Beginning of query parser

classes/query_builder.php

@@ -19,7 +19,7 @@
  * @package Query
  * @subpackage Query
  */
-class BadDBDriverException extends UnexpectedValueException {}
+class BadDBDriverException extends InvalidArgumentException {}
 
 // --------------------------------------------------------------------------
 

classes/query_parser.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Query
+ *
+ * Free Query Builder / Database Abstraction Layer
+ *
+ * @package		Query
+ * @author		Timothy J. Warren
+ * @copyright	Copyright (c) 2012
+ * @link 		https://github.com/aviat4ion/Query
+ * @license		http://philsturgeon.co.uk/code/dbad-license
+ */
+
+// --------------------------------------------------------------------------
+
+/**
+ * Utility Class to parse sql clauses for properly escaping identifiers
+ *
+ * @package Query
+ * @subpackage Query
+ */
+class Query_Parser {
+
+	/**
+	 * Regex patterns for various syntax components
+	 *
+	 * @var array
+	 */
+	private $match_patterns = array(
+		'function' => '`([a-zA-Z0-9_]+\((.*?)\))`',
+		'identifier' => '`([a-zA-Z0-9"_-]+\.?)+`',
+		'operator' => '`=|AND|&&?|~|\|\|?|\^|/|>=?|<=?|-|%|OR|\+|NOT|\!=?|<>|XOR`'
+	);
+
+	/**
+	 * Regex matches
+	 *
+	 * @var array
+	 */
+	public $matches = array(
+		'functions' => array(),
+		'identifiers' => array(),
+		'operators' => array(),
+	);
+
+	/**
+	 * Constructor/entry point into parser
+	 *
+	 * @param string
+	 */
+	public function __construct($sql = '')
+	{
+		preg_match_all($this->match_patterns['function'], $sql, $this->matches['functions'], PREG_SET_ORDER);
+		preg_match_all($this->match_patterns['identifier'], $sql, $this->matches['identifiers'], PREG_SET_ORDER);
+		preg_match_all($this->match_patterns['operator'], $sql, $this->matches['operators'], PREG_SET_ORDER);
+	}
+
+}
+
+// End of query_parser.php

composer.json

@@ -5,15 +5,14 @@
 	"keywords":["database", "query builder"],
 	"homepage":"https://github.com/aviat4ion/Query",
 	"license":"dbad-license",
-	"authors": [
-		{
-			"name": "Timothy J. Warren",
-			"email": "tim@timshomepage.net",
-			"homepage": "https://timshomepage.net",
-			"role": "Developer"
-		}
-	],
+	"authors": [{
+		"name": "Timothy J. Warren",
+		"email": "tim@timshomepage.net",
+		"homepage": "https://timshomepage.net",
+		"role": "Developer"
+	}],
 	"require": {
 		"php": ">=5.2.0"
-	}
+	},
+	
 }

tests/core/db_qp_test.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * Query
+ *
+ * Free Query Builder / Database Abstraction Layer
+ *
+ * @package		Query
+ * @author		Timothy J. Warren
+ * @copyright	Copyright (c) 2012
+ * @link 		https://github.com/aviat4ion/Query
+ * @license		http://philsturgeon.co.uk/code/dbad-license
+ */
+
+// --------------------------------------------------------------------------
+
+class QPTest extends UnitTestCase {
+
+	public function __construct()
+	{
+		$this->parser = new Query_Parser();
+	}
+
+	public function TestGeneric()
+	{
+		$this->parser->__construct('table1.field1=table2.field2');
+
+		//echo '<pre>'.print_r($this->parser->matches, TRUE).'</pre>';
+	}
+
+	public function TestFunction()
+	{
+		$this->parser->__construct('table1.field1 > SUM(3+5)');
+
+		//echo '<pre>'.print_r($this->parser->matches, TRUE).'</pre>';
+	}
+
+}

tests/index.php

@@ -30,6 +30,7 @@ require_once(QBASE_DIR . 'autoload.php');
 // Require base testing classes
 require_once(QTEST_DIR . '/core/core.php');
 require_once(QTEST_DIR . '/core/db_test.php');
+require_once(QTEST_DIR . '/core/db_qp_test.php');
 require_once(QTEST_DIR . '/core/db_qb_test.php');
 
 // Include db tests