Custom Banners Shortcode

function banner_shortcode($atts, $content = '')
	{
		// load the shortcodes attributes and merge with our defaults
		
		// show_caption is defaulted to 1 (on), UNLESS the never_show_captions flag is set
		$show_caption_default = get_option('custom_banners_never_show_captions', 0)
								? 0 // never_show_captions is on, so turn captions off
								: 1; // never_show_captions is off, so default to captions on
			
		// show_cta is defaulted to 1 (on), UNLESS the never_show_cta_buttons flag is set
		$show_cta_default = get_option('custom_banners_never_show_cta_buttons', 0)
								? 0 // never_show_cta_buttons is on, so turn CTAs off
								: 1; // never_show_cta_buttons is off, so default to CTAs on
			
		$defaults = array(	'id' => '',
							'group' => '',
							'caption_position' => 'bottom',
							'transition' => 'none',
							'pager' => false,
							'count' => -1,
							'timer' => 4000,
							'use_image_tag' => true,
							'show_pager_icons' => false,
							'use_pager_thumbnails' => false,
							'hide' => false,
							'width' => get_option('custom_banners_default_width', ''), // 'auto', '100_percent', or integer (width in px)
							'height' => get_option('custom_banners_default_height', ''), // 'auto', or integer (height in px)
							'pause_on_hover' => false,
							'auto_height' => false,
							'prev_next' => false,
							'paused' => false,
							'banner_height' => '', // (only for widget) used to override height with a px value
							'banner_height_px' =>get_option('custom_banners_default_height', ''),
							'banner_width' => '', // (only for widget) used to override width with a px value
							'banner_width_px' =>  get_option('custom_banners_default_width', ''),
							'link_entire_banner' => get_option('custom_banners_use_big_link', 0),
							'open_link_in_new_window' => get_option('custom_banners_open_link_in_new_window', 0),
							'show_caption' => $show_caption_default,
							'show_cta_button' => $show_cta_default,
							'theme' => get_option('custom_banners_theme')
						);

		$atts = shortcode_atts($defaults, $atts);
		
/* 		echo "<pre>";
		var_dump($atts);
		echo "</pre>";
 */		
		$banner_id = intval($atts['id']);
		
		// if theme is not available, fallback to default style
		$atts['theme'] = $this->filter_theme_name($atts['theme'], $banner_id);

		// card theme requires image tags
		if ( strpos($atts['theme'], 'card-') !== false ) {
			$atts['use_image_tag'] = true;
		}
				
		// Generate the HTML for the requested banners (could be a single banner, or many)
		if( $banner_id > 0 ) {
			// A single banner ID was specified, so just load it directly
			$banner = $this->get_banner_by_id($banner_id);
			if ($banner !== false) {
				$html = $this->buildBannerHTML($banner, $banner_id, $atts);
			}
		}
		else {
			// choose a banner based on the other attributes 	
			$banners = $this->get_banners_by_atts($atts);
			$atts['slideshow'] = $this->atts_contain_valid_slideshow_transition($atts);
			$is_slideshow = $atts['slideshow'];
			
			//generate a random number to have a unique wrapping class on each slideshow
			//this should prevent controls that effect more than one slideshow on a page
			$target = rand();

			$banners_html = '';
			// build the HTML for each banner, concatenating its output to $html
			foreach($banners as $index => $banner) {
				// If we are outputting a slideshow, hide all but the first banner
				$atts['hide'] = ( $is_slideshow && ($index > 0) );
				
				// Add this banner's HTML to the output
				$banners_html .= $this->buildBannerHTML($banner, $banner_id, $atts);
			}

			/*
			 * If its a slideshow, wrap the banners in the slideshow HTML now
			*/
			
			if( $is_slideshow ) {
				
				if ($atts['banner_width'] == 'specify') { //if the width was specified via the widget, use it here, otherwise go with global option
					$atts['width'] = intval($atts['banner_width_px']);
				}
				
				// start the slideshow's HTML (if required). This returns a <div> with attributes 
				// reflecting the shortcode settings, and instructions for cycle2			
				$wrapper_html = $this->get_opening_tag_for_slideshow($target, $atts);

				// insert list of banners into t he middle of the slideshow
				$wrapper_html .= $banners_html;
								
				// add a pager and close the slideshow's HTML (if requested)
				$wrapper_html .= $this->get_slideshow_controls_html( $atts, $target );
				
				$wrapper_html .= '</div><!-- end slideshow -->';
				$html = $wrapper_html;
			} else {
				$html = $banners_html;
			}
		}
		
		// return the generated HTML
		return $html;
	}