<?php
/**
 *## TbCarousel class file.
 *
 * @author Christoffer Niska <ChristofferNiska@gmail.com>
 * @copyright Copyright &copy; Christoffer Niska 2011-
 * @license [New BSD License](http://www.opensource.org/licenses/bsd-license.php) 
 * @since 0.9.10
 * 
 * @author Amr Bedair <amr.bedair@gmail.com>
 * @since v4.0.0 - modified to work with bootstrap 3.1.1
 * 
 */

/**
 *## Bootstrap carousel widget.
 *
 * @see <http://twitter.github.com/bootstrap/javascript.html#carousel>
 *
 * @package booster.widgets.grouping
 */
class TbCarousel extends CWidget {
	
	/**
	 * @var string the previous button label. Defaults to '&lsaquo;'.
	 */
	public $prevLabel = '<span class="glyphicon glyphicon-chevron-left"></span>';

	/**
	 * @var string the next button label. Defaults to '&rsaquo;'.
	 */
	public $nextLabel = '<span class="glyphicon glyphicon-chevron-right"></span>';

	/**
	 * @var boolean indicates whether the carousel should slide items.
	 */
	public $slide = true;

	/**
	 * @var boolean indicates whether to display the previous and next links.
	 */
	public $displayPrevAndNext = true;

	/**
	 * @var array the carousel items configuration.
	 */
	public $items = array();

	/**
	 * @var array the options for the Bootstrap Javascript plugin.
	 */
	public $options = array();

	/**
	 * @var string[] the Javascript event handlers.
	 */
	public $events = array();

	/**
	 * @var array the HTML attributes for the widget container.
	 */
	public $htmlOptions = array();

	/**
	 *### .init()
	 *
	 * Initializes the widget.
	 */
	public function init() {
		
		if (!isset($this->htmlOptions['id'])) {
			$this->htmlOptions['id'] = $this->getId();
		}

		$classes = array('carousel');

		if ($this->slide === true) {
			$classes[] = 'slide';
		}

		if (!empty($classes)) {
			$classes = implode(' ', $classes);
			if (isset($this->htmlOptions['class'])) {
				$this->htmlOptions['class'] .= ' ' . $classes;
			} else {
				$this->htmlOptions['class'] = $classes;
			}
		}
	}

	/**
	 *### .run()
	 *
	 * Runs the widget.
	 */
	public function run() {
		
		$id = $this->htmlOptions['id'];

		echo CHtml::openTag('div', $this->htmlOptions);
		$this->renderIndicators();
		echo '<div class="carousel-inner">';
		$this->renderItems($this->items);
		echo '</div>';

		if ($this->displayPrevAndNext) {
			echo '<a class="carousel-control left" href="#' . $id . '" data-slide="prev">' . $this->prevLabel . '</a>';
			echo '<a class="carousel-control right" href="#' . $id . '" data-slide="next">' . $this->nextLabel . '</a>';
		}

		echo '</div>';

		/** @var CClientScript $cs */
		$cs = Yii::app()->getClientScript();
		$options = !empty($this->options) ? CJavaScript::encode($this->options) : '';
		$cs->registerScript(__CLASS__ . '#' . $id, "jQuery('#{$id}').carousel({$options});");

		foreach ($this->events as $name => $handler) {
			$handler = CJavaScript::encode($handler);
			$cs->registerScript(__CLASS__ . '#' . $id . '_' . $name, "jQuery('#{$id}').on('{$name}', {$handler});");
		}
	}
	
	/**
	 * 
	 */
	protected function renderIndicators() {
		
		echo '<ol class="carousel-indicators">';
		$count = count($this->items);
		for ($i = 0; $i < $count; $i++) {
			echo '<li data-target="#'.$this->id.'" data-slide-to="'.$i.'" class="'.($i===0?'active':'').'"></li>';
		}
		echo '</ol>';
	}

	/**
	 *### .renderItems()
	 *
	 * Renders the carousel items.
	 *
	 * @param array $items the item configuration.
	 */
	protected function renderItems($items) {
		
		foreach ($items as $i => $item) {
			if (!is_array($item)) {
				continue;
			}

			if (isset($item['visible']) && $item['visible'] === false) {
				continue;
			}

			if (!isset($item['itemOptions'])) {
				$item['itemOptions'] = array();
			}

			$classes = array('item');

			if ($i === 0) {
				$classes[] = 'active';
			}

            $classes = implode(' ', $classes);
            if (isset($item['itemOptions']['class'])) {
                $item['itemOptions']['class'] .= ' ' . $classes;
            } else {
                $item['itemOptions']['class'] = $classes;
            }

			echo CHtml::openTag('div', $item['itemOptions']);

			if (isset($item['image'])) {
				if (!isset($item['alt'])) {
					$item['alt'] = '';
				}

				if (!isset($item['imageOptions'])) {
					$item['imageOptions'] = array();
				}

                /**
                 * Is this image should be a link?
                 * @since 2.1.0
                 */
                if (isset($item['link'])) {
                    // Any kind of link options
                    if (!isset($item['linkOptions']) || !is_array($item['linkOptions'])) {
                        $item['linkOptions'] = array();
                    }

                    // URL
                    if(is_array($item['link'])) {
                        $route = isset($item['link'][0]) ? $item['link'][0] : '';
                        $item['linkOptions']['href'] = Yii::app()->createUrl($route, array_splice($item['link'], 1));
                    } else {
                        $item['linkOptions']['href'] = $item['link'];
                    }

                    // Print out 'A' tag
                    echo CHtml::openTag('a', $item['linkOptions']);
                }

				echo CHtml::image($item['image'], $item['alt'], $item['imageOptions']);

                if (isset($item['link'])) {
                    echo '</a>';
                }
			}

			if (!empty($item['caption']) && (isset($item['label']) || isset($item['caption']))) {
				if (!isset($item['captionOptions'])) {
					$item['captionOptions'] = array();
				}

				if (isset($item['captionOptions']['class'])) {
					$item['captionOptions']['class'] .= ' carousel-caption';
				} else {
					$item['captionOptions']['class'] = 'carousel-caption';
				}

				echo CHtml::openTag('div', $item['captionOptions']);

				if (isset($item['label'])) {
					echo '<h3>' . $item['label'] . '</h3>';
				}

				if (isset($item['caption'])) {
					echo '<p>' . $item['caption'] . '</p>';
				}

				echo '</div>';
			}
			echo '</div>';
		}
	}
}
