Parser::parseBBCode() - Code Metrics - Inspection of "BBCodes: removed $predefinedAttributes" - s9e/TextFormatter - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( bcddd9...147c77 )

by Josh

created 2017-12-26 16:31 UTC

Parser::parseBBCode() C

↳ Parent: Parser

Complexity

Conditions	16
Paths	84

Size

Total Lines	76
Code Lines	30

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	30
CRAP Score	16

Importance

Changes

Metric	Value
dl	0
loc	76
ccs	30
cts	30
cp	1
rs	5.248
c	0
b	0
f	0
cc	16
eloc	30
nc	84
nop	0
crap	16

How to fix Long Method Complexity

<?php

/**
* @package   s9e\TextFormatter
* @copyright Copyright (c) 2010-2017 The s9e Authors
* @license   http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Plugins\BBCodes;

use RuntimeException;
use s9e\TextFormatter\Parser\Tag;
use s9e\TextFormatter\Plugins\ParserBase;

class Parser extends ParserBase
{
	/**
	* @var array Attributes of the BBCode being parsed
	*/
	protected $attributes;

	/**
	* @var array Configuration for the BBCode being parsed
	*/
	protected $bbcodeConfig;

	/**
	* @var string Name of the BBCode being parsed
	*/
	protected $bbcodeName;

	/**
	* @var string Suffix of the BBCode being parsed, including its colon
	*/
	protected $bbcodeSuffix;

	/**
	* @var integer Position of the cursor in the original text
	*/
	protected $pos;

	/**
	* @var integer Position of the start of the BBCode being parsed
	*/
	protected $startPos;

	/**
	* @var string Text being parsed
	*/
	protected $text;

	/**
	* @var integer Length of the text being parsed
	*/
	protected $textLen;

	/**
	* @var string Text being parsed, normalized to uppercase
	*/
	protected $uppercaseText;

	/**
	* {@inheritdoc}
	*/
	public function parse($text, array $matches)
	{
		$this->text          = $text;
		$this->textLen       = strlen($text);
		$this->uppercaseText = '';
		foreach ($matches as $m)
		{
			$this->bbcodeName = strtoupper($m[1][0]);
			if (!isset($this->config['bbcodes'][$this->bbcodeName]))
			{
				continue;
			}
			$this->bbcodeConfig = $this->config['bbcodes'][$this->bbcodeName];
			$this->startPos     = $m[0][1];
			$this->pos          = $this->startPos + strlen($m[0][0]);

			try
			{
				$this->parseBBCode();
			}
			catch (RuntimeException $e)
			{
				// Do nothing
			}
		}
	}

	/**
	* Add the end tag that matches current BBCode
	*
	* @return Tag
	*/
	protected function addBBCodeEndTag()
	{
		return $this->parser->addEndTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
	}

	/**
	* Add the self-closing tag that matches current BBCode
	*
	* @return Tag
	*/
	protected function addBBCodeSelfClosingTag()
	{
		$tag = $this->parser->addSelfClosingTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
		$tag->setAttributes($this->attributes);

		return $tag;
	}

	/**
	* Add the start tag that matches current BBCode
	*
	* @return Tag
	*/
	protected function addBBCodeStartTag()
	{
		$tag = $this->parser->addStartTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
		$tag->setAttributes($this->attributes);

		return $tag;
	}

	/**
	* Parse the end tag that matches given BBCode name and suffix starting at current position
	*
	* @return Tag|null
	*/
	protected function captureEndTag()
	{
		if (empty($this->uppercaseText))
		{
			$this->uppercaseText = strtoupper($this->text);
		}
		$match     = '[/' . $this->bbcodeName . $this->bbcodeSuffix . ']';
		$endTagPos = strpos($this->uppercaseText, $match, $this->pos);
		if ($endTagPos === false)
		{
			return;
		}

		return $this->parser->addEndTag($this->getTagName(), $endTagPos, strlen($match));
	}

	/**
	* Get the tag name for current BBCode
	*
	* @return string
	*/
	protected function getTagName()
	{
		// Use the configured tagName if available, or reuse the BBCode's name otherwise
		return (isset($this->bbcodeConfig['tagName']))
		     ? $this->bbcodeConfig['tagName']
		     : $this->bbcodeName;
	}

	/**
	* Parse attributes starting at current position
	*
	* @return array Associative array of [name => value]
	*/
	protected function parseAttributes()
	{
		$firstPos = $this->pos;
		$this->attributes = [];
		while ($this->pos < $this->textLen)
		{
			$c = $this->text[$this->pos];
			if (strpos(" \n\t", $c) !== false)
			{
				++$this->pos;
				continue;
			}
			if (strpos('/]', $c) !== false)
			{
				return;
			}

			// Capture the attribute name
			$spn = strspn($this->text, 'abcdefghijklmnopqrstuvwxyz_0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-', $this->pos);
			if ($spn)
			{
				$attrName = strtolower(substr($this->text, $this->pos, $spn));
				$this->pos += $spn;
				if ($this->pos >= $this->textLen)
				{
					// The attribute name extends to the end of the text
					throw new RuntimeException;
				}
				if ($this->text[$this->pos] !== '=')
				{
					// It's an attribute name not followed by an equal sign, ignore it
					continue;
				}
			}
			elseif ($c === '=' && $this->pos === $firstPos)
			{
				// This is the default param, e.g. [quote=foo]
				$attrName = (isset($this->bbcodeConfig['defaultAttribute']))
				          ? $this->bbcodeConfig['defaultAttribute']
				          : strtolower($this->bbcodeName);
			}
			else
			{
				throw new RuntimeException;
			}

			// Move past the = and make sure we're not at the end of the text
			if (++$this->pos >= $this->textLen)
			{
				throw new RuntimeException;
			}

			$this->attributes[$attrName] = $this->parseAttributeValue();
		}
	}

	/**
	* Parse the attribute value starting at current position
	*
	* @return string
	*/
	protected function parseAttributeValue()
	{
		// Test whether the value is in quotes
		if ($this->text[$this->pos] === '"' || $this->text[$this->pos] === "'")
		{
			return $this->parseQuotedAttributeValue();
		}

		// Capture everything up to whichever comes first:
		//  - an endline
		//  - whitespace followed by a slash and a closing bracket
		//  - a closing bracket, optionally preceded by whitespace
		//  - whitespace followed by another attribute (name followed by equal sign)
		//
		// NOTE: this is for compatibility with some forums (such as vBulletin it seems)
		//       that do not put attribute values in quotes, e.g.
		//       [quote=John Smith;123456] (quoting "John Smith" from post #123456)
		if (!preg_match('#[^\\]\\n]*?(?=\\s*(?:\\s/)?\\]|\\s+[-\\w]+=)#', $this->text, $m, null, $this->pos))
		{
			throw new RuntimeException;
		}

		$attrValue  = $m[0];
		$this->pos += strlen($attrValue);

		return $attrValue;
	}

	/**
	* Parse current BBCode
	*
	* @return void
	*/
	protected function parseBBCode()
	{
		$this->parseBBCodeSuffix();

		// Test whether this is an end tag
		if ($this->text[$this->startPos + 1] === '/')
		{
			// Test whether the tag is properly closed and whether this tag has an identifier.
			// We skip end tags that carry an identifier because they're automatically added
			// when their start tag is processed
			if (substr($this->text, $this->pos, 1) === ']' && $this->bbcodeSuffix === '')
			{
				++$this->pos;
				$this->addBBCodeEndTag();
			}

			return;
		}

		// Parse attributes
		$this->parseAttributes();

		// Test whether the tag is properly closed
		if (substr($this->text, $this->pos, 1) === ']')
		{
			++$this->pos;
		}
		else
		{
			// Test whether this is a self-closing tag
			if (substr($this->text, $this->pos, 2) === '/]')
			{
				$this->pos += 2;
				$this->addBBCodeSelfClosingTag();
			}

			return;
		}

		// Record the names of attributes that need the content of this tag
		$contentAttributes = [];
		if (isset($this->bbcodeConfig['contentAttributes']))
		{
			foreach ($this->bbcodeConfig['contentAttributes'] as $attrName)
			{
				if (!isset($this->attributes[$attrName]))
				{
					$contentAttributes[] = $attrName;
				}
			}
		}

		// Look ahead and parse the end tag that matches this tag, if applicable
		$requireEndTag = ($this->bbcodeSuffix || !empty($this->bbcodeConfig['forceLookahead']));
		$endTag = ($requireEndTag || !empty($contentAttributes)) ? $this->captureEndTag() : null;
		if (isset($endTag))
		{
			foreach ($contentAttributes as $attrName)
			{
				$this->attributes[$attrName] = substr($this->text, $this->pos, $endTag->getPos() - $this->pos);
			}
		}
		elseif ($requireEndTag)
		{
			return;
		}

		// Create this start tag
		$tag = $this->addBBCodeStartTag();

		// If an end tag was created, pair it with this start tag
		if (isset($endTag))
		{
			$tag->pairWith($endTag);
		}
	}

	/**
	* Parse the BBCode suffix starting at current position
	*
	* Used to explicitly pair specific tags together, e.g.
	*   [code:123][code]type your code here[/code][/code:123]
	*
	* @return void
	*/
	protected function parseBBCodeSuffix()
	{
		$this->bbcodeSuffix = '';
		if ($this->text[$this->pos] === ':')
		{
			// Capture the colon and the (0 or more) digits following it
			$spn = 1 + strspn($this->text, '0123456789', 1 + $this->pos);
			$this->bbcodeSuffix = substr($this->text, $this->pos, $spn);

			// Move past the suffix
			$this->pos += $spn;
		}
	}

	/**
	* Parse a quoted attribute value that starts at current offset
	*
	* @return string
	*/
	protected function parseQuotedAttributeValue()
	{
		$quote    = $this->text[$this->pos];
		$valuePos = $this->pos + 1;
		while (1)
		{
			// Look for the next quote
			$this->pos = strpos($this->text, $quote, $this->pos + 1);
			if ($this->pos === false)
			{
				// No matching quote. Apparently that string never ends...
				throw new RuntimeException;
			}

			// Test for an odd number of backslashes before this character
			$n = 0;
			do
			{
				++$n;
			}
			while ($this->text[$this->pos - $n] === '\\');

			if ($n % 2)
			{
				// If $n is odd, it means there's an even number of backslashes. We can exit this
				// loop
				break;
			}
		}

		// Unescape special characters ' " and \
		$attrValue = preg_replace(
			'#\\\\([\\\\\'"])#',
			'$1',
			substr($this->text, $valuePos, $this->pos - $valuePos)
		);

		// Skip past the closing quote
		++$this->pos;

		return $attrValue;
	}
}

1		<?php
2
3		/**
4		* @package s9e\TextFormatter
5		* @copyright Copyright (c) 2010-2017 The s9e Authors
6		* @license http://www.opensource.org/licenses/mit-license.php The MIT License
7		*/
8		namespace s9e\TextFormatter\Plugins\BBCodes;
9
10		use RuntimeException;
11		use s9e\TextFormatter\Parser\Tag;
12		use s9e\TextFormatter\Plugins\ParserBase;
13
14		class Parser extends ParserBase
15		{
16		/**
17		* @var array Attributes of the BBCode being parsed
18		*/
19		protected $attributes;
20
21		/**
22		* @var array Configuration for the BBCode being parsed
23		*/
24		protected $bbcodeConfig;
25
26		/**
27		* @var string Name of the BBCode being parsed
28		*/
29		protected $bbcodeName;
30
31		/**
32		* @var string Suffix of the BBCode being parsed, including its colon
33		*/
34		protected $bbcodeSuffix;
35
36		/**
37		* @var integer Position of the cursor in the original text
38		*/
39		protected $pos;
40
41		/**
42		* @var integer Position of the start of the BBCode being parsed
43		*/
44		protected $startPos;
45
46		/**
47		* @var string Text being parsed
48		*/
49		protected $text;
50
51		/**
52		* @var integer Length of the text being parsed
53		*/
54		protected $textLen;
55
56		/**
57		* @var string Text being parsed, normalized to uppercase
58		*/
59		protected $uppercaseText;
60
61		/**
62		* {@inheritdoc}
63		*/
64	50	public function parse($text, array $matches)
65		{
66	50	$this->text = $text;
67	50	$this->textLen = strlen($text);
68	50	$this->uppercaseText = '';
69	50	foreach ($matches as $m)
70		{
71	50	$this->bbcodeName = strtoupper($m[1][0]);
72	50	if (!isset($this->config['bbcodes'][$this->bbcodeName]))
73		{
74	3	continue;
75		}
76	50	$this->bbcodeConfig = $this->config['bbcodes'][$this->bbcodeName];
77	50	$this->startPos = $m[0][1];
78	50	$this->pos = $this->startPos + strlen($m[0][0]);
79
80		try
81		{
82	50	$this->parseBBCode();
83		}
84	7	catch (RuntimeException $e)
85	50	{
86		// Do nothing
87		}
88		}
89	50	}
90
91		/**
92		* Add the end tag that matches current BBCode
93		*
94		* @return Tag
95		*/
96	22	protected function addBBCodeEndTag()
97		{
98	22	return $this->parser->addEndTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
99		}
100
101		/**
102		* Add the self-closing tag that matches current BBCode
103		*
104		* @return Tag
105		*/
106	13	protected function addBBCodeSelfClosingTag()
107		{
108	13	$tag = $this->parser->addSelfClosingTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
109	13	$tag->setAttributes($this->attributes);
110
111	13	return $tag;
112		}
113
114		/**
115		* Add the start tag that matches current BBCode
116		*
117		* @return Tag
118		*/
119	23	protected function addBBCodeStartTag()
120		{
121	23	$tag = $this->parser->addStartTag($this->getTagName(), $this->startPos, $this->pos - $this->startPos);
122	23	$tag->setAttributes($this->attributes);
123
124	23	return $tag;
125		}
126
127		/**
128		* Parse the end tag that matches given BBCode name and suffix starting at current position
129		*
130		* @return Tag\|null
131		*/
132	11	protected function captureEndTag()
133		{
134	11	if (empty($this->uppercaseText))
135		{
136	11	$this->uppercaseText = strtoupper($this->text);
137		}
138	11	$match = '[/' . $this->bbcodeName . $this->bbcodeSuffix . ']';
139	11	$endTagPos = strpos($this->uppercaseText, $match, $this->pos);
140	11	if ($endTagPos === false)
141		{
142	5	return;
143		}
144
145	7	return $this->parser->addEndTag($this->getTagName(), $endTagPos, strlen($match));
146		}
147
148		/**
149		* Get the tag name for current BBCode
150		*
151		* @return string
152		*/
153	37	protected function getTagName()
154		{
155		// Use the configured tagName if available, or reuse the BBCode's name otherwise
156	37	return (isset($this->bbcodeConfig['tagName']))
157	1	? $this->bbcodeConfig['tagName']
158	37	: $this->bbcodeName;
159		}
160
161		/**
162		* Parse attributes starting at current position
163		*
164		* @return array Associative array of [name => value]
165		*/
166	49	protected function parseAttributes()
167		{
168	49	$firstPos = $this->pos;
169	49	$this->attributes = [];
170	49	while ($this->pos < $this->textLen)
171		{
172	49	$c = $this->text[$this->pos];
173	49	if (strpos(" \n\t", $c) !== false)
174		{
175	26	++$this->pos;
176	26	continue;
177		}
178	48	if (strpos('/]', $c) !== false)
179		{
180	41	return;
181		}
182
183		// Capture the attribute name
184	28	$spn = strspn($this->text, 'abcdefghijklmnopqrstuvwxyz_0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-', $this->pos);
185	28	if ($spn)
186		{
187	20	$attrName = strtolower(substr($this->text, $this->pos, $spn));
188	20	$this->pos += $spn;
189	20	if ($this->pos >= $this->textLen)
190		{
191		// The attribute name extends to the end of the text
192	1	throw new RuntimeException;
193		}
194	19	if ($this->text[$this->pos] !== '=')
195		{
196		// It's an attribute name not followed by an equal sign, ignore it
197	19	continue;
198		}
199		}
200	9	elseif ($c === '=' && $this->pos === $firstPos)
201		{
202		// This is the default param, e.g. [quote=foo]
203	8	$attrName = (isset($this->bbcodeConfig['defaultAttribute']))
204	2	? $this->bbcodeConfig['defaultAttribute']
205	8	: strtolower($this->bbcodeName);
206		}
207		else
208		{
209	1	throw new RuntimeException;
210		}
211
212		// Move past the = and make sure we're not at the end of the text
213	25	if (++$this->pos >= $this->textLen)
214		{
215	1	throw new RuntimeException;
216		}
217
218	24	$this->attributes[$attrName] = $this->parseAttributeValue();
219		}
220	1	}
221
222		/**
223		* Parse the attribute value starting at current position
224		*
225		* @return string
226		*/
227	24	protected function parseAttributeValue()
228		{
229		// Test whether the value is in quotes
230	24	if ($this->text[$this->pos] === '"' \|\| $this->text[$this->pos] === "'")
231		{
232	14	return $this->parseQuotedAttributeValue();
233		}
234
235		// Capture everything up to whichever comes first:
236		// - an endline
237		// - whitespace followed by a slash and a closing bracket
238		// - a closing bracket, optionally preceded by whitespace
239		// - whitespace followed by another attribute (name followed by equal sign)
240		//
241		// NOTE: this is for compatibility with some forums (such as vBulletin it seems)
242		// that do not put attribute values in quotes, e.g.
243		// [quote=John Smith;123456] (quoting "John Smith" from post #123456)
244	10	if (!preg_match('#[^\\]\\n]?(?=\\s(?:\\s/)?\\]\|\\s+[-\\w]+=)#', $this->text, $m, null, $this->pos))
245		{
246	1	throw new RuntimeException;
247		}
248
249	9	$attrValue = $m[0];
250	9	$this->pos += strlen($attrValue);
251
252	9	return $attrValue;
253		}
254
255		/**
256		* Parse current BBCode
257		*
258		* @return void
259		*/
260	50	protected function parseBBCode()
261		{
262	50	$this->parseBBCodeSuffix();
263
264		// Test whether this is an end tag
265	50	if ($this->text[$this->startPos + 1] === '/')
266		{
267		// Test whether the tag is properly closed and whether this tag has an identifier.
268		// We skip end tags that carry an identifier because they're automatically added
269		// when their start tag is processed
270	25	if (substr($this->text, $this->pos, 1) === ']' && $this->bbcodeSuffix === '')
271		{
272	22	++$this->pos;
273	22	$this->addBBCodeEndTag();
274		}
275
276	25	return;
277		}
278
279		// Parse attributes
280	49	$this->parseAttributes();
281
282		// Test whether the tag is properly closed
283	42	if (substr($this->text, $this->pos, 1) === ']')
284		{
285	26	++$this->pos;
286		}
287		else
288		{
289		// Test whether this is a self-closing tag
290	16	if (substr($this->text, $this->pos, 2) === '/]')
291		{
292	13	$this->pos += 2;
293	13	$this->addBBCodeSelfClosingTag();
294		}
295
296	16	return;
297		}
298
299		// Record the names of attributes that need the content of this tag
300	26	$contentAttributes = [];
301	26	if (isset($this->bbcodeConfig['contentAttributes']))
302		{
303	4	foreach ($this->bbcodeConfig['contentAttributes'] as $attrName)
304		{
305	4	if (!isset($this->attributes[$attrName]))
306		{
307	4	$contentAttributes[] = $attrName;
308		}
309		}
310		}
311
312		// Look ahead and parse the end tag that matches this tag, if applicable
313	26	$requireEndTag = ($this->bbcodeSuffix \|\| !empty($this->bbcodeConfig['forceLookahead']));
314	26	$endTag = ($requireEndTag \|\| !empty($contentAttributes)) ? $this->captureEndTag() : null;
315	26	if (isset($endTag))
316		{
317	7	foreach ($contentAttributes as $attrName)
318		{
319	7	$this->attributes[$attrName] = substr($this->text, $this->pos, $endTag->getPos() - $this->pos);
320		}
321		}
322	21	elseif ($requireEndTag)
323		{
324	4	return;
325		}
326
327		// Create this start tag
328	23	$tag = $this->addBBCodeStartTag();
329
330		// If an end tag was created, pair it with this start tag
331	23	if (isset($endTag))
332		{
333	7	$tag->pairWith($endTag);
334		}
335	23	}
336
337		/**
338		* Parse the BBCode suffix starting at current position
339		*
340		* Used to explicitly pair specific tags together, e.g.
341		* [code:123][code]type your code here[/code][/code:123]
342		*
343		* @return void
344		*/
345	50	protected function parseBBCodeSuffix()
346		{
347	50	$this->bbcodeSuffix = '';
348	50	if ($this->text[$this->pos] === ':')
349		{
350		// Capture the colon and the (0 or more) digits following it
351	7	$spn = 1 + strspn($this->text, '0123456789', 1 + $this->pos);
352	7	$this->bbcodeSuffix = substr($this->text, $this->pos, $spn);
353
354		// Move past the suffix
355	7	$this->pos += $spn;
356		}
357	50	}
358
359		/**
360		* Parse a quoted attribute value that starts at current offset
361		*
362		* @return string
363		*/
364	14	protected function parseQuotedAttributeValue()
365		{
366	14	$quote = $this->text[$this->pos];
367	14	$valuePos = $this->pos + 1;
368	14	while (1)
369		{
370		// Look for the next quote
371	14	$this->pos = strpos($this->text, $quote, $this->pos + 1);
372	14	if ($this->pos === false)
373		{
374		// No matching quote. Apparently that string never ends...
375	3	throw new RuntimeException;
376		}
377
378		// Test for an odd number of backslashes before this character
379	11	$n = 0;
380		do
381		{
382	11	++$n;
383		}
384	11	while ($this->text[$this->pos - $n] === '\\');
385
386	11	if ($n % 2)
387		{
388		// If $n is odd, it means there's an even number of backslashes. We can exit this
389		// loop
390	11	break;
391		}
392		}
393
394		// Unescape special characters ' " and \
395	11	$attrValue = preg_replace(
396	11	'#\\\\([\\\\\'"])#',
397	11	'$1',
398	11	substr($this->text, $valuePos, $this->pos - $valuePos)
399		);
400
401		// Skip past the closing quote
402	11	++$this->pos;
403
404	11	return $attrValue;
405		}
406		}

s9e / TextFormatter

Push — master ( bcddd9...147c77 )

Parser::parseBBCode() C

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