From a057fa6774112373923c79f1a1815e34f171c19a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Valentin=20Mogu=C3=A9rou?= <valentin@mp2i-vms.fr>
Date: Sat, 20 Apr 2024 03:23:29 +0200
Subject: [PATCH] ics permalink

---
 colloscope/admin.py                           |  1 +
 ...profil_id_alter_profil_colleur_and_more.py | 47 ++++++++++++++++
 ...calendrier_id_alter_liencalendrier_code.py | 24 ++++++++
 .../0010_alter_liencalendrier_code.py         | 18 ++++++
 .../0011_alter_liencalendrier_code.py         | 18 ++++++
 colloscope/models.py                          | 13 +++++
 colloscope/templates/dashboard.html           |  2 +-
 colloscope/views.py                           | 55 ++++++++++++-------
 8 files changed, 156 insertions(+), 22 deletions(-)
 create mode 100644 colloscope/migrations/0008_remove_profil_id_alter_profil_colleur_and_more.py
 create mode 100644 colloscope/migrations/0009_liencalendrier_id_alter_liencalendrier_code.py
 create mode 100644 colloscope/migrations/0010_alter_liencalendrier_code.py
 create mode 100644 colloscope/migrations/0011_alter_liencalendrier_code.py

diff --git a/colloscope/admin.py b/colloscope/admin.py
index 7040222..2ee6296 100644
--- a/colloscope/admin.py
+++ b/colloscope/admin.py
@@ -14,3 +14,4 @@ admin.site.register(Creneau)
 admin.site.register(Rotation)
 admin.site.register(Amendement)
 admin.site.register(Profil)
+admin.site.register(LienCalendrier)
diff --git a/colloscope/migrations/0008_remove_profil_id_alter_profil_colleur_and_more.py b/colloscope/migrations/0008_remove_profil_id_alter_profil_colleur_and_more.py
new file mode 100644
index 0000000..700312b
--- /dev/null
+++ b/colloscope/migrations/0008_remove_profil_id_alter_profil_colleur_and_more.py
@@ -0,0 +1,47 @@
+# Generated by Django 5.0.4 on 2024-04-20 00:53
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('colloscope', '0007_profil_delete_utilisateur'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='profil',
+            name='id',
+        ),
+        migrations.AlterField(
+            model_name='profil',
+            name='colleur',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='colloscope.colleur'),
+        ),
+        migrations.AlterField(
+            model_name='profil',
+            name='etudiant',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='colloscope.etudiant'),
+        ),
+        migrations.AlterField(
+            model_name='profil',
+            name='utilisateur',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, serialize=False, to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.CreateModel(
+            name='LienCalendrier',
+            fields=[
+                ('code', models.CharField(max_length=50, primary_key=True, serialize=False)),
+                ('etudiant', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='colloscope.etudiant')),
+                ('periode', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='colloscope.periode')),
+            ],
+        ),
+        migrations.AddConstraint(
+            model_name='liencalendrier',
+            constraint=models.UniqueConstraint(fields=('etudiant', 'periode'), name='unique_etudiant_periode_combination'),
+        ),
+    ]
diff --git a/colloscope/migrations/0009_liencalendrier_id_alter_liencalendrier_code.py b/colloscope/migrations/0009_liencalendrier_id_alter_liencalendrier_code.py
new file mode 100644
index 0000000..0a2be7b
--- /dev/null
+++ b/colloscope/migrations/0009_liencalendrier_id_alter_liencalendrier_code.py
@@ -0,0 +1,24 @@
+# Generated by Django 5.0.4 on 2024-04-20 01:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('colloscope', '0008_remove_profil_id_alter_profil_colleur_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='liencalendrier',
+            name='id',
+            field=models.BigAutoField(auto_created=True, default=1, primary_key=True, serialize=False, verbose_name='ID'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='liencalendrier',
+            name='code',
+            field=models.CharField(max_length=50),
+        ),
+    ]
diff --git a/colloscope/migrations/0010_alter_liencalendrier_code.py b/colloscope/migrations/0010_alter_liencalendrier_code.py
new file mode 100644
index 0000000..eab10a3
--- /dev/null
+++ b/colloscope/migrations/0010_alter_liencalendrier_code.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.4 on 2024-04-20 01:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('colloscope', '0009_liencalendrier_id_alter_liencalendrier_code'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='liencalendrier',
+            name='code',
+            field=models.CharField(max_length=50, unique=True),
+        ),
+    ]
diff --git a/colloscope/migrations/0011_alter_liencalendrier_code.py b/colloscope/migrations/0011_alter_liencalendrier_code.py
new file mode 100644
index 0000000..21cd143
--- /dev/null
+++ b/colloscope/migrations/0011_alter_liencalendrier_code.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.4 on 2024-04-20 01:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('colloscope', '0010_alter_liencalendrier_code'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='liencalendrier',
+            name='code',
+            field=models.CharField(max_length=32, unique=True),
+        ),
+    ]
diff --git a/colloscope/models.py b/colloscope/models.py
index 38b7872..44c2230 100644
--- a/colloscope/models.py
+++ b/colloscope/models.py
@@ -362,3 +362,16 @@ class Profil(models.Model):
                 return profil.colleur
             case _:
                 raise ValueError("profil non choisi")
+
+
+class LienCalendrier(models.Model):
+    code = models.CharField(max_length=32, unique=True)
+    etudiant = models.ForeignKey(Etudiant, on_delete=models.CASCADE)
+    periode = models.ForeignKey(Periode, on_delete=models.CASCADE)
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=['etudiant', 'periode'], name='unique_etudiant_periode_combination'
+            )
+        ]
diff --git a/colloscope/templates/dashboard.html b/colloscope/templates/dashboard.html
index 0d489d5..fab18a7 100644
--- a/colloscope/templates/dashboard.html
+++ b/colloscope/templates/dashboard.html
@@ -13,7 +13,7 @@ Bienvenue {{ etudiant }}. Votre lycée est {{ periode.classe.lycee.libelle }}, e
 <p>Période actuelle : {{ periode }}. Votre groupe de colle est {{ groupe }}. <a href="table.html">Consulter le colloscope</a></p>
 
 <h2>Mes colles</h2>
-<a href="calendrier.ics">Exporter en .ics</a>
+<a href="{{ lien_calendrier }}">Exporter en .ics</a>
 
 <ul>
 {% for n, lundi, colles in rotations %}
diff --git a/colloscope/views.py b/colloscope/views.py
index 6e7b89f..aae0147 100644
--- a/colloscope/views.py
+++ b/colloscope/views.py
@@ -1,4 +1,5 @@
 from datetime import date, timedelta
+from uuid import uuid4
 
 from django.shortcuts import redirect
 from django.http import HttpResponse
@@ -51,6 +52,18 @@ def choix_profil(request):
         }
         return HttpResponse(template.render(context))
 
+
+def get_lien_calendrier(etudiant, periode):
+    try:
+        lien = LienCalendrier.objects.get(etudiant=etudiant, periode=periode)
+    except LienCalendrier.DoesNotExist:
+        code = uuid4().hex
+        lien = LienCalendrier(code=code, etudiant=etudiant, periode=periode)
+        lien.save()
+    
+    return f"calendrier.ics?key={lien.code}"
+
+
 @login_required
 def dashboard(request):
     user = request.user
@@ -73,12 +86,14 @@ def dashboard(request):
     groupe = etudiant.groupe_de_colle(periode)
     rotations = groupe.get_colles_par_sem()
     template = loader.get_template("dashboard.html")
+    lien_calendrier = get_lien_calendrier(etudiant, periode)
 
     context = {
         "etudiant": etudiant,
         "periode": periode,
         "groupe": groupe,
         "rotations" : rotations,
+        "lien_calendrier": lien_calendrier,
     }
 
     return HttpResponse(template.render(context, request))
@@ -155,29 +170,27 @@ def colloscope(request):
 def export(request):
     return HttpResponse(bytes(handle(request).output()), content_type="application/pdf")
 
-@login_required
-def icalendar(request):
-    user = request.user
-    session = request.session
-    
+
+def get_lien_calendrier(etudiant, periode):
     try:
-        etudiant = Profil.from_request(
-                request,
-                preprocess=lambda query: query \
-                        .select_related("etudiant__classe") \
-                        .prefetch_related("etudiant__classe__periode_set")
-            )
-    except ValueError:
-        return redirect("colloscope.choix_profil")
-
-    if not isinstance(etudiant, Etudiant):
-        return HttpResponse("pas encore supporté")
-
-    periode = etudiant.classe.periode_actuelle()
-
-    return HttpResponse(to_calendar(etudiant, periode).to_ical(), content_type="text/calendar")
-
+        lien = LienCalendrier.objects.get(etudiant=etudiant, periode=periode)
+    except LienCalendrier.DoesNotExist:
+        code = uuid4().hex
+        lien = LienCalendrier(code=code, etudiant=etudiant, periode=periode)
+        lien.save()
     
+    return f"calendrier.ics?key={lien.code}"
+
+def icalendar(request):
+    if request.GET.get("key") is not None:
+        try:
+            lien = LienCalendrier.objects.get(code=request.GET.get("key"))
+
+            return HttpResponse(to_calendar(lien.etudiant, lien.periode).to_ical(), content_type="text/calendar")
+        except LienCalendrier.DoesNotExist:
+            return HttpResponse("Invalid key", status_code=404)
+    else:
+        return icalendar_aux(request)
 
 def data_dump(request):
     template = loader.get_template("data_dump.html")