Interface CourseProgress

interface CourseProgress {
    assignmentsCompleted?: number;
    assignmentsTotal?: number;
    averageSessionTime: number;
    certificateEarned: boolean;
    certificateUrl?: string;
    completedAt?: Date;
    completedLessons: number;
    completedUnits: number;
    courseId: string;
    courseTitle: string;
    currentGrade?: number;
    enrolledAt: Date;
    enrollmentId: string;
    estimatedTimeToComplete?: number;
    expiresAt?: Date;
    lastAccessedAt?: Date;
    progressPercentage: number;
    quizScoreAverage?: number;
    status: "completed" | "expired" | "not_started" | "in_progress";
    totalLessons: number;
    totalTimeSpent: number;
    totalUnits: number;
    unitProgress?: UnitProgress[];
}