XPathConvertor::bool() - Code Metrics - Inspection of "WiP" - s9e/TextFormatter - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — XPathConvertorRefactor (0e46c7)

by Josh

created 2018-07-02 20:48 UTC

XPathConvertor::bool() A

↳ Parent: Project

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	9
rs	9.9666
c	0
b	0
f	0
cc	1
nc	1
nop	3

<?php

/**
* @package   s9e\TextFormatter
* @copyright Copyright (c) 2010-2018 The s9e Authors
* @license   http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Configurator\RendererGenerators\PHP;

use RuntimeException;
use s9e\TextFormatter\Configurator\RendererGenerators\PHP\XPathConvertor\Runner;

class XPathConvertor
{
	/**
	* @var Runner
	*/
	protected $runner;

	/**
	* Constructor
	*/
	public function __construct(Runner $runner = null)
	{
		$this->runner = $runner ?: new Runner;
	}

	/**
	* Convert an XPath expression (used in a condition) into PHP code
	*
	* This method is similar to convertXPath() but it selectively replaces some simple conditions
	* with the corresponding DOM method for performance reasons
	*
	* @param  string $expr XPath expression
	* @return string       PHP code
	*/
	public function convertCondition($expr)
	{
		// Replace @attr with boolean(@attr) in boolean expressions
		$expr = preg_replace(
			'((^|\\(\\s*|\\b(?:and|or)\\s*)([\\(\\s]*)([$@][-\\w]+|@\\*)([\\)\\s]*)(?=$|\\s+(?:and|or)))',
			'$1$2boolean($3)$4',
			trim($expr)
		);

		// Replace not(boolean(@attr)) with not(@attr)
		$expr = preg_replace(
			'(not\\(boolean\\(([$@][-\\w]+)\\)\\))',
			'not($1)',
			$expr
		);

		try
		{
			return $this->runner->convert($expr);
		}
		catch (RuntimeException $e)
		{
			// Do nothing
		}

		// If the condition does not seem to contain a relational expression, or start with a
		// function call, we wrap it inside of a boolean() call
		if (!preg_match('([=<>]|\\bor\\b|\\band\\b|^[-\\w]+\\s*\\()', $expr))
		{
			$expr = 'boolean(' . $expr . ')';
		}

		return '$this->xpath->evaluate(' . $this->exportXPath($expr) . ',$node)';
	}

	/**
	* Convert an XPath expression (used as value) into PHP code
	*
	* @param  string $expr XPath expression
	* @return string       PHP code
	*/
	public function convertXPath($expr)
	{
		$expr = trim($expr);
		try
		{
			return $this->runner->convert($expr);
		}
		catch (RuntimeException $e)
		{
			// Do nothing
		}

		// Make sure the expression evaluates as a string
		if (!preg_match('(^[-\\w]*s(?:pace|tring)[-\\w]*\\()', $expr))
		{
			$expr = 'string(' . $expr . ')';
		}
		$expr = $this->exportXPath($expr);

		return '$this->xpath->evaluate(' . $expr . ',$node)';
	}

	/**
	* Export an XPath expression as PHP with special consideration for XPath variables
	*
	* Will return PHP source representing the XPath expression, with special consideration for XPath
	* variables which are returned as a method call to XPath::export()
	*
	* @param  string $expr XPath expression
	* @return string       PHP representation of the expression
	*/
	protected function exportXPath($expr)
	{
		$phpTokens = [];
		foreach ($this->tokenizeXPathForExport($expr) as list($type, $content))
		{
			$methodName  = 'exportXPath' . ucfirst($type);
			$phpTokens[] = $this->$methodName($content);
		}

		return implode('.', $phpTokens);
	}

	/**
	* Convert a "current()" XPath expression to its PHP source representation
	*
	* @return string
	*/
	protected function exportXPathCurrent()
	{
		return '$node->getNodePath()';
	}

	/**
	* Convert a fragment of an XPath expression to its PHP source representation
	*
	* @param  string $fragment
	* @return string
	*/
	protected function exportXPathFragment($fragment)
	{
		return var_export($fragment, true);
	}

	/**
	* Convert an XSLT parameter to its PHP source representation
	*
	* @param  string $param Parameter, including the leading $
	* @return string
	*/
	protected function exportXPathParam($param)
	{
		$paramName = ltrim($param, '$');

		return '$this->getParamAsXPath(' . var_export($paramName, true) . ')';
	}

	/**
	* Match the relevant components of an XPath expression
	*
	* @param  string $expr XPath expression
	* @return array
	*/
	protected function matchXPathForExport($expr)
	{
		$tokenExprs = [
			'(?<current>\\bcurrent\\(\\))',
			'(?<param>\\$\\w+)',
			'(?<fragment>"[^"]*"|\'[^\']*\'|.)'
		];
		preg_match_all('(' . implode('|', $tokenExprs) . ')s', $expr, $matches, PREG_SET_ORDER);

		// Merge fragment tokens
		$i = count($matches);
		while (--$i > 0)
		{
			if (isset($matches[$i]['fragment'], $matches[$i - 1]['fragment']))
			{
				$matches[$i - 1]['fragment'] .= $matches[$i]['fragment'];
				unset($matches[$i]);
			}
		}

		return array_values($matches);
	}

	/**
	* Tokenize an XPath expression for use in PHP
	*
	* @param  string $expr XPath expression
	* @return array
	*/
	protected function tokenizeXPathForExport($expr)
	{
		$tokens = [];
		foreach ($this->matchXPathForExport($expr) as $match)
		{
			foreach (array_reverse($match) as $k => $v)
			{
				// Use the last non-numeric match
				if (!is_numeric($k))
				{
					$tokens[] = [$k, $v];
					break;
				}
			}
		}

		return $tokens;
	}
}

1			<?php
2
3			/**
4			* @package s9e\TextFormatter
5			* @copyright Copyright (c) 2010-2018 The s9e Authors
6			* @license http://www.opensource.org/licenses/mit-license.php The MIT License
7			*/
8			namespace s9e\TextFormatter\Configurator\RendererGenerators\PHP;
9
10			use RuntimeException;
11			use s9e\TextFormatter\Configurator\RendererGenerators\PHP\XPathConvertor\Runner;
12
13			class XPathConvertor
14			{
15			/**
16			* @var Runner
17			*/
18			protected $runner;
19
20			/**
21			* Constructor
22			*/
23			public function __construct(Runner $runner = null)
24			{
25			$this->runner = $runner ?: new Runner;
26			}
27
28			/**
29			* Convert an XPath expression (used in a condition) into PHP code
30			*
31			* This method is similar to convertXPath() but it selectively replaces some simple conditions
32			* with the corresponding DOM method for performance reasons
33			*
34			* @param string $expr XPath expression
35			* @return string PHP code
36			*/
37			public function convertCondition($expr)
38			{
39			// Replace @attr with boolean(@attr) in boolean expressions
40			$expr = preg_replace(
41			'((^\|\\(\\s\|\\b(?:and\|or)\\s)([\\(\\s])([$@][-\\w]+\|@\\)([\\)\\s]*)(?=$\|\\s+(?:and\|or)))',
42			'$1$2boolean($3)$4',
43			trim($expr)
44			);
45
46			// Replace not(boolean(@attr)) with not(@attr)
47			$expr = preg_replace(
48			'(not\\(boolean\\(([$@][-\\w]+)\\)\\))',
49			'not($1)',
50			$expr
51			);
52
53			try
54			{
55			return $this->runner->convert($expr);
56			}
57			catch (RuntimeException $e)
58			{
59			// Do nothing
60			}
61
62			// If the condition does not seem to contain a relational expression, or start with a
63			// function call, we wrap it inside of a boolean() call
64			if (!preg_match('([=<>]\|\\bor\\b\|\\band\\b\|^[-\\w]+\\s*\\()', $expr))
65			{
66			$expr = 'boolean(' . $expr . ')';
67			}
68
69			return '$this->xpath->evaluate(' . $this->exportXPath($expr) . ',$node)';
70			}
71
72			/**
73			* Convert an XPath expression (used as value) into PHP code
74			*
75			* @param string $expr XPath expression
76			* @return string PHP code
77			*/
78			public function convertXPath($expr)
79			{
80			$expr = trim($expr);
81			try
82			{
83			return $this->runner->convert($expr);
84			}
85			catch (RuntimeException $e)
86			{
87			// Do nothing
88			}
89
90			// Make sure the expression evaluates as a string
91			if (!preg_match('(^[-\\w]s(?:pace\|tring)[-\\w]\\()', $expr))
92			{
93			$expr = 'string(' . $expr . ')';
94			}
95			$expr = $this->exportXPath($expr);
96
97			return '$this->xpath->evaluate(' . $expr . ',$node)';
98			}
99
100			/**
101			* Export an XPath expression as PHP with special consideration for XPath variables
102			*
103			* Will return PHP source representing the XPath expression, with special consideration for XPath
104			* variables which are returned as a method call to XPath::export()
105			*
106			* @param string $expr XPath expression
107			* @return string PHP representation of the expression
108			*/
109			protected function exportXPath($expr)
110			{
111			$phpTokens = [];
112			foreach ($this->tokenizeXPathForExport($expr) as list($type, $content))
113			{
114			$methodName = 'exportXPath' . ucfirst($type);
115			$phpTokens[] = $this->$methodName($content);
116			}
117
118			return implode('.', $phpTokens);
119			}
120
121			/**
122			* Convert a "current()" XPath expression to its PHP source representation
123			*
124			* @return string
125			*/
126			protected function exportXPathCurrent()
127			{
128			return '$node->getNodePath()';
129			}
130
131			/**
132			* Convert a fragment of an XPath expression to its PHP source representation
133			*
134			* @param string $fragment
135			* @return string
136			*/
137			protected function exportXPathFragment($fragment)
138			{
139			return var_export($fragment, true);
140			}
141
142			/**
143			* Convert an XSLT parameter to its PHP source representation
144			*
145			* @param string $param Parameter, including the leading $
146			* @return string
147			*/
148			protected function exportXPathParam($param)
149			{
150			$paramName = ltrim($param, '$');
151
152			return '$this->getParamAsXPath(' . var_export($paramName, true) . ')';
153			}
154
155			/**
156			* Match the relevant components of an XPath expression
157			*
158			* @param string $expr XPath expression
159			* @return array
160			*/
161			protected function matchXPathForExport($expr)
162			{
163			$tokenExprs = [
164			'(?<current>\\bcurrent\\(\\))',
165			'(?<param>\\$\\w+)',
166			'(?<fragment>"[^"]"\|\'[^\']\'\|.)'
167			];
168			preg_match_all('(' . implode('\|', $tokenExprs) . ')s', $expr, $matches, PREG_SET_ORDER);
169
170			// Merge fragment tokens
171			$i = count($matches);
172			while (--$i > 0)
173			{
174			if (isset($matches[$i]['fragment'], $matches[$i - 1]['fragment']))
175			{
176			$matches[$i - 1]['fragment'] .= $matches[$i]['fragment'];
177			unset($matches[$i]);
178			}
179			}
180
181			return array_values($matches);
182			}
183
184			/**
185			* Tokenize an XPath expression for use in PHP
186			*
187			* @param string $expr XPath expression
188			* @return array
189			*/
190			protected function tokenizeXPathForExport($expr)
191			{
192			$tokens = [];
193			foreach ($this->matchXPathForExport($expr) as $match)
194			{
195			foreach (array_reverse($match) as $k => $v)
196			{
197			// Use the last non-numeric match
198			if (!is_numeric($k))
199			{
200			$tokens[] = [$k, $v];
201			break;
202			}
203			}
204			}
205
206			return $tokens;
207			}
208			}

s9e / TextFormatter

Branch — XPathConvertorRefactor (0e46c7)

XPathConvertor::bool() A

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