Update some APIs

- Rename DiscussionSearchWillBePerformed to ConfigureDiscussionSearch, same with users
- Add some handy methods

src/Core/Search/Discussion/DiscussionSearcher.php

@@ -16,7 +16,7 @@ use Flarum\Core\Search\SearchCriteria;
 use Flarum\Core\Search\GambitManager;
 use Flarum\Core\Repository\DiscussionRepository;
 use Flarum\Core\Repository\PostRepository;
-use Flarum\Event\DiscussionSearchWillBePerformed;
+use Flarum\Event\ConfigureDiscussionSearch;
 use Flarum\Core\Search\SearchResults;
 use Illuminate\Database\Eloquent\Collection;
 
@@ -82,7 +82,7 @@ class DiscussionSearcher
         $this->applyLimit($search, $limit + 1);
 
         // TODO: inject dispatcher
-        event(new DiscussionSearchWillBePerformed($search, $criteria));
+        event(new ConfigureDiscussionSearch($search, $criteria));
 
         // Execute the search query and retrieve the results. We get one more
         // results than the user asked for, so that we can say if there are more

src/Core/Search/User/UserSearcher.php

@@ -15,7 +15,7 @@ use Flarum\Core\Search\GambitManager;
 use Flarum\Core\Search\SearchCriteria;
 use Flarum\Core\Search\SearchResults;
 use Flarum\Core\Repository\UserRepository;
-use Flarum\Event\UserSearchWillBePerformed;
+use Flarum\Event\ConfigureUserSearch;
 
 /**
  * Takes a UserSearchCriteria object, performs a search using gambits,
@@ -68,7 +68,7 @@ class UserSearcher
         $this->applyOffset($search, $offset);
         $this->applyLimit($search, $limit + 1);
 
-        event(new UserSearchWillBePerformed($search, $criteria));
+        event(new ConfigureUserSearch($search, $criteria));
 
         // Execute the search query and retrieve the results. We get one more
         // results than the user asked for, so that we can say if there are more

src/Event/ConfigureDiscussionSearch.php

@@ -13,7 +13,7 @@ namespace Flarum\Event;
 use Flarum\Core\Search\Discussion\DiscussionSearch;
 use Flarum\Core\Search\SearchCriteria;
 
-class DiscussionSearchWillBePerformed
+class ConfigureDiscussionSearch
 {
     /**
      * @var DiscussionSearch

src/Event/ConfigureModelDates.php

@@ -37,4 +37,13 @@ class ConfigureModelDates
         $this->model = $model;
         $this->dates = &$dates;
     }
+
+    /**
+     * @param string $model
+     * @return bool
+     */
+    public function isModel($model)
+    {
+        return $this->model instanceof $model;
+    }
 }

src/Event/ConfigureUserSearch.php

@@ -13,7 +13,7 @@ namespace Flarum\Event;
 use Flarum\Core\Search\User\UserSearch;
 use Flarum\Core\Search\SearchCriteria;
 
-class UserSearchWillBePerformed
+class ConfigureUserSearch
 {
     /**
      * @var UserSearch

src/Event/PrepareApiAttributes.php

@@ -10,6 +10,7 @@
 
 namespace Flarum\Event;
 
+use DateTime;
 use Flarum\Api\Serializer\AbstractSerializer;
 
 /**
@@ -67,4 +68,15 @@ class PrepareApiAttributes
     {
         return $this->serializer instanceof $serializer;
     }
+
+    /**
+     * @param DateTime|null $date
+     * @return string|null
+     */
+    public function formatDate(DateTime $date = null)
+    {
+        if ($date) {
+            return $date->format(DateTime::RFC3339);
+        }
+    }
 }