DateTimeParser - Code Metrics - Inspection of "Feature: parse \DateTimeImmutable objects" - thecodingmachine/metahydrator - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — 1.x (#10)

by Dorian

created 2018-01-09 00:56 UTC

DateTimeParser A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	63
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

Metric	Value
wmc	15
lcom	1
cbo	1
dl	0
loc	63
rs	10
c	0
b	0
f	0

8 Methods

Rating	Name	Size	Complexity
A	getFormat()	1	1
A	setFormat()	1	1
A	getIgnoreWarnings()	1	1
A	setIgnoreWarnings()	1	1
A	getImmutable()	1	1
A	setImmutable()	1	1
A	__construct()	7	1
C	parse()	26	8

<?php
namespace MetaHydrator\Parser;

use MetaHydrator\Exception\ParsingException;

/**
 * An implementation of ParserInterface used to reconstruct DateTime objects from a string
 */
class DateTimeParser extends AbstractParser
{
    /** @var null|string */
    private $format;
    public function getFormat() { return $this->format; }
    public function setFormat(string $format) { $this->format = $format; }

    /** @var bool */
    private $ignoreWarnings;
    public function getIgnoreWarnings() { return $this->ignoreWarnings; }
    public function setIgnoreWarnings(bool $ignoreWarnings) { $this->ignoreWarnings = $ignoreWarnings; }

    /** @var bool */
    private $immutable;
    public function getImmutable() { return $this->immutable; }
    public function setImmutable(bool $immutable) { $this->immutable = $immutable; }

    /**
     * DateTimeParser constructor.
     * @param string|null $format
     * @param bool $ignoreWarnings
     * @param string $errorMessage
     */
    public function __construct(string $format = null, bool $ignoreWarnings = false, string $errorMessage = "", bool $immutable = false)
    {
        parent::__construct($errorMessage);
        $this->format = $format;
        $this->ignoreWarnings = $ignoreWarnings;
        $this->immutable = $immutable;
    }

    /**
     * @param mixed $rawValue
     * @return \DateTime
     * @throws ParsingException
     */
    public function parse($rawValue)
    {
        if ($rawValue === null || $rawValue === '') {
            return null;
        }

        if ($this->format) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
            $date = \DateTime::createFromFormat($this->format, $rawValue);
        } else {
            $date = new \DateTime($rawValue);
        }

        $errors = \DateTime::getLastErrors();
        if ($errors['error_count'] > 0) {
            $this->throw();
        }
        if (!$this->ignoreWarnings && $errors['warning_count'] > 0) {
            $this->throw();
        }

        if ($this->immutable) {
            $date = \DateTimeImmutable::createFromMutable($date);
        }

        return $date;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }
}


1			<?php
2			namespace MetaHydrator\Parser;
3
4			use MetaHydrator\Exception\ParsingException;
5
6			/**
7			* An implementation of ParserInterface used to reconstruct DateTime objects from a string
8			*/
9			class DateTimeParser extends AbstractParser
10			{
11			/** @var null\|string */
12			private $format;
13			public function getFormat() { return $this->format; }
14			public function setFormat(string $format) { $this->format = $format; }
15
16			/** @var bool */
17			private $ignoreWarnings;
18			public function getIgnoreWarnings() { return $this->ignoreWarnings; }
19			public function setIgnoreWarnings(bool $ignoreWarnings) { $this->ignoreWarnings = $ignoreWarnings; }
20
21			/** @var bool */
22			private $immutable;
23			public function getImmutable() { return $this->immutable; }
24			public function setImmutable(bool $immutable) { $this->immutable = $immutable; }
25
26			/**
27			* DateTimeParser constructor.
28			* @param string\|null $format
29			* @param bool $ignoreWarnings
30			* @param string $errorMessage
31			*/
32			public function __construct(string $format = null, bool $ignoreWarnings = false, string $errorMessage = "", bool $immutable = false)
33			{
34			parent::__construct($errorMessage);
35			$this->format = $format;
36			$this->ignoreWarnings = $ignoreWarnings;
37			$this->immutable = $immutable;
38			}
39
40			/**
41			* @param mixed $rawValue
42			* @return \DateTime
43			* @throws ParsingException
44			*/
45			public function parse($rawValue)
46			{
47			if ($rawValue === null \|\| $rawValue === '') {
48			return null;
49			}
50
51			if ($this->format) {
			0 ignored issues – show Bug Best Practice introduced 2017-06-27 16:31 UTC by Report Bug Copy Issue Report The expression `$this->format` of type `null\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
52			$date = \DateTime::createFromFormat($this->format, $rawValue);
53			} else {
54			$date = new \DateTime($rawValue);
55			}
56
57			$errors = \DateTime::getLastErrors();
58			if ($errors['error_count'] > 0) {
59			$this->throw();
60			}
61			if (!$this->ignoreWarnings && $errors['warning_count'] > 0) {
62			$this->throw();
63			}
64
65			if ($this->immutable) {
66			$date = \DateTimeImmutable::createFromMutable($date);
67			}
68
69			return $date;
			0 ignored issues – show Bug Best Practice introduced 2018-01-09 00:57 UTC by Report Bug Copy Issue Report The return type of `return $date;` (`DateTime\|false\|DateTimeImmutable`) is incompatible with the return type documented by `MetaHydrator\Parser\DateTimeParser::parse` of type `DateTime\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
70			}
71			}
72

thecodingmachine / metahydrator

Pull Request — 1.x (#10)

DateTimeParser A

Complexity

Size/Duplication

Coupling/Cohesion

Importance

8 Methods

Duplication Side-by-Side

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