remove a separate view for uploading a file for an existing version

@@ -684,0 +679,4 @@
+
+    @property
+    def can_upload_more_files(self):
+        return len(self.get_available_platforms()) > 0

@@ -684,0 +706,4 @@
+            for p in to_delete:
+                self.platforms.remove(Platform.objects.get(slug=p))
+
+    def get_available_platforms(self):

@@ -713,3 +758,3 @@
-    def download_name(self) -> str:
+    def _get_download_name(self, platform=None) -> str:
         """Return a file name for downloads."""
         replace_char = f'{self}'.replace('.', '-')

@@ -715,2 +760,3 @@
         replace_char = f'{self}'.replace('.', '-')
-        return f'{utils.slugify(replace_char)}{self.file.suffix}'
+        if platform:
+            return f'{utils.slugify(replace_char)}.{platform}.zip'

@@ -82,0 +77,4 @@
+                    continue
+                # TODO? return all matching files (when no self.platform is passed)?
+                matching_file = file
+                matching_version = v

@@ -194,3 +199,3 @@
             'licenses': data.get('license'),
             'permissions': data.get('permissions'),
-            'platforms': build_generated_platforms or data.get('platforms'),
+            'platforms': self.platforms(),

@@ -82,0 +76,4 @@
+                if self.platform and (platforms and self.platform not in platforms):
+                    continue
+                # TODO? return all matching files (when no self.platform is passed)?
+                matching_file = file

@@ -744,6 +799,54 @@ class Version(CreatedModifiedMixin, TrackChangesMixin, models.Model):
             download_url += f'?{query_string}'
         return download_url