Loader::_attachBlankLines() - Code Metrics - Inspection of "fix composer.json type + refactor Tag class to Tag..." - dallgoot/yaml - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 86484b...f97b0a )

by stéphane

created 2019-04-22 14:57 UTC

Loader::_attachBlankLines() A

↳ Parent: Loader

Complexity

Conditions	3
Paths	3

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	3

Importance

Changes

Metric	Value
eloc	4
dl	0
loc	8
ccs	3
cts	3
cp	1
rs	10
c	0
b	0
f	0
cc	3
nc	3
nop	1
crap	3

<?php
declare(strict_types=1);

namespace Dallgoot\Yaml;

/**
 * Process reading a Yaml Content (loading file if required)
 * and for each line affects appropriate NodeType
 * and attach to proper parent Node
 * ie. constructs a tree of Nodes with a NodeRoot as first Node
 *
 * @author  Stéphane Rebai <[email protected]>
 * @license Apache 2.0
 * @link    https://github.com/dallgoot/yaml
 */
final class Loader
{
    //public
    /* @var null|string */
    public static $error;
    public const IGNORE_DIRECTIVES     = 1;//DONT include_directive
    public const IGNORE_COMMENTS       = 2;//DONT include_comments
    public const NO_PARSING_EXCEPTIONS = 4;//DONT throw Exception on parsing errors
    public const NO_OBJECT_FOR_DATE    = 8;//DONT import date strings as dateTime Object

    //private
    /* @var null|array */
    private $content;
    /* @var null|string */
    private $filePath;
    /* @var integer */
    private $_debug = 0;
    /* @var integer */
    private $_options = 0;
    /* @var array */
    private $_blankBuffer = [];

    //Exceptions messages
    private const INVALID_VALUE        = self::class.": at line %d";
    private const EXCEPTION_NO_FILE    = self::class.": file '%s' does not exists (or path is incorrect?)";
    private const EXCEPTION_READ_ERROR = self::class.": file '%s' failed to be loaded (permission denied ?)";
    private const EXCEPTION_LINE_SPLIT = self::class.": content is not a string (maybe a file error?)";

    /**
     * Loader constructor
     *
     * @param string|null       $absolutePath The file absolute path
     * @param int|null          $options      The options (bitmask as int value)
     * @param integer|bool|null $debug        The debug level as either boolean (true=1) or any integer
     */
    public function __construct($absolutePath = null, $options = null, $debug = 0)
    {
        $this->_debug   = is_null($debug) ? 0 : min($debug, 3);
        $this->_options = is_int($options) ? $options : $this->_options;
        if (is_string($absolutePath)) {
            $this->load($absolutePath);
        }
    }

    /**
     * Load a file and save its content as $content
     *
     * @param string $absolutePath The absolute path of a file
     *
     * @throws \Exception if file don't exist OR reading failed
     *
     * @return self  ( returns the same Loader  )
     */
    public function load(string $absolutePath):Loader
    {
        if (!file_exists($absolutePath)) {
            throw new \Exception(sprintf(self::EXCEPTION_NO_FILE, $absolutePath));
        }
        $this->filePath = $absolutePath;
        $adle = "auto_detect_line_endings";
        $prevADLE = ini_get($adle);
        !$prevADLE && ini_set($adle, "true");
        $content = @file($absolutePath, FILE_IGNORE_NEW_LINES);
        !$prevADLE && ini_set($adle, "false");
        if (is_bool($content)) {
            throw new \Exception(sprintf(self::EXCEPTION_READ_ERROR, $absolutePath));
        }
        $this->content = $content;
        return $this;
    }

    /**
     * Gets the source iterator.
     *
     * @param string|null $strContent  The string content
     *
     * @throws \Exception if self::content is empty or splitting on linefeed has failed
     * @return \Generator  The source iterator.
     * @todo make sure linefeed replacing only happens on end of the lines
     */
    private function getSourceGenerator($strContent = null):\Generator
    {
        if (is_null($strContent) && is_null($this->content)) {
            throw new \Exception(self::EXCEPTION_LINE_SPLIT);
        }
        if (!is_null($this->content)) {
            $source = $this->content;
        } else {
            $simplerLineFeeds = preg_replace('/(\r\n|\r)/', "\n", $strContent);
            $source = preg_split("/\n/m", $simplerLineFeeds, 0, PREG_SPLIT_DELIM_CAPTURE);
        }
        if (!is_array($source) || !count($source)) {
            throw new \Exception(self::EXCEPTION_LINE_SPLIT);
        }
        foreach ($source as $key => $value) {
            yield ++$key => $value;
        }
    }

    /**
     * Parse Yaml lines into a hierarchy of Node
     *
     * @param string $strContent The Yaml string or null to parse loaded content
     *
     * @throws \Exception    if content is not available as $strContent or as $this->content (from file)
     * @throws \ParseError  if any error during parsing or building
     *
     * @return array|YamlObject|null      null on errors if NO_PARSING_EXCEPTIONS is set, otherwise an array of YamlObject or just YamlObject
     */
    public function parse($strContent = null)
    {
        $generator = $this->getSourceGenerator($strContent);
        $previous = $root = new NodeRoot();
        try {
            foreach ($generator as $lineNb => $lineString) {
                $node = NodeFactory::get($lineString, $lineNb);
                if ($this->_debug === 1) echo get_class($node)."\n";
                if ($this->needsSpecialProcess($node, $previous)) continue;
                $this->_attachBlankLines($previous);
                switch ($node->indent <=> $previous->indent) {
                    case -1: $target = $previous->getTargetOnLessIndent($node);
                        break;
                    case 0:  $target = $previous->getTargetOnEqualIndent($node);
                        break;
                    default: $target = $previous->getTargetOnMoreIndent($node);
                }
                $previous = $target->add($node);
            }
            $this->_attachBlankLines($previous);
            if ($this->_debug === 1){
                return;
            }
            return Builder::buildContent($root, $this->_debug);
        } catch (\Error|\Exception|\ParseError $e) {
            $this->onError($e, $generator);
        }
    }


    /**
     * Attach blank (empty) Nodes saved in $_blankBuffer to their parent (it means they are meaningful content)
     *
     * @param array $emptyLines The empty lines
     * @param Node  $previous   The previous Node
     *
     * @return null
     */
    private function _attachBlankLines(Node &$previous)
    {
        foreach ($this->_blankBuffer as $blankNode) {
            if ($blankNode !== $previous) {
                $blankNode->getParent()->add($blankNode);
            }
        }
        $this->_blankBuffer = [];
    }

    /**
     * For certain (special) Nodes types some actions are required BEFORE parent assignment
     *
     * @param Node   $previous   The previous Node
     * @param array  $emptyLines The empty lines
     *
     * @return boolean  if True self::parse skips changing previous and adding to parent
     * @see self::parse
     */
    private function needsSpecialProcess(Node $current, Node &$previous):bool
    {
        $deepest = $previous->getDeepestNode();
        if ($deepest instanceof NodePartial) {
            return $deepest->specialProcess($current,  $this->_blankBuffer);
        } elseif(!($current instanceof NodePartial)) {
            return $current->specialProcess($previous, $this->_blankBuffer);
        }
        return false;
    }

    private function onError(object $e, \Generator $generator)
    {
        $file = $this->filePath ? realpath($this->filePath) : '#YAML STRING#';
        $message = $e->getMessage()."\n ".$e->getFile().":".$e->getLine();
        if ($this->_options & self::NO_PARSING_EXCEPTIONS) {
            self::$error = $message;
            return null;
        }
        $line = $generator->key() ?? 'X';
        throw new \Exception($message." for $file:".$line, 1, $e);
    }
}


1		<?php
2		declare(strict_types=1);
3
4		namespace Dallgoot\Yaml;
5
6		/**
7		* Process reading a Yaml Content (loading file if required)
8		* and for each line affects appropriate NodeType
9		* and attach to proper parent Node
10		* ie. constructs a tree of Nodes with a NodeRoot as first Node
11		*
12		* @author Stéphane Rebai <[email protected]>
13		* @license Apache 2.0
14		* @link https://github.com/dallgoot/yaml
15		*/
16		final class Loader
17		{
18		//public
19		/* @var null\|string */
20		public static $error;
21		public const IGNORE_DIRECTIVES = 1;//DONT include_directive
22		public const IGNORE_COMMENTS = 2;//DONT include_comments
23		public const NO_PARSING_EXCEPTIONS = 4;//DONT throw Exception on parsing errors
24		public const NO_OBJECT_FOR_DATE = 8;//DONT import date strings as dateTime Object
25
26		//private
27		/* @var null\|array */
28		private $content;
29		/* @var null\|string */
30		private $filePath;
31		/* @var integer */
32		private $_debug = 0;
33		/* @var integer */
34		private $_options = 0;
35		/* @var array */
36		private $_blankBuffer = [];
37
38		//Exceptions messages
39		private const INVALID_VALUE = self::class.": at line %d";
40		private const EXCEPTION_NO_FILE = self::class.": file '%s' does not exists (or path is incorrect?)";
41		private const EXCEPTION_READ_ERROR = self::class.": file '%s' failed to be loaded (permission denied ?)";
42		private const EXCEPTION_LINE_SPLIT = self::class.": content is not a string (maybe a file error?)";
43
44		/**
45		* Loader constructor
46		*
47		* @param string\|null $absolutePath The file absolute path
48	11	* @param int\|null $options The options (bitmask as int value)
49		* @param integer\|bool\|null $debug The debug level as either boolean (true=1) or any integer
50	11	*/
51	11	public function __construct($absolutePath = null, $options = null, $debug = 0)
52	11	{
53	1	$this->_debug = is_null($debug) ? 0 : min($debug, 3);
54		$this->_options = is_int($options) ? $options : $this->_options;
55	11	if (is_string($absolutePath)) {
56		$this->load($absolutePath);
57		}
58		}
59
60		/**
61		* Load a file and save its content as $content
62		*
63		* @param string $absolutePath The absolute path of a file
64		*
65		* @throws \Exception if file don't exist OR reading failed
66	3	*
67		* @return self ( returns the same Loader )
68	3	*/
69	1	public function load(string $absolutePath):Loader
70		{
71	2	if (!file_exists($absolutePath)) {
72	2	throw new \Exception(sprintf(self::EXCEPTION_NO_FILE, $absolutePath));
73	2	}
74	2	$this->filePath = $absolutePath;
75	2	$adle = "auto_detect_line_endings";
76	2	$prevADLE = ini_get($adle);
77	2	!$prevADLE && ini_set($adle, "true");
78	1	$content = @file($absolutePath, FILE_IGNORE_NEW_LINES);
79		!$prevADLE && ini_set($adle, "false");
80	1	if (is_bool($content)) {
81	1	throw new \Exception(sprintf(self::EXCEPTION_READ_ERROR, $absolutePath));
82		}
83		$this->content = $content;
84		return $this;
85		}
86
87		/**
88		* Gets the source iterator.
89		*
90		* @param string\|null $strContent The string content
91		*
92	3	* @throws \Exception if self::content is empty or splitting on linefeed has failed
93		* @return \Generator The source iterator.
94	3	* @todo make sure linefeed replacing only happens on end of the lines
95	1	*/
96		private function getSourceGenerator($strContent = null):\Generator
97	2	{
98		if (is_null($strContent) && is_null($this->content)) {
99		throw new \Exception(self::EXCEPTION_LINE_SPLIT);
100	2	}
101	2	if (!is_null($this->content)) {
102		$source = $this->content;
103	2	} else {
104		$simplerLineFeeds = preg_replace('/(\r\n\|\r)/', "\n", $strContent);
105		$source = preg_split("/\n/m", $simplerLineFeeds, 0, PREG_SPLIT_DELIM_CAPTURE);
106	2	}
107	2	if (!is_array($source) \|\| !count($source)) {
108		throw new \Exception(self::EXCEPTION_LINE_SPLIT);
109	2	}
110		foreach ($source as $key => $value) {
111		yield ++$key => $value;
112		}
113		}
114
115		/**
116		* Parse Yaml lines into a hierarchy of Node
117		*
118		* @param string $strContent The Yaml string or null to parse loaded content
119		*
120		* @throws \Exception if content is not available as $strContent or as $this->content (from file)
121	2	* @throws \ParseError if any error during parsing or building
122		*
123	2	* @return array\|YamlObject\|null null on errors if NO_PARSING_EXCEPTIONS is set, otherwise an array of YamlObject or just YamlObject
124	2	*/
125		public function parse($strContent = null)
126	2	{
127	2	$generator = $this->getSourceGenerator($strContent);
128	2	$previous = $root = new NodeRoot();
129	2	try {
130	2	foreach ($generator as $lineNb => $lineString) {
131	2	$node = NodeFactory::get($lineString, $lineNb);
132	1	if ($this->_debug === 1) echo get_class($node)."\n";
133	1	if ($this->needsSpecialProcess($node, $previous)) continue;
134	2	$this->_attachBlankLines($previous);
135	1	switch ($node->indent <=> $previous->indent) {
136	2	case -1: $target = $previous->getTargetOnLessIndent($node);
137		break;
138	2	case 0: $target = $previous->getTargetOnEqualIndent($node);
139		break;
140	2	default: $target = $previous->getTargetOnMoreIndent($node);
141	2	}
142		$previous = $target->add($node);
143		}
144	2	$this->_attachBlankLines($previous);
145	1	if ($this->_debug === 1){
146	1	return;
147		}
148		return Builder::buildContent($root, $this->_debug);
149		} catch (\Error\|\Exception\|\ParseError $e) {
150		$this->onError($e, $generator);
151		}
152		}
153
154
155		/**
156		* Attach blank (empty) Nodes saved in $_blankBuffer to their parent (it means they are meaningful content)
157		*
158		* @param array $emptyLines The empty lines
159	3	* @param Node $previous The previous Node
160		*
161	3	* @return null
162	1	*/
163	1	private function _attachBlankLines(Node &$previous)
164		{
165		foreach ($this->_blankBuffer as $blankNode) {
166	3	if ($blankNode !== $previous) {
167	3	$blankNode->getParent()->add($blankNode);
168		}
169		}
170		$this->_blankBuffer = [];
171		}
172
173		/**
174		* For certain (special) Nodes types some actions are required BEFORE parent assignment
175		*
176		* @param Node $previous The previous Node
177		* @param array $emptyLines The empty lines
178	3	*
179		* @return boolean if True self::parse skips changing previous and adding to parent
180	3	* @see self::parse
181	3	*/
182	1	private function needsSpecialProcess(Node $current, Node &$previous):bool
183	3	{
184	3	$deepest = $previous->getDeepestNode();
185		if ($deepest instanceof NodePartial) {
186	1	return $deepest->specialProcess($current, $this->_blankBuffer);
187		} elseif(!($current instanceof NodePartial)) {
188		return $current->specialProcess($previous, $this->_blankBuffer);
189	3	}
190		return false;
191	3	}
192	3
193	3	private function onError(object $e, \Generator $generator)
194	1	{
195	1	$file = $this->filePath ? realpath($this->filePath) : '#YAML STRING#';
196		$message = $e->getMessage()."\n ".$e->getFile().":".$e->getLine();
197	2	if ($this->_options & self::NO_PARSING_EXCEPTIONS) {
198	2	self::$error = $message;
199		return null;
200		}
201		$line = $generator->key() ?? 'X';
202		throw new \Exception($message." for $file:".$line, 1, $e);
203		}
204		}
205

dallgoot / yaml

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Loader::_attachBlankLines() A

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