[WIP] Paginate History Store

Trying an approach with v-infinite-scroll in selector modal

lib/galaxy/webapps/galaxy/api/histories.py

@@ -131,6 +131,17 @@ class FastAPIHistories:
             trans, serialization_params, filter_query_params, deleted_only=deleted, all_histories=all
         )
 
+    # THIS IS JUST A DUMMY ROUTE FOR WIP testing
+    @router.get(
+        "/api/histories/count",
+        summary="Returns number of histories for the current user.",
+    )
+    def count(
+        self,
+        trans: ProvidesHistoryContext = DependsOnTrans,
+    ) -> int:
+        return self.service.count(trans)
+
     @router.get(
         "/api/histories/deleted",
         summary="Returns deleted histories for the current user.",

lib/galaxy/webapps/galaxy/services/histories.py

@@ -462,6 +462,23 @@ class HistoriesService(ServiceBase, ConsumesModelStores, ServesExportStores):
         ]
         return rval
 
+    # THIS IS JUST A DUMMY FN FOR WIP testing
+    def count(
+        self,
+        trans: ProvidesHistoryContext,
+    ):
+        """
+        Returns number of histories for the current user.
+        """
+        # bail early with current history if user is anonymous
+        current_user = self.user_manager.current_user(trans)
+        if self.user_manager.is_anonymous(current_user):
+            current_history = self.manager.get_current(trans)
+            if not current_history:
+                return 0
+            return 1
+        return len(current_user.active_histories)
+
     def published(
         self,
         trans: ProvidesHistoryContext,