Added basic hovercard controller

Summary:
Refs T1048; Depends on D5542, D5543, D5544 - It currently just renders multiple hovercards nicely for test purposes. More is on the way.

Mode `test`: Human test chamber.
Mode `retrieve`: For JS. Added so it would not clash with search key routing.

badassery

Test Plan:
`/search/hovercard/test/?phids[hover-T4]=PHID-TASK-g5pduvwrrwvkq5gkx736&phids[hover-T2]=PHID-TASK-gta6lzaaagziavkktima`

Verified the appearance of two tasks with correct rendering and correct ids

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5545

src/__phutil_library_map__.php

@@ -1300,6 +1300,7 @@ phutil_register_library_map(array(
     'PhabricatorSearchEngineMySQL' => 'applications/search/engine/PhabricatorSearchEngineMySQL.php',
     'PhabricatorSearchEngineSelector' => 'applications/search/selector/PhabricatorSearchEngineSelector.php',
     'PhabricatorSearchField' => 'applications/search/constants/PhabricatorSearchField.php',
+    'PhabricatorSearchHovercardController' => 'applications/search/controller/PhabricatorSearchHovercardController.php',
     'PhabricatorSearchIndexer' => 'applications/search/index/PhabricatorSearchIndexer.php',
     'PhabricatorSearchManagementIndexWorkflow' => 'applications/search/management/PhabricatorSearchManagementIndexWorkflow.php',
     'PhabricatorSearchManagementWorkflow' => 'applications/search/management/PhabricatorSearchManagementWorkflow.php',
@@ -2962,6 +2963,7 @@ phutil_register_library_map(array(
     'PhabricatorSearchDocumentRelationship' => 'PhabricatorSearchDAO',
     'PhabricatorSearchEngineElastic' => 'PhabricatorSearchEngine',
     'PhabricatorSearchEngineMySQL' => 'PhabricatorSearchEngine',
+    'PhabricatorSearchHovercardController' => 'PhabricatorSearchBaseController',
     'PhabricatorSearchManagementIndexWorkflow' => 'PhabricatorSearchManagementWorkflow',
     'PhabricatorSearchManagementWorkflow' => 'PhutilArgumentWorkflow',
     'PhabricatorSearchQuery' => 'PhabricatorSearchDAO',

src/aphront/configuration/AphrontDefaultApplicationConfiguration.php

@@ -81,6 +81,8 @@ class AphrontDefaultApplicationConfiguration
         'select/(?P<type>\w+)/'
           => 'PhabricatorSearchSelectController',
         'index/(?P<phid>[^/]+)/' => 'PhabricatorSearchIndexController',
+        'hovercard/(?P<mode>retrieve|test)/' =>
+          'PhabricatorSearchHovercardController',
       ),
 
       '/status/' => 'PhabricatorStatusController',

src/applications/search/controller/PhabricatorSearchHovercardController.php

@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * @group search
+ */
+final class PhabricatorSearchHovercardController
+  extends PhabricatorSearchBaseController {
+
+  public function processRequest() {
+    $request = $this->getRequest();
+    $user = $request->getUser();
+
+    $phids = $request->getArr('phids');
+
+    $handle_data = new PhabricatorObjectHandleData($phids);
+    $handle_data->setViewer($user);
+    $handles = $handle_data->loadHandles();
+    $objects = $handle_data->loadObjects();
+
+    $cards = array();
+
+    foreach ($phids as $phid) {
+      $handle = $handles[$phid];
+
+      $hovercard = new PhabricatorHovercardView();
+      $hovercard->setObjectHandle($handle);
+
+      // Send it to the other side of the world, thanks to PhutilEventEngine
+      $event = new PhabricatorEvent(
+        PhabricatorEventType::TYPE_UI_DIDRENDERHOVERCARD,
+        array(
+          'hovercard' => $hovercard,
+          'handle'    => $handle,
+          'object'    => idx($objects, $phid),
+        ));
+      $event->setUser($user);
+      PhutilEventEngine::dispatchEvent($event);
+
+      $cards[$phid] = $hovercard;
+    }
+
+    // Browser-friendly for non-Ajax requests
+    if (!$request->isAjax()) {
+      foreach ($cards as $key => $hovercard) {
+        $cards[$key] = phutil_tag('div',
+          array(
+            'style' => 'margin: 20px;',
+          ),
+          $hovercard);
+      }
+
+      return $this->buildApplicationPage(
+        $cards,
+        array(
+          'dust' => true,
+        ));
+    }
+
+    // TODO: Write a reasonable way to provide client-side-ready hovercard
+    // put-into-the-browser markup (coming in the next diff)
+  }
+
+}