<?php
/**
 * TbButtonColumn class file.
 *
 * @author Christoffer Niska <ChristofferNiska@gmail.com>
 * @copyright  Copyright &copy; Christoffer Niska 2011-
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 *
 * @since 0.9.8
 */
Yii::import('zii.widgets.grid.CButtonColumn');

/**
 * Bootstrap button column widget.
 * Used to set buttons to use Glyphicons instead of the defaults images.
 */
class TbButtonColumn extends CButtonColumn
{
    /**
     * @var string the view button icon (defaults to 'eye-open')
     */
    public $viewButtonIcon = 'eye-open';
    /**
     * @var string the update button icon (defaults to 'pencil')
     */
    public $updateButtonIcon = 'pencil';
    /**
     * @var string the delete button icon (defaults to 'trash')
     */
    public $deleteButtonIcon = 'trash';

    /**
     * Initializes the default buttons (view, update and delete).
     */
    protected function initDefaultButtons()
    {
        parent::initDefaultButtons();

        if ($this->viewButtonIcon !== false && ! isset($this->buttons['view']['icon'])) {
            $this->buttons['view']['icon'] = $this->viewButtonIcon;
        }
        if ($this->updateButtonIcon !== false && ! isset($this->buttons['update']['icon'])) {
            $this->buttons['update']['icon'] = $this->updateButtonIcon;
        }
        if ($this->deleteButtonIcon !== false && ! isset($this->buttons['delete']['icon'])) {
            $this->buttons['delete']['icon'] = $this->deleteButtonIcon;
        }
    }

    /**
     * Renders a link button.
     *
     * @param string $id     the ID of the button
     * @param array  $button the button configuration which may contain 'label', 'url', 'imageUrl' and 'options' elements
     * @param int    $row    the row number (zero-based)
     * @param mixed  $data   the data object associated with the row
     */
    protected function renderButton($id, $button, $row, $data)
    {
        if (
            isset($button['visible']) &&
            ! $this->evaluateExpression($button['visible'], ['row' => $row, 'data' => $data])
        ) {
            return;
        }

        $label = isset($button['label']) ? $button['label'] : $id;
        $url = isset($button['url'])
            ? $this->evaluateExpression($button['url'], ['data' => $data, 'row' => $row])
            : '#';
        $options = isset($button['options']) ? $button['options'] : [];

        if (! isset($options['title'])) {
            $options['title'] = $label;
        }

        if (! isset($options['rel'])) {
            $options['rel'] = 'tooltip';
        }

        if (isset($button['icon']) && is_callable($button['icon'])) {
            $icon = $this->evaluateExpression($button['icon'], ['data' => $data, 'row' => $row]);
            echo CHtml::link('<i class="'.$icon.'"></i>', $url, $options);
        } elseif (isset($button['icon']) && ! is_callable($button['icon'])) {
            if (strpos($button['icon'], 'icon') === false) {
                $button['icon'] = 'icon-'.implode(' icon-', explode(' ', $button['icon']));
            }

            echo CHtml::link('<i class="'.$button['icon'].'"></i>', $url, $options);
        } elseif (isset($button['imageUrl']) && is_string($button['imageUrl'])) {
            echo CHtml::link(CHtml::image($button['imageUrl'], $label), $url, $options);
        } else {
            echo CHtml::link($label, $url, $options);
        }
    }
}