Allow displaying more users at once in Differential overview

Summary:
I want to check the work of several people (bootcampers) at once.
This implements the OR filter required for that.
In the next diff, I plan to implement also the AND filter which can be useful too.

Test Plan:
Searched for several people, clicked all filters.
Searched for one person, verified that pretty URL is still created.

Reviewers: epriestley

Reviewed By: epriestley

CC: wez, aran, Korvin

Differential Revision: https://secure.phabricator.com/D4404

src/applications/differential/application/PhabricatorApplicationDifferential.php

@@ -71,7 +71,7 @@ final class PhabricatorApplicationDifferential extends PhabricatorApplication {
 
     list($active, $waiting) = DifferentialRevisionQuery::splitResponsible(
       $revisions,
-      $user->getPHID());
+      array($user->getPHID()));
 
     $status = array();
 

src/applications/differential/controller/DifferentialRevisionListController.php

@@ -33,27 +33,23 @@ final class DifferentialRevisionListController extends DifferentialController {
       $default_filter);
 
     // Redirect from search to canonical URL.
-    $phid_arr = $request->getArr('view_user');
+    $phid_arr = $request->getArr('view_users');
     if ($phid_arr) {
-      $view_user = id(new PhabricatorUser())
-        ->loadOneWhere('phid = %s', head($phid_arr));
+      $view_users = id(new PhabricatorUser())
+        ->loadAllWhere('phid IN (%Ls)', $phid_arr);
 
-      $base_uri = '/differential/filter/'.$this->filter.'/';
-      if ($view_user) {
-        // This is a user, so generate a pretty URI.
-        $uri = $base_uri.phutil_escape_uri($view_user->getUserName()).'/';
-      } else {
-        // We're assuming this is a mailing list, generate an ugly URI.
-        $uri = $base_uri;
-        $params['phid'] = head($phid_arr);
-      }
-
-      $uri = new PhutilURI($uri);
+      if (count($view_users) == 1) {
+        // This is a single user, so generate a pretty URI.
+        $uri = new PhutilURI(
+          '/differential/filter/'.$this->filter.'/'.
+          phutil_escape_uri(reset($view_users)->getUserName()).'/');
         $uri->setQueryParams($params);
 
         return id(new AphrontRedirectResponse())->setURI($uri);
       }
 
+    }
+
     $uri = new PhutilURI('/differential/filter/'.$this->filter.'/');
     $uri->setQueryParams($params);
 
@@ -66,18 +62,19 @@ final class DifferentialRevisionListController extends DifferentialController {
       }
       $username = phutil_escape_uri($this->username).'/';
       $uri->setPath('/differential/filter/'.$this->filter.'/'.$username);
-      $params['phid'] = $view_user->getPHID();
+      $params['view_users'] = array($view_user->getPHID());
     } else {
-      $phid = $request->getStr('phid');
-      if (strlen($phid)) {
-        $params['phid'] = $phid;
+      $phids = $request->getArr('view_users');
+      if ($phids) {
+        $params['view_users'] = $phids;
+        $uri->setQueryParams($params);
       }
     }
 
     // Fill in the defaults we'll actually use for calculations if any
     // parameters are missing.
     $params += array(
-      'phid' => $user->getPHID(),
+      'view_users' => array($user->getPHID()),
       'status' => 'all',
       'order' => 'modified',
     );
@@ -97,7 +94,7 @@ final class DifferentialRevisionListController extends DifferentialController {
     $panels = array();
     $handles = array();
     $controls = $this->getFilterControls($this->filter);
-    if ($this->getFilterRequiresUser($this->filter) && !$params['phid']) {
+    if ($this->getFilterRequiresUser($this->filter) && !$params['view_users']) {
       // In the anonymous case, we still want to let you see some user's
       // list, but we don't have a default PHID to provide (normally, we use
       // the viewing user's). Show a warning instead.
@@ -108,7 +105,7 @@ final class DifferentialRevisionListController extends DifferentialController {
         'This filter requires that a user be specified above.');
       $panels[] = $warning;
     } else {
-      $query = $this->buildQuery($this->filter, $params['phid']);
+      $query = $this->buildQuery($this->filter, $params['view_users']);
 
       $pager = null;
       if ($this->getFilterAllowsPaging($this->filter)) {
@@ -131,7 +128,10 @@ final class DifferentialRevisionListController extends DifferentialController {
         $revisions = $pager->sliceResults($revisions);
       }
 
-      $views = $this->buildViews($this->filter, $params['phid'], $revisions);
+      $views = $this->buildViews(
+        $this->filter,
+        $params['view_users'],
+        $revisions);
 
       $view_objects = array();
       foreach ($views as $view) {
@@ -139,8 +139,9 @@ final class DifferentialRevisionListController extends DifferentialController {
           $view_objects[] = $view['view'];
         }
       }
-      $phids = array_mergev(mpull($view_objects, 'getRequiredHandlePHIDs'));
-      $phids[] = $params['phid'];
+      $phids = mpull($view_objects, 'getRequiredHandlePHIDs');
+      $phids[] = $params['view_users'];
+      $phids = array_mergev($phids);
       $handles = $this->loadViewerHandles($phids);
 
       foreach ($views as $view) {
@@ -275,28 +276,28 @@ final class DifferentialRevisionListController extends DifferentialController {
     return $controls[$filter];
   }
 
-  private function buildQuery($filter, $user_phid) {
+  private function buildQuery($filter, array $user_phids) {
     $query = new DifferentialRevisionQuery();
 
     $query->needRelationships(true);
 
     switch ($filter) {
       case 'active':
-        $query->withResponsibleUsers(array($user_phid));
+        $query->withResponsibleUsers($user_phids);
         $query->withStatus(DifferentialRevisionQuery::STATUS_OPEN);
         $query->setLimit(null);
         break;
       case 'revisions':
-        $query->withAuthors(array($user_phid));
+        $query->withAuthors($user_phids);
         break;
       case 'reviews':
-        $query->withReviewers(array($user_phid));
+        $query->withReviewers($user_phids);
         break;
       case 'subscribed':
-        $query->withSubscribers(array($user_phid));
+        $query->withSubscribers($user_phids);
         break;
       case 'drafts':
-        $query->withDraftRepliesByAuthors(array($user_phid));
+        $query->withDraftRepliesByAuthors($user_phids);
         break;
       case 'all':
         break;
@@ -315,28 +316,23 @@ final class DifferentialRevisionListController extends DifferentialController {
     switch ($control) {
       case 'subscriber':
       case 'phid':
-        $view_phid = $params['phid'];
-        $value = array();
-        if ($view_phid) {
-          $value = array(
-            $view_phid => $handles[$view_phid]->getFullName(),
-          );
-        }
+        $value = mpull(
+          array_select_keys($handles, $params['view_users']),
+          'getFullName');
 
         if ($control == 'subscriber') {
           $source = '/typeahead/common/allmailable/';
-          $label = 'View Subscriber';
+          $label = 'View Subscribers';
         } else {
           $source = '/typeahead/common/accounts/';
-          $label  = 'View User';
+          $label  = 'View Users';
         }
 
         return id(new AphrontFormTokenizerControl())
           ->setDatasource($source)
           ->setLabel($label)
-          ->setName('view_user')
-          ->setValue($value)
-          ->setLimit(1);
+          ->setName('view_users')
+          ->setValue($value);
       case 'status':
         return id(new AphrontFormToggleButtonsControl())
           ->setLabel('Status')
@@ -389,7 +385,7 @@ final class DifferentialRevisionListController extends DifferentialController {
     }
   }
 
-  private function buildViews($filter, $user_phid, array $revisions) {
+  private function buildViews($filter, array $user_phids, array $revisions) {
     assert_instances_of($revisions, 'DifferentialRevision');
 
     $user = $this->getRequest()->getUser();
@@ -403,7 +399,7 @@ final class DifferentialRevisionListController extends DifferentialController {
       case 'active':
         list($active, $waiting) = DifferentialRevisionQuery::splitResponsible(
           $revisions,
-          $user_phid);
+          $user_phids);
 
         $view = id(clone $template)
           ->setHighlightAge(true)
@@ -416,9 +412,9 @@ final class DifferentialRevisionListController extends DifferentialController {
 
         // Flags are sort of private, so only show the flag panel if you're
         // looking at your own requests.
-        if ($user_phid == $user->getPHID()) {
+        if (in_array($user->getPHID(), $user_phids)) {
           $flags = id(new PhabricatorFlagQuery())
-            ->withOwnerPHIDs(array($user_phid))
+            ->withOwnerPHIDs(array($user->getPHID()))
             ->withTypes(array(PhabricatorPHIDConstants::PHID_TYPE_DREV))
             ->needHandles(true)
             ->execute();

src/applications/differential/query/DifferentialRevisionQuery.php

@@ -891,7 +891,7 @@ final class DifferentialRevisionQuery {
     }
   }
 
-  public static function splitResponsible(array $revisions, $user_phid) {
+  public static function splitResponsible(array $revisions, array $user_phids) {
     $active = array();
     $waiting = array();
     $status_review = ArcanistDifferentialRevisionStatus::NEEDS_REVIEW;
@@ -901,7 +901,7 @@ final class DifferentialRevisionQuery {
     // something about).
     foreach ($revisions as $revision) {
       $needs_review = ($revision->getStatus() == $status_review);
-      $filter_is_author = ($revision->getAuthorPHID() == $user_phid);
+      $filter_is_author = in_array($revision->getAuthorPHID(), $user_phids);
 
       // If exactly one of "needs review" and "the user is the author" is
       // true, the user needs to act on it. Otherwise, they're waiting on

src/applications/directory/controller/PhabricatorDirectoryMainController.php

@@ -241,7 +241,7 @@ final class PhabricatorDirectoryMainController
 
     list($active, $waiting) = DifferentialRevisionQuery::splitResponsible(
       $revisions,
-      $user_phid);
+      array($user_phid));
 
     if (!$active) {
       return $this->renderMiniPanel(