From 5109227b2588d3d0e3edbb5687249d4c01f0770a Mon Sep 17 00:00:00 2001
From: Alexey Skobkin <skobkin-ru@ya.ru>
Date: Mon, 21 Oct 2019 00:29:08 +0300
Subject: [PATCH] Using DQL 'ILIKE' implementation instead of 'LIKE' for
 search.

---
 config/packages/doctrine.yaml         |  3 ++
 src/Doctrine/ORM/AST/BaseFunction.php | 73 +++++++++++++++++++++++++++
 src/Doctrine/ORM/AST/Ilike.php        | 25 +++++++++
 src/Search/TorrentSearcher.php        |  2 +-
 4 files changed, 102 insertions(+), 1 deletion(-)
 create mode 100644 src/Doctrine/ORM/AST/BaseFunction.php
 create mode 100644 src/Doctrine/ORM/AST/Ilike.php

diff --git a/config/packages/doctrine.yaml b/config/packages/doctrine.yaml
index d250885..2f4a930 100644
--- a/config/packages/doctrine.yaml
+++ b/config/packages/doctrine.yaml
@@ -41,3 +41,6 @@ doctrine:
                         dir: '%kernel.project_dir%/src/Magnetico/Entity'
                         prefix: 'App\Magnetico'
                         alias: Magnetico
+                dql:
+                    string_functions:
+                        ILIKE: 'App\Doctrine\ORM\AST\Ilike'
diff --git a/src/Doctrine/ORM/AST/BaseFunction.php b/src/Doctrine/ORM/AST/BaseFunction.php
new file mode 100644
index 0000000..722ee13
--- /dev/null
+++ b/src/Doctrine/ORM/AST/BaseFunction.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Doctrine\ORM\AST;
+
+use Doctrine\ORM\Query\{AST\Functions\FunctionNode, AST\Node, Lexer, Parser, SqlWalker};
+
+/**
+ * @since 0.1
+ *
+ * @author Martin Georgiev <martin.georgiev@gmail.com>
+ * @see https://github.com/martin-georgiev/postgresql-for-doctrine
+ */
+abstract class BaseFunction extends FunctionNode
+{
+    /** @var string */
+    protected $functionPrototype;
+
+    /** @var string[] */
+    protected $nodesMapping = [];
+
+    /** @var Node[] */
+    protected $nodes = [];
+
+    abstract protected function customiseFunction(): void;
+
+    protected function setFunctionPrototype(string $functionPrototype): void
+    {
+        $this->functionPrototype = $functionPrototype;
+    }
+
+    protected function addNodeMapping(string $parserMethod): void
+    {
+        $this->nodesMapping[] = $parserMethod;
+    }
+
+    public function parse(Parser $parser): void
+    {
+        $this->customiseFunction();
+
+        $parser->match(Lexer::T_IDENTIFIER);
+        $parser->match(Lexer::T_OPEN_PARENTHESIS);
+        $this->feedParserWithNodes($parser);
+        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+    }
+
+    /**
+     * Feeds given parser with previously set nodes.
+     */
+    protected function feedParserWithNodes(Parser $parser): void
+    {
+        $nodesMappingCount = \count($this->nodesMapping);
+        $lastNode = $nodesMappingCount - 1;
+        for ($i = 0; $i < $nodesMappingCount; $i++) {
+            $parserMethod = $this->nodesMapping[$i];
+            $this->nodes[$i] = $parser->{$parserMethod}();
+            if ($i < $lastNode) {
+                $parser->match(Lexer::T_COMMA);
+            }
+        }
+    }
+
+    public function getSql(SqlWalker $sqlWalker): string
+    {
+        $dispatched = [];
+        foreach ($this->nodes as $node) {
+            $dispatched[] = $node->dispatch($sqlWalker);
+        }
+
+        return \vsprintf($this->functionPrototype, $dispatched);
+    }
+}
\ No newline at end of file
diff --git a/src/Doctrine/ORM/AST/Ilike.php b/src/Doctrine/ORM/AST/Ilike.php
new file mode 100644
index 0000000..b9c374c
--- /dev/null
+++ b/src/Doctrine/ORM/AST/Ilike.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Doctrine\ORM\AST;
+
+/**
+ * Implementation of PostgreSql ILIKE().
+ *
+ * For usage example @see https://github.com/martin-georgiev/postgresql-for-doctrine/blob/master/docs/USE-CASES-AND-EXAMPLES.md
+ *
+ * @see https://www.postgresql.org/docs/9.3/functions-matching.html
+ *
+ * @author llaakkkk <lenakirichokv@gmail.com>
+ * @see https://github.com/martin-georgiev/postgresql-for-doctrine
+ */
+class Ilike extends BaseFunction
+{
+    protected function customiseFunction(): void
+    {
+        $this->setFunctionPrototype('%s ilike %s');
+        $this->addNodeMapping('StringPrimary');
+        $this->addNodeMapping('StringPrimary');
+    }
+}
diff --git a/src/Search/TorrentSearcher.php b/src/Search/TorrentSearcher.php
index 09fe611..f506774 100644
--- a/src/Search/TorrentSearcher.php
+++ b/src/Search/TorrentSearcher.php
@@ -39,7 +39,7 @@ class TorrentSearcher
         $where = $qb->expr()->andX();
 
         foreach ($this->splitQueryToParts($query) as $idx => $part) {
-            $where->add($qb->expr()->like('LOWER(t.name)', ':part_'.$idx));
+            $where->add('ILIKE(t.name , :part_'.$idx.') = TRUE');
             $qb->setParameter('part_'.$idx, '%'.strtolower($part).'%');
         }