💚 Install libmagic in CI

apps/participation/models.py

@@ -1,3 +1,6 @@
+import re
+
+from django.core.exceptions import ObjectDoesNotExist
 from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Index
@@ -63,10 +66,10 @@ class Participation(models.Model):
         verbose_name=_("problem number"),
     )
 
-    solution = models.ForeignKey(
+    solution = models.OneToOneField(
         "participation.Video",
         on_delete=models.SET_NULL,
-        related_name="+",
+        related_name="participation_solution",
         null=True,
         default=None,
         verbose_name=_("solution video"),
@@ -81,10 +84,10 @@ class Participation(models.Model):
         verbose_name=_("received participation"),
     )
 
-    synthesis = models.ForeignKey(
+    synthesis = models.OneToOneField(
         "participation.Video",
         on_delete=models.SET_NULL,
-        related_name="+",
+        related_name="participation_synthesis",
         null=True,
         default=None,
         verbose_name=_("synthesis video"),
@@ -99,12 +102,6 @@ class Participation(models.Model):
 
 
 class Video(models.Model):
-    participation = models.ForeignKey(
-        "participation.Participation",
-        on_delete=models.CASCADE,
-        verbose_name=_("participation"),
-    )
-
     link = models.URLField(
         verbose_name=_("link"),
         help_text=_("The full video link."),
@@ -117,6 +114,24 @@ class Video(models.Model):
         help_text=_("The video got the validation of the administrators."),
     )
 
+    @property
+    def participation(self):
+        try:
+            return self.participation_solution
+        except ObjectDoesNotExist:
+            return self.participation_synthesis
+
+    @property
+    def platform(self):
+        if "youtube.com" in self.link or "youtu.be" in self.link:
+            return "youtube"
+        return "unknown"
+
+    @property
+    def youtube_code(self):
+        return re.compile("(https?://|)(www\\.|)(youtube\\.com/watch\\?v=|youtu\\.be/)([a-zA-Z0-9-_]*)?.*?")\
+            .match("https://www.youtube.com/watch?v=73nsrixx7eI").group(4)
+
     def __str__(self):
         return _("Video of team {name} ({trigram})")\
             .format(name=self.participation.team.name, trigram=self.participation.team.trigram)