<?php

/**

 * Class SlideshowPluginSlideInserter

 *

 * TODO This class will probably need to be renamed to SlideshowPluginSlideHandler to explain more functionality

 * TODO than just inserting slides. (Show and delete functionality should be applied here as well)

 * @author Stefan Boonstra

 * @version 03-10-2012

 */

class SlideshowPluginSlideInserter {

	/** Flag to see if enqueue function has been called */

	private static $enqueuedFiles;

	/**

	 * Returns the html for showing the image insert button.

	 * Enqueues scripts unless $enqueueFiles is set to false.

	 *

	 * @param boolean $enqueueFiles

	 * @return String $button

	 */

	static function getImageSlideInsertButton($enqueueFiles = true){

		if($enqueueFiles)

			self::enqueueFiles();

		// Put popup html in footer

		add_action('admin_footer', array(__CLASS__, 'includePopup'));

		// Return button html

		ob_start();

		include(SlideshowPluginMain::getPluginPath() . '/views/' . __CLASS__ . '/insert-image-button.php');

		return ob_get_clean();

	}

	/**

	 * Returns the html for showing the text insert button.

	 * Enqueues scripts unless $enqueueFiles is set to false.

	 *

	 * @param boolean $enqueueFiles

	 * @return String $button

	 */

	static function getTextSlideInsertButton($enqueueFiles = true){

		if($enqueueFiles)

			self::enqueueFiles();

		// Return button html

		ob_start();

		include(SlideshowPluginMain::getPluginPath() . '/views/' . __CLASS__ . '/insert-text-button.php');

		return ob_get_clean();

	}

	/**

	 * Returns the html for showing the video insert button.

	 * Enqueues scripts unless $enqueueFiles is set to false.

	 *

	 * @param boolean $enqueueFiles

	 * @return String $button

	 */

	static function getVideoSlideInsertButton($enqueueFiles = true){

		if($enqueueFiles)

			self::enqueueFiles();

		// Return button html

		ob_start();

		include(SlideshowPluginMain::getPluginPath() . '/views/' . __CLASS__ . '/insert-video-button.php');

		return ob_get_clean();

	}

	/**

	 * This function is registered in the SlideshowPluginAjax class

	 * and deletes slides with a particular $_POST['slideId']

	 */

	static function deleteSlide(){

		if((!isset($_POST['slideId']) || !is_numeric($_POST['slideId'])) ||

			(!isset($_POST['postId']) || !is_numeric($_POST['postId'])))

			die;

		$search = 'slide_' . $_POST['slideId'] . '_';

		$settings = get_post_meta($_POST['postId'], 'settings', true);

		if(is_array($settings) && count($settings) > 0){

			foreach($settings as $key => $setting)

				if(strtolower(substr($key, 0, strlen($search))) == strtolower($search))

					unset($settings[$key]);

		}

		update_post_meta($_POST['postId'], 'settings', $settings);

		die;

	}

	/**

	 * This function is registered in the SlideshowPluginAjax class

	 * and prints the results from the search query

	 */

	static function printSearchResults(){

		// Numberposts and offset

		$numberPosts = 10;

		$offset = 0;

		if(isset($_POST['offset']))

			$offset = $_POST['offset'];

		// Get attachments with a title alike the search string, needs to be filtered

		add_filter('posts_where', array(__CLASS__, 'printSearchResultsWhereFilter'));

		$attachments = get_posts(array(

			'numberposts' => $numberPosts + 1,

			'offset' => $offset,

			'orderby' => 'post_date',

			'order' => 'DESC',

			'post_type' => 'attachment',

			'suppress_filters' => false

		));

		remove_filter('posts_where', array(__CLASS__, 'printSearchResultsWhereFilter'));

		// Check if there are enough attachments to print a 'Load more images' button

		$loadMoreResults = false;

		if(count($attachments) > $numberPosts){

			array_pop($attachments);

			$loadMoreResults = true;

		}

		// Print results to the screen

		if(count($attachments) > 0){

			foreach($attachments as $attachment){

				$image = wp_get_attachment_image_src($attachment->ID);

				if(!$image[3]) $image[0] = SlideshowPluginMain::getPluginUrl() . '/images/SlideshowPluginPostType/no-img.png';

				echo '<tr valign="top">

					<td class="image">

						<img width="60" height="60" src="' . $image[0] . '" class="attachment" alt="' . $attachment->post_title . '" title="' . $attachment->post_title . '">

					</td>

					<td class="column-title">

						<strong class="title">

							' . $attachment->post_title . '

						</strong>

						<p class="description">' . $attachment->post_content . '</p>

					</td>

					<td class="insert-button">

						<input

							type="button"

							id="' . $attachment->ID . '"

							class="insert-attachment button-secondary"

							value="' . __('Insert', 'slideshow-plugin') . '"

						/>

					</td>

				</tr>';

			}

			if($loadMoreResults){

				echo '<tr>

					<td colspan="3" style="text-align: center;">

						<button class="button-secondary load-more-results ' . ($offset + $numberPosts) . '" >

							' . __('Load more results', 'slideshow-plugin') . '

						</button>

					</td>

				</tr>';

			}

		} else {

			echo '<tr>

				<td colspan="3" style="text-align: center;">

					<a href="' . admin_url() . 'media-new.php" target="_blank">

						' . __('No images were found, click here to upload some.', 'slideshow-plugin') . '

					</a>

				</td>

			</tr>';

		}

		die;

	}

	/**

	 * Applies a where clause on the get_posts call from self::printSearchResults()

	 *

	 * @param string $where

	 * @return string $where

	 */

	static function printSearchResultsWhereFilter($where){

		global $wpdb;

		if(isset($_POST['search']))

			$where .= $wpdb->prepare(

				" AND (post_title LIKE '%%%s%%' OR ID LIKE '%%%s%%') ",

				$_POST['search'],

				$_POST['search']

			);

		return $where;

	}

	/**

	 * Include popup, needs to be called in the footer

	 */

	static function includePopup(){

		include(SlideshowPluginMain::getPluginPath() . '/views/' . __CLASS__ . '/search-popup.php');

	}

	/**

	 * Enqueues styles and scripts necessary for the media upload button.

	 */

	static function enqueueFiles(){

		// Check if already enqueued

		if(self::$enqueuedFiles)

			return;

		// Enqueue style

		wp_enqueue_style(

			'slideshow-slide-inserter',

			SlideshowPluginMain::getPluginUrl() . '/style/' . __CLASS__ . '/slide-inserter.css'

		);

		// Enqueue insert button script

		wp_enqueue_script(

			'slideshow-slide-inserter',

			SlideshowPluginMain::getPluginUrl() . '/js/' . __CLASS__ . '/slide-inserter.js',

			array('jquery')

		);

		wp_localize_script(

			'slideshow-slide-inserter',

			'SlideInserterTranslations',

			array(

				'confirmMessage' => __('Are you sure you want to delete this slide?', 'slideshow-plugin')

			)

		);

		// Set enqueued to true

		self::$enqueuedFiles = true;

	}

}