X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/c95bf51af6261d2707421305342043f499b69f67..c19ef999c3b938e6d3cdc3746fab5bad8aba3403:/apps/workbench/app/models/arvados_resource_list.rb

diff --git a/apps/workbench/app/models/arvados_resource_list.rb b/apps/workbench/app/models/arvados_resource_list.rb
index 16a59b173e..d585b3ca9d 100644
--- a/apps/workbench/app/models/arvados_resource_list.rb
+++ b/apps/workbench/app/models/arvados_resource_list.rb
@@ -1,7 +1,7 @@
 class ArvadosResourceList
   include Enumerable
 
-  def initialize(resource_class)
+  def initialize resource_class=nil
     @resource_class = resource_class
   end
 
@@ -90,6 +90,12 @@ class ArvadosResourceList
     self
   end
 
+  def collect
+    results.collect do |m|
+      yield m
+    end
+  end
+
   def first
     results.first
   end
@@ -134,4 +140,33 @@ class ArvadosResourceList
     results.offset if results.respond_to? :offset
   end
 
+  def result_links
+    results.links if results.respond_to? :links
+  end
+
+  def links_for item_or_uuid, link_class=nil
+    unless @links_for_uuid
+      @links_for_uuid = {}
+      results.links.each do |link|
+        if link.respond_to? :head_uuid
+          @links_for_uuid[link.head_uuid] ||= []
+          @links_for_uuid[link.head_uuid] << link
+        end
+      end
+    end
+    if item_or_uuid.respond_to? :uuid
+      uuid = item_or_uuid.uuid
+    else
+      uuid = item_or_uuid
+    end
+    (@links_for_uuid[uuid] || []).select do |link|
+      link.link_class == link_class
+    end
+  end
+
+  # Note: this arbitrarily chooses one of (possibly) multiple names.
+  def names_for item_or_uuid
+    links_for(item_or_uuid, 'name').first.andand.name
+  end
+
 end