Create models.py

models.py

@@ -0,0 +1,114 @@
+# models.py
+from sqlalchemy import create_engine, Column, Integer, String, DateTime, Boolean, ForeignKey, JSON, Float
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship, sessionmaker
+from datetime import datetime
+import uuid
+
+Base = declarative_base()
+
+class User(Base):
+    __tablename__ = 'users'
+    
+    id = Column(Integer, primary_key=True)
+    username = Column(String, unique=True, nullable=False)
+    email = Column(String, unique=True, nullable=False)
+    password_hash = Column(String, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    last_login = Column(DateTime)
+    is_active = Column(Boolean, default=True)
+    preferences = Column(JSON)
+    
+    # Relationships
+    courses = relationship("UserCourse", back_populates="user")
+    progress = relationship("CourseProgress", back_populates="user")
+    interactions = relationship("UserInteraction", back_populates="user")
+
+class Course(Base):
+    __tablename__ = 'courses'
+    
+    id = Column(Integer, primary_key=True)
+    uuid = Column(String, unique=True, default=lambda: str(uuid.uuid4()))
+    title = Column(String, nullable=False)
+    description = Column(String)
+    difficulty_level = Column(String)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, onupdate=datetime.utcnow)
+    content = Column(JSON)  # Stores complete course structure
+    metadata = Column(JSON)  # Stores additional course metadata
+    
+    # Relationships
+    modules = relationship("CourseModule", back_populates="course")
+    user_courses = relationship("UserCourse", back_populates="course")
+
+class CourseModule(Base):
+    __tablename__ = 'course_modules'
+    
+    id = Column(Integer, primary_key=True)
+    course_id = Column(Integer, ForeignKey('courses.id'))
+    title = Column(String, nullable=False)
+    description = Column(String)
+    order_index = Column(Integer)
+    content = Column(JSON)
+    prerequisites = Column(JSON)
+    
+    # Relationships
+    course = relationship("Course", back_populates="modules")
+    sections = relationship("ModuleSection", back_populates="module")
+
+class ModuleSection(Base):
+    __tablename__ = 'module_sections'
+    
+    id = Column(Integer, primary_key=True)
+    module_id = Column(Integer, ForeignKey('course_modules.id'))
+    title = Column(String, nullable=False)
+    content = Column(String)
+    order_index = Column(Integer)
+    metadata = Column(JSON)
+    
+    # Relationships
+    module = relationship("CourseModule", back_populates="sections")
+    quizzes = relationship("SectionQuiz", back_populates="section")
+
+class UserCourse(Base):
+    __tablename__ = 'user_courses'
+    
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey('users.id'))
+    course_id = Column(Integer, ForeignKey('courses.id'))
+    enrollment_date = Column(DateTime, default=datetime.utcnow)
+    completion_date = Column(DateTime)
+    status = Column(String)  # 'enrolled', 'in_progress', 'completed', 'archived'
+    
+    # Relationships
+    user = relationship("User", back_populates="courses")
+    course = relationship("Course", back_populates="user_courses")
+    progress = relationship("CourseProgress", back_populates="user_course")
+
+class CourseProgress(Base):
+    __tablename__ = 'course_progress'
+    
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey('users.id'))
+    user_course_id = Column(Integer, ForeignKey('user_courses.id'))
+    module_id = Column(Integer, ForeignKey('course_modules.id'))
+    last_accessed = Column(DateTime)
+    completion_percentage = Column(Float)
+    status = Column(String)  # 'not_started', 'in_progress', 'completed'
+    
+    # Relationships
+    user = relationship("User", back_populates="progress")
+    user_course = relationship("UserCourse", back_populates="progress")
+
+class UserInteraction(Base):
+    __tablename__ = 'user_interactions'
+    
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey('users.id'))
+    interaction_type = Column(String)  # 'quiz_attempt', 'question_asked', 'content_viewed'
+    content_reference = Column(String)
+    timestamp = Column(DateTime, default=datetime.utcnow)
+    metadata = Column(JSON)
+    
+    # Relationships
+    user = relationship("User", back_populates="interactions")