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<?php /*

**************************************************************************

Plugin Name:  Regenerate Thumbnails
Plugin URI:   http://www.viper007bond.com/wordpress-plugins/regenerate-thumbnails/
Description:  Allows you to regenerate all thumbnails after changing the thumbnail sizes.
Version:      2.2.4
Author:       Viper007Bond
Author URI:   http://www.viper007bond.com/

**************************************************************************

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

**************************************************************************/

class RegenerateThumbnails {
	var $menu_id;

// Plugin initialization
	function RegenerateThumbnails() {
		// Load up the localization file if we're using WordPress in a different language
		// Place it in this plugin's "localization" folder and name it "regenerate-thumbnails-[value in wp-config].mo"
		load_plugin_textdomain( 'regenerate-thumbnails', false, '/regenerate-thumbnails/localization' );

add_action( 'admin_menu',                              array( &$this, 'add_admin_menu' ) );
		add_action( 'admin_enqueue_scripts',                   array( &$this, 'admin_enqueues' ) );
		add_action( 'wp_ajax_regeneratethumbnail',             array( &$this, 'ajax_process_image' ) );
		add_filter( 'media_row_actions',                       array( &$this, 'add_media_row_action' ), 10, 2 );
		//add_filter( 'bulk_actions-upload',                     array( &$this, 'add_bulk_actions' ), 99 ); // A last minute change to 3.1 makes this no longer work
		add_action( 'admin_head-upload.php',                   array( &$this, 'add_bulk_actions_via_javascript' ) );
		add_action( 'admin_action_bulk_regenerate_thumbnails', array( &$this, 'bulk_action_handler' ) ); // Top drowndown
		add_action( 'admin_action_-1',                         array( &$this, 'bulk_action_handler' ) ); // Bottom dropdown (assumes top dropdown = default value)

// Allow people to change what capability is required to use this plugin
		$this->capability = apply_filters( 'regenerate_thumbs_cap', 'manage_options' );
	}

// Register the management page
	function add_admin_menu() {
		$this->menu_id = add_management_page( __( 'Regenerate Thumbnails', 'regenerate-thumbnails' ), __( 'Regen. Thumbnails', 'regenerate-thumbnails' ), $this->capability, 'regenerate-thumbnails', array(&$this, 'regenerate_interface') );
	}

// Enqueue the needed Javascript and CSS
	function admin_enqueues( $hook_suffix ) {
		if ( $hook_suffix != $this->menu_id )
			return;

// WordPress 3.1 vs older version compatibility
		if ( wp_script_is( 'jquery-ui-widget', 'registered' ) )
			wp_enqueue_script( 'jquery-ui-progressbar', plugins_url( 'jquery-ui/jquery.ui.progressbar.min.js', __FILE__ ), array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.8.6' );
		else
			wp_enqueue_script( 'jquery-ui-progressbar', plugins_url( 'jquery-ui/jquery.ui.progressbar.min.1.7.2.js', __FILE__ ), array( 'jquery-ui-core' ), '1.7.2' );

wp_enqueue_style( 'jquery-ui-regenthumbs', plugins_url( 'jquery-ui/redmond/jquery-ui-1.7.2.custom.css', __FILE__ ), array(), '1.7.2' );
	}

// Add a "Regenerate Thumbnails" link to the media row actions
	function add_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=regenerate-thumbnails&goback=1&ids=' . $post->ID ), 'regenerate-thumbnails' );
		$actions['regenerate_thumbnails'] = '<a href="' . esc_url( $url ) . '" title="' . esc_attr( __( "Regenerate the thumbnails for this single image", 'regenerate-thumbnails' ) ) . '">' . __( 'Regenerate Thumbnails', 'regenerate-thumbnails' ) . '</a>';

return $actions;
	}

// Add "Regenerate Thumbnails" to the Bulk Actions media dropdown
	function add_bulk_actions( $actions ) {
		$delete = false;
		if ( ! empty( $actions['delete'] ) ) {
			$delete = $actions['delete'];
			unset( $actions['delete'] );
		}

$actions['bulk_regenerate_thumbnails'] = __( 'Regenerate Thumbnails', 'regenerate-thumbnails' );

if ( $delete )
			$actions['delete'] = $delete;

return $actions;
	}

// Add new items to the Bulk Actions using Javascript
	// A last minute change to the "bulk_actions-xxxxx" filter in 3.1 made it not possible to add items using that
	function add_bulk_actions_via_javascript() {
		if ( ! current_user_can( $this->capability ) )
			return;
?>
		<script type="text/javascript">
			jQuery(document).ready(function($){
				$('select[name^="action"] option:last-child').before('<option value="bulk_regenerate_thumbnails"><?php echo esc_attr( __( 'Regenerate Thumbnails', 'regenerate-thumbnails' ) ); ?></option>');
			});
		</script>
<?php
	}

// Handles the bulk actions POST
	function bulk_action_handler() {
		if ( empty( $_REQUEST['action'] ) || ( 'bulk_regenerate_thumbnails' != $_REQUEST['action'] && 'bulk_regenerate_thumbnails' != $_REQUEST['action2'] ) )
			return;

if ( empty( $_REQUEST['media'] ) || ! is_array( $_REQUEST['media'] ) )
			return;

check_admin_referer( 'bulk-media' );

$ids = implode( ',', array_map( 'intval', $_REQUEST['media'] ) );

// Can't use wp_nonce_url() as it escapes HTML entities
		wp_redirect( add_query_arg( '_wpnonce', wp_create_nonce( 'regenerate-thumbnails' ), admin_url( 'tools.php?page=regenerate-thumbnails&goback=1&ids=' . $ids ) ) );
		exit();
	}

// The user interface plus thumbnail regenerator
	function regenerate_interface() {
		global $wpdb;

<div class="wrap regenthumbs">
	<h2>重新生成缩略图</h2>

<?php

// If the button was clicked
		if ( ! empty( $_POST['regenerate-thumbnails'] ) || ! empty( $_REQUEST['ids'] ) ) {
			// Capability check
			if ( ! current_user_can( $this->capability ) )
				wp_die( __( 'Cheatin’ uh?' ) );

// Form nonce check
			check_admin_referer( 'regenerate-thumbnails' );

// Create the list of image IDs
			if ( ! empty( $_REQUEST['ids'] ) ) {
				$images = array_map( 'intval', explode( ',', trim( $_REQUEST['ids'], ',' ) ) );
				$ids = implode( ',', $images );
			} else {
				// Directly querying the database is normally frowned upon, but all
				// of the API functions will return the full post objects which will
				// suck up lots of memory. This is best, just not as future proof.
				if ( ! $images = $wpdb->get_results( "SELECT ID FROM $wpdb->posts WHERE post_type = 'attachment' AND post_mime_type LIKE 'image/%' ORDER BY ID DESC" ) ) {
					echo '	<p>' . sprintf( __( "Unable to find any images. Are you sure <a href='%s'>some exist</a>?", 'regenerate-thumbnails' ), admin_url( 'upload.php?post_mime_type=image' ) ) . "</p></div>";
					return;
				}

// Generate the list of IDs
				$ids = array();
				foreach ( $images as $image )
					$ids[] = $image->ID;
				$ids = implode( ',', $ids );
			}

echo '';

$count = count( $images );

$text_goback = ( ! empty( $_GET['goback'] ) ) ? sprintf( __( 'To go back to the previous page, <a href="%s">click here</a>.', 'regenerate-thumbnails' ), 'javascript:history.go(-1)' ) : '';
			$text_failures = sprintf( __( 'All done! %1$s image(s) were successfully resized in %2$s seconds and there were %3$s failure(s). To try regenerating the failed images again, <a href="%4$s">click here</a>. %5$s', 'regenerate-thumbnails' ), "' + rt_successes + '", "' + rt_totaltime + '", "' + rt_errors + '", esc_url( wp_nonce_url( admin_url( 'tools.php?page=regenerate-thumbnails&goback=1' ), 'regenerate-thumbnails' ) . '&ids=' ) . "' + rt_failedlist + '", $text_goback );
			$text_nofailures = sprintf( __( 'All done! %1$s image(s) were successfully resized in %2$s seconds and there were 0 failures. %3$s', 'regenerate-thumbnails' ), "' + rt_successes + '", "' + rt_totaltime + '", $text_goback );
?>

// Create the progress bar
			$("#regenthumbs-bar").progressbar();
			$("#regenthumbs-bar-percent").html( "0%" );

// Stop button
			$("#regenthumbs-stop").click(function() {
				rt_continue = false;
				$('#regenthumbs-stop').val("<?php echo $this->esc_quotes( __( 'Stopping...', 'regenerate-thumbnails' ) ); ?>");
			});

// Clear out the empty list element that's there for HTML validation purposes
			$("#regenthumbs-debuglist li").remove();

// Called after each resize. Updates debug information and the progress bar.
			function RegenThumbsUpdateStatus( id, success, response ) {
				$("#regenthumbs-bar").progressbar( "value", ( rt_count / rt_total ) * 100 );
				$("#regenthumbs-bar-percent").html( Math.round( ( rt_count / rt_total ) * 1000 ) / 10 + "%" );
				rt_count = rt_count + 1;

if ( success ) {
					rt_successes = rt_successes + 1;
					$("#regenthumbs-debug-successcount").html(rt_successes);
					$("#regenthumbs-debuglist").append("<li>" + response.success + "</li>");
				}
				else {
					rt_errors = rt_errors + 1;
					rt_failedlist = rt_failedlist + ',' + id;
					$("#regenthumbs-debug-failurecount").html(rt_errors);
					$("#regenthumbs-debuglist").append("<li>" + response.error + "</li>");
				}
			}

// Called when all images have been processed. Shows the results and cleans up.
			function RegenThumbsFinishUp() {
				rt_timeend = new Date().getTime();
				rt_totaltime = Math.round( ( rt_timeend - rt_timestart ) / 1000 );

$('#regenthumbs-stop').hide();

if ( rt_errors > 0 ) {
					rt_resulttext = '<?php echo $text_failures; ?>';
				} else {
					rt_resulttext = '<?php echo $text_nofailures; ?>';
				}

$("#message").html("<p><strong>" + rt_resulttext + "</strong></p>");
				$("#message").show();
			}

// Regenerate a specified image via AJAX
			function RegenThumbs( id ) {
				$.ajax({
					type: 'POST',
					url: ajaxurl,
					data: { action: "regeneratethumbnail", id: id },
					success: function( response ) {
						if ( response !== Object( response ) || ( typeof response.success === "undefined" && typeof response.error === "undefined" ) ) {
							response = new Object;
							response.success = false;
							response.error = "<?php printf( esc_js( __( 'The resize request was abnormally terminated (ID %s). This is likely due to the image exceeding available memory or some other type of fatal error.', 'regenerate-thumbnails' ) ), '" + id + "' ); ?>";
						}

if ( response.success ) {
							RegenThumbsUpdateStatus( id, true, response );
						}
						else {
							RegenThumbsUpdateStatus( id, false, response );
						}

if ( rt_images.length && rt_continue ) {
							RegenThumbs( rt_images.shift() );
						}
						else {
							RegenThumbsFinishUp();
						}
					},
					error: function( response ) {
						RegenThumbsUpdateStatus( id, false, response );

if ( rt_images.length && rt_continue ) {
							RegenThumbs( rt_images.shift() );
						}
						else {
							RegenThumbsFinishUp();
						}
					}
				});
			}

RegenThumbs( rt_images.shift() );
		});
	// ]]>
	</script>
<?php
		}

// No button click? Display the form.
		else {
?>
	<form method="post" action="">
<?php wp_nonce_field('regenerate-thumbnails') ?>

<p>请先更新【媒体管理 -> 图片尺寸设置】中的缩略图大小，然后再重新生成所有图片。</p>

</form>
<?php
		} // End if button
?>
</div>

<?php
	}

// Process a single image ID (this is an AJAX handler)
	function ajax_process_image() {
		@error_reporting( 0 ); // Don't break the JSON result

header( 'Content-type: application/json' );

$id = (int) $_REQUEST['id'];
		$image = get_post( $id );

if ( ! $image || 'attachment' != $image->post_type || 'image/' != substr( $image->post_mime_type, 0, 6 ) )
			die( json_encode( array( 'error' => sprintf( __( 'Failed resize: %s is an invalid image ID.', 'regenerate-thumbnails' ), esc_html( $_REQUEST['id'] ) ) ) ) );

if ( ! current_user_can( $this->capability ) )
			$this->die_json_error_msg( $image->ID, __( "Your user account doesn't have permission to resize images", 'regenerate-thumbnails' ) );

$fullsizepath = get_attached_file( $image->ID );

if ( false === $fullsizepath || ! file_exists( $fullsizepath ) )
			$this->die_json_error_msg( $image->ID, sprintf( __( 'The originally uploaded image file cannot be found at %s', 'regenerate-thumbnails' ), '<code>' . esc_html( $fullsizepath ) . '</code>' ) );

@set_time_limit( 900 ); // 5 minutes per image should be PLENTY

$metadata = wp_generate_attachment_metadata( $image->ID, $fullsizepath );

if ( is_wp_error( $metadata ) )
			$this->die_json_error_msg( $image->ID, $metadata->get_error_message() );
		if ( empty( $metadata ) )
			$this->die_json_error_msg( $image->ID, __( 'Unknown failure reason.', 'regenerate-thumbnails' ) );

// If this fails, then it just means that nothing was changed (old value == new value)
		wp_update_attachment_metadata( $image->ID, $metadata );

die( json_encode( array( 'success' => sprintf( __( '"%1$s" (ID %2$s) was successfully resized in %3$s seconds.', 'regenerate-thumbnails' ), esc_html( get_the_title( $image->ID ) ), $image->ID, timer_stop() ) ) ) );
	}

// Helper to make a JSON error message
	function die_json_error_msg( $id, $message ) {
		die( json_encode( array( 'error' => sprintf( __( '"%1$s" (ID %2$s) failed to resize. The error message was: %3$s', 'regenerate-thumbnails' ), esc_html( get_the_title( $id ) ), $id, $message ) ) ) );
	}

// Helper function to escape quotes in strings for use in Javascript
	function esc_quotes( $string ) {
		return str_replace( '"', '\"', $string );
	}
}

// Start up this plugin
add_action( 'init', 'RegenerateThumbnails' );
function RegenerateThumbnails() {
	global $RegenerateThumbnails;
	$RegenerateThumbnails = new RegenerateThumbnails();
}