Implement statistics query types

Using count wrapper types to avoid duplicating the counted types.

aleksis/apps/alsijil/frontend/components/coursebook/statistics/statistics.graphql

@@ -2,23 +2,27 @@ fragment statistics on StatisticsByPersonType {
   participationCount
   absenceCount
   absenceReasons {
-    id
-    shortName
-    name
-    colour
-    countAsAbsent
     count
+    absenceReason {
+      id
+      shortName
+      name
+      colour
+      countAsAbsent
+    }
   }
   tardinessSum
   tardinessCount
   extraMarks {
-    id
-    shortName
-    name
-    colourFg
-    colourBg
-    showInCourseBook
     count
+    extraMark {
+      id
+      shortName
+      name
+      colourFg
+      colourBg
+      showInCourseBook
+    }
   }
 }
 

aleksis/apps/alsijil/schema/__init__.py

@@ -22,6 +22,7 @@ from .absences import (
     LessonsForPersonType,
     AbsencesBatchCreateMutation,
 )
+from .statistics import StatisticsByPersonType
 
 class Query(graphene.ObjectType):
     documentations = FilterOrderList(DocumentationType)
@@ -48,6 +49,9 @@ class Query(graphene.ObjectType):
         end=graphene.Date(required=True),
     )
 
+    statistics_by_person = graphene.Field(StatisticsByPersonType)
+    statistics_by_group = graphene.List(StatisticsByPersonType)
+
     def resolve_documentations_by_course_id(root, info, course_id, **kwargs):
         documentations = Documentation.objects.filter(
             Q(course__pk=course_id) | Q(amends__course__pk=course_id)

aleksis/apps/alsijil/schema/statistics.py

+import graphene
+from aleksis.apps.kolego.schema.absence import AbsenceReasonType
+from .personal_note import ExtraMarkType
+
+class AbsenceReasonWithCountType(graphene.ObjectType):
+    absence_reason = graphene.Field(AbsenceReasonType)
+    count = graphene.Int()
+
+class ExtraMarkWithCountType(graphene.ObjectType):
+    extra_mark = graphene.Field(ExtraMarkType)
+    count = graphene.Int()
+
+class StatisticsByPersonType(graphene.ObjectType):
+    participation_count = graphene.Int()
+    absence_count = graphene.Int()
+    absence_reasons = graphene.List(AbsenceReasonWithCountType)
+    tardiness_sum = graphene.Int()
+    tardiness_count = graphene.Int()
+    extra_marks = graphene.List(ExtraMarkWithCountType)