<?php

/**
 *
 * Class A5 Images
 * * @ A5 Plugin Framework
 * Version: 0.9.8 alpha
 *
 * Gets the alt and title tag for attachments
 *
 * Gets all thumbnail related stuff
 *
 */

class A5_Image {
	
	public static function tags($post, $image_cache, $language_file, $sitewide = false) {
		
		$options = (true === $sitewide) ? get_site_option($image_cache) : get_option($image_cache);
		
		$cache = $options['tags'];
		
		if (array_key_exists($post->ID, $cache)) :
		
			$image_alt = $cache[$post->ID]['image_alt'];
			$image_title = $cache[$post->ID]['image_title'];
			$title_tag = $cache[$post->ID]['title_tag'];
		
		else:
	
			setup_postdata($post);
			
			$args = array(
				'post_type' => 'attachment',
				'numberposts' => 1,
				'post_status' => null,
				'post_parent' => $post->ID
			);
			
			$title_tag = __('Permalink to', $language_file).' '.esc_attr($post->post_title);
			
			$attachments = get_posts( $args );
			
			if ( $attachments ) :
			
				$attachment = $attachments[0];
				  
				$image_alt = trim(strip_tags( get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true) ));
				
				$image_title = trim(strip_tags( $attachment->post_title ));
			
			endif;
		
			$image_alt = (empty($image_alt)) ? esc_attr($post->post_title) : esc_attr($image_alt);
			$image_title = (empty($image_title)) ? esc_attr($post->post_title) : esc_attr($image_title);
			
			$cache[$post->ID]['image_alt'] = $image_alt;
			$cache[$post->ID]['image_title'] = $image_title;
			$cache[$post->ID]['title_tag'] = $title_tag;
			
			$options['tags'] = $cache;
			
			(true === $sitewide) ? update_site_option($image_cache, $options) : update_option($image_cache, $options);
		
		endif;
		
		$tags = array(
			'image_alt' => $image_alt,
			'image_title' => $image_title,
			'title_tag' => $title_tag
		);
		
		return $tags;
	
	} // tags
	
	// getting one image of a post with available sizes as the post thumbnail if there is no number specified, the first image is taken by default
	// the last image will be taken, if the number is bigger than the amount of images in the post
	
	public static function thumbnail($args) {
		
		extract($args);
		
		if (!isset($thumb)) : 
	
			$image = preg_match_all('/<\s*img[^>]+src\s*=\s*["\']?([^\s"\']+)["\']?[\s\/>]+/', do_shortcode($content), $matches);
			
			$sitewide = (!empty($sitewide)) ? $sitewide : true;
			
			$number = (!empty($number)) ? $number : 1;
			
			if ($number == 'last' || $number > count($matches [1])) $number = count($matches [1]);
			
			if ($number > 0) $number -= 1;
			
			if ($image != 0) $thumb = $matches [1] [$number];
			
		endif;
		
		if (empty($thumb)) return false;
		
		$options = (true === $sitewide) ? get_site_option($option) : get_option($option);
		
		$cache = $options['sizes'];
		
		if (array_key_exists($thumb, $cache) && ($cache[$thumb]['width'] == $width || $cache[$thumb]['height'] == $height)) :
		
			$thumb_width = $cache[$thumb]['width'];
			$thumb_height = $cache[$thumb]['height'];
		
		else :
			
			$size = self::get_size($thumb);
			
			if ($width > $size['width']) $width = $size['width'];
			
			if ($height > $size['height']) $height = $size['height'];
			
			$thumb_width = $size['width'];
			
			$thumb_height = $size['height'];
			
			if (!$thumb_height) return false;
			
			$ratio = $thumb_width/$thumb_height;
			
			$args = array(
				'ratio' => $ratio,
				'thumb_width' => $thumb_width,
				'thumb_height' => $thumb_height,
				'width' => $width,
				'height' => $height
			);
			
			$new_size = self::count_size($args);
			
			$thumb_width = $new_size['width'];
			$thumb_height = $new_size['height'];
			
			$cache[$thumb]['width'] = $thumb_width;
			$cache[$thumb]['height'] = $thumb_height;
			
			$options['sizes'] = $cache;
			
			(true === $sitewide) ? update_site_option($option, $options) : update_option($option, $options);
			
		endif;
	
		$image_info = array (
			'thumb' => $thumb,
			'thumb_width' => $thumb_width,
			'thumb_height' => $thumb_height
		);
		
		return $image_info;
	
	}
	
	// getting the image size if having no tags in the image string
	
	public static function get_size($img) {
		
		$image_info = wp_get_image_editor($img);
		
		if ( ! is_wp_error($image_info) ) :
			
			$size = $image_info->get_size();
			
		else :
	
			$uploaddir = wp_upload_dir();
			
			$img = str_replace($uploaddir['baseurl'], $uploaddir['basedir'], $img);
			
			$imgsize = @getimagesize($img);
			
			if (empty($imgsize)) :
			
				if ( ! function_exists( 'download_url' ) ) require_once ABSPATH.'/wp-admin/includes/file.php';
			
				$tmp_image = download_url($img);
				
				if (!is_wp_error($tmp_image)) $imgsize = @getimagesize($img);
				
				@unlink($tmp_image);
				
			endif;
			
			$size = array ( 'width' => $imgsize[0], 'height' => $imgsize[1] );
		
		endif;
		
		return $size;
	
	}
	
	// counting the new size of the image
	
	public static function count_size($args) {
		
		extract($args);
		
		if ($thumb_width && $height) :
			
			if ($ratio > 1) :
					
				$thumb_height = intval($thumb_height/($thumb_width/$width));
				
				$thumb_width = $width;
					
				else :
				
				$thumb_width = intval($thumb_width/($thumb_height/$height));
				
				$thumb_height = $height;
				
			endif;
			
		else :
		
			$ratio = $thumb_width/$thumb_height;
		
			$thumb_width = $width;
			
			$thumb_height = intval($thumb_width/$ratio);
	
		endif;	
		
		return array('width' => $thumb_width, 'height' => $thumb_height);
	
	}
	
	// getting the default size
	
	public static function get_default($plugin_width = false) {
	
		if (!$plugin_width) :
			
			$width = get_option('thumbnail_size_w');
			
			if (empty($width)) $width = 150;
			
			$height = get_option('thumbnail_size_h');
			
			if (empty($height)) :
			
				$height = 150;
				
			endif;
			
		else : 
		
			$width = $plugin_width;
			
			$height = false;
		
		endif;
		
		return array ($width, $height);
		
	}
	
	// Check whether url has status 200 and is image
	 
	private static function check_url($url, $type = false) {
		
		$return = get_headers($url, 1);
		
		switch ($type) :
		
			case 'url' :
			
				if (strstr($return[0], '200')) return true;
			
			break;
			
			case 'image' :
			
				if (strstr($return['Content-Type'], 'image')) return true;
			
			break;
			
			default : 
			
				if (strstr($return[0], '200') && strstr($return['Content-Type'], 'image')) : 
				
					return true;
					
				else : 
				
					return false;
					
				endif;
		
		endswitch;
		
	}
	
}

?>