import { Course } from '../store/useCourseStore';
export type CourseGroups = {
    isStudent: Course[];
    isStudentOld: Course[];
    isTeacher: Course[];
    isTeacherOld: Course[];
    available: Course[];
};
export declare const filterUniqueCourses: (courses: Course[]) => Course[];
export declare const isActiveCourse: (course: Course) => boolean;
export declare const isActivecode: (courses: Course[], code: string) => boolean;
/**
 * Group courses by activity status (active/inactive).
 * @param courses List of courses or instances
 * @param skipUnique If true, do not apply unique filtering/logic.
 */
export declare const groupCoursesByActivity: (courses: Course[], skipUnique?: boolean) => {
    active: Course[];
    inactive: Course[];
};
export declare const groupCoursesByEnrollment: (courses: Course[]) => CourseGroups;