routes: handle case of viewing deleted entity in editgroup context

Eg, consider deleting an entity. When viewing the editgroup, want to be
able to click the deleted entity and see the "deleted entity" page
instead of a generic 404.

1 files changed, 26 insertions, 1 deletions

diff --git a/python/fatcat_web/entity_helpers.py b/python/fatcat_web/entity_helpers.py
index c9a57290..7156b9be 100644
--- a/python/fatcat_web/entity_helpers.py
+++ b/python/fatcat_web/entity_helpers.py
@@ -1,5 +1,6 @@
 
 from flask import abort
+from fatcat_openapi_client import *
 from fatcat_openapi_client.rest import ApiException, ApiValueError
 from fatcat_tools.transforms import *
 from fatcat_web import api
@@ -148,6 +149,26 @@ def generic_get_entity_revision(entity_type, revision_id):
     except ApiValueError:
         abort(400)
 
+def generic_deleted_entity(entity_type, ident):
+    if entity_type == 'container':
+        entity = ContainerEntity()
+    elif entity_type == 'creator':
+        entity = CreatorEntity()
+    elif entity_type == 'file':
+        entity = FileEntity()
+    elif entity_type == 'fileset':
+        entity = FilesetEntity()
+    elif entity_type == 'webcapture':
+        entity = WebcaptureEntity()
+    elif entity_type == 'release':
+        entity = ReleaseEntity()
+    elif entity_type == 'work':
+        entity = WorkEntity()
+    else:
+        raise NotImplementedError
+    entity.ident = ident
+    return entity
+
 def generic_get_editgroup_entity(editgroup, entity_type, ident):
     if entity_type == 'container':
         edits = editgroup.edits.containers
@@ -166,14 +187,18 @@ def generic_get_editgroup_entity(editgroup, entity_type, ident):
     else:
         raise NotImplementedError
     revision_id = None
+    edit = None
     for e in edits:
         if e.ident == ident:
             revision_id = e.revision
             edit = e
             break
-    if not revision_id:
+    if not edit:
         # couldn't find relevant edit in this editgroup
         abort(404)
+    if not revision_id:
+        # deletion, presumably
+        return generic_deleted_entity(entity_type, ident), edit
 
     try:
         entity = generic_get_entity_revision(entity_type, revision_id)