Form::get_component() - Code Metrics - Inspection of "Fixed an error involving components with no name a..." - amarkal/amarkal-ui - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 7abe43...7deb80 )

by Askupa

created 2017-07-29 19:31 UTC

Form::get_component() A

↳ Parent: Form

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	8
Ratio	100 %

Importance

Changes

Metric	Value
cc	2
eloc	4
nc	2
nop	1
dl	8
loc	8
rs	9.4285
c	0
b	0
f	0

<?php

namespace Amarkal\UI;

/**
 * Implements a Form controller.
 * 
 * The form object is used to encapsulate UI components and the update/validation 
 * process into a single entity.
 */
class Form
{
    /**
     * The list of AbstractComponent type objects to be updated.
     * 
     * @var AbstractComponent[] objects array.
     */
    private $component_list;
    
    /**
     * The old component values array. These values are used if the new values
     * are invalid.
     * Structure: component_name => component_value
     * 
     * @var array Old values array.
     */
    private $old_instance;
    
    /**
     * The new component values array.
     * Structure: component_name => component_value
     * 
     * @var array New values array.
     */
    private $new_instance;
    
    /**
     * The final values array, after filtering and validation.
     * This is returned by the update function.
     * Structure: component_name => component_value
     * 
     * @var array Final values array. 
     */
    private $final_instance = array();
    
    /**
     * Array of names of components that were invalid, and the error message 
     * recieved.
     * Structure: component_name => error_message
     * 
     * @var string[] Array of error messages. 
     */
    private $errors = array();
    
    /**
     * When instantiating a form, a list of component arguments arrays must be 
     * provided. Each arguments array must have a 'type' argument, in addition 
     * to the component's original arguments.
     * 
     * @param ComponentList $component_list
     */
    public function __construct( ComponentList $component_list = null )
    {
        if(null === $component_list)
        {
            $component_list = new ComponentList();
        }
        $this->component_list = $component_list;

    }
    
    /**
     * Get the updated component values (validated, filtered or ignored).
     * 
     * Loops through each component and acts according to its type:
     * - Disableable components are ignored if they are disabled.
     * - Validatable components are validated using their validation function. 
     *   If the new value is invalid, the old value will be used.
     * - Filterable components are filtered using their filter function.
     * - Non-value components are skipped altogether.
     * 
     * Each component is also set with its new value.
     * 
     * @param array $new_instance The new component values array.
     * @param array $old_instance The old component values array.
     * 
     * @return array The updated values array.
     */
    public function update( array $new_instance = array(), array $old_instance = array() )
    {
        $this->old_instance   = array_merge($this->get_defaults(),$old_instance);
        $this->new_instance   = array_merge($this->old_instance,$new_instance);
        $this->final_instance = $this->new_instance;
        
        foreach ( $this->component_list->get_value_components() as $component ) 

        {
            // Update individual fields, as well as the composite parent field.
            $this->update_component( $component );
        }
        
        return $this->final_instance;
    }
    
    /**
     * Reset all fields to their default values.
     * 
     * @return array The updated values array.
     */
    public function reset()
    {
        foreach( $this->component_list->get_value_components() as $c )

        {
            $c->value = $c->default;
            $this->final_instance[$c->name] = $c->default;
        }
        return $this->final_instance;
    }
    
    /**
     * Get the list of error messages for components that could not be validated.
     * Structure: components_name => error_message
     * 
     * @return string[] Array of error messages. 
     */
    public function get_errors()
    {
        return $this->errors;
    }
    
    /**
     * Get all components.
     * 
     * @return array
     */
    public function get_component_list()
    {
        return $this->component_list;
    }
    
    /**
     * Update the component's value with the new value.
     * NOTE: this function also updates the $final_instance
     * array.
     * 
     * @param ValueComponentInterface $component The component to validate.
     */
    private function update_component( ValueComponentInterface $component )
    {
        $component->value = $this->final_instance[$component->name];
interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}
        
        // Skip if this field is disabled
        if( $this->is_disabled($component) )
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

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

        // Apply user-defined filter
        $this->filter( $component );
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
        
        // Validate value
        $this->validate( $component );
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
    }
    
    /**
     * Check if the given component is disabled.
     * 
     * @param UI\AbstractComponent $component
     * @return boolean
     */
    private function is_disabled( $component )
    {
        return 
            $component instanceof DisableableComponentInterface &&
            (
                true === $component->disabled ||
                true === $component->readonly
            );
    }

    /**
     * Filter the component's value using its filter function (if applicable)
     * 
     * @param UI\AbstractComponent $component
     */
    private function filter( $component )
    {
        if( $component instanceof FilterableComponentInterface )
        {
            $filter = $component->filter;

            if( is_callable( $filter ) ) 
            {
                $component->value = \call_user_func_array($filter, array($this->final_instance[$component->name]));
                $this->final_instance[$component->name] = $component->value;
            }
        }
    }
    
    /**
     * Validate the component's value using its validation function.
     * 
     * If the value is invalid, the old value is used, and an error message is
     * saved into the errors array as component_name => error_message.
     * 
     * @param UI\AbstractComponent $component The component to validate.
     */
    private function validate( $component )
    {
        if( !($component instanceof ValidatableComponentInterface) ) return;
        
        $name     = $component->name;
        $validate = $component->validation;
        
        $component->validity = $component::VALID;
        
        if(is_callable($validate))
        {
            $error = '';
            $valid = \call_user_func_array($validate, array($this->final_instance[$name], &$error));
            
            // Invalid input, use old instance or default value
            if ( true !== $valid ) 
            {
                $this->errors[$name]         = $error ? $error : ValidatableComponentInterface::DEFAULT_MESSAGE;
                $component->value            = $this->old_instance[$name];
                $this->final_instance[$name] = $this->old_instance[$name];
                $component->set_validity($component::INVALID);
            }
        }
    }
    
    /**
     * Get the default values for all form components as an array of name => default_value
     * 
     * @return array
     */
    private function get_defaults()
    {
        $defaults = array();
        
        foreach( $this->component_list->get_value_components() as $component )

        {
            $defaults[$component->name] = $component->default;
        }
        
        return $defaults;
    }
}

Push — master ( 7abe43...7deb80 )

Form::get_component() A

Complexity

Size

Duplication

Importance

Available Fixes

Available Fixes

1			<?php
2
3			namespace Amarkal\UI;
4
5			/**
6			* Implements a Form controller.
7			*
8			* The form object is used to encapsulate UI components and the update/validation
9			* process into a single entity.
10			*/
11			class Form
12			{
13			/**
14			* The list of AbstractComponent type objects to be updated.
15			*
16			* @var AbstractComponent[] objects array.
17			*/
18			private $component_list;
19
20			/**
21			* The old component values array. These values are used if the new values
22			* are invalid.
23			* Structure: component_name => component_value
24			*
25			* @var array Old values array.
26			*/
27			private $old_instance;
28
29			/**
30			* The new component values array.
31			* Structure: component_name => component_value
32			*
33			* @var array New values array.
34			*/
35			private $new_instance;
36
37			/**
38			* The final values array, after filtering and validation.
39			* This is returned by the update function.
40			* Structure: component_name => component_value
41			*
42			* @var array Final values array.
43			*/
44			private $final_instance = array();
45
46			/**
47			* Array of names of components that were invalid, and the error message
48			* recieved.
49			* Structure: component_name => error_message
50			*
51			* @var string[] Array of error messages.
52			*/
53			private $errors = array();
54
55			/**
56			* When instantiating a form, a list of component arguments arrays must be
57			* provided. Each arguments array must have a 'type' argument, in addition
58			* to the component's original arguments.
59			*
60			* @param ComponentList $component_list
61			*/
62			public function __construct( ComponentList $component_list = null )
63			{
64			if(null === $component_list)
65			{
66			$component_list = new ComponentList();
67			}
68			$this->component_list = $component_list;
			0 ignored issues – show Documentation Bug introduced 2017-07-29 19:33 UTC by Report Bug Copy Issue Report It seems like `$component_list` of type `object<Amarkal\UI\ComponentList>` is incompatible with the declared type `array<integer,object<Ama...\UI\AbstractComponent>>` of property `$component_list`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
69			}
70
71			/**
72			* Get the updated component values (validated, filtered or ignored).
73			*
74			* Loops through each component and acts according to its type:
75			* - Disableable components are ignored if they are disabled.
76			* - Validatable components are validated using their validation function.
77			* If the new value is invalid, the old value will be used.
78			* - Filterable components are filtered using their filter function.
79			* - Non-value components are skipped altogether.
80			*
81			* Each component is also set with its new value.
82			*
83			* @param array $new_instance The new component values array.
84			* @param array $old_instance The old component values array.
85			*
86			* @return array The updated values array.
87			*/
88			public function update( array $new_instance = array(), array $old_instance = array() )
89			{
90			$this->old_instance = array_merge($this->get_defaults(),$old_instance);
91			$this->new_instance = array_merge($this->old_instance,$new_instance);
92			$this->final_instance = $this->new_instance;
93
94			foreach ( $this->component_list->get_value_components() as $component )
			0 ignored issues – show Bug introduced 2017-07-29 19:33 UTC by Report Bug Copy Issue Report The method `get_value_components` cannot be called on `$this->component_list` (of type `array<integer,object<Ama...\UI\AbstractComponent>>`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
95			{
96			// Update individual fields, as well as the composite parent field.
97			$this->update_component( $component );
98			}
99
100			return $this->final_instance;
101			}
102
103			/**
104			* Reset all fields to their default values.
105			*
106			* @return array The updated values array.
107			*/
108			public function reset()
109			{
110			foreach( $this->component_list->get_value_components() as $c )
			0 ignored issues – show Bug introduced 2017-07-29 19:33 UTC by Report Bug Copy Issue Report The method `get_value_components` cannot be called on `$this->component_list` (of type `array<integer,object<Ama...\UI\AbstractComponent>>`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
111			{
112			$c->value = $c->default;
113			$this->final_instance[$c->name] = $c->default;
114			}
115			return $this->final_instance;
116			}
117
118			/**
119			* Get the list of error messages for components that could not be validated.
120			* Structure: components_name => error_message
121			*
122			* @return string[] Array of error messages.
123			*/
124			public function get_errors()
125			{
126			return $this->errors;
127			}
128
129			/**
130			* Get all components.
131			*
132			* @return array
133			*/
134			public function get_component_list()
135			{
136			return $this->component_list;
137			}
138
139			/**
140			* Update the component's value with the new value.
141			* NOTE: this function also updates the $final_instance
142			* array.
143			*
144			* @param ValueComponentInterface $component The component to validate.
145			*/
146			private function update_component( ValueComponentInterface $component )
147			{
148			$component->value = $this->final_instance[$component->name];
			0 ignored issues – show Bug introduced 2017-04-05 13:47 UTC by Report Bug Copy Issue Report Accessing `value` on the interface `Amarkal\UI\ValueComponentInterface` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history... Bug introduced 2017-04-05 13:47 UTC by Report Bug Copy Issue Report Accessing `name` on the interface `Amarkal\UI\ValueComponentInterface` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history...
149
150			// Skip if this field is disabled
151			if( $this->is_disabled($component) )
			0 ignored issues – show Documentation introduced 2017-04-07 21:59 UTC by Report Bug Copy Issue Report `$component` is of type `object<Amarkal\UI\ValueComponentInterface>`, but the function expects a `object<Amarkal\UI\UI\AbstractComponent>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
152			{
153			return;
154			}
155
156			// Apply user-defined filter
157			$this->filter( $component );
			0 ignored issues – show Documentation introduced 2017-04-07 21:59 UTC by Report Bug Copy Issue Report `$component` is of type `object<Amarkal\UI\ValueComponentInterface>`, but the function expects a `object<Amarkal\UI\UI\AbstractComponent>`. 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...
158
159			// Validate value
160			$this->validate( $component );
			0 ignored issues – show Documentation introduced 2017-04-07 21:59 UTC by Report Bug Copy Issue Report `$component` is of type `object<Amarkal\UI\ValueComponentInterface>`, but the function expects a `object<Amarkal\UI\UI\AbstractComponent>`. 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...
161			}
162
163			/**
164			* Check if the given component is disabled.
165			*
166			* @param UI\AbstractComponent $component
167			* @return boolean
168			*/
169			private function is_disabled( $component )
170			{
171			return
172			$component instanceof DisableableComponentInterface &&
173			(
174			true === $component->disabled \|\|
175			true === $component->readonly
176			);
177			}
178
179			/**
180			* Filter the component's value using its filter function (if applicable)
181			*
182			* @param UI\AbstractComponent $component
183			*/
184			private function filter( $component )
185			{
186			if( $component instanceof FilterableComponentInterface )
187			{
188			$filter = $component->filter;
189
190			if( is_callable( $filter ) )
191			{
192			$component->value = \call_user_func_array($filter, array($this->final_instance[$component->name]));
193			$this->final_instance[$component->name] = $component->value;
194			}
195			}
196			}
197
198			/**
199			* Validate the component's value using its validation function.
200			*
201			* If the value is invalid, the old value is used, and an error message is
202			* saved into the errors array as component_name => error_message.
203			*
204			* @param UI\AbstractComponent $component The component to validate.
205			*/
206			private function validate( $component )
207			{
208			if( !($component instanceof ValidatableComponentInterface) ) return;
209
210			$name = $component->name;
211			$validate = $component->validation;
212
213			$component->validity = $component::VALID;
214
215			if(is_callable($validate))
216			{
217			$error = '';
218			$valid = \call_user_func_array($validate, array($this->final_instance[$name], &$error));
219
220			// Invalid input, use old instance or default value
221			if ( true !== $valid )
222			{
223			$this->errors[$name] = $error ? $error : ValidatableComponentInterface::DEFAULT_MESSAGE;
224			$component->value = $this->old_instance[$name];
225			$this->final_instance[$name] = $this->old_instance[$name];
226			$component->set_validity($component::INVALID);
227			}
228			}
229			}
230
231			/**
232			* Get the default values for all form components as an array of name => default_value
233			*
234			* @return array
235			*/
236			private function get_defaults()
237			{
238			$defaults = array();
239
240			foreach( $this->component_list->get_value_components() as $component )
			0 ignored issues – show Bug introduced 2017-07-29 19:33 UTC by Report Bug Copy Issue Report The method `get_value_components` cannot be called on `$this->component_list` (of type `array<integer,object<Ama...\UI\AbstractComponent>>`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
241			{
242			$defaults[$component->name] = $component->default;
243			}
244
245			return $defaults;
246			}
247			}

amarkal / amarkal-ui

Push — master ( 7abe43...7deb80 )

Form::get_component() A

Complexity

Size

Duplication

Importance

Available Fixes

Available Fixes

Duplication Side-by-Side

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