metadata-store: based on discussion with @ixv, made differences between graphs and groups in metadatum more clear

pkg/arvo/app/hark-graph-hook.hoon

@@ -280,8 +280,9 @@
       (peek-metadatum:met %graph rid)
     ?~  metadatum  `state
     =/  module=term
-      ?.  ?=(%& -.module.u.metadatum)  %$
-      p.module.u.metadatum
+      ?:  ?=(%empty -.config.u.metadatum)  %$
+      ?:  ?=(%group -.config.u.metadatum)  %$
+      module.config.u.metadatum
     abet:check:(abed:handle-update:ha rid nodes u.group module)
   --
 ::

pkg/arvo/app/metadata-store.hoon

@@ -273,10 +273,10 @@
       creator       creator.m
       preview       preview.m
     ::
-        module        
+        config
       ?:  =(module.m %$)
-        [%| ~]
-      [%& module.m]
+        [%group ~]
+      [%graph module.m]
     ==
   ::
   ++  associations-1-to-2
@@ -303,7 +303,7 @@
   ::
   ++  metadata-1-to-2
     |=  m=metadata-1
-    %*  .  *metadatum:store
+    %*  .  *metadatum-2
       title         title.m
       description   description.m
       color         color.m

pkg/arvo/lib/metadata-store.hoon

@@ -47,16 +47,22 @@
         [%date-created s+(scot %da date-created.met)]
         [%creator s+(scot %p creator.met)]
       ::
-        :-  %module
-        ?:  ?=(%& -.module.met)
-          s+p.module.met
-        ?~  p.module.met
-          ~
-        ?~  u.p.module.met
-          o+~
-        %-  pairs
-        :~  [%app-name s+app-name.u.u.p.module.met]
-            [%resource s+(enjs-path:resource resource.u.u.p.module.met)]
+        :-  %config
+        ?+    -.config.met  o+~
+            %graph
+          %+  frond  %graph
+          s+module.config.met
+        ::
+            %group
+          %+  frond  %group
+          ?~  feed.config.met
+            ~
+          ?~  u.feed.config.met
+            o+~
+          %-  pairs
+          :~  [%app-name s+app-name.u.u.feed.config.met]
+              [%resource s+(enjs-path:resource resource.u.u.feed.config.met)]
+          ==
         ==
       ::
         [%picture s+picture.met]
@@ -168,21 +174,21 @@
         [%color nu]
         [%date-created (se %da)]
         [%creator (su ;~(pfix sig fed:ag))]
-        [%module module]
+        [%config config]
         [%picture so]
         [%preview bo]
         [%vip vip]
     ==
   ::
-  ++  module
+  ++  config
     |=  jon=^json
-    ^-  (each term (unit (unit ^md-resource)))
+    ^-  md-config
     ?~  jon
-      [%| ~]
+      [%group ~]
     ?:  ?=(%s -.jon)
-      [%& p.jon]
+      [%graph p.jon]
     ?>  ?=(%o -.jon)
-    :+  %|  ~
+    :+  %group  ~
     ?.  ?&  (~(has by p.jon) 'app-name')
             (~(has by p.jon) 'resource')
         ==

pkg/arvo/sur/metadata-store.hoon

@@ -28,13 +28,20 @@
 ::    %$: No variation
 ::
 +$  vip-metadata  ?(%reader-comments %member-metadata %$)
++$  md-config
+  $~  [%empty ~]
+  $%  [%group feed=(unit (unit md-resource))]
+      [%graph module=term] 
+      [%empty ~]
+  ==
+::
 +$  metadatum
   $:  title=cord
       description=cord
       =color
       date-created=time
       creator=ship
-      module=(each term (unit (unit md-resource)))
+      config=md-config
       picture=url
       preview=?
       vip=vip-metadata