From 3148aaf7c43866bd672d54ac54a0e70bc71f1020 Mon Sep 17 00:00:00 2001
From: Alban Gruin
Date: Sat, 18 Nov 2017 17:14:26 +0100
Subject: Mise en commun du traitement des données avant rendu de l’emploi du
 temps

---
 models.py | 13 +++++++++----
 views.py  | 43 ++++++++++++++++++++++++++++++-------------
 2 files changed, 39 insertions(+), 17 deletions(-)

diff --git a/models.py b/models.py
index 547c0e1..369a4a6 100644
--- a/models.py
+++ b/models.py
@@ -157,10 +157,15 @@ class Room(models.Model):
 
 
 class CourseManager(Manager):
-    def get_courses_for_group(self, group, **criteria):
-        return self.get_queryset() \
-                   .filter(groups__in=Group.objects.get_parents(group), **criteria) \
-                   .order_by("begin").prefetch_related("rooms")
+    def get_courses(self, obj, **criteria):
+        qs = self.get_queryset()
+        if isinstance(obj, Group):
+            qs = qs.filter(groups__in=Group.objects.get_parents(obj), **criteria) \
+                   .prefetch_related("rooms")
+        elif isinstance(obj, Room):
+            qs = qs.filter(rooms__in=(obj,), **criteria)
+
+        return qs.order_by("begin")
 
     def get_weeks(self, **criteria):
         return self.get_queryset() \
diff --git a/views.py b/views.py
index 3916fac..428711f 100644
--- a/views.py
+++ b/views.py
@@ -61,7 +61,7 @@ def group_list(request, year_slug, timetable_slug):
 
     return render(request, "group_list.html", {"timetable": timetable, "groups": groups})
 
-def timetable(request, year_slug, timetable_slug, group_slug, year=None, week=None):
+def timetable_common(request, obj, year=None, week=None):
     current_year, current_week = get_current_or_next_week()
     is_old_timetable, provided_week = False, True
 
@@ -73,21 +73,30 @@ def timetable(request, year_slug, timetable_slug, group_slug, year=None, week=No
 
     start, end = get_week(year, week)
 
-    timetable = get_object_or_404(Timetable, year__slug=year_slug, slug=timetable_slug)
-    group = get_object_or_404(Group, slug=group_slug, timetable=timetable)
-
-    courses = Course.objects.get_courses_for_group(group, begin__gte=start, begin__lt=end)
+    courses = Course.objects.get_courses(obj, begin__gte=start, begin__lt=end)
     if not courses.exists() and provided_week:
         raise Http404
 
     last_update = courses.aggregate(Max("last_update"))["last_update__max"]
     grouped_courses = group_courses(courses)
 
-    return render(request, "timetable.html", {"group": group, "courses": grouped_courses,
+    return render(request, "timetable.html", {"group": obj, "courses": grouped_courses,
                                               "last_update": last_update,
                                               "year": year, "week": int(week),
                                               "is_old_timetable": is_old_timetable})
 
+def timetable(request, year_slug, timetable_slug, group_slug, year=None, week=None):
+    timetable = get_object_or_404(Timetable, year__slug=year_slug, slug=timetable_slug)
+    group = get_object_or_404(Group, slug=group_slug, timetable=timetable)
+
+    if Group.objects.filter(timetable=timetable, mention=group.mention,
+                            subgroup__startswith=group.subgroup).count() > 1:
+        subgroups = Group.objects.get_relevant_groups(timetable, mention=group.mention,
+                                                      subgroup__startswith=group.subgroup)
+        return group_list_common(request, timetable, subgroups)
+
+    return timetable_common(request, group, year, week)
+
 def calendars(request, year_slug, timetable_slug, group_slug):
     group = get_object_or_404(Group, timetable__year__slug=year_slug,
                               timetable__slug=timetable_slug, slug=group_slug)
@@ -102,32 +111,40 @@ def rooms(request):
     end = start + datetime.timedelta(weeks=4)
 
     # Récupération des salles et de toutes les semaines où elles sont
-    # concernées
-    # Cette requête est un peu lente sur sqlite…
-    # Par contre c’est beaucoup plus rapide sur PostgreSQL
+    # concernées.
+    # Cette requête associe chaque salle à toutes les semaines où un
+    # cours s’y déroule. Le résultat est trié par le nom de la salle
+    # et par semaine.
+    # TODO optimiser cette requête, elle me semble un peu lente
     rooms = Room.objects.filter(course__begin__gte=start, course__begin__lt=end) \
                         .order_by("name") \
                         .annotate(year=ExtractYear("course__begin"),
                                   week=ExtractWeek("course__begin"),
                                   c=Count("*"))
 
+    # Regroupement des semaines dans une liste de chaque objet salle
     rooms_weeks = []
     for room in rooms:
+        # Si on a pas traité de salle ou que la salle courante
+        # dans le résultat de la requête est différente de la dernière
+        # dans la liste des salles traitées
         if len(rooms_weeks) == 0 or rooms_weeks[-1].id != room.id:
+            # On lui affecte un tableau et on l’ajoute dans
+            # la liste des salles à traiter
             room.weeks = []
             rooms_weeks.append(room)
 
+        # On récupère le premier jour de la semaine
         date, _ = get_week(room.year, room.week)
+        # Et on le rajoute dans la liste des semaines de la salle.
         rooms_weeks[-1].weeks.append(date)
 
+    # Rendu de la page.
     return render(request, "group_list.html", {"groups": rooms_weeks})
 
 def room_timetable(request, room_slug, year=None, week=None):
     room = get_object_or_404(Room, slug=room_slug)
-    courses = Course.objects.filter(rooms__in=(room,)).order_by("begin")
-
-    return render(request, "timetable.html", {"group": room, "courser": courses,
-                                              })
+    return timetable_common(request, room, year, week)
 
 def ctx_processor(request):
     return {"celcatsanitizer_version": edt.VERSION}
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