DX: Add DQL function LEAST and GREATEST

src/Bundle/ChillMainBundle/Doctrine/DQL/Least.php

@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\MainBundle\Doctrine\DQL;
+
+use Doctrine\ORM\Query\AST\Functions\FunctionNode;
+use Doctrine\ORM\Query\AST\Node;
+use Doctrine\ORM\Query\Lexer;
+use Doctrine\ORM\Query\Parser;
+use Doctrine\ORM\Query\SqlWalker;
+
+/**
+ * Postgresql LEAST function.
+ *
+ * Borrowed from https://github.com/beberlei/DoctrineExtensions/blob/master/src/Query/Postgresql/Least.php
+ * (https://github.com/beberlei/DoctrineExtensions/blob/master/LICENSE) and
+ * https://gist.github.com/olimsaidov/4bbd530b1b645ce75e1bbb781b5dd91f
+ */
+class Least extends FunctionNode
+{
+    /**
+     * @var array|Node[]
+     */
+    private array $exprs = [];
+
+    public function getSql(SqlWalker $sqlWalker)
+    {
+        return 'LEAST(' . implode(', ', array_map(static function (Node $expr) use ($sqlWalker) {
+            return $expr->dispatch($sqlWalker);
+        }, $this->exprs)) . ')';
+    }
+
+    public function parse(Parser $parser)
+    {
+        $this->exprs = [];
+
+        $lexer = $parser->getLexer();
+        $parser->match(Lexer::T_IDENTIFIER);
+        $parser->match(Lexer::T_OPEN_PARENTHESIS);
+        $this->exprs[] = $parser->ArithmeticPrimary();
+
+        while (Lexer::T_COMMA === $lexer->lookahead['type']) {
+            $parser->match(Lexer::T_COMMA);
+            $this->exprs[] = $parser->ArithmeticPrimary();
+        }
+
+        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+    }
+}