Add UI for viewing labels on a manifest in the tags view

static/js/directives/ui/label-view.js

@@ -0,0 +1,32 @@
+/**
+ * An element which displays a single label.
+ */
+angular.module('quay').directive('labelView', function () {
+  return {
+    templateUrl: '/static/directives/label-view.html',
+    restrict: 'C',
+    replace: true,
+    scope: {
+      expand: '@expand',
+      label: '=label'
+    },
+    controller: function($scope, $sanitize) {
+      $scope.getKind = function(label) {
+        switch (label.media_type) {
+          case 'application/json':
+            return 'json';
+        }
+
+        return '';
+      };
+
+      $scope.viewLabelValue = function() {
+        bootbox.alert({
+          size: "small",
+          title: $scope.label.key,
+          message: '<pre>' + $sanitize($scope.label.value) + '</pre>'
+        });
+      };
+    }
+  };
+});