Add dql json function

diff --git a/Dql/JsonFunction.php b/Dql/JsonFunction.php
new file mode 100644 (file)
index 0000000..06e314d
--- /dev/null
+++ b/Dql/JsonFunction.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Rapsys\BlogBundle\Dql;
+
+use \Doctrine\ORM\Query\Lexer;
+
+class JsonFunction extends \Doctrine\ORM\Query\AST\Functions\FunctionNode {
+       public $keyExpression = null;
+       public $valueExpression = null;
+
+       public function parse(\Doctrine\ORM\Query\Parser $parser) {
+               $parser->match(Lexer::T_IDENTIFIER);
+               $parser->match(Lexer::T_OPEN_PARENTHESIS);
+               $this->keyExpression = $parser->ArithmeticPrimary();
+
+               if (Lexer::T_COMMA === $parser->getLexer()->lookahead['type']) {
+                       $parser->match(Lexer::T_COMMA);
+                       $this->valueExpression = $parser->ArithmeticPrimary();
+               }
+
+               $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+       }
+
+       public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker) {
+               if (null !== $this->valueExpression) {
+                       return 'CONCAT(\'{\', GROUP_CONCAT(CONCAT(\'"\', REPLACE('.$this->keyExpression->dispatch($sqlWalker).', \'"\', \'\\\\"\'), \'": "\', REPLACE('.$this->valueExpression->dispatch($sqlWalker).', \'"\', \'\\\\"\'), \'"\')), \'}\')';
+               }
+               return 'CONCAT(\'[\', GROUP_CONCAT(REPLACE('.$this->keyExpression->dispatch($sqlWalker).', \'"\', \'\\\\"\')), \']\')';
+       }
+}