feat: course analytics (#574)

* feat: added anaytics for the course page

* feat: Added pagination

* feat: cleanup

* feat: added translations

* feat: added fixes

* my improvements

---------

Co-authored-by: Rotimi Best <[email protected]>

supabase/migrations/20250917235052_course_analytics.sql

@@ -0,0 +1,31 @@
+set check_function_bodies = off;
+
+CREATE OR REPLACE FUNCTION public.get_course_progress(course_id_arg uuid, profile_id_arg uuid)
+ RETURNS TABLE(lessons_count bigint, lessons_completed bigint, exercises_count bigint, exercises_completed bigint)
+ LANGUAGE plpgsql
+AS $function$
+BEGIN
+RETURN QUERY
+select
+  count(distinct lesson.id) as lessons_count,
+  count(distinct lesson_completion.id) as lessons_completed,
+  count(distinct exercise.id) as exercises_count,
+  count(distinct submission.id) as exercises_completed
+from
+  course
+  join "group" on "group".id = course.group_id
+  join groupmember on groupmember.group_id = course.group_id
+  join profile on profile.id = groupmember.profile_id
+  left join lesson on lesson.course_id = course.id
+  left join lesson_completion on lesson_completion.lesson_id = lesson.id
+  and lesson_completion.is_complete = true
+  and lesson_completion.profile_id = profile.id
+  left join exercise on exercise.lesson_id = lesson.id
+  left join submission on submission.exercise_id = exercise.id
+  and submission.submitted_by = groupmember.id
+where
+  course.id = course_id_arg
+  and profile.id = profile_id_arg;
+END;
+$function$
+;