnail: {
    type: String,
    default: ''
  },
  thumbnail_public_id: {
    type: String,
    default: ''
  },
  instructor: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true
  },
  category: {
    type: String,
    required: true
  },
  tags: [{
    type: String
  }],
  duration: {
    type: Number, // in minutes, calculated from lessons
    default: 0
  },
  level: {
    type: String,
    enum: ['beginner', 'intermediate', 'advanced'],
    default: 'beginner'
  },
  isFree: {
    type: Boolean,
    default: true
  },
  price: {
    type: Number,
    default: 0
  },
  modules: [moduleSchema],
  description_short: {
    type: String,
    default: ''
  },
  learningOutcomes: [{
    type: String
  }],
  requirements: [{
    type: String
  }],
  enrollmentCount: {
    type: Number,
    default: 0
  },
  averageRating: {
    type: Number,
    default: 0,
    min: 0,
    max: 5
  },
  ratingCount: {
    type: Number,
    default: 0
  },
  isPublished: {
    type: Boolean,
    default: false
  },
  status: {
    type: String,
    enum: ['draft', 'published', 'archived'],
    default: 'draft'
  },
  certificateTemplate: {
    type: String,
    default: '' // Can store certificate design or ID
  }
}, {
  timestamps: true
});

// Indexes
courseSchema.index({ instructor: 1 });
courseSchema.index({ category: 1 });
courseSchema.index({ tags: 1 });
courseSchema.index({ isPublished: 1 });
courseSchema.index({ createdAt: -1 });

module.exports = mongoose.model('Course', courseSchema);