<?php

/**

 * Class SlideslowPlugin is called whenever a slideshow do_action tag is come across.

 * Responsible for outputting the slideshow's HTML, CSS and Javascript.

 *

 * TODO Create a variable in which all slideshow html can be stored <- Rethink this, slideshow containers have random ids.

 * @author: Stefan Boonstra

 * @version: 22-09-12

 */

class SlideshowPlugin {

	/**

	 * Function deploy prints out the prepared html

	 *

	 * @param int $postId

	 */

	static function deploy($postId = null){

		echo self::prepare($postId);

	}

	/**

	 * Function prepare returns the required html and enqueues

	 * the scripts and stylesheets necessary for displaying the slideshow

	 *

	 * Passing this function no parameter or passing it a negative one will

	 * result in a random pick of slideshow

	 *

	 * @param int $postId

	 * @return String $output

	 */

	static function prepare($postId = null){

		// Get post by its ID, or by its slug

		if(is_numeric($postId))

			$post = wp_get_single_post($postId);

		if(is_string($postId)){

			$query = new WP_Query(array(

				'post_type' => SlideshowPluginPostType::$postType,

				'name' => $postId,

				'orderby' => 'post_date',

				'order' => 'DESC'

			));

			if($query->have_posts())

				$post = $query->next_post();

		}

		// When no slideshow is found, get one at random

		if(empty($post)){

			$post = get_posts(array(

				'numberposts' => 1,

				'orderby' => 'rand',

				'post_type' => SlideshowPluginPostType::$postType

			));

			if(is_array($post))

				$post = $post[0];

		}

		// Exit on error

		if(empty($post)){echo 'dayum';

			return '<!-- Wordpress Slideshow - No slideshows available -->';

		}

		// Get settings

		$allSettings = SlideshowPluginPostType::getSimpleSettings($post->ID, null, false);

		// Get stored slide settings and convert them to array([slide-key] => array([setting-name] => [value]));

		$slidesPreOrder = array();

		$slideSettings = SlideshowPluginPostType::getSettings($post->ID, SlideshowPluginPostType::$prefixes['slide-list'], false);

		if(is_array($slideSettings) && count($slideSettings) > 0)

			foreach($slideSettings as $key => $value){

				$key = explode('_', $key);

				if(is_numeric($key[1]))

					$slidesPreOrder[$key[1]][$key[2]] = $value;

			}

		// Create array ordered by the 'order' key of the slides array: array([order-key] => [slide-key]);

		$slidesOrder = array();

		if(count($slidesPreOrder) > 0){

			foreach($slidesPreOrder as $key => $value)

				if(isset($value['order']) && is_numeric($value['order']) && $value['order'] > 0)

					$slidesOrder[$value['order']][] = $key;

		}

		ksort($slidesOrder);

		// Order slides by the order key.

		$slides = array();

		if(count($slidesOrder) > 0)

			foreach($slidesOrder as $value)

				if(is_array($value))

					foreach($value as $slideId){

						$slides[] = $slidesPreOrder[$slideId];

						unset($slidesPreOrder[$slideId]);

					}

		// Add remaining (unordered) slides to the end of the array.

		$slides = array_merge($slides, $slidesPreOrder);

		// Randomize if setting is true.

		if(isset($allSettings['setting_random']) && $allSettings['setting_random'] == 'true')

			shuffle($slides);

		// Enqueue functional sheet

		wp_enqueue_style(

			'slideshow_functional_style',

			SlideshowPluginMain::getPluginUrl() . '/style/' . __CLASS__ . '/functional.css'

		);

		// Create a microtime timestamp to host multiple slideshows with different styles and settings on the same page

		$randomId = rand();

		// Get stylesheet for printing

		$style = '';

		if($allSettings['style_style'] == 'custom' && isset($allSettings['style_custom']) && !empty($allSettings['style_custom'])){ // Custom style

			$style = str_replace('%plugin-url%', SlideshowPluginMain::getPluginUrl(), $allSettings['style_custom']);

		}else{ // Set style

			$filePath = SlideshowPluginMain::getPluginPath() . '/style/' . __CLASS__ . '/style-' . $allSettings['style_style'] . '.css';

			if(file_exists(SlideshowPluginMain::getPluginPath() . '/style/' . __CLASS__ . '/style-' . $allSettings['style_style'] . '.css')){

				ob_start();

				include($filePath);

				$style = str_replace('%plugin-url%', SlideshowPluginMain::getPluginUrl(), ob_get_clean());

			}

		}

		// Append the random ID to the slideshow container in the stylesheet, to identify multiple slideshows

		if(!empty($style))

			$style = str_replace('.slideshow_container', '.slideshow_container_' . $randomId, $style);

		// Filter settings to only contain settings, then remove prefix

		$settings = array();

		if(is_array($allSettings) && count($allSettings) > 0)

			foreach($allSettings as $key => $value)

				if(SlideshowPluginPostType::$prefixes['settings'] == substr($key, 0, strlen(SlideshowPluginPostType::$prefixes['settings'])))

					$settings[substr($key, strlen(SlideshowPluginPostType::$prefixes['settings']))] = $value;

		// Include output file that stores output in $output.

		$output = '';

		ob_start();

		include(SlideshowPluginMain::getPluginPath() . '/views/' . __CLASS__ . '/slideshow.php');

		$output .= ob_get_clean();

		// Enqueue flash object creation script

		wp_enqueue_script(

			'swfobject',

			SlideshowPluginMain::getPluginUrl() . '/js/' . __CLASS__ . 'swfobject.js'

		);

		// Enqueue slideshow script

		wp_enqueue_script(

			'slideshow_script',

			SlideshowPluginMain::getPluginUrl() . '/js/' . __CLASS__ . '/slideshow.js',

			array('jquery')

		);

		// Return output

		return $output;

	}

}