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<?php
class Genesis_Club_Thumbnails {
const THUMBNAIL_FOLDER = 'thumbnails';
const THUMBNAIL_SIZE = 'thumbnail';
private $defaults = array('size' => '', 'attr' => array(), 'format' => 'html');
private $thumbnail_quality;
private $thumbnail_folder;
private $thumbnail_size;
private $thumbnail_height;
private $thumbnail_width;
private $thumbnail_crop;
function __construct($quality=0) {
$this->set_quality($quality);
$this->set_folder();
$this->set_size();
}
function get_featured_thumbnail($content, $args, $post) {
if (has_post_thumbnail())
return $content; //use featured image if one exists
else {
$args = wp_parse_args ($args, $this->defaults);
$this->set_size($args['size']);
$post_id = is_object($post) ? $post->ID : $post;
if ($thumb = $this->get_thumbnail($post_id))
return $this->get_thumb_format($thumb, $post_id, $args);
else
return $content;
}
}
function get_thumb_format($thumb, $post_id, $args) {
if ('url'==$args['format'] )
return $thumb['src'] ;
else
return sprintf('<img %1$s src="%2$s" alt="%3$s" %4$s />',
image_hwstring($thumb['width'], $thumb['height']) ,
$thumb['src'],
$this->get_featured_image_alt($post_id),
(is_array($args['attr']) && array_key_exists('class',$args['attr'])) ? sprintf('class="%1$s"',$args['attr']['class']) : '');
}
function get_thumbnail($post_id) {
$thumbs = array();
$thumb_exists = false;
if ($thumb_values = get_post_meta($post_id, Genesis_Club_Media::FEATURED_THUMBS_KEY, true)) {
$thumbs = (array) maybe_unserialize($thumb_values);
if (is_array($thumbs) && array_key_exists($this->thumbnail_size,$thumbs)) {
$thumb = $thumbs[$this->thumbnail_size];
$thumb_exists = array_key_exists('src',$thumb) && $this->url_exists($thumb['src']);
}
}
if ($thumb_exists)
return $thumb;
elseif ($url = $this->get_featured_image_url($post_id)) {
$thumb = $this->resize_image($url, $this->thumbnail_quality);
if (!is_wp_error($thumb)) {
$thumbs[$this->thumbnail_size] = $thumb;
update_post_meta($post_id, Genesis_Club_Media::FEATURED_THUMBS_KEY, $thumbs);
return $thumb;
}
}
return false;
}
function get_facebook_image($image, $the_id=0, $args= array('size' => 'full')) {
global $post;
if (empty($the_id) && is_singular() ) $the_id = $post->ID;
if ($url = $this->get_featured_image_url($the_id)) {
if ($args['size'] == 'full') {
$image = $url;
} else {
$args = wp_parse_args ($args, $this->defaults);
$this->set_size($args['size']);
if ($thumb = $this->get_thumbnail($the_id))
$image = $thumb['src'];
}
}
return $image;
}
function get_featured_image_alt($post_id) {
return get_post_meta($post_id, Genesis_Club_Media::FEATURED_IMAGE_ALT_KEY, true);
}
function get_featured_image_url($post_id) {
$url = get_post_meta($post_id, Genesis_Club_Media::FEATURED_IMAGE_KEY, true);
if (empty($url)) {
$content = get_post_field('post_content',$post_id);
$url = $this->get_first_url_from_content($content);
if ($url) update_post_meta($post_id, Genesis_Club_Media::FEATURED_IMAGE_KEY, $url);
}
return $url;
}
function get_first_url_from_content($html) {
$images = array();
preg_match_all('/(imgsrc|src)=(\"|\')[^\"\'>]+/i', $html, $images);
$urls=preg_replace('/(imgsrc|src)(\"|\'|=\"|=\')(.*)/i',"$3",$images[0]);
foreach($urls as $url) {
$ext = substr(strrchr($url, '.'), 1);
if (isset($ext)
&& ( ($ext == 'jpg') || ($ext == 'jpeg') || ($ext == 'gif') || ($ext == 'png'))
&& $this->url_exists($url))
return $url;
}
return false;
}
function url_exists($url) {
$hdrs = @get_headers($url);
return is_array($hdrs) && (strpos($hdrs[0],'404') === FALSE);
}
function resize_image($url, $jpeg_quality, $suffix = null) {
@ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) );
if ( ! $original_imagestring = @file_get_contents( $url ))
return new WP_Error('fetch_image_failed',__('Unable to read image file “%s”.'), $url);
if ( ! function_exists('imagecreatefromstring') )
return new WP_Error('no_gd_library',__('The GD image library is not installed.'));
$original_image = @imagecreatefromstring( $original_imagestring );
if ( !is_resource( $original_image ) )
return new WP_Error('fetch_image_failed',__('File “%s” is not an image.'), $url);
$orig_w = imagesx( $original_image);
$orig_h = imagesy( $original_image);
$orig_type = substr(strrchr($url, '.'), 1);
$max_w = $this->thumbnail_width;
$max_h = $this->thumbnail_height;
$dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $this->thumbnail_crop);
if ( !$dims )
return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') );
list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
$newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
imagecopyresampled( $newimage, $original_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
// convert from full colors to index colors, like original PNG.
if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $original_image) )
imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );
// we don't need the original in memory anymore
imagedestroy( $original_image );
$ext = substr(strrchr($url, '.'), 1);
if ( !$suffix ) $suffix = "{$dst_w}x{$dst_h}";
$file = substr(strrchr($url, '/'), 1);
$name = wp_basename($file, ".$ext")."-{$suffix}.{$ext}";
$uploads = wp_upload_dir();
$thumbnail_dir = $uploads['basedir'] .'/'. $this->thumbnail_folder;
if (! file_exists($thumbnail_dir)) mkdir($thumbnail_dir);
$destfilename = $thumbnail_dir . '/'. $name;
$desturl = $uploads['baseurl'] .'/'. $this->thumbnail_folder . '/'. $name;
if ( IMAGETYPE_GIF == $orig_type ) {
if ( !imagegif( $newimage, $destfilename ) )
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
} elseif ( IMAGETYPE_PNG == $orig_type ) {
if ( !imagepng( $newimage, $destfilename ) )
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
} else {
// all other formats are converted to jpg
if ( !imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ) )
return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
}
imagedestroy( $newimage );
// Set correct file permissions
$stat = stat( dirname( $destfilename ));
$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
@ chmod( $destfilename, $perms );
return array( 'src' => $desturl, 'width' => $dst_w, 'height' => $dst_h);
}
function get_all_image_sizes() {
global $_wp_additional_image_sizes;
foreach ( get_intermediate_image_sizes() as $s ) {
$sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => FALSE );
if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
$sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
else
$sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
$sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
else
$sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
$sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] ); // For theme-added sizes
else
$sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
}
return $sizes ;
}
private function set_size($preferred_size = '') {
if (empty($preferred_size)) $preferred_size = self::THUMBNAIL_SIZE;
if ($preferred_size == $this->thumbnail_size) return true;
$sizes = $this->get_all_image_sizes();
$valid_size = ($preferred_size && array_key_exists($preferred_size,$sizes)) ? $preferred_size : 'thumbnail';
if (!array_key_exists($valid_size, $sizes)) $sizes[$valid_size] = array('width'=> 150, 'height' => 150, 'crop' => true);
$this->thumbnail_size = $valid_size;
$this->thumbnail_width = $sizes[$valid_size]['width'];
$this->thumbnail_height = $sizes[$valid_size]['height'];
$this->thumbnail_crop = $sizes[$valid_size]['crop'];
}
private function set_folder($preferred_folder ='') {
if (empty($preferred_folder)) $preferred_folder = self::THUMBNAIL_FOLDER;
if ($preferred_folder != $this->thumbnail_folder)
$this->thumbnail_folder = $preferred_folder;
}
private function set_quality($quality = 0) {
if (empty($quality)) $quality = Genesis_Club_Media::THUMBNAIL_QUALITY;
$this->thumbnail_quality = min($quality,100);
}
}