WEB: Allow listing of screenshots for "other" company id

The "other" company id is an aggregation of all games whose company has
edited one game.

include/Models/ScreenshotsModel.php

@@ -46,11 +46,9 @@ class ScreenshotsModel extends BasicModel
         $data = $this->getFromCache($companyId);
         if (!$data) {
             $screenshots = ScreenshotQuery::create()
-            ->useGameQuery()
                 ->filterByCompanyId($companyId)
-            ->endUse()
-            ->withColumn(self::SUBCATEGORY_COLUMN, 'subcategory')
-            ->find();
+                ->withColumn(self::SUBCATEGORY_COLUMN, 'subcategory')
+                ->find();
 
             if ($screenshots->count() === 0) {
                 throw new \ErrorException(self::INVALID_CATEGORY);

include/OrmObjects/ScreenshotQuery.php

@@ -7,6 +7,7 @@ use Propel\Runtime\Connection\ConnectionInterface;
 use Propel\Runtime\Exception\PropelException;
 use Propel\Runtime\Propel;
 use ScummVM\OrmObjects\Screenshot as ChildScreenshot;
+use ScummVM\OrmObjects\Map\GameTableMap;
 use ScummVM\OrmObjects\Map\ScreenshotTableMap;
 
 /**
@@ -96,4 +97,30 @@ class ScreenshotQuery extends BaseScreenshotQuery
 
         return $obj;
     }
+
+    public function filterByCompanyId($companyId, ConnectionInterface $con = null)
+    {
+        if ($companyId !== 'other') {
+            return $this->useGameQuery()
+                ->filterByCompanyId($companyId)
+                ->endUse();
+        }
+
+        // other company id means all companies with at most 1 game
+        $subquery = ScreenshotQuery::create()->useGameQuery()
+            ->groupByCompanyId()
+            ->endUse()
+            ->withColumn('COUNT(DISTINCT((CASE
+                WHEN ' . GameTableMap::COL_SERIES_ID . ' IS NULL
+                THEN ' . ScreenshotTableMap::COL_ID . '
+                ELSE ' . GameTableMap::COL_SERIES_ID . '
+                END)))', 'cnt')
+            ->having('cnt <= 1')
+            ->withColumn(GameTableMap::COL_COMPANY_ID, 'company_id')
+            ->removeSelfSelectColumns();
+
+        return $this->joinGame()
+            ->addSelectQuery($subquery, 'c', false)
+            ->where(GameTableMap::COL_COMPANY_ID . ' = c.company_id');
+    }
 }