Generate Download URL from purl in Add package #14

Signed-off-by: tdruez <tdruez@nexb.com>

component_catalog/views.py

@@ -46,6 +46,7 @@
 from natsort import natsorted
 from notifications.signals import notify
 from packageurl import PackageURL
+from packageurl.contrib import purl2url
 from packageurl.contrib import url2purl
 
 from component_catalog.filters import ComponentFilterSet
@@ -1897,11 +1898,6 @@ def get_initial(self):
         """Pre-fill the form with initial data from a PurlDB entry or a `package_url`."""
         initial = super().get_initial()
 
-        if package_url := self.request.GET.get("package_url", None):
-            purl = PackageURL.from_string(package_url)
-            package_url_dict = purl.to_dict(encode=True, empty="")
-            initial.update(package_url_dict)
-
         if purldb_entry := self.get_entry_from_purldb():
             purldb_entry["license_expression"] = purldb_entry.get("declared_license_expression")
             model_fields = [
@@ -1917,6 +1913,13 @@ def get_initial(self):
             }
             initial.update(initial_from_purldb_entry)
 
+        elif package_url := self.request.GET.get("package_url", None):
+            purl = PackageURL.from_string(package_url)
+            package_url_dict = purl.to_dict(encode=True, empty="")
+            initial.update(package_url_dict)
+            if download_url := purl2url.get_download_url(package_url):
+                initial.update({"download_url": download_url})
+
         return initial
 
     def get_entry_from_purldb(self):