NatePage\EasyHtmlElement\HtmlElement

Complexity

Total Complexity

49

Size/Duplication

Total Lines	395
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	9

Importance

Changes

0

20 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	10	3
B	__callStatic()	0	19	5
A	create()	0	13	2
A	getMap()	0	4	1
A	setMap()	0	6	1
A	addManyToMap()	0	8	2
A	addOneToMap()	0	6	1
A	getBranchValidator()	0	4	1
A	setBranchValidator()	0	6	1
A	getEscaper()	0	4	1
A	setEscaper()	0	6	1
A	load()	0	12	2
B	getInstance()	0	34	4
B	resolveElement()	0	31	6
A	alreadyResolved()	0	4	1
A	exists()	0	4	1
A	getCurrentElement()	0	21	4
B	replaceParameters()	0	18	5
A	extendElement()	0	8	1
B	extendAttributes()	0	14	6

<?php

namespace NatePage\EasyHtmlElement;

use NatePage\EasyHtmlElement\Exception\InvalidArgumentsNumberException;
use NatePage\EasyHtmlElement\Exception\InvalidElementException;
use NatePage\EasyHtmlElement\Exception\UndefinedElementException;

class HtmlElement implements HtmlElementInterface
{
    /** @var array */
    private $map;

    /** @var EscaperInterface */
    private $escaper;

    /** @var BranchValidatorInterface */
    private $branchValidator;

    /** @var array The already resolved elements */
    private $resolved = array();

    /** @var array The default values of element options */
    private $defaults = array(
        'parent' => null,
        'children' => array(),
        'extends' => array(),
        'attr' => array(),
        'text' => null,
        'type' => null,
        'class' => Element::class
    );

    /** @var array The mergeable attributes */
    private $mergeableAttributes = array('class', 'style');

    /**
     * HtmlElement constructor.
     *
     * @param array                         $map             The elements map
     * @param BranchValidatorInterface|null $branchValidator The branch validator
     * @param EscaperInterface|null         $escaper         The escaper, by default ZendFramework/Escaper is used
     * @param string                        $encoding        The encoding used for escaping, by default utf-8 is used
     */
    public function __construct(
        array $map = array(),
        BranchValidatorInterface $branchValidator = null,
        EscaperInterface $escaper = null,
        $encoding = 'utf-8')
    {
        $this->map = $map;
        $this->branchValidator = null !== $branchValidator ? $branchValidator : new BranchValidator($this);
        $this->escaper = null !== $escaper ? $escaper : new Escaper($encoding);
    }

    /**
     * Create element on static calls.
     *
     * @param string $type      The element type
     * @param array  $arguments The arguments array to set:
     *                          [0] = text (string)
     *                          [1] = attributes (array)
     *                          [2] = children (array)
     *
     * @return ElementInterface
     *
     * @throws InvalidArgumentsNumberException If the arguments length is more than 3
     */
    public static function __callStatic($type, $arguments)
    {
        switch (count($arguments)) {
            case 0:
                return self::create($type);
            case 1:
                return self::create($type, $arguments[0]);
            case 2:
                return self::create($type, $arguments[0], $arguments[1]);
            case 3:
                return self::create($type, $arguments[0], $arguments[1], $arguments[2]);
            default:
                throw new InvalidArgumentsNumberException(sprintf(
                    'Maximum numbers of arguments is %d, [%d] given.',
                    3,
                    count($arguments)
                ));
        }
    }

    /**
     * {@inheritdoc}
     */
    public static function create($type = null, $text = null, array $attributes = array(), array $children = array())
    {
        $htmlElement = new HtmlElement();
        $escaper = $htmlElement->getEscaper();

        $attributes = $escaper->escapeAttributes($attributes);

        foreach ($children as $key => $child) {
            $children[$key] = $escaper->escape($child);
        }

        return $escaper->escape(new Element($type, $text, $attributes, $children));
    }

    /**
     * {@inheritdoc}
     */
    public function getMap()
    {
        return $this->map;
    }

    /**
     * {@inheritdoc}
     */
    public function setMap(array $map)
    {
        $this->map = $map;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function addManyToMap(array $elements)
    {
        foreach ($elements as $name => $element) {
            $this->addOneToMap($name, $element);
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function addOneToMap($name, array $element)
    {
        $this->map[$name] = $element;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getBranchValidator()
    {
        return $this->branchValidator;
    }

    /**
     * {@inheritdoc}
     */
    public function setBranchValidator(BranchValidatorInterface $branchValidator)
    {
        $this->branchValidator = $branchValidator;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getEscaper()
    {
        return $this->escaper;
    }

    /**
     * {@inheritdoc}
     */
    public function setEscaper(EscaperInterface $escaper)
    {
        $this->escaper = $escaper;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function load($name, array $parameters = array(), array $attributes = array(), array $children = array())
    {
        $element = $this->getInstance($name, $parameters, true);

        $element->addAttributes($this->escaper->escapeAttributes($attributes));

        foreach ($children as $child) {
            $element->addChild($this->escaper->escape($child));
        }

        return $element;
    }

    /**
     * Get the element instance.
     *
     * @param string $name       The element name
     * @param array  $parameters The parameters to replace in element
     * @param bool   $mainCall   Determine if it's the main(first) call of the method
     *
     * @return ElementInterface
     *
     * @throws InvalidElementException If the current instance doesn't implement ElementInterface
     */
    private function getInstance($name, array $parameters, $mainCall = false)
    {
        $element = $this->resolveElement($name, $parameters, $mainCall);

        $class = $element['class'];
        $type = $element['type'];
        $text = $element['text'];
        $attributes = $element['attr'];

        $instance = new $class($type, $text, $attributes);

        if (!$instance instanceof ElementInterface) {
            throw new InvalidElementException(sprintf(
                'The element "%s" does not implement the %s',
                get_class($instance),
                ElementInterface::class
            ));
        }

        $children = array();
        foreach ((array) $element['children'] as $child) {
            $children[] = $this->getInstance($child, $parameters);
        }

        $instance->setChildren($children);

        if (null !== $element['parent']) {
            $parent = $this->getInstance($element['parent'], $parameters);

            $parent->addChild($instance);
        }

        return $this->escaper->escape($instance);
    }

    /**
     * Get the resolved element representation.
     *
     * @param string $name       The current element name
     * @param array  $parameters The parameters to replace in element
     * @param bool   $mainCall   Determine if it's the main(first) call of the method
     *
     * @return array
     */
    private function resolveElement($name, array $parameters, $mainCall = false)
    {
        $current = $this->getCurrentElement($name);

        $name = $current['name'];

        if ($this->alreadyResolved($name)) {
            return $this->resolved[$name];
        }

        if ($mainCall) {
            $this->branchValidator->validateBranch($name);
        }

        foreach ($this->defaults as $default => $value) {
            if (!isset($current[$default])) {
                $current[$default] = $value;
            }
        }

        $current = $this->replaceParameters($current, $parameters);

        foreach ((array) $current['extends'] as $extend) {
            $extend = $this->resolveElement($extend, $parameters);
            $current = $this->extendElement($extend, $current);
        }

        $this->resolved[$name] = $current;

        return $current;
    }

    /**
     * Check if an element has been already resolved.
     *
     * @param string $name
     *
     * @return bool
     */
    private function alreadyResolved($name)
    {
        return array_key_exists($name, $this->resolved);
    }

    /**
     * {@inheritdoc}
     */
    public function exists($name)
    {
        return array_key_exists(lcfirst($name), $this->map);
    }

    /**
     * Get the current element representation.
     *
     * @param string $name The element name
     *
     * @return array
     *
     * @throws InvalidElementException   If the current element is defined dynamically and doesn't define a name
     * @throws UndefinedElementException If the current element doesn't exist
     */
    public function getCurrentElement($name)
    {
        if (is_array($name)) {
            if (!isset($name['name'])) {
                throw new InvalidElementException(sprintf(
                    'Elements defined dynamically in parent or children must define a name.'
                ));
            }

            return $name;
        }

        if (!$this->exists($name)) {
            throw new UndefinedElementException(sprintf('The element with name "%s" does not exist.', $name));
        }

        $current = $this->map[lcfirst($name)];
        $current['name'] = $name;

        return $current;
    }

    /**
     * Replace the parameters of the element.
     *
     * @param array $element    The element with the parameters to replace
     * @param array $parameters The array of parameters values
     *
     * @return array
     */
    private function replaceParameters(array $element, array $parameters)
    {
        foreach ($element as $key => $value) {
            if (is_array($value)) {
                $element[$key] = $this->replaceParameters($value, $parameters);
            }

            if (is_string($value)) {
                foreach ($parameters as $parameter => $replace) {
                    $value = str_replace('%'.$parameter.'%', $replace, $value);
                }

                $element[$key] = $value;
            }
        }

        return $element;
    }

    /**
     * Extend element from another one.
     *
     * @param array $extend  The array of the element to extend
     * @param array $current The current element which extends
     *
     * @return array
     */
    private function extendElement($extend, $current)
    {
        $current['class'] = $extend['class'];

        $current['attr'] = $this->extendAttributes($extend['attr'], $current['attr']);

        return $current;
    }

    /**
     * Extend attributes from another element.
     *
     * @param array $from The array of attributes to extend
     * @param array $to   The array of attributes which extends
     *
     * @return array
     */
    private function extendAttributes(array $from, array $to)
    {
        foreach ($from as $key => $value) {
            if (in_array($key, $this->mergeableAttributes) && isset($to[$key])) {
                $to[$key] = array_merge((array) $to[$key], (array) $value);
            } elseif (!isset($to[$key])) {
                $to[$key] = $value;
            } elseif (is_array($value)) {
                $to[$key] = $this->extendAttributes($value, $to[$key]);
            }
        }

        return $to;
    }
}