Parser::parse() - Code Metrics - Inspection of "VoidFramework 4.0.0dev" - winforms-php/VoidFramework - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Branch — dev (e0c5fc)

by Observer

created 2019-10-26 15:33 UTC

Parser::parse() F

↳ Parent: Parser

Complexity

Conditions	36
Paths	460

Size

Total Lines	256
Code Lines	127

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	127
c	0
b	0
f	0
dl	0
loc	256
rs	0.6
cc	36
nc	460
nop	1

How to fix Long Method Complexity

<?php

namespace VLF;

/**
 * Парсер VLF разметки
 */
class Parser
{
    // Разделитель строк
    public static string $divider = "\n";

    /**
     * Парсер AST дерева из VLF разметки
     * 
     * @param string $vlf - VLF разметка
     * 
     * @return AST - возвращает AST дерево разметки
     */
    public static function parse (string $vlf): AST
    {
        $tree    = new AST;
        $objects = new Stack;

        if (file_exists ($vlf))
            $vlf = file_get_contents ($vlf);

        $lines   = explode (self::$divider, $vlf);
        $skip_at = -1;

        foreach ($lines as $line_num => $line)
        {
            // \VoidEngine\pre ($line_num .', '. ($skip_at > $line_num ? 'skip' : 'not skip') .': '. $line);

            if ($skip_at > $line_num || !self::filter ($line))
                continue;

            $height = self::getHeight ($line);
            $words  = array_filter (explode (' ', $line), 'VLF\Parser::filter');
            $poped  = false;

            # Очищаем стек объектов
            while ($objects->size () > 0)
                if ($objects->current ()->height >= $height)
                {
                    $objects->pop ();
                    
                    $poped = true;
                }

                else break;

            # Создаём новую ссылку на объект
            if ($poped && $objects->size () > 0)
            {
                $object = $objects->pop ();

                $objects->push (new Node (array_merge ($object->export (), ['nodes' => []])));
                $tree->push ($objects->current ());
            }

            /**
             * Импорт таблиц стилей
             */
            if ($words[0] == 'import')
            {
                $imports = substr ($line, strlen ($words[0]));
                $parsed  = self::parseSubtext ($lines, $line_num, $height);

                $imports .= $parsed[0];
                $skip_at  = $parsed[1];

                $imports = self::filter ($imports) ?
                    array_map ('trim', self::parseArguments ($imports)) : [];

                $tree->push (new Node ([
                    'type'   => STYLES_IMPORTING,
                    'line'   => $line,
                    'words'  => $words,
                    'height' => $height,

                    'args' => [
                        'imports' => $imports
                    ]
                ]));
            }

            /**
             * Комментарии
             */
            elseif ($words[0][0] == '#')
            {
                /**
                 * Обработка многострочных комментариев
                 */
                if (isset ($words[0][1]))
                {
                    if ($words[0][1] == '^')
                        $skip_at = self::parseSubtext ($lines, $line_num, $height)[1];

                    else throw new \Exception ('Unknown char founded after comment definition at line '. ($line_num + 1));
                }

                continue;
            }

            /**
             * Выполнение PHP кода
             */
            elseif ($words[0][0] == '%')
            {
                $code = substr ($line, strlen ($words[0]));

                /**
                 * Обработка многострочного кода
                 */
                if (isset ($words[0][1]))
                {
                    if ($words[0][1] == '^')
                    {
                        $parsed = self::parseSubtext ($lines, $line_num, $height);

                        $code   .= $parsed[0];
                        $skip_at = $parsed[1];
                    }

                    else throw new \Exception ('Unknown char founded after runtime execution definition at line '. ($line_num + 1));
                }

                $tree->push (new Node ([
                    'type'   => RUNTIME_EXECUTION,
                    'line'   => $line,
                    'words'  => $words,
                    'height' => $height,

                    'args' => [
                        'code' => $code
                    ]
                ]));
            }

            /**
             * Установка свойства
             */
            elseif (($pos = strpos ($line, ':')) !== false)
            {
                if ($objects->size () == 0)
                    throw new \Exception ('Trying to set property to unknown object at line '. ($line_num + 1));

                if (!isset ($words[1]))
                    throw new \Exception ('Trying to set void property value at line '. ($line_num + 1));

                $propertyName  = substr ($line, 0, $pos);
                $propertyValue = substr ($line, $pos + 1);

                /**
                 * Обработка многострочных свойств
                 */
                if ($line[$pos + 1] == '^')
                {
                    $parsed = self::parseSubtext ($lines, $line_num, $height);

                    $propertyValue = substr ($propertyValue, 1) . $parsed[0];
                    $skip_at       = $parsed[1];
                }

                $objects->current ()->push (new Node ([
                    'type'   => PROPERTY_SET,
                    'line'   => $line,
                    'words'  => $words,
                    'height' => $height,

                    'args' => [
                        'name'  => $propertyName,
                        'value' => $propertyValue
                    ]
                ]));
            }

            /**
             * Вызов метода
             */
            elseif (isset ($words[0][1]) && $words[0][0] == '-' && $words[0][1] == '>')
            {
                if ($objects->size () == 0)
                    throw new \Exception ('Trying to call method from unknown object at line '. ($line_num + 1));

                $methodArgs = [];

                if (($pos = strpos ($line, '(')) !== false)
                {
                    if (($end = strrpos ($line, ')', $pos)) === false)
                        throw new \Exception ('Incorrect method arguments syntax at line '. ($line_num + 1));

                    $methodArgs = substr ($line, $pos + 1, $end - $pos - 1);

                    $methodName = trim (substr ($line, 2, $pos - 2));
                    $methodArgs = self::filter ($methodArgs) ?
                        self::parseArguments ($methodArgs) : [];
                }

                else $methodName = trim (substr ($line, 2));

                $objects->current ()->push (new Node ([
                    'type'   => METHOD_CALL,
                    'line'   => $line,
                    'words'  => $words,
                    'height' => $height,

                    'args' => [
                        'name' => $methodName,
                        'args' => $methodArgs
                    ]
                ]));
            }

            /**
             * Объявление объекта
             */
            elseif (sizeof ($words) > 1)
            {
                $class  = $words[0];
                $name   = $words[1];
                $args   = [];
                $styles = [];

                if ($objects->size () > 0 && $objects->current ()->height < $height)
                    $args[] = $objects->current ()->args['name'];

                if (($pos = strpos ($line, '(')) !== false)
                {
                    if (($end = strrpos ($line, ')', $pos)) === false)
                        throw new \Exception ('Incorrect class constructor arguments syntax at line '. ($line_num + 1));

                    $args = substr ($line, $pos + 1, $end - $pos - 1);

                    $name = substr ($line, $len = strlen ($class), $pos - $len);
                    $args = self::filter ($args) ?
                        self::parseArguments ($args) : [];
                }

                if (($end = strpos ($line, '>')) !== false)
                {
                    $styles = trim (substr ($line, $end + 1));

                    if (strlen ($styles) == 0)
                        throw new \Exception ('Trying to set empty style to object');

                    $styles = array_map ('trim', explode (',', $styles));
                }

                $objects->push (new Node ([
                    'type'   => OBJECT_DEFINITION,
                    'line'   => $line,
                    'words'  => $words,
                    'height' => $height,

                    'args' => [
                        'class'  => $class,
                        'name'   => trim ($name),
                        'args'   => $args,
                        'styles' => $styles
                    ]
                ]));

                $tree->push ($objects->current ());
            }

            /**
             * Неопознанная структура
             */
            else throw new \Exception ('Unsupported structure founded at line '. ($line_num + 1));
        }

        return $tree;
    }

    /**
     * Подсчёт высоты строки (кол-во пробельных символов в её начале)
     * 
     * @param string &$line - строка
     * 
     * @return int - возвращает её высоту
     */
    protected static function getHeight (string &$line): int
    {
        $i = 0;
        $height = 0;

        while (isset ($line[$i]) && ctype_space ($line[$i]))
        {
            ++$height;

            if ($line[$i] == "\t")
                $height += 3;

            ++$i;
        }

        $line = substr ($line, $i);

        return $height;
    }

    /**
     * Проверка строки на пустоту
     * 
     * @param string $line - строка для проверки
     * 
     * @return bool - возвращает true если строка не пустая
     */
    protected static function filter (string $line): bool
    {
        return strlen (trim ($line)) > 0;
    }

    /**
     * Парсинг текста, лежащего на указанной высоте
     * 
     * @param array $lines     - массив строк
     * @param mixed $begin_id  - индекс начальной строки
     * @param int $down_height - минимальная высота строки
     * 
     * @return array - возвращает массив [текст, конечный индекс]
     */
    protected static function parseSubtext (array $lines, $begin_id, int $down_height): array
    {
        $parsed = "\n";

        foreach ($lines as $line_id => $line)
        {
            if ($line_id <= $begin_id)
                continue;

            if (!self::filter ($line))
            {
                $parsed .= "\n";
            
                continue;
            }

            $height = self::getHeight ($line);

            if ($height > $down_height)
                $parsed .= str_repeat (' ', $height - $down_height) ."$line\n";

            else return [$parsed, $line_id];
        }

        return [$parsed, $line_id + 1];

    }

    /**
     * Парсинг аргументов из текста
     * 
     * @param string $arguments - текст для парсинга
     * 
     * @return array - возвращает массив аргументов
     */
    protected static function parseArguments (string $arguments): array
    {
        $args = [];

        $split1   = $split2 = false;
        $canSplit = -1;

        $t = '';

        for ($i = 0, $len = strlen ($arguments); $i < $len; ++$i)
        {
            $t .= $arguments[$i];
            
            if ($arguments[$i] == '\\')
                $canSplit = $i + 1;

            elseif ($canSplit < $i)
            {
                if ($arguments[$i] == '\'' && !$split2)
                    $split1 = !$split1;


                elseif ($arguments[$i] == '"' && !$split1)
                    $split2 = !$split2;

                elseif (!$split1 && !$split2 && $arguments[$i] == ',')
                {
                    $args[] = substr ($t, 0, -1);
                    $t = '';
                }
            }
        }

        $args[] = $t;

        return $args;
    }
}


1			<?php
2
3			namespace VLF;
4
5			/**
6			* Парсер VLF разметки
7			*/
8			class Parser
9			{
10			// Разделитель строк
11			public static string $divider = "\n";
12
13			/**
14			* Парсер AST дерева из VLF разметки
15			*
16			* @param string $vlf - VLF разметка
17			*
18			* @return AST - возвращает AST дерево разметки
19			*/
20			public static function parse (string $vlf): AST
21			{
22			$tree = new AST;
23			$objects = new Stack;
24
25			if (file_exists ($vlf))
26			$vlf = file_get_contents ($vlf);
27
28			$lines = explode (self::$divider, $vlf);
29			$skip_at = -1;
30
31			foreach ($lines as $line_num => $line)
32			{
33			// \VoidEngine\pre ($line_num .', '. ($skip_at > $line_num ? 'skip' : 'not skip') .': '. $line);
34
35			if ($skip_at > $line_num \|\| !self::filter ($line))
36			continue;
37
38			$height = self::getHeight ($line);
39			$words = array_filter (explode (' ', $line), 'VLF\Parser::filter');
40			$poped = false;
41
42			# Очищаем стек объектов
43			while ($objects->size () > 0)
44			if ($objects->current ()->height >= $height)
45			{
46			$objects->pop ();
47
48			$poped = true;
49			}
50
51			else break;
52
53			# Создаём новую ссылку на объект
54			if ($poped && $objects->size () > 0)
55			{
56			$object = $objects->pop ();
57
58			$objects->push (new Node (array_merge ($object->export (), ['nodes' => []])));
59			$tree->push ($objects->current ());
60			}
61
62			/**
63			* Импорт таблиц стилей
64			*/
65			if ($words[0] == 'import')
66			{
67			$imports = substr ($line, strlen ($words[0]));
68			$parsed = self::parseSubtext ($lines, $line_num, $height);
69
70			$imports .= $parsed[0];
71			$skip_at = $parsed[1];
72
73			$imports = self::filter ($imports) ?
74			array_map ('trim', self::parseArguments ($imports)) : [];
75
76			$tree->push (new Node ([
77			'type' => STYLES_IMPORTING,
78			'line' => $line,
79			'words' => $words,
80			'height' => $height,
81
82			'args' => [
83			'imports' => $imports
84			]
85			]));
86			}
87
88			/**
89			* Комментарии
90			*/
91			elseif ($words[0][0] == '#')
92			{
93			/**
94			* Обработка многострочных комментариев
95			*/
96			if (isset ($words[0][1]))
97			{
98			if ($words[0][1] == '^')
99			$skip_at = self::parseSubtext ($lines, $line_num, $height)[1];
100
101			else throw new \Exception ('Unknown char founded after comment definition at line '. ($line_num + 1));
102			}
103
104			continue;
105			}
106
107			/**
108			* Выполнение PHP кода
109			*/
110			elseif ($words[0][0] == '%')
111			{
112			$code = substr ($line, strlen ($words[0]));
113
114			/**
115			* Обработка многострочного кода
116			*/
117			if (isset ($words[0][1]))
118			{
119			if ($words[0][1] == '^')
120			{
121			$parsed = self::parseSubtext ($lines, $line_num, $height);
122
123			$code .= $parsed[0];
124			$skip_at = $parsed[1];
125			}
126
127			else throw new \Exception ('Unknown char founded after runtime execution definition at line '. ($line_num + 1));
128			}
129
130			$tree->push (new Node ([
131			'type' => RUNTIME_EXECUTION,
132			'line' => $line,
133			'words' => $words,
134			'height' => $height,
135
136			'args' => [
137			'code' => $code
138			]
139			]));
140			}
141
142			/**
143			* Установка свойства
144			*/
145			elseif (($pos = strpos ($line, ':')) !== false)
146			{
147			if ($objects->size () == 0)
148			throw new \Exception ('Trying to set property to unknown object at line '. ($line_num + 1));
149
150			if (!isset ($words[1]))
151			throw new \Exception ('Trying to set void property value at line '. ($line_num + 1));
152
153			$propertyName = substr ($line, 0, $pos);
154			$propertyValue = substr ($line, $pos + 1);
155
156			/**
157			* Обработка многострочных свойств
158			*/
159			if ($line[$pos + 1] == '^')
160			{
161			$parsed = self::parseSubtext ($lines, $line_num, $height);
162
163			$propertyValue = substr ($propertyValue, 1) . $parsed[0];
164			$skip_at = $parsed[1];
165			}
166
167			$objects->current ()->push (new Node ([
168			'type' => PROPERTY_SET,
169			'line' => $line,
170			'words' => $words,
171			'height' => $height,
172
173			'args' => [
174			'name' => $propertyName,
175			'value' => $propertyValue
176			]
177			]));
178			}
179
180			/**
181			* Вызов метода
182			*/
183			elseif (isset ($words[0][1]) && $words[0][0] == '-' && $words[0][1] == '>')
184			{
185			if ($objects->size () == 0)
186			throw new \Exception ('Trying to call method from unknown object at line '. ($line_num + 1));
187
188			$methodArgs = [];
189
190			if (($pos = strpos ($line, '(')) !== false)
191			{
192			if (($end = strrpos ($line, ')', $pos)) === false)
193			throw new \Exception ('Incorrect method arguments syntax at line '. ($line_num + 1));
194
195			$methodArgs = substr ($line, $pos + 1, $end - $pos - 1);
196
197			$methodName = trim (substr ($line, 2, $pos - 2));
198			$methodArgs = self::filter ($methodArgs) ?
199			self::parseArguments ($methodArgs) : [];
200			}
201
202			else $methodName = trim (substr ($line, 2));
203
204			$objects->current ()->push (new Node ([
205			'type' => METHOD_CALL,
206			'line' => $line,
207			'words' => $words,
208			'height' => $height,
209
210			'args' => [
211			'name' => $methodName,
212			'args' => $methodArgs
213			]
214			]));
215			}
216
217			/**
218			* Объявление объекта
219			*/
220			elseif (sizeof ($words) > 1)
221			{
222			$class = $words[0];
223			$name = $words[1];
224			$args = [];
225			$styles = [];
226
227			if ($objects->size () > 0 && $objects->current ()->height < $height)
228			$args[] = $objects->current ()->args['name'];
229
230			if (($pos = strpos ($line, '(')) !== false)
231			{
232			if (($end = strrpos ($line, ')', $pos)) === false)
233			throw new \Exception ('Incorrect class constructor arguments syntax at line '. ($line_num + 1));
234
235			$args = substr ($line, $pos + 1, $end - $pos - 1);
236
237			$name = substr ($line, $len = strlen ($class), $pos - $len);
238			$args = self::filter ($args) ?
239			self::parseArguments ($args) : [];
240			}
241
242			if (($end = strpos ($line, '>')) !== false)
243			{
244			$styles = trim (substr ($line, $end + 1));
245
246			if (strlen ($styles) == 0)
247			throw new \Exception ('Trying to set empty style to object');
248
249			$styles = array_map ('trim', explode (',', $styles));
250			}
251
252			$objects->push (new Node ([
253			'type' => OBJECT_DEFINITION,
254			'line' => $line,
255			'words' => $words,
256			'height' => $height,
257
258			'args' => [
259			'class' => $class,
260			'name' => trim ($name),
261			'args' => $args,
262			'styles' => $styles
263			]
264			]));
265
266			$tree->push ($objects->current ());
267			}
268
269			/**
270			* Неопознанная структура
271			*/
272			else throw new \Exception ('Unsupported structure founded at line '. ($line_num + 1));
273			}
274
275			return $tree;
276			}
277
278			/**
279			* Подсчёт высоты строки (кол-во пробельных символов в её начале)
280			*
281			* @param string &$line - строка
282			*
283			* @return int - возвращает её высоту
284			*/
285			protected static function getHeight (string &$line): int
286			{
287			$i = 0;
288			$height = 0;
289
290			while (isset ($line[$i]) && ctype_space ($line[$i]))
291			{
292			++$height;
293
294			if ($line[$i] == "\t")
295			$height += 3;
296
297			++$i;
298			}
299
300			$line = substr ($line, $i);
301
302			return $height;
303			}
304
305			/**
306			* Проверка строки на пустоту
307			*
308			* @param string $line - строка для проверки
309			*
310			* @return bool - возвращает true если строка не пустая
311			*/
312			protected static function filter (string $line): bool
313			{
314			return strlen (trim ($line)) > 0;
315			}
316
317			/**
318			* Парсинг текста, лежащего на указанной высоте
319			*
320			* @param array $lines - массив строк
321			* @param mixed $begin_id - индекс начальной строки
322			* @param int $down_height - минимальная высота строки
323			*
324			* @return array - возвращает массив [текст, конечный индекс]
325			*/
326			protected static function parseSubtext (array $lines, $begin_id, int $down_height): array
327			{
328			$parsed = "\n";
329
330			foreach ($lines as $line_id => $line)
331			{
332			if ($line_id <= $begin_id)
333			continue;
334
335			if (!self::filter ($line))
336			{
337			$parsed .= "\n";
338
339			continue;
340			}
341
342			$height = self::getHeight ($line);
343
344			if ($height > $down_height)
345			$parsed .= str_repeat (' ', $height - $down_height) ."$line\n";
346
347			else return [$parsed, $line_id];
348			}
349
350			return [$parsed, $line_id + 1];
			0 ignored issues – show Comprehensibility Best Practice introduced 2019-10-26 15:08 UTC by Report Bug Copy Issue Report The variable `$line_id` seems to be defined by a `foreach` iteration on line `330`. Are you sure the iterator is never empty, otherwise this variable is not defined? Loading history...
351			}
352
353			/**
354			* Парсинг аргументов из текста
355			*
356			* @param string $arguments - текст для парсинга
357			*
358			* @return array - возвращает массив аргументов
359			*/
360			protected static function parseArguments (string $arguments): array
361			{
362			$args = [];
363
364			$split1 = $split2 = false;
365			$canSplit = -1;
366
367			$t = '';
368
369			for ($i = 0, $len = strlen ($arguments); $i < $len; ++$i)
370			{
371			$t .= $arguments[$i];
372
373			if ($arguments[$i] == '\\')
374			$canSplit = $i + 1;
375
376			elseif ($canSplit < $i)
377			{
378			if ($arguments[$i] == '\'' && !$split2)
379			$split1 = !$split1;
			0 ignored issues – show introduced 2019-10-01 17:35 UTC by Report Bug Copy Issue Report The condition `$split1` is always `false`. Loading history...
380
381			elseif ($arguments[$i] == '"' && !$split1)
382			$split2 = !$split2;
383
384			elseif (!$split1 && !$split2 && $arguments[$i] == ',')
385			{
386			$args[] = substr ($t, 0, -1);
387			$t = '';
388			}
389			}
390			}
391
392			$args[] = $t;
393
394			return $args;
395			}
396			}
397

winforms-php / VoidFramework

Branch — dev (e0c5fc)

Parser::parse() F

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Duplication Side-by-Side

Filter issues like