Tag Rules can be rearranged in UI to set priority

app/assets/javascripts/admin/utils/directives/sortable.js.coffee

@@ -0,0 +1,36 @@
+angular.module("admin.utils").directive "ofnSortable", ($timeout, $parse) ->
+  restrict: "E"
+  scope:
+    items: '@'
+    position: '@'
+    afterSort: '&'
+    handle: "@"
+    axis: "@"
+  link: (scope, element, attrs) ->
+    $timeout ->
+      scope.axis ||= "y"
+      scope.handle ||= ".handle"
+      getScopePos = $parse(scope.position)
+      setScopePos = getScopePos.assign
+
+      element.sortable
+        handle: scope.handle
+        helper: 'clone'
+        axis: scope.axis
+        items: scope.items
+        appendTo: element
+        update: (event, ui) ->
+          sortableSiblings = ($(ss) for ss in ui.item.siblings(scope.items))
+          offset = Math.min(ui.item.index(), sortableSiblings[0].index())
+          newPos = ui.item.index() - offset + 1
+          oldPos = getScopePos(ui.item.scope())
+          if newPos < oldPos
+            for sibScope in sortableSiblings.map((ss) -> ss.scope())
+              pos = getScopePos(sibScope)
+              setScopePos(sibScope, pos + 1) if pos >= newPos && pos < oldPos
+          else if newPos > oldPos
+            for sibScope in sortableSiblings.map((ss) -> ss.scope())
+              pos = getScopePos(sibScope)
+              setScopePos(sibScope, pos - 1) if pos > oldPos && pos <= newPos
+          setScopePos(ui.item.scope(), newPos)
+          scope.afterSort()