BuildTypeFromEtcRedhatRelease::from() - Code Metrics - Inspection of "Tweak: further reduce complexity to satisfy the Sc..." - ganbarodigital/php-operating-system - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Stuart

created 2016-01-15 14:36 UTC

BuildTypeFromEtcRedhatRelease::from() A

↳ Parent: BuildTypeFromEtcRedhatRelease

Complexity

Conditions	2
Paths	2

Size

Total Lines	16
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	1	Features	0

Metric	Value
c	4
b	1
f	0
dl	0
loc	16
rs	9.4285
cc	2
eloc	6
nc	2
nop	1

<?php

/**
 * Copyright (c) 2015-present Ganbaro Digital Ltd
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the names of the copyright holders nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @category  Libraries
 * @package   OperatingSystem/OsType/ValueBuilders
 * @author    Stuart Herbert <[email protected]>
 * @copyright 2015-present Ganbaro Digital Ltd www.ganbarodigital.com
 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @link      http://code.ganbarodigital.com/php-text-tools
 */

namespace GanbaroDigital\OperatingSystem\OsType\ValueBuilders;

use GanbaroDigital\Filesystem\Requirements\RequireReadableFile;
use GanbaroDigital\OperatingSystem\OsType\Checks\HasEtcRedhatRelease;
use GanbaroDigital\OperatingSystem\OsType\Values\CentOS;
use GanbaroDigital\OperatingSystem\OsType\Values\OsType;

class BuildTypeFromEtcRedhatRelease
{
    /**
     * use /etc/redhat-release (if it exists) to work out what flavour of
     * RedHat Linux we are looking at
     *
     * @param  string $path
     *         path to the file to parse
     * @return null|OsType

     *         OsType if we can determine the operating system
     *         null if we cannot
     */
    public function __invoke($path = '/etc/redhat-release')
    {
        return self::from($path);
    }

    /**
     * use /etc/redhat-release (if it exists) to work out what flavour of
     * RedHat Linux we are looking at
     *
     * @return null|OsType

     *         OsType if we can determine the operating system
     *         null if we cannot
     */
    public function inDefaultLocation()
    {
        return self::from('/etc/redhat-release');
    }

    /**
     * use /etc/redhat-release (if it exists) to work out what flavour of
     * RedHat Linux we are looking at
     *
     * @param  string $path
     *         path to the file to parse
     * @return null|OsType

     *         OsType if we can determine the operating system
     *         null if we cannot
     */
    public static function from($path)
    {
        // make sure we have the file!
        if (!HasEtcRedhatRelease::check($path)) {
            return null;
        }

        // make sure the file is readable
        RequireReadableFile::check($path);

        // what do we have?
        $fileContents = file_get_contents($path);

        // do we have a match?
        return self::matchContentsToType($fileContents);
    }

    /**
     * do we have a regex that matches the contents of our file?
     *
     * @param  string $fileContents
     *         the contents of the file to check
     * @return null|OsType

     *         OsType if we can determine the operating system
     *         null if we cannot
     */
    private static function matchContentsToType($fileContents)
    {
        foreach (self::$osTypes as $regex => $type) {
            if ($result = self::matchTypeToRegex($type, $regex, $fileContents)) {
                return $result;
            }
        }

        return null;
    }

    /**
     * does the given regex match our file
     *
     * @param  string $type
     *         the OsType class to return if the regex matches
     * @param  string $regex
     *         the regex to try
     * @param  string $fileContents
     *         the text that we apply the regex to
     * @return null|OsType

     *         OsType if the regex matches
     *         null otherwise
     */
    private static function matchTypeToRegex($type, $regex, $fileContents)
    {
        $matches=[];
        if (!preg_match($regex, $fileContents, $matches)) {
            return null;
        }

        // if we get here, we have a match
        /** @var OsType a type of operating system */
        $osType = new $type($matches['version']);
        return $osType;

    }

    /**
     * a map of regexes to OsType classes
     *
     * @var array
     */
    private static $osTypes = [
        "|^CentOS release (?<version>\d+\.\d+)|" => CentOS::class,
        "|^CentOS Linux release (?<version>\d+\.\d+)|" => CentOS::class,
    ];
}

1			<?php
2
3			/**
4			* Copyright (c) 2015-present Ganbaro Digital Ltd
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			*
11			* * Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			*
14			* * Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in
16			* the documentation and/or other materials provided with the
17			* distribution.
18			*
19			* * Neither the names of the copyright holders nor the names of his
20			* contributors may be used to endorse or promote products derived
21			* from this software without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24			* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26			* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27			* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
28			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
29			* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
31			* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
33			* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34			* POSSIBILITY OF SUCH DAMAGE.
35			*
36			* @category Libraries
37			* @package OperatingSystem/OsType/ValueBuilders
38			* @author Stuart Herbert <[email protected]>
39			* @copyright 2015-present Ganbaro Digital Ltd www.ganbarodigital.com
40			* @license http://www.opensource.org/licenses/bsd-license.php BSD License
41			* @link http://code.ganbarodigital.com/php-text-tools
42			*/
43
44			namespace GanbaroDigital\OperatingSystem\OsType\ValueBuilders;
45
46			use GanbaroDigital\Filesystem\Requirements\RequireReadableFile;
47			use GanbaroDigital\OperatingSystem\OsType\Checks\HasEtcRedhatRelease;
48			use GanbaroDigital\OperatingSystem\OsType\Values\CentOS;
49			use GanbaroDigital\OperatingSystem\OsType\Values\OsType;
50
51			class BuildTypeFromEtcRedhatRelease
52			{
53			/**
54			* use /etc/redhat-release (if it exists) to work out what flavour of
55			* RedHat Linux we are looking at
56			*
57			* @param string $path
58			* path to the file to parse
59			* @return null\|OsType
			0 ignored issues – show Documentation introduced 2016-01-15 14:12 UTC by Report Bug Copy Issue Report Should the return type not be `null\|object`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
60			* OsType if we can determine the operating system
61			* null if we cannot
62			*/
63			public function __invoke($path = '/etc/redhat-release')
64			{
65			return self::from($path);
66			}
67
68			/**
69			* use /etc/redhat-release (if it exists) to work out what flavour of
70			* RedHat Linux we are looking at
71			*
72			* @return null\|OsType
			0 ignored issues – show Documentation introduced 2016-01-15 14:12 UTC by Report Bug Copy Issue Report Should the return type not be `null\|object`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
73			* OsType if we can determine the operating system
74			* null if we cannot
75			*/
76			public function inDefaultLocation()
77			{
78			return self::from('/etc/redhat-release');
79			}
80
81			/**
82			* use /etc/redhat-release (if it exists) to work out what flavour of
83			* RedHat Linux we are looking at
84			*
85			* @param string $path
86			* path to the file to parse
87			* @return null\|OsType
			0 ignored issues – show Documentation introduced 2016-01-15 14:12 UTC by Report Bug Copy Issue Report Should the return type not be `null\|object`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
88			* OsType if we can determine the operating system
89			* null if we cannot
90			*/
91			public static function from($path)
92			{
93			// make sure we have the file!
94			if (!HasEtcRedhatRelease::check($path)) {
95			return null;
96			}
97
98			// make sure the file is readable
99			RequireReadableFile::check($path);
100
101			// what do we have?
102			$fileContents = file_get_contents($path);
103
104			// do we have a match?
105			return self::matchContentsToType($fileContents);
106			}
107
108			/**
109			* do we have a regex that matches the contents of our file?
110			*
111			* @param string $fileContents
112			* the contents of the file to check
113			* @return null\|OsType
			0 ignored issues – show Documentation introduced 2016-01-15 14:39 UTC by Report Bug Copy Issue Report Should the return type not be `object\|null`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
114			* OsType if we can determine the operating system
115			* null if we cannot
116			*/
117			private static function matchContentsToType($fileContents)
118			{
119			foreach (self::$osTypes as $regex => $type) {
120			if ($result = self::matchTypeToRegex($type, $regex, $fileContents)) {
121			return $result;
122			}
123			}
124
125			return null;
126			}
127
128			/**
129			* does the given regex match our file
130			*
131			* @param string $type
132			* the OsType class to return if the regex matches
133			* @param string $regex
134			* the regex to try
135			* @param string $fileContents
136			* the text that we apply the regex to
137			* @return null\|OsType
			0 ignored issues – show Documentation introduced 2016-01-15 14:27 UTC by Report Bug Copy Issue Report Should the return type not be `null\|object`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
138			* OsType if the regex matches
139			* null otherwise
140			*/
141			private static function matchTypeToRegex($type, $regex, $fileContents)
142			{
143			$matches=[];
144			if (!preg_match($regex, $fileContents, $matches)) {
145			return null;
146			}
147
148			// if we get here, we have a match
149			/** @var OsType a type of operating system */
150			$osType = new $type($matches['version']);
151			return $osType;
152
153			}
154
155			/**
156			* a map of regexes to OsType classes
157			*
158			* @var array
159			*/
160			private static $osTypes = [
161			"\|^CentOS release (?<version>\d+\.\d+)\|" => CentOS::class,
162			"\|^CentOS Linux release (?<version>\d+\.\d+)\|" => CentOS::class,
163			];
164			}

ganbarodigital / php-operating-system

Push — develop ( d96df9...2df89c )

BuildTypeFromEtcRedhatRelease::from() A

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