Improve browsability of Projects query

Summary:
Ref T5750. Same deal as D12427, but for projects.

(As before, mostly making the empty/browse view work instead of return nothing.)

Test Plan: {F372353}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5750

Differential Revision: https://secure.phabricator.com/D12428

src/applications/project/query/PhabricatorProjectQuery.php

@@ -9,7 +9,7 @@ final class PhabricatorProjectQuery
   private $slugs;
   private $phrictionSlugs;
   private $names;
-  private $datasourceQuery;
+  private $nameTokens;
   private $icons;
   private $colors;
 
@@ -60,8 +60,8 @@ final class PhabricatorProjectQuery
     return $this;
   }
 
-  public function withDatasourceQuery($string) {
-    $this->datasourceQuery = $string;
+  public function withNameTokens(array $tokens) {
+    $this->nameTokens = array_values($tokens);
     return $this;
   }
 
@@ -329,7 +329,7 @@ final class PhabricatorProjectQuery
   }
 
   private function buildGroupClause($conn_r) {
-    if ($this->memberPHIDs || $this->datasourceQuery) {
+    if ($this->memberPHIDs || $this->nameTokens) {
       return 'GROUP BY p.id';
     } else {
       return $this->buildApplicationSearchGroupClause($conn_r);
@@ -363,23 +363,18 @@ final class PhabricatorProjectQuery
         id(new PhabricatorProjectSlug())->getTableName());
     }
 
-    if ($this->datasourceQuery !== null) {
-      $tokens = PhabricatorTypeaheadDatasource::tokenizeString(
-        $this->datasourceQuery);
-      if (!$tokens) {
-        throw new PhabricatorEmptyQueryException();
-      }
-
-      $likes = array();
-      foreach ($tokens as $token) {
-        $likes[] = qsprintf($conn_r, 'token.token LIKE %>', $token);
-      }
-
+    if ($this->nameTokens !== null) {
+      foreach ($this->nameTokens as $key => $token) {
+        $token_table = 'token_'.$key;
         $joins[] = qsprintf(
           $conn_r,
-        'JOIN %T token ON token.projectID = p.id AND (%Q)',
+          'JOIN %T %T ON %T.projectID = p.id AND %T.token LIKE %>',
           PhabricatorProject::TABLE_DATASOURCE_TOKEN,
-        '('.implode(') OR (', $likes).')');
+          $token_table,
+          $token_table,
+          $token_table,
+          $token);
+      }
     }
 
     $joins[] = $this->buildApplicationSearchJoinClause($conn_r);

src/applications/project/query/PhabricatorProjectSearchEngine.php

@@ -55,7 +55,8 @@ final class PhabricatorProjectSearchEngine
 
     $name = $saved->getParameter('name');
     if (strlen($name)) {
-      $query->withDatasourceQuery($name);
+      $tokens = PhabricatorTypeaheadDatasource::tokenizeString($name);
+      $query->withNameTokens($tokens);
     }
 
     $icons = $saved->getParameter('icons');

src/applications/project/typeahead/PhabricatorProjectDatasource.php

@@ -18,17 +18,18 @@ final class PhabricatorProjectDatasource
 
     // Allow users to type "#qa" or "qa" to find "Quality Assurance".
     $raw_query = ltrim($raw_query, '#');
+    $tokens = self::tokenizeString($raw_query);
 
-    if (!strlen($raw_query)) {
-      return array();
+    $query = id(new PhabricatorProjectQuery())
+      ->needImages(true)
+      ->needSlugs(true);
+
+    if ($tokens) {
+      $query->withNameTokens($tokens);
     }
 
-    $projs = id(new PhabricatorProjectQuery())
-      ->setViewer($viewer)
-      ->needImages(true)
-      ->needSlugs(true)
-      ->withDatasourceQuery($raw_query)
-      ->execute();
+    $projs = $this->executeQuery($query);
+
     $projs = mpull($projs, null, 'getPHID');
 
     $must_have_cols = $this->getParameter('mustHaveColumns', false);