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fly-dynamic-image-resizer.php
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fly-dynamic-image-resizer.php
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<?php
/*
Plugin Name: Fly Dynamic Image Resizer
Description: Dynamically create image sizes on the fly!
Version: 1.0.3
Author: Junaid Bhura
Author URI: http://www.junaidbhura.com
Text Domain: fly-images
*/
defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
/**
* Main Class
*/
class Fly_Images {
/* Variables */
private $_image_sizes = array();
private $_fly_dir = '';
private $_fly_dir_writeable = false;
private $_show_notice = false;
private $_capability = 'manage_options';
/**
* Constructor
*/
public function __construct() {
/* Initializations */
add_action( 'init', array( $this, 'init' ) );
}
/**
* Initializes Actions
*/
public function init() {
/* Checks for Fly Images Directory */
$this->_fly_dir = apply_filters( 'fly_dir_path', $this->get_fly_dir() );
// Check if the Fly Image folder exists and is writeable
if ( ! is_dir( $this->_fly_dir ) ) {
try {
if ( mkdir( $this->_fly_dir, 0755 ) ) {
$this->_fly_dir_writeable = true;
} } catch ( Exception $e ) {}
} elseif ( is_writeable( $this->_fly_dir ) ) {
$this->_fly_dir_writeable = true;
}
add_action( 'admin_menu', array( $this, 'admin_menu' ) );
add_filter( 'media_row_actions', array( $this, 'media_row_action' ), 10, 2 );
add_action( 'delete_attachment', array( $this, 'delete_attachment' ) );
}
/**
* Admin Menu Item
*/
public function admin_menu() {
/* Capability Filter */
$this->_capability = apply_filters( 'fly_images_user_capability', $this->_capability );
add_management_page( __( 'Fly Images', 'fly-images' ), __( 'Fly Images', 'fly-images' ), $this->_capability, 'fly-images', array( $this, 'options_page' ) );
}
/**
* Adds a new row action to media library items.
*
* @param array $actions
* @param object $post
* @return array
*/
public function media_row_action( $actions, $post ) {
if ( 'image/' != substr( $post->post_mime_type, 0, 6 ) || ! current_user_can( $this->_capability ) ) {
return $actions;
}
$url = wp_nonce_url( admin_url( 'tools.php?page=fly-images&delete-fly-image&ids=' . $post->ID ), 'delete_fly_image', 'fly_nonce' );
$actions['fly-image-delete'] = '<a href="' . esc_url( $url ) . '" title="' . esc_attr( __( 'Delete all cached image sizes for this image', 'fly-images' ) ) . '">' . __( 'Delete Cached Fly Images', 'fly-images' ) . '</a>';
return $actions;
}
/**
* Deletes all fly images when the main image is deleted.
*
* @param integer $post_id
* @return void
*/
public function delete_attachment( $post_id = 0 ) {
$directory = $this->get_fly_dir( $post_id );
if ( is_dir( $directory ) ) {
try {
array_map( 'unlink', ( glob( $directory . '/*' ) ) ?: array() );
rmdir( $directory );
} catch ( Exception $e ) {}
}
}
/**
* The Options Page
*/
public function options_page() {
/* Check for actions */
if ( isset( $_POST ) && isset( $_POST['fly_nonce'] ) && wp_verify_nonce( $_POST['fly_nonce'], 'delete_all_fly_images' ) ) {
// Deletes all cached images
$subdirectories = scandir( $this->get_fly_dir() );
if ( $subdirectories ) {
foreach ( $subdirectories as $subdirectory ) {
if ( '.' != $subdirectory && '..' != $subdirectory ) {
$directory_path = $this->get_fly_dir( $subdirectory );
array_map( 'unlink', ( glob( $directory_path . '/*' ) ) ?: array() );
rmdir( $directory_path );
}
}
}
echo '<div class="updated"><p>' . __( 'All cached images created on the fly have been deleted.', 'fly-images' ) . '</p></div>';
} elseif ( isset( $_GET['delete-fly-image'] ) && isset( $_GET['ids'] ) && isset( $_GET['fly_nonce'] ) && wp_verify_nonce( $_GET['fly_nonce'], 'delete_fly_image' ) ) {
// Deletes cache for a single / few images
$ids = array_map( 'intval', array_map( 'trim', explode( ',', $_GET['ids'] ) ) );
if ( $ids ) {
foreach ( $ids as $id ) {
$directory = $this->get_fly_dir( $id );
if ( is_dir( $directory ) ) {
array_map( 'unlink', ( glob( $directory . '/*' ) ) ?: array() );
rmdir( $directory );
}
}
echo '<div class="updated"><p>' . __( sprintf( 'Deleted all cached sizes for this image. <a href="%s">Click here</a> to go back to the previous page.', 'javascript:history.go(-1)' ), 'fly-images' ) . '</p></div>';
}
}
// Show the template
load_template( dirname( __FILE__ ) . '/templates/options.php' );
}
/**
* Checks if the main cache folder is writeable.
*
* @return boolean
*/
public function fly_dir_writeable() {
return $this->_fly_dir_writeable;
}
/**
* Add image sizes to be created on the fly.
*
* @param string $size_name
* @param integer $width
* @param integer $height
* @param boolean $crop
*/
public function add_image_size( $size_name, $width = 0, $height = 0, $crop = false ) {
if ( '' == $size_name || ! $width || ! $height ) {
return false;
}
$this->_image_sizes[ $size_name ] = array( 'size' => array( $width, $height ), 'crop' => $crop );
return true;
}
/**
* Gets a previously declared image size.
*
* @param string $size_name
* @return array
*/
public function get_image_size( $size_name = '' ) {
if ( '' == $size_name || ! isset( $this->_image_sizes[ $size_name ] ) ) {
return array();
} else {
return $this->_image_sizes[ $size_name ];
}
}
/**
* Gets a dynamically generated image URL from the Fly_Images class.
*
* @param integer $attachment_id
* @param mixed $size
* @param boolean $crop
* @return array
*/
public function get_attachment_image_src( $attachment_id = 0, $size = '', $crop = null ) {
if ( $attachment_id < 1 || '' == $size ) {
return array();
}
// If size is 'full', we don't need a fly image
if ( 'full' == $size ) {
return wp_get_attachment_image_src( $attachment_id, 'full' );
}
// Get the attachment image
$image = wp_get_attachment_metadata( $attachment_id );
if ( false !== $image && $image ) {
// Determine file name based on size
if ( gettype( $size ) == 'string' ) {
/* String Size */
$image_size = $this->get_image_size( $size );
if ( empty( $image_size ) ) {
return array();
}
$width = $image_size['size'][0];
$height = $image_size['size'][1];
$crop = isset( $crop ) ? $crop : $image_size['crop'];
} elseif ( gettype( $size ) == 'array' ) {
/* Array Size */
$width = $size[0];
$height = $size[1];
} else {
return array();
}
$fly_dir = $this->get_fly_dir( $attachment_id );
$fly_file_name = $fly_dir . DIRECTORY_SEPARATOR . $this->get_fly_file_name( basename( $image['file'] ), $width, $height, $crop );
// Check if file exsists
if ( file_exists( $fly_file_name ) ) {
$image_editor = wp_get_image_editor( $fly_file_name );
if (!is_wp_error($image_editor)) {
$image_dimensions = $image_editor->get_size();
return array(
'src' => $this->get_fly_path( $fly_file_name ),
'width' => $image_dimensions['width'],
'height' => $image_dimensions['height'],
);
}
}
// Check if images directory is writeable
if ( ! $this->_fly_dir_writeable ) {
return array();
}
// File does not exist, lets check if directory exists
if ( ! is_dir( $fly_dir ) ) {
// Directory does not exist, let's create it
try {
if ( ! mkdir( $fly_dir, 0755 ) ) {
return array();
}
} catch ( Exception $e ) {
return array();
}
}
// Get WP Image Editor Instance
$image_path = get_attached_file( $attachment_id );
$image_editor = wp_get_image_editor( $image_path );
if ( ! is_wp_error( $image_editor ) ) {
// Create new image
$image_editor->resize( $width, $height, $crop );
$image_editor->save( $fly_file_name );
// Image created, return its data
$image_dimensions = $image_editor->get_size();
return array(
'src' => $this->get_fly_path( $fly_file_name ),
'width' => $image_dimensions['width'],
'height' => $image_dimensions['height'],
);
}
}
// Something went wrong
return array();
}
/**
* Gets a dynamically generated image HTML from the Fly_Images class.
*
* Based on /wp-includes/media.php -> wp_get_attachment_image()
*
* @param integer $attachment_id
* @param mixed $size
* @param boolean $crop
* @param array $attr
* @return string
*/
public function get_attachment_image( $attachment_id = 0, $size = '', $crop = null, $attr = array() ) {
if ( $attachment_id < 1 || '' == $size ) {
return '';
}
// If size is 'full', we don't need a fly image
if ( 'full' == $size ) {
return wp_get_attachment_image( $attachment_id, $size, $attr );
}
$html = '';
$image = $this->get_attachment_image_src( $attachment_id, $size, $crop );
if ( $image ) {
$hwstring = image_hwstring( $image['width'], $image['height'] );
$size_class = $size;
if ( is_array( $size_class ) ) {
$size_class = join( 'x', $size );
}
$attachment = get_post( $attachment_id );
$default_attr = array(
'src' => $image['src'],
'class' => "attachment-$size_class",
'alt' => trim( strip_tags( get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ) ) ),
);
if ( empty( $default_attr['alt'] ) ) {
$default_attr['alt'] = trim( strip_tags( $attachment->post_excerpt ) );
}
if ( empty( $default_attr['alt'] ) ) {
$default_attr['alt'] = trim( strip_tags( $attachment->post_title ) );
}
$attr = wp_parse_args( $attr, $default_attr );
$attr = apply_filters( 'fly_get_attachment_image_attributes', $attr, $attachment, $size );
$attr = array_map( 'esc_attr', $attr );
$html = rtrim( "<img $hwstring" );
foreach ( $attr as $name => $value ) {
$html .= " $name=" . '"' . $value . '"';
}
$html .= ' />';
}
return $html;
}
/**
* Gets a file name based on parameters.
*
* @param string $file_name
* @param string $width
* @param string $height
* @param boolean $crop
* @return string
*/
public function get_fly_file_name( $file_name, $width, $height, $crop ) {
$file_name_only = pathinfo( $file_name, PATHINFO_FILENAME );
$file_extension = pathinfo( $file_name, PATHINFO_EXTENSION );
return $file_name_only . '-' . $width . 'x' . $height . ( $crop ? '-c' : '' ) . '.' . $file_extension;
}
/**
* Gets the path to the directory where all Fly images are stored.
*
* @param string $path
* @return string
*/
public function get_fly_dir( $path = '' ) {
if ( '' === $this->_fly_dir ) {
$wp_upload_dir = wp_upload_dir();
return $wp_upload_dir['basedir'] . DIRECTORY_SEPARATOR . 'fly-images' . ( '' !== $path ? DIRECTORY_SEPARATOR . $path : '' );
} else {
return $this->_fly_dir . ( '' !== $path ? DIRECTORY_SEPARATOR . $path : '' );
}
}
/**
* Gets the full path of an image based on it's absolute path.
*
* @param string $absolute_path
* @return string
*/
public function get_fly_path( $absolute_path = '' ) {
$wp_upload_dir = wp_upload_dir();
$path = $wp_upload_dir['baseurl'] . str_replace( $wp_upload_dir['basedir'], '', $absolute_path );
return str_replace( DIRECTORY_SEPARATOR, '/', $path );
}
/**
* Gets the absolute path of an image based on it's full path.
*
* @param string $path
* @return string
*/
public function get_fly_absolute_path( $path = '' ) {
$wp_upload_dir = wp_upload_dir();
return $wp_upload_dir['basedir'] . str_replace( $wp_upload_dir['baseurl'], '', $path );
}
}
if ( ! function_exists( 'fly_add_image_size' ) ) {
/**
* Add image sizes to the Fly_Images class.
*
* @param string $size_name
* @param integer $width
* @param integer $height
* @param boolean $crop
*/
function fly_add_image_size( $size_name = '', $width = 0, $height = 0, $crop = false ) {
global $fly_images;
return $fly_images->add_image_size( $size_name, $width, $height, $crop );
}
}
if ( ! function_exists( 'fly_get_attachment_image_src' ) ) {
/**
* Gets a dynamically generated image URL from the Fly_Images class.
*
* @param integer $attachment_id
* @param mixed $size
* @param boolean $cropped
* @return string
*/
function fly_get_attachment_image_src( $attachment_id = 0, $size = '', $crop = null ) {
global $fly_images;
return $fly_images->get_attachment_image_src( $attachment_id, $size, $crop );
}
}
if ( ! function_exists( 'fly_get_attachment_image' ) ) {
/**
* Gets a dynamically generated image HTML from the Fly_Images class.
*
* @param integer $attachment_id
* @param mixed $size
* @param boolean $crop
* @param array $attr
* @return string
*/
function fly_get_attachment_image( $attachment_id = 0, $size = '', $crop = null, $attr = array() ) {
global $fly_images;
return $fly_images->get_attachment_image( $attachment_id, $size, $crop, $attr );
}
}
// Initialize Plugin!
global $fly_images;
$fly_images = new Fly_Images();