UserFormsCompositeField::processNext() - Code Metrics - Inspection of "API Upgrade for SS4 compatibility" - silverstripe/silverstripe-userforms - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#647)

by Robbie

created 2017-08-16 01:51 UTC

UserFormsCompositeField::processNext() B

↳ Parent: UserFormsCompositeField

Complexity

Conditions	5
Paths	4

Size

Total Lines	25
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	25
rs	8.439
c	0
b	0
f	0
cc	5
eloc	10
nc	4
nop	1

<?php

namespace SilverStripe\UserForms\FormField;

use SilverStripe\Forms\CompositeField;
use SilverStripe\UserForms\Model\EditableFormField;
use SilverStripe\UserForms\Model\EditableFormField\EditableFormStep;

/**
 * Represents a composite field group, which may contain other groups
 */
abstract class UserFormsCompositeField extends CompositeField implements UserFormsFieldContainer
{
    /**
     * Parent field
     *
     * @var UserFormsFieldContainer
     */
    protected $parent = null;

    public function getParent()
    {
        return $this->parent;
    }

    public function setParent(UserFormsFieldContainer $parent)
    {
        $this->parent = $parent;
        return $this;
    }

    public function processNext(EditableFormField $field)
    {
        // When we find a step, bubble up to the top
        if ($field instanceof EditableFormStep) {
            return $this->getParent()->processNext($field);
        }

        // Skip over fields that don't generate formfields
        if (get_class($field) === EditableFormField::class || !$field->getFormField()) {
            return $this;
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());
}
        }
        /** @var EditableFormField $formField */
        $formField = $field->getFormField();

        // Save this field
        $this->push($formField);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

        // Nest fields that are containers
        if ($formField instanceof UserFormsFieldContainer) {
            return $formField->setParent($this);
        }

        // Add any subsequent fields to this
        return $this;
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
3			namespace SilverStripe\UserForms\FormField;
4
5			use SilverStripe\Forms\CompositeField;
6			use SilverStripe\UserForms\Model\EditableFormField;
7			use SilverStripe\UserForms\Model\EditableFormField\EditableFormStep;
8
9			/**
10			* Represents a composite field group, which may contain other groups
11			*/
12			abstract class UserFormsCompositeField extends CompositeField implements UserFormsFieldContainer
13			{
14			/**
15			* Parent field
16			*
17			* @var UserFormsFieldContainer
18			*/
19			protected $parent = null;
20
21			public function getParent()
22			{
23			return $this->parent;
24			}
25
26			public function setParent(UserFormsFieldContainer $parent)
27			{
28			$this->parent = $parent;
29			return $this;
30			}
31
32			public function processNext(EditableFormField $field)
33			{
34			// When we find a step, bubble up to the top
35			if ($field instanceof EditableFormStep) {
36			return $this->getParent()->processNext($field);
37			}
38
39			// Skip over fields that don't generate formfields
40			if (get_class($field) === EditableFormField::class \|\| !$field->getFormField()) {
41			return $this;
			0 ignored issues – show Bug Best Practice introduced 2017-08-16 02:04 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`SilverStripe\UserForms\F...UserFormsCompositeField`) is incompatible with the return type declared by the interface `SilverStripe\UserForms\F...dContainer::processNext` of type `SilverStripe\UserForms\F...\EditableContainerField`. 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...
42			}
43			/** @var EditableFormField $formField */
44			$formField = $field->getFormField();
45
46			// Save this field
47			$this->push($formField);
			0 ignored issues – show Documentation introduced 2017-08-16 02:04 UTC by Report Bug Copy Issue Report `$formField` is of type `object<SilverStripe\User...odel\EditableFormField>`, but the function expects a `object<SilverStripe\Forms\FormField>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
48
49			// Nest fields that are containers
50			if ($formField instanceof UserFormsFieldContainer) {
51			return $formField->setParent($this);
52			}
53
54			// Add any subsequent fields to this
55			return $this;
			0 ignored issues – show Bug Best Practice introduced 2017-08-16 02:04 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`SilverStripe\UserForms\F...UserFormsCompositeField`) is incompatible with the return type declared by the interface `SilverStripe\UserForms\F...dContainer::processNext` of type `SilverStripe\UserForms\F...\EditableContainerField`. 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...
56			}
57			}
58

silverstripe / silverstripe-userforms

Pull Request — master (#647)

UserFormsCompositeField::processNext() B

Complexity

Size

Duplication

Importance

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