Baby steps towards data download function

packages/api/generated-schema.gql

@@ -8360,12 +8360,6 @@ type Mutation {
     """
     input: SubmitDataUploadInput!
   ): SubmitDataUploadPayload
-  tableOfContentsItemsPrimaryDownloadUrl(
-    """
-    The exclusive input argument for this mutation. An object type, make sure to see documentation for this object’s fields.
-    """
-    input: TableOfContentsItemsPrimaryDownloadUrlInput!
-  ): TableOfContentsItemsPrimaryDownloadUrlPayload
 
   """
   Toggle admin access for the given project and user. User must have already
@@ -13282,6 +13276,7 @@ type TableOfContentsItem implements Node {
   
   """
   parentStableId: String
+  primaryDownloadUrl: String
   project: Project
   projectId: Int!
 
@@ -13548,31 +13543,6 @@ enum TableOfContentsItemsOrderBy {
   PROJECT_ID_DESC
 }
 
-"""All input for the `tableOfContentsItemsPrimaryDownloadUrl` mutation."""
-input TableOfContentsItemsPrimaryDownloadUrlInput {
-  """
-  An arbitrary string value with no semantic meaning. Will be included in the
-  payload verbatim. May be used to track mutations by the client.
-  """
-  clientMutationId: String
-  item: TableOfContentsItemInput
-}
-
-"""The output of our `tableOfContentsItemsPrimaryDownloadUrl` mutation."""
-type TableOfContentsItemsPrimaryDownloadUrlPayload {
-  """
-  The exact same `clientMutationId` that was provided in the mutation input,
-  unchanged and unused. May be used by a client to track mutations.
-  """
-  clientMutationId: String
-
-  """
-  Our root query field type. Allows us to run any query from our mutation payload.
-  """
-  query: Query
-  string: String
-}
-
 enum TileScheme {
   TMS
   XYZ

packages/api/migrations/committed/000291.sql

@@ -0,0 +1,50 @@
+--! Previous: sha1:f4cd21cedac1eb31ea84100cbf8d8a3452540402
+--! Hash: sha1:d70db66b6510ada0a863d3d17bb89203fd3c8036
+
+-- Enter migration here
+grant execute on function table_of_contents_items_primary_download_url to anon;
+
+alter table data_upload_outputs add column if not exists original_filename text;
+
+update
+  data_upload_outputs
+set
+  original_filename = data_sources.uploaded_source_filename
+from
+  data_sources
+where
+  data_upload_outputs.data_source_id = data_sources.id
+and
+  data_upload_outputs.is_original = true;
+
+create or replace function table_of_contents_items_primary_download_url(item table_of_contents_items)
+  returns text
+  security definer
+  stable
+  language sql
+  as $$
+    select 
+      case
+        when item.enable_download = false then null
+        when item.data_layer_id is null then null
+        else
+          (
+            select 
+              data_upload_outputs.url || '?download=' || data_upload_outputs.original_filename
+            from 
+              data_upload_outputs
+            where 
+              data_upload_outputs.data_source_id = (
+                select 
+                  data_layers.data_source_id
+                from 
+                  data_layers
+                where 
+                  data_layers.id = item.data_layer_id
+              )
+            and 
+              data_upload_outputs.is_original = true
+              limit 1
+          )
+      end;
+  $$;