add SqlServer parser

Author: hrach

src/SqlServerMultiQueryParser.php

@@ -0,0 +1,90 @@
+<?php declare(strict_types = 1);
+
+namespace Nextras\MultiQueryParser;
+
+use Iterator;
+use Nextras\MultiQueryParser\Exception\RuntimeException;
+use function file_get_contents;
+use function preg_match;
+use function strlen;
+
+
+class SqlServerMultiQueryParser implements IMultiQueryParser
+{
+	public function parseFile(string $path): Iterator
+	{
+		$content = @file_get_contents($path);
+		if ($content === false) {
+			throw new RuntimeException("Cannot open file '$path'.");
+		}
+
+		$offset = 0;
+		$pattern = $this->getQueryPattern();
+		var_dump($pattern);
+
+		while (preg_match($pattern, $content, $match, 0, $offset)) {
+			$offset += strlen($match[0]);
+
+			if (isset($match['query']) && $match['query'] !== '') {
+				yield $match['query'];
+			} else {
+				break;
+			}
+		}
+
+		if ($offset !== strlen($content)) {
+			throw new RuntimeException("Failed to parse file '$path', please report an issue.");
+		}
+	}
+
+
+	private function getQueryPattern(): string
+	{
+		$simpleQuery = /** @lang PhpRegExp */ '~
+			(?:
+					\\s
+				|   /\\* (?: [^*]++   | \\*(?!/) )*+ \\*/
+				|   -- [^\\n]*+
+			)*+
+			(?<simplequery>
+				(?:
+						[^;\'"[/-]++
+					|   \'                                                  (?: [^\']                     )*+ \'
+					|   "                                                   (?: [^"]                      )*+ "
+					|   /\\*                                                (?: [^*]++   | \\*(?!/)       )*+ \\*/
+					|   -- [^\\n]*+
+					|   (?!;) .
+				)++
+			)
+			;
+		~x';
+		return /** @lang PhpRegExp */ '~
+			(?:
+					\\s
+				|   /\\* (?: [^*]++   | \\*(?!/) )*+ \\*/
+				|   -- [^\\n]*+
+			)*+
+
+			(?:
+				(?:
+					(?<query>
+						(?:
+							 	[^B;\'"[/-]++
+							|   \'                                                  (?: [^\']                     )*+ \'
+							|   "                                                   (?: [^"]                      )*+ "
+							|   /\\*                                                (?: [^*]++   | \\*(?!/)       )*+ \\*/
+							|   BEGIN (?: \s*END\s*| ' . substr($simpleQuery, 1, -2) . ')*
+							|   -- [^\\n]*+
+							|   (?!;) .
+						)++
+					)
+					(?: ; | \\z )
+				)
+				|
+				(?:
+					\\z
+				)
+			)
+		~xsAS';
+	}
+}

tests/cases/SqlServerMultiQueryParserTest.phpt

@@ -0,0 +1,51 @@
+<?php declare(strict_types = 1);
+
+/**
+ * @testCase
+ */
+
+namespace Nextras\MultiQueryParser;
+
+use Tester\Assert;
+use Tester\TestCase;
+
+
+require_once __DIR__ . '/../bootstrap.php';
+
+
+class SqlServerMultiQueryParserTest extends TestCase
+{
+	public function testFile()
+	{
+		$parser = new SqlServerMultiQueryParser();
+		$queries = iterator_to_array($parser->parseFile(__DIR__ . '/data/sqlserver.sql'));
+		Assert::count(69, $queries);
+		Assert::same(<<<SQL
+		CREATE TRIGGER mydatabase.trigger_book_stats
+			ON yourtable.books
+			AFTER INSERT, DELETE
+			AS
+		BEGIN
+			SET NOCOUNT ON;
+			INSERT INTO yourtable.book_stats(
+				book_id,
+				string_value
+			)
+			SELECT
+				i.book_id,
+				'INS'
+			FROM
+				inserted i
+			UNION ALL
+			SELECT
+				d.book_id,
+				'DEL'
+			FROM
+				deleted d;
+		END
+		SQL, $queries[67]);
+	}
+}
+
+
+(new SqlServerMultiQueryParserTest())->run();