feat: add str_to_datetime function

Author: yuha-yuha

src/Processor/Expression/FunctionEvaluator.php

@@ -114,6 +114,8 @@ public static function evaluate(
                 return self::sqlInetAton($conn, $scope, $expr, $row, $result);
             case 'INET_NTOA':
                 return self::sqlInetNtoa($conn, $scope, $expr, $row, $result);
+            case 'STR_TO_DATE':
+                return self::sqlStrToDate($conn, $scope, $expr, $row, $result);
         }
 
         throw new ProcessorException("Function " . $expr->functionName . " not implemented yet");
@@ -1533,4 +1535,76 @@ private static function getPhpIntervalFromExpression(
                 throw new ProcessorException('MySQL INTERVAL unit ' . $expr->unit . ' not supported yet');
         }
     }
+
+    /**
+     * @param array<string, mixed> $row
+     * @return string|null
+     */
+    private static function sqlStrToDate(
+        FakePdoInterface   $conn,
+        Scope              $scope,
+        FunctionExpression $expr,
+        array              $row,
+        QueryResult        $result
+    ) : ?string {
+        $args = $expr->args;
+
+        if (\count($args) !== 2) {
+            throw new ProcessorException("MySQL DATE_FORMAT() function must be called with one argument");
+        }
+
+        $subject = (string) Evaluator::evaluate($conn, $scope, $args[0], $row, $result);
+        $format = (string) Evaluator::evaluate($conn, $scope, $args[1], $row, $result);
+
+        if (strpos($format, '%') === false) {
+            return null;
+        }
+
+        $date_format_list = [
+            "%b" => "M", "%c" => "n", "%d" => "d", "%D" => "jS", "%e" => "j",
+            "%m" => "m", "%M" => "F", "%y" => "y", "%Y" => "Y"
+        ];
+
+        $time_format_list = [
+            "%h" => "h", "%H" => "H", "%i" => "i", "%I" => "h", "%k" => "G",
+            "%l" => "g", "%r" => "h:i:s A", "%s" => "s", "%S" => "s", "%T" => "H:i:s"
+        ];
+
+        $has_date_format = false;
+        $has_time_format = false;
+        preg_match_all("/(?:%[a-zA-Z])/u", $format, $matches);
+        foreach ($matches[0] as $match) {
+            $has_date_format = $has_date_format || in_array($match, array_keys($date_format_list));
+            $has_time_format = $has_time_format || in_array($match, array_keys($time_format_list));
+        }
+
+
+        $format = \str_replace(
+            array_keys($date_format_list + $time_format_list),
+            array_values($date_format_list + $time_format_list),
+            $format
+        );
+
+        if ($has_date_format && $has_time_format) {
+            $time = \DateTimeImmutable::createFromFormat($format, $subject);
+            if($time !== false) {
+                return $time->format('Y-m-d G:i:s');
+            }
+        }
+
+        if ($has_date_format) {
+            $time = \DateTimeImmutable::createFromFormat($format, $subject);
+            if($time !== false) {
+                return $time->format('Y-m-d');
+            }
+        }
+
+        if ($has_time_format) {
+            $time = \DateTimeImmutable::createFromFormat($format, $subject);
+            if($time !== false) {
+                return $time->format('G:i:s');
+            }
+        }
+        return null;
+    }
 }

tests/EndToEndTest.php

@@ -1242,4 +1242,36 @@ private static function getConnectionToFullDB(bool $emulate_prepares = true, boo
 
         return $pdo;
     }
+
+    public function testStrToDateInSelectFunction()
+    {
+        $pdo = self::getConnectionToFullDB(false);
+        $query = $pdo->prepare("SELECT STR_TO_DATE('01,5,2013', '%d,%m,%Y') AS date");
+
+        $query->execute();
+
+        $d = mktime(0, 0, 0, 5, 1, 2013);
+
+        $current_date = date('Y-m-d', $d);
+
+        $this->assertSame(
+            [[
+                'date' => $current_date,
+            ]],
+            $query->fetchAll(\PDO::FETCH_ASSOC)
+        );
+    }
+
+    public function testStrToDateInWhereFunction()
+    {
+        $pdo = self::getConnectionToFullDB(false);
+        $query = $pdo->prepare("SELECT id FROM `video_game_characters` WHERE `created_on` = (STR_TO_DATE('26/3/2022', '%d/%m/%Y') - INTERVAL 2 MONTH)");
+
+        $query->execute();
+
+        $this->assertSame(
+            [['id' => 16,]],
+            $query->fetchAll(\PDO::FETCH_ASSOC)
+        );
+    }
 }

tests/SelectParseTest.php

@@ -316,4 +316,17 @@ public function testBracketedFirstSelect()
 
         $select_query = \Vimeo\MysqlEngine\Parser\SQLParser::parse($sql);
     }
+
+    public function testStrToDateFunction()
+    {
+        $sql = "SELECT STR_TO_DATE('01,5,2013', '%d,%m,%Y')";
+        $select_query = \Vimeo\MysqlEngine\Parser\SQLParser::parse($sql);
+        $this->assertInstanceOf(SelectQuery::class, $select_query);
+
+        $strToDateFunction = $select_query->selectExpressions[0];
+        $this->assertTrue(isset($strToDateFunction->args[0]));
+        $this->assertTrue(isset($strToDateFunction->args[1]));
+        $this->assertEquals('01,5,2013', $strToDateFunction->args[0]->value);
+        $this->assertEquals('%d,%m,%Y', $strToDateFunction->args[1]->value);
+    }
 }

tests/fixtures/bulk_character_insert.sql

@@ -16,4 +16,4 @@ VALUES
   ('13','pac man', 'Ms Pac Man’s worse three-quarters', 'hero','yellow circle','atari','1','0','{"magic":0, "speed":0, "strength":0, "weapons":0}', NOW()),
   ('14','yoshi', 'Green machine', 'hero','dinosaur','super nintendo','1','0','{"magic":0, "speed":1, "strength":0, "weapons":0}', NOW()),
   ('15','link', 'Zelda? I hardly knew her!', 'hero','not sure','nes','1','0','{"magic":1, "speed":0, "strength":0, "weapons":1}', NOW()),
-  ('16','dude', 'Duuuuuude', 'hero','sure','sega genesis','1','0','{"magic":1, "speed":0, "strength":0, "weapons":1}', NOW())
+  ('16','dude', 'Duuuuuude', 'hero','sure','sega genesis','1','0','{"magic":1, "speed":0, "strength":0, "weapons":1}', '2022-01-26 00:00:00')