Resolve "Rethink permission handling for subject/courses"

Closes #18 (closed)

aleksis/apps/cursus/rules.py

@@ -15,9 +15,7 @@ view_subjects_predicate = has_person & (
 )
 add_perm("cursus.view_subjects_rule", view_subjects_predicate)
 
-view_subject_predicate = has_person & (
-    has_global_perm("cursus.view_subject") | has_object_perm("cursus.view_subject")
-)
+view_subject_predicate = has_person
 add_perm("cursus.view_subject_rule", view_subject_predicate)
 
 create_subject_predicate = has_person & has_global_perm("cursus.add_subject")
@@ -38,12 +36,15 @@ view_courses_predicate = has_person & (
 )
 add_perm("cursus.view_courses_rule", view_courses_predicate)
 
-view_course_predicate = has_person & (
+view_course_predicate = has_person
+add_perm("cursus.view_course_rule", view_course_predicate)
+
+view_course_details_predicate = has_person & (
     is_course_teacher
     | has_global_perm("cursus.view_course")
     | has_object_perm("cursus.view_course")
 )
-add_perm("cursus.view_course_rule", view_course_predicate)
+add_perm("cursus.view_course_details_rule", view_course_details_predicate)
 
 create_course_predicate = has_person & has_global_perm("cursus.add_course")
 add_perm("cursus.create_course_rule", create_course_predicate)