Index tags in search

Now a user can search for all stories that have a specified tag.

Change-Id: Ib420c1b7989022bc27fa3e931f13ee08ee1132c6

src/app/search/template/criteria_tag_item.html

@@ -22,6 +22,13 @@
             ×
         </a>
     </div>
+    <div class="tag tag-warning" ng-switch-when="Tags">
+        Tag: {{tag.title}}
+        <a class="tag-remove"
+           ng-click="removeTag({tag:tag})">
+            &times;
+        </a>
+    </div>
     <div class="tag tag-success" ng-switch-when="User">
         <i class="fa fa-user"></i> {{tag.title}}
         <a class="tag-remove"

src/app/search/template/typeahead_criteria_item.html

@@ -4,6 +4,9 @@
     <span ng-switch-when="Text">
         <i class="fa fa-search text-muted"></i>&emsp;{{match.model.title}}
     </span>
+    <span ng-switch-when="Tags">
+        <i class="fa fa-tag text-muted"></i>&emsp;{{match.model.title}}
+    </span>
     <span ng-switch-when="Story">
         <i class="fa fa-sb-story text-muted"></i>&emsp;{{match.model.value}}:
         {{match.model.title}}

src/app/services/criteria/tags.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2016 Codethink Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+
+/**
+ * This criteria resolver may be injected by individual resources that accept a
+ * Tags search parameter.
+ */
+angular.module('sb.services').factory('Tags',
+    function (Criteria, $q) {
+        'use strict';
+
+        /**
+         * Return a Tags search parameter constructed from the passed search
+         * string.
+         */
+
+        return {
+            criteriaResolver: function (searchString) {
+                var deferred = $q.defer();
+                deferred.resolve([Criteria.create('Tags', searchString)]);
+
+                return deferred.promise;
+            }
+        };
+    });

src/app/services/resource/story.js

@@ -57,6 +57,7 @@ angular.module('sb.services').factory('Story',
             {
                 Text: 'q',
                 StoryStatus: 'status',
+                Tags: 'tags',
                 ProjectGroup: 'project_group_id',
                 Project: 'project_id',
                 User: 'assignee_id'