fix a number of issues and start adding resources

atlas/models.py

@@ -364,6 +364,8 @@ class Case(models.Model, AuthorMixin, QuestionMixin):
         blank=True,
     )
 
+    resource = models.ManyToManyField("Resource", through="CaseResource")
+
     def get_app_name(self):
         return "atlas"
 
@@ -1142,3 +1144,33 @@ class UncategorisedDicom(models.Model):
 
 class DuplicateDicom(Exception):
     pass
+
+class Resource(models.Model, AuthorMixin):
+    name = models.CharField(max_length=255)
+    description = models.TextField(blank=True, null=True)
+    url = models.URLField(blank=True, null=True)
+    file = models.FileField(upload_to="atlas/resources/", blank=True, null=True)
+    author = models.ManyToManyField(
+        settings.AUTH_USER_MODEL,
+        blank=True,
+        help_text="Author of the resource",
+        related_name="resources",
+    )
+
+    def __str__(self) -> str:
+        return self.name
+
+    def get_absolute_url(self):
+        return reverse("atlas:resource_detail", kwargs={"pk": self.pk})
+
+    def get_link(self):
+        return format_html("<a href='{}'>{}</a>", self.get_absolute_url(), self.name)
+
+class CaseResource(models.Model):
+    resource = models.ForeignKey(Resource, on_delete=models.CASCADE)
+    case = models.ForeignKey(Case, on_delete=models.CASCADE)
+
+    pre_review = models.BooleanField(default=False)
+
+    def __str__(self) -> str:
+        return f"{self.resource} - {self.case}"