Rough data fetch for previous/next posts on a blog

Summary: Ref T9897. Not pretty, but pulls data.

Test Plan: {F1046464}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9897

Differential Revision: https://secure.phabricator.com/D14903

src/applications/phame/controller/post/PhamePostViewController.php

@@ -120,10 +120,24 @@ final class PhamePostViewController
       $add_comment = phutil_tag_div('mlb mlt', $add_comment);
     }
 
+    list($prev, $next) = $this->loadAdjacentPosts($post);
+
     $properties = id(new PHUIPropertyListView())
       ->setUser($viewer)
       ->setObject($post);
 
+    if ($next) {
+      $properties->addProperty(
+        pht('Later Posts'),
+        $viewer->renderHandleList(mpull($next, 'getPHID')));
+    }
+
+    if ($prev) {
+      $properties->addProperty(
+        pht('Earlier Posts'),
+        $viewer->renderHandleList(mpull($prev, 'getPHID')));
+    }
+
     $properties->invokeWillRenderEvent();
 
     $crumbs = $this->buildApplicationCrumbs();
@@ -236,4 +250,24 @@ final class PhamePostViewController
     return phutil_tag_div('phui-document-view-pro-box', $box);
   }
 
+  private function loadAdjacentPosts(PhamePost $post) {
+    $viewer = $this->getViewer();
+
+    $query = id(new PhamePostQuery())
+      ->setViewer($viewer)
+      ->withVisibility(PhameConstants::VISIBILITY_PUBLISHED)
+      ->withBlogPHIDs(array($post->getBlog()->getPHID()))
+      ->setLimit(2);
+
+    $prev = id(clone $query)
+      ->setAfterID($post->getID())
+      ->execute();
+
+    $next = id(clone $query)
+      ->setBeforeID($post->getID())
+      ->execute();
+
+    return array($prev, $next);
+  }
+
 }