Helpers for group by and select

Author: bajb

src/Builder/Traits/GroupByTrait.php

@@ -11,28 +11,7 @@ public function groupBy($fields)
     /**
      * @var $this IStatement
      */
-
-    $groupClause = new GroupByClause();
-    if(func_num_args() > 1)
-    {
-      foreach(func_get_args() as $field)
-      {
-        $groupClause->addField($field);
-      }
-    }
-    else if(is_array($fields))
-    {
-      foreach($fields as $field)
-      {
-        $groupClause->addField($field);
-      }
-    }
-    else
-    {
-      $groupClause->addField($fields);
-    }
-
-    $this->addClause($groupClause);
+    $this->addClause(GroupByClause::create(...func_get_args()));
     return $this;
   }
 }

src/Clause/GroupByClause.php

@@ -10,4 +10,28 @@ public function getAction()
   {
     return 'GROUP BY';
   }
+
+  public static function create($fields)
+  {
+    $groupClause = new static();
+    if(func_num_args() > 1)
+    {
+      foreach(func_get_args() as $field)
+      {
+        $groupClause->addField($field);
+      }
+    }
+    else if(is_array($fields))
+    {
+      foreach($fields as $field)
+      {
+        $groupClause->addField($field);
+      }
+    }
+    else
+    {
+      $groupClause->addField($fields);
+    }
+    return $groupClause;
+  }
 }

src/Clause/SelectClause.php

@@ -12,6 +12,16 @@ class SelectClause implements IClause
   protected $_expressions = [];
   protected $_distinct = false;
 
+  public static function create(...$fields)
+  {
+    $select = new static();
+    foreach($fields as $field)
+    {
+      $select->addField($field);
+    }
+    return $select;
+  }
+
   public function setDistinct($distinct = true)
   {
     $this->_distinct = $distinct;

tests/Clause/SelectClauseTest.php

@@ -96,4 +96,13 @@ public function testGettersAndSetters()
     $this->setExpectedException("InvalidArgumentException");
     $clause->setExpressions([$field, $now, 'abc']);
   }
+
+  public function testStatic()
+  {
+    $clause = SelectClause::create('first');
+    $clause->setDistinct(true);
+    $this->assertEquals('SELECT DISTINCT first', QueryAssembler::stringify($clause));
+
+    $this->assertEquals('SELECT *', QueryAssembler::stringify(SelectClause::create()));
+  }
 }