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Filename : ActionButton.php
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<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Button;

use Joomla\CMS\Language\Text;
use Joomla\CMS\Layout\FileLayout;
use Joomla\CMS\Layout\LayoutHelper;
use Joomla\Registry\Registry;
use Joomla\Utilities\ArrayHelper;

/**
 * The TaskButton class.
 *
 * @since  4.0.0
 */
class ActionButton
{
    /**
     * The button states profiles.
     *
     * @var  array
     *
     * @since  4.0.0
     */
    protected $states = [];

    /**
     * Default options for unknown state.
     *
     * @var  array
     *
     * @since  4.0.0
     */
    protected $unknownState = [
        'value'   => null,
        'task'    => '',
        'icon'    => 'question',
        'title'   => 'Unknown state',
        'options' => [
            'disabled'  => false,
            'only_icon' => false,
            'tip' => true,
            'tip_title' => '',
            'task_prefix' => '',
            'checkbox_name' => 'cb',
        ],
    ];

    /**
     * Options of this button set.
     *
     * @var  Registry
     *
     * @since  4.0.0
     */
    protected $options;

    /**
     * The layout path to render.
     *
     * @var  string
     *
     * @since  4.0.0
     */
    protected $layout = 'joomla.button.action-button';

    /**
     * ActionButton constructor.
     *
     * @param   array  $options  The options for all buttons in this group.
     *
     * @since   4.0.0
     */
    public function __construct(array $options = [])
    {
        $this->options = new Registry($options);

        // Replace some dynamic values
        $this->unknownState['title'] = Text::_('JLIB_HTML_UNKNOWN_STATE');

        $this->preprocess();
    }

    /**
     * Configure this object.
     *
     * @return  void
     *
     * @since   4.0.0
     */
    protected function preprocess()
    {
        // Implement this method.
    }

    /**
     * Add a state profile.
     *
     * @param   integer  $value    The value of this state.
     * @param   string   $task     The task you want to execute after click this button.
     * @param   string   $icon     The icon to display for user.
     * @param   string   $title    Title text will show if we enable tooltips.
     * @param   array    $options  The button options, will override group options.
     *
     * @return  static  Return self to support chaining.
     *
     * @since   4.0.0
     */
    public function addState(int $value, string $task, string $icon = 'ok', string $title = '', array $options = []): self
    {
        // Force type to prevent null data
        $this->states[$value] = [
            'value'   => $value,
            'task'    => $task,
            'icon'    => $icon,
            'title'   => $title,
            'options' => $options
        ];

        return $this;
    }

    /**
     * Get state profile by value name.
     *
     * @param   integer  $value  The value name we want to get.
     *
     * @return  array|null  Return state profile or NULL.
     *
     * @since   4.0.0
     */
    public function getState(int $value): ?array
    {
        return $this->states[$value] ?? null;
    }

    /**
     * Remove a state by value name.
     *
     * @param   integer  $value  Remove state by this value.
     *
     * @return  static  Return to support chaining.
     *
     * @since   4.0.0
     */
    public function removeState(int $value): self
    {
        if (isset($this->states[$value])) {
            unset($this->states[$value]);
        }

        return $this;
    }

    /**
     * Render action button by item value.
     *
     * @param   integer|null  $value    Current value of this item.
     * @param   integer|null  $row      The row number of this item.
     * @param   array         $options  The options to override group options.
     *
     * @return  string  Rendered HTML.
     *
     * @since   4.0.0
     *
     * @throws  \InvalidArgumentException
     */
    public function render(?int $value = null, ?int $row = null, array $options = []): string
    {
        $data = $this->getState($value) ?? $this->unknownState;

        $data = ArrayHelper::mergeRecursive(
            $this->unknownState,
            $data,
            [
                'options' => $this->options->toArray()
            ],
            [
                'options' => $options
            ]
        );

        $data['row'] = $row;
        $data['icon'] = $this->fetchIconClass($data['icon']);

        return LayoutHelper::render($this->layout, $data);
    }

    /**
     * Render to string.
     *
     * @return  string
     *
     * @since  4.0.0
     */
    public function __toString(): string
    {
        try {
            return $this->render();
        } catch (\Throwable $e) {
            return (string) $e;
        }
    }

    /**
     * Method to get property layout.
     *
     * @return  string
     *
     * @since  4.0.0
     */
    public function getLayout(): string
    {
        return $this->layout;
    }

    /**
     * Method to set property template.
     *
     * @param   string  $layout  The layout path.
     *
     * @return  static  Return self to support chaining.
     *
     * @since   4.0.0
     */
    public function setLayout(string $layout): self
    {
        $this->layout = $layout;

        return $this;
    }

    /**
     * Method to get property options.
     *
     * @return  array
     *
     * @since  4.0.0
     */
    public function getOptions(): array
    {
        return (array) $this->options->toArray();
    }

    /**
     * Method to set property options.
     *
     * @param   array  $options  The options of this button group.
     *
     * @return  static  Return self to support chaining.
     *
     * @since   4.0.0
     */
    public function setOptions(array $options): self
    {
        $this->options = new Registry($options);

        return $this;
    }

    /**
     * Get an option value.
     *
     * @param   string  $name     The option name.
     * @param   mixed   $default  Default value if not exists.
     *
     * @return  mixed  Return option value or default value.
     *
     * @since   4.0.0
     */
    public function getOption(string $name, $default = null)
    {
        return $this->options->get($name, $default);
    }

    /**
     * Set option value.
     *
     * @param   string  $name   The option name.
     * @param   mixed   $value  The option value.
     *
     * @return  static  Return self to support chaining.
     *
     * @since   4.0.0
     */
    public function setOption(string $name, $value): self
    {
        $this->options->set($name, $value);

        return $this;
    }

    /**
     * Method to get the CSS class name for an icon identifier.
     *
     * Can be redefined in the final class.
     *
     * @param   string  $identifier  Icon identification string.
     *
     * @return  string  CSS class name.
     *
     * @since   4.0.0
     */
    public function fetchIconClass(string $identifier): string
    {
        // It's an ugly hack, but this allows templates to define the icon classes for the toolbar
        $layout = new FileLayout('joomla.button.iconclass');

        return $layout->render(array('icon' => $identifier));
    }
}