Parser::pop() - Code Metrics - Inspection of "Merge pull request #2 from Badcow/rdata-handler" - Badcow/DNS-Parser - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 57eb77...af9a70 )

by Sam

created 2019-02-22 21:40 UTC

Parser::pop() A

↳ Parent: Project

Complexity

Conditions	1
Paths	1

Size

Total Lines	6
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	1

Importance

Changes

Metric	Value
eloc	3
dl	0
loc	6
ccs	4
cts	4
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	1
crap	1

<?php

namespace Badcow\DNS\Parser;

use Badcow\DNS\Classes;
use Badcow\DNS\ResourceRecord;
use Badcow\DNS\Zone;
use Badcow\DNS\Rdata;

class Parser
{
    /**
     * @var string
     */
    private $string;

    /**
     * @var string
     */
    private $previousName;

    /**
     * @var Zone
     */
    private $zone;

    /**
     * Array of methods that take an ArrayIterator and return an Rdata object. The array key is the Rdata type.
     *
     * @var array
     */
    private $rdataHandlers = [];

    /**
     * Parser constructor.
     * @param array $rdataHandlers
     */
    public function __construct(array $rdataHandlers = [])
    {
        $this->rdataHandlers = array_merge(RdataHandlers::getHandlers(), $rdataHandlers);
    }

    /**
     * @param string $name
     * @param string $zone
     *
     * @return Zone
     *
     * @throws ParseException
     */
    public static function parse(string $name, string $zone): Zone
    {
        return (new self())->makeZone($name, $zone);
    }

    /**
     * @param $name
     * @param $string
     *
     * @return Zone
     *
     * @throws ParseException
     */
    public function makeZone($name, $string): Zone
    {
        $this->zone = new Zone($name);
        $this->string = Normaliser::normalise($string);

        foreach (explode(Tokens::LINE_FEED, $this->string) as $line) {
            $this->processLine($line);
        }

        return $this->zone;
    }

    /**
     * @param string $line
     *
     * @throws ParseException
     */
    private function processLine(string $line): void
    {
        $iterator = new \ArrayIterator(explode(Tokens::SPACE, $line));

        if ($this->isControlEntry($iterator)) {
            $this->processControlEntry($iterator);

            return;
        }

        $resourceRecord = new ResourceRecord();

        $this->processResourceName($iterator, $resourceRecord);
        $this->processTtl($iterator, $resourceRecord);
        $this->processClass($iterator, $resourceRecord);
        $resourceRecord->setRdata($this->extractRdata($iterator));

        $this->zone->addResourceRecord($resourceRecord);
    }

    /**
     * Processes control entries at the top of a BIND record, i.e. $ORIGIN, $TTL, $INCLUDE, etc.
     *
     * @param \ArrayIterator $iterator
     */
    private function processControlEntry(\ArrayIterator $iterator): void
    {
        if ('$TTL' === strtoupper($iterator->current())) {
            $iterator->next();
            $this->zone->setDefaultTtl((int) $iterator->current());
        }
    }

    /**
     * Processes a ResourceRecord name.
     *
     * @param \ArrayIterator $iterator
     * @param ResourceRecord $resourceRecord
     */
    private function processResourceName(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
    {
        if ($this->isResourceName($iterator)) {
            $this->previousName = $iterator->current();
            $iterator->next();
        }

        $resourceRecord->setName($this->previousName);
    }

    /**
     * Set RR's TTL if there is one.
     *
     * @param \ArrayIterator $iterator
     * @param ResourceRecord $resourceRecord
     */
    private function processTtl(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
    {
        if ($this->isTTL($iterator)) {
            $resourceRecord->setTtl($iterator->current());
            $iterator->next();
        }
    }

    /**
     * Set RR's class if there is one.
     *
     * @param \ArrayIterator $iterator
     * @param ResourceRecord $resourceRecord
     */
    private function processClass(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
    {
        if (Classes::isValid(strtoupper($iterator->current()))) {
            $resourceRecord->setClass(strtoupper($iterator->current()));
            $iterator->next();
        }
    }

    /**
     * Determine if iterant is a resource name.
     *
     * @param \ArrayIterator $iterator
     *
     * @return bool
     */
    private function isResourceName(\ArrayIterator $iterator): bool
    {
        return !(
            $this->isTTL($iterator) ||
            Classes::isValid(strtoupper($iterator->current())) ||
            RDataTypes::isValid(strtoupper($iterator->current()))
        );
    }

    /**
     * Determine if iterant is a control entry such as $TTL, $ORIGIN, $INCLUDE, etcetera.
     *
     * @param \ArrayIterator $iterator
     *
     * @return bool
     */
    private function isControlEntry(\ArrayIterator $iterator): bool
    {
        return 1 === preg_match('/^\$[A-Z0-9]+/i', $iterator->current());
    }

    /**
     * Determine if the iterant is a TTL (i.e. it is an integer).
     *
     * @param \ArrayIterator $iterator
     *
     * @return bool
     */
    private function isTTL(\ArrayIterator $iterator): bool
    {
        return 1 === preg_match('/^\d+$/', $iterator->current());
    }

    /**
     * @param \ArrayIterator $iterator
     *
     * @return RData\RDataInterface
     *
     * @throws ParseException
     */
    private function extractRdata(\ArrayIterator $iterator): Rdata\RdataInterface
    {
        $type = strtoupper($iterator->current());
        $iterator->next();

        if (array_key_exists($type, $this->rdataHandlers)) {
            return call_user_func($this->rdataHandlers[$type], $iterator);
        }

        return RdataHandlers::catchAll($type, $iterator);
    }
}


1		<?php
2
3		namespace Badcow\DNS\Parser;
4
5		use Badcow\DNS\Classes;
6		use Badcow\DNS\ResourceRecord;
7		use Badcow\DNS\Zone;
8		use Badcow\DNS\Rdata;
9
10		class Parser
11		{
12		/**
13		* @var string
14		*/
15		private $string;
16
17		/**
18		* @var string
19		*/
20		private $previousName;
21
22		/**
23		* @var Zone
24		*/
25		private $zone;
26
27		/**
28		* Array of methods that take an ArrayIterator and return an Rdata object. The array key is the Rdata type.
29		*
30		* @var array
31		*/
32		private $rdataHandlers = [];
33
34		/**
35		* Parser constructor.
36		* @param array $rdataHandlers
37		*/
38	7	public function __construct(array $rdataHandlers = [])
39		{
40	7	$this->rdataHandlers = array_merge(RdataHandlers::getHandlers(), $rdataHandlers);
41	7	}
42
43		/**
44		* @param string $name
45		* @param string $zone
46		*
47		* @return Zone
48		*
49		* @throws ParseException
50		*/
51	7	public static function parse(string $name, string $zone): Zone
52		{
53	7	return (new self())->makeZone($name, $zone);
54		}
55
56		/**
57		* @param $name
58		* @param $string
59		*
60		* @return Zone
61		*
62		* @throws ParseException
63		*/
64	7	public function makeZone($name, $string): Zone
65		{
66	7	$this->zone = new Zone($name);
67	7	$this->string = Normaliser::normalise($string);
68
69	7	foreach (explode(Tokens::LINE_FEED, $this->string) as $line) {
70	7	$this->processLine($line);
71		}
72
73	5	return $this->zone;
74		}
75
76		/**
77		* @param string $line
78		*
79		* @throws ParseException
80		*/
81	7	private function processLine(string $line): void
82		{
83	7	$iterator = new \ArrayIterator(explode(Tokens::SPACE, $line));
84
85	7	if ($this->isControlEntry($iterator)) {
86	4	$this->processControlEntry($iterator);
87
88	4	return;
89		}
90
91	7	$resourceRecord = new ResourceRecord();
92
93	7	$this->processResourceName($iterator, $resourceRecord);
94	7	$this->processTtl($iterator, $resourceRecord);
95	7	$this->processClass($iterator, $resourceRecord);
96	7	$resourceRecord->setRdata($this->extractRdata($iterator));
97
98	5	$this->zone->addResourceRecord($resourceRecord);
99	5	}
100
101		/**
102		* Processes control entries at the top of a BIND record, i.e. $ORIGIN, $TTL, $INCLUDE, etc.
103		*
104		* @param \ArrayIterator $iterator
105		*/
106	4	private function processControlEntry(\ArrayIterator $iterator): void
107		{
108	4	if ('$TTL' === strtoupper($iterator->current())) {
109	4	$iterator->next();
110	4	$this->zone->setDefaultTtl((int) $iterator->current());
111		}
112	4	}
113
114		/**
115		* Processes a ResourceRecord name.
116		*
117		* @param \ArrayIterator $iterator
118		* @param ResourceRecord $resourceRecord
119		*/
120	7	private function processResourceName(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
121		{
122	7	if ($this->isResourceName($iterator)) {
123	7	$this->previousName = $iterator->current();
124	7	$iterator->next();
125		}
126
127	7	$resourceRecord->setName($this->previousName);
128	7	}
129
130		/**
131		* Set RR's TTL if there is one.
132		*
133		* @param \ArrayIterator $iterator
134		* @param ResourceRecord $resourceRecord
135		*/
136	7	private function processTtl(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
137		{
138	7	if ($this->isTTL($iterator)) {
139	4	$resourceRecord->setTtl($iterator->current());
140	4	$iterator->next();
141		}
142	7	}
143
144		/**
145		* Set RR's class if there is one.
146		*
147		* @param \ArrayIterator $iterator
148		* @param ResourceRecord $resourceRecord
149		*/
150	7	private function processClass(\ArrayIterator $iterator, ResourceRecord $resourceRecord): void
151		{
152	7	if (Classes::isValid(strtoupper($iterator->current()))) {
153	6	$resourceRecord->setClass(strtoupper($iterator->current()));
154	6	$iterator->next();
155		}
156	7	}
157
158		/**
159		* Determine if iterant is a resource name.
160		*
161		* @param \ArrayIterator $iterator
162		*
163		* @return bool
164		*/
165	7	private function isResourceName(\ArrayIterator $iterator): bool
166		{
167		return !(
168	7	$this->isTTL($iterator) \|\|
169	7	Classes::isValid(strtoupper($iterator->current())) \|\|
170	7	RDataTypes::isValid(strtoupper($iterator->current()))
171		);
172		}
173
174		/**
175		* Determine if iterant is a control entry such as $TTL, $ORIGIN, $INCLUDE, etcetera.
176		*
177		* @param \ArrayIterator $iterator
178		*
179		* @return bool
180		*/
181	7	private function isControlEntry(\ArrayIterator $iterator): bool
182		{
183	7	return 1 === preg_match('/^\$[A-Z0-9]+/i', $iterator->current());
184		}
185
186		/**
187		* Determine if the iterant is a TTL (i.e. it is an integer).
188		*
189		* @param \ArrayIterator $iterator
190		*
191		* @return bool
192		*/
193	7	private function isTTL(\ArrayIterator $iterator): bool
194		{
195	7	return 1 === preg_match('/^\d+$/', $iterator->current());
196		}
197
198		/**
199		* @param \ArrayIterator $iterator
200		*
201		* @return RData\RDataInterface
202		*
203		* @throws ParseException
204		*/
205	7	private function extractRdata(\ArrayIterator $iterator): Rdata\RdataInterface
206		{
207	7	$type = strtoupper($iterator->current());
208	7	$iterator->next();
209
210	7	if (array_key_exists($type, $this->rdataHandlers)) {
211	6	return call_user_func($this->rdataHandlers[$type], $iterator);
212		}
213
214	5	return RdataHandlers::catchAll($type, $iterator);
215		}
216		}
217

Badcow / DNS-Parser

Push — master ( 57eb77...af9a70 )

Parser::pop() A

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