/wp-content/plugins/fpw-category-thumbnails/classes/fpw-category-thumbnails-class.php

<?php

//	prevent direct accesss

if ( ! defined( 'ABSPATH' ) )  

	die( 'Direct access to this script is not allowed!' );



//	plugin's main class

class fpwCategoryThumbnails {

	var	$fctOptions, $fptOptions;

	var $formSubmited;

	var $optionsUpdateOk;

	var $mapUpdateOk;

	var	$fctPath;

	var	$fctUrl;

	var	$fctVersion;

	var	$fctPage, $fptPage;

	var	$fctLocale;

	var	$translationURL;

	var	$translationPath;

	var $translationStatus;

	var $translationResponse;

	var	$wpVersion;

	var $mapArray;

	var	$categoryListTable;

	var	$showRestore;

	var $javaScriptEnabled;

	

	//	constructor

	function __construct( $path, $version ) {

		global $wp_version;

		

		//	set plugin's path

		$this->fctPath = $path;

		

		//	set plugin's url

		$this->fctUrl = WP_PLUGIN_URL . '/fpw-category-thumbnails';

		

		//	set version

		$this->fctVersion = $version;

		

		//	set WP version

		$this->wpVersion = $wp_version;

		

		$this->fctLocale = get_locale();



		//	set translation URL

		$this->translationURL = 'http://svn.wp-plugins.org/fpw-category-thumbnails/translations/' . 

								$this->fctVersion . '/fpw-category-thumbnails-' . $this->fctLocale . '.mo';

								

		//	set translation path

		$this->translationPath = $this->fctPath . '/languages/fpw-category-thumbnails-' . $this->fctLocale . '.mo';

		

		//	initialize $showRestore

		$this->showRestore = false;



		//	read plugin's options

		$this->fctOptions = $this->getOptions();

		

		//	actions and filters

		add_action( 'init', array( &$this, 'init' ) );

        add_action( 'after_setup_theme', array( &$this, 'addThemeSupportForThumbnails' ) );

		add_action( 'save_post', array( &$this, 'addThumbnailToPost' ), 10, 2 );

		add_action( 'after_plugin_row_fpw-category-thumbnails/fpw-category-thumbnails.php', array( &$this, 'afterPluginMeta' ), 10, 2 );

		add_action( 'admin_bar_menu', array( &$this, 'pluginToAdminBar' ), 1010 );

		add_action( 'admin_menu', array( &$this, 'adminMenu' ) );

        

		register_activation_hook( $this->fctPath . '/fpw-category-thumbnails.php', array( &$this, 'uninstallMaintenance' ) );

		

		//	AJAX group of actions

		add_action( 'wp_ajax_fpw_fs_get_file', array( &$this, 'fpw_fs_get_file_ajax' ) );

		add_action( 'wp_ajax_fpw_ct_update' , array( &$this, 'fpw_ct_update_ajax' ) );

		add_action( 'wp_ajax_fpw_ct_apply', array( &$this, 'fpw_ct_apply_ajax' ) );

		add_action( 'wp_ajax_fpw_ct_remove', array( &$this, 'fpw_ct_remove_ajax' ) );

		add_action( 'wp_ajax_fpw_ct_restore', array( &$this, 'fpw_ct_restore_ajax' ) );

		add_action( 'wp_ajax_fpw_ct_language', array( &$this, 'fpw_ct_language_ajax' ) );



		add_filter( 'plugin_action_links_fpw-category-thumbnails/fpw-category-thumbnails.php', array( &$this, 'pluginLinks' ), 10, 2);

		add_filter( 'plugin_row_meta', array( &$this, 'pluginMetaLinks'), 10, 2 );

		add_filter('manage_edit-category_columns', array( &$this, 'fpw_category_columns_head' ) );

		add_filter('manage_category_custom_column', array( &$this, 'fpw_custom_category_column_content' ), 10, 3 );

	}

	

	//	add theme support for thumbnails if not provided by current theme already

	function addThemeSupportForThumbnails() {

		if ( !current_theme_supports( 'post-thumbnails' ) )

			add_theme_support( 'post-thumbnails' );

	}

	

	//	set heading for custom column 'Thumbnail' - Categories admin screen

	function fpw_category_columns_head( $defaults ) {

		$defaults[ 'thumbnail_column' ]  = __( 'Thumbnail', 'fpw-category-thumbnails' );

		return $defaults;

	}

	

	//	show value of custom column 'Thumbnail' - Categories admin screen

	function fpw_custom_category_column_content( $data, $column, $id ) {

		if ( $column == 'thumbnail_column' ) {

			$map = get_option( 'fpw_category_thumb_map' );

			$thumbnail_id = '0';

			if ( array_key_exists( $id, $map ) ) {

    	    	$value = $map[ $id ];

				$preview_size = 'thumbnail';

				if ( 'ngg-' == substr( $value, 0, 4 ) ) {

					if ( class_exists( 'nggdb' ) ) {

						$thumbnail_id = substr( $value, 4 );

						$picture = nggdb::find_image($thumbnail_id);

						if ( !$picture ) {

							return 	'<span style="font-size: large; color: red">' .

									__( 'NextGen Gallery: picture not found!', 'fpw-category-thumbnails' ) . '</span>';

						} else {

							return '<img src="' . $picture->thumbURL . '" />';

						}

					} else {

						return 	'<span style="font-size: large; color: red">' .

								__( 'NextGen Gallery: not active!', 'fpw-category-thumbnails' ) . '</span>';

					}

				} else {

					if ( 'Author' === $value ) {

						return '[ ' . __( 'Picture', 'fpw-category-thumbnails' ) . ' ]';

					} else {

						if ( wp_attachment_is_image( $value ) ) {

							return wp_get_attachment_image( $value, $preview_size );

						} else {

							return 	'<span style="font-size: large; color: red">' .

								__( 'Media Library: picture not found!', 'fpw-category-thumbnails' ) . '</span>';

						}

					}

				}

    	    } else {

				return '';

			}

    	}

    	return $data;

	}

	

	//	check translation file availability

	function translationAvailable() {

		

    	//	if language file exist, do not load it again

		if ( is_readable( $this->translationPath ) ) 

			return 'installed';



		if ( version_compare( $this->wpVersion, '3.6.0', '<' ) ) {

			$this->translationResponse = wp_remote_get( $this->translationURL, array( 'timeout' => 300 ) );

		} else {

			$this->translationResponse = wp_safe_remote_get( $this->translationURL, array( 'timeout' => 300 ) );

		}



		//	if no translation file exists exit the check

		if ( is_wp_error( $this->translationResponse ) || $this->translationResponse[ 'response' ][ 'code' ] != '200' )

			return 'not_exist';

		

		return 'available';		

	}

    

	//	register plugin's textdomain

	function init() {

		load_plugin_textdomain( 'fpw-category-thumbnails', false, 'fpw-category-thumbnails/languages/' );



		if ( !( 'en_US' == $this->fctLocale ) ) 

			$this->translationStatus = $this->translationAvailable();

	} 



	//	register admin menu

	function adminMenu() {

		$page_title = __( 'FPW Category Thumbnails', 'fpw-category-thumbnails' );

		$menu_title = __( 'FPW Category Thumbnails', 'fpw-category-thumbnails' );

		$this->fctPage = add_theme_page( $page_title, $menu_title, 'manage_options', 

							'fpw-category-thumbnails', array( &$this, 'fctSettings' ) );

		

		add_action( 'load-' . $this->fctPage, array( &$this, 'help' ) );

		add_action( 'load-' . $this->fctPage, array( &$this, 'addScreenOptions' ) );



		add_action( 'admin_enqueue_scripts', array( &$this, 'enqueueScripts' ) );



		add_action( 'admin_enqueue_scripts', array( &$this, 'enqueuePointerScripts' ) );

	}



	//	register styles, scripts, and localize javascript

	function enqueueScripts( $hook ) {

		if ( ( $this->fctPage == $hook ) || ( 'media-upload-popup' == $hook ) ) {

			require_once $this->fctPath . '/scripts/enqueuescripts.php';

		}

	}

	

	//	enqueue pointer scripts

	function enqueuePointerScripts( $hook ) {

		if ( $this->fctPage == $hook )

			require_once $this->fctPath . '/scripts/enqueuepointerscripts.php';

	}



	// 	AJAX handler for pointer

	function custom_print_footer_scripts() {

		$pointer = 'fpwfct' . str_replace( '.', '', $this->fctVersion );

    	$pointerContent  = '<h3>' . esc_js( __( "What's new in this version?", 'fpw-category-thumbnails' ) ) . '</h3>';

		$pointerContent .= '<li style="margin-left:25px;margin-top:20px;margin-right:25px;list-style:square">' . 

						   esc_js( __( "Added no javascript form submission handler", 'fpw-category-thumbnails' ) ) . '</li>';

    	?>

    	<script type="text/javascript">

    	// <![CDATA[

    		jQuery(document).ready( function($) {

        		$('#fct-settings-title').pointer({

        			content: '<?php echo $pointerContent; ?>',

        			position: 'top',

            		close: function() {

						jQuery.post( ajaxurl, {

							pointer: '<?php echo $pointer; ?>',

							action: 'dismiss-wp-pointer'

						});

            		}

				}).pointer('open');

			});

    	// ]]>

    	</script>

    	<?php

	}

	

	//	add screen options

	function addScreenOptions() {

		$option = 'per_page';

		

		$categories_per_page = get_user_option( 'edit_category_per_page', get_current_user_id() );

		if ( !$categories_per_page )

			$categories_per_page = 10;

 		

		$args = array(

			'label'		=> _n( 'Category', 'Categories', $categories_per_page, 'fpw-category-thumbnails' ),

			'default'	=> 10,

			'option'	=> 'edit_category_per_page',

		);

 

		add_screen_option( $option, $args );

		add_filter( 'load-' . $this->fctPage, array( &$this, 'setScreenOption'), 10, 3 );

	}



	//	redisplay table after change of categories per page

	function setScreenOption( $status, $option, $value ) {

		if ( 'edit_category_per_page' == $option ) {

			unset( $this->categoryListTable );

			$this->categoryListTable = new fpw_Category_Thumbnails_Table( $this->mapArray ); 

			$this->categoryListTable->prepare_items();

			$this->categoryListTable->display();

			return $value;

		}

	}



	//	contextual help

	function help() {

		require_once $this->fctPath . '/help/help.php';

	}

	

	// AJAX wrapper to get image HTML

	function fpw_fs_get_file_ajax() {

		if ( defined("DOING_AJAX") && DOING_AJAX ) 

			require_once $this->fctPath . '/ajax/getimageid.php';

	}

	

	// AJAX wrapper to perform options update

	function fpw_ct_update_ajax() {

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )

			require_once $this->fctPath . '/ajax/update.php';

	}



	// AJAX wrapper to perform apply mapping tasks

	function fpw_ct_apply_ajax() {

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )

			require_once $this->fctPath . '/ajax/apply.php';

	}



	// AJAX wrapper to perform remove thumbnails

	function fpw_ct_remove_ajax() {

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )

			require_once $this->fctPath . '/ajax/remove.php';

	}



	// AJAX wrapper to perform restore thumbnails

	function fpw_ct_restore_ajax() {

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )

			require_once $this->fctPath . '/ajax/restore.php';

	}



	// AJAX wrapper to perform translation file loading

	function fpw_ct_language_ajax() {

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX )

			require_once $this->fctPath . '/ajax/language.php';

	}



	//	add update information after plugin meta

	function afterPluginMeta( $file, $plugin_data ) {

		$current = get_site_transient( 'update_plugins' );

		if ( !isset( $current -> response[ $file ] ) ) 

			return false;

		$url = "http://fw2s.com/fpwcatthumbsupdate.txt";

		$update = wp_remote_fopen( $url );

		echo '<tr class="plugin-update-tr"><td colspan="3" class="plugin-update"><div class="update-message">' . 

			$update . '</div></td></tr>';

	}



	//	add link to Donation to plugins meta

	function pluginMetaLinks( $links, $file ) {

		if ( 'fpw-category-thumbnails/fpw-category-thumbnails.php' == $file ) 

			$links[] = '<a href="http://fw2s.com/payments-and-donations/" target="_blank">' . __( "Donate", "fpw-category-thumbnails" ) . '</a>';

		return $links;

	}

	

	//	add link to settings page in plugins list

	function pluginLinks( $links, $file ) {

   		$settings_link = '<a href="' . site_url( '/wp-admin/' ) . 'themes.php?page=fpw-category-thumbnails">' . __( 'Settings', 'fpw-category-thumbnails' ) . '</a>';

		array_unshift( $links, $settings_link );

    	return $links;

	}

	

	//	uninstall file maintenance

	function uninstallMaintenance() {

		if ( $this->fctOptions[ 'clean' ] ) { 

			if ( file_exists( $this->fctPath . '/uninstall.txt' ) ) 

				rename( $this->fctPath . '/uninstall.txt', $this->fctPath . '/uninstall.php' );

		} else {

			if ( file_exists( $this->fctPath . '/uninstall.php' ) ) 

				rename( $this->fctPath . '/uninstall.php', $this->fctPath . '/uninstall.txt' );

		}

	}	



	//	add plugin to admin bar	

	function pluginToAdminBar() {

		if ( current_user_can( 'manage_options' ) ) {

			global 	$wp_admin_bar;

			

			$main = array(

				'id' => 'fpw_plugins',

				'title' => __( 'FPW Plugins', 'fpw-category-thumbnails' ),

				'href' => '#' );



			$subm = array(

				'id' => 'fpw_bar_category_thumbnails',

				'parent' => 'fpw_plugins',

				'title' => __( 'FPW Category Thumbnails', 'fpw-category-thumbnails' ),

				'href' => get_admin_url() . 'themes.php?page=fpw-category-thumbnails' );



			$addmain = ( is_array( $wp_admin_bar->get_node( 'fpw_plugins' ) ) ) ? false : true;



			if ( $addmain )

				$wp_admin_bar->add_menu( $main );

			$wp_admin_bar->add_menu( $subm );

		}

	}

	

	private function doApplyMapping() {

		$map = get_option( 'fpw_category_thumb_map' );



		if ( $map )



			while ( strlen( key( $map ) ) ) {

				$catid = key($map);

				$parg = array(

					'numberofposts' => -1,

					'nopaging' => true,

					'category' => $catid,

					'post_type' => 'any' );

				$posts = get_posts( $parg );



				foreach ( $posts as $post ) {

					$post_id = $post->ID;

					//	make sure this is not a revision nor draft

					if ( 'publish' === $post->post_status ) 

						$this->addThumbnailToPost( $post_id, $post );

				}



				next($map);

			}	

	}

	

	private function doRemoveThumbnails() {

		$deletedThumbnails = array();



		$parg = array(

			'numberofposts' => -1,

			'nopaging' => true,

			'post_type' => 'any' );



		$posts = get_posts( $parg );



		foreach ( $posts as $post ) {

			$post_id = absint( $post->ID );

			//	make sure this is not a revision

			if ( 'publish' === $post->post_status ) {

				$value = get_post_meta( $post_id, '_thumbnail_id', true );

				if ( !empty( $value ) ) {

					$deletedThumbnails[ $post_id ] = ( string ) $value;

					delete_post_meta( $post_id, '_thumbnail_id' );

				}

			}

		}



		if ( 0 !== count( $deletedThumbnails ) ) {

			update_option( 'fpw_category_thumb_bkp', $deletedThumbnails );

			return true;

		}

		

		return false;

	}

	

	private function doRestoreThumbnails() {

		$backedupThumbnails = get_option( 'fpw_category_thumb_bkp', false );



		foreach ( $backedupThumbnails as $key => $value ) {

			$post = get_post( $key );

	

			//	make sure this is not a revision

			if ( 'publish' === $post->post_status )

				update_post_meta( $key, '_thumbnail_id', $value );

		}



		delete_option( 'fpw_category_thumb_bkp' );

	}

	

	private function doGetLanguage() {

		if ( 'not_exist' == $this->translationStatus ) {

			$m = __( 'Language file for this version is not yet available.', 'fpw-category-thumbnails' );

		} elseif ( 'installed' == $this->translationStatus ) {

			$m = __( 'Language file is already installed.', 'fpw-category-thumbnails' );

		} else {

			$handle = @fopen( $this->translationPath, 'wb' );

			fwrite( $handle, $this->translationResponse[ 'body' ] );

			fclose($handle);

			$this->translationStatus = 'installed';

			$m = __( 'Language file downloaded successfully. It will be applied as soon as this page is reloaded.', 'fpw-category-thumbnails' );

		}

		return $m;			

	}



	//	plugin's Settings page

	function fctSettings() {

	

		$postsFound = false;

		$langMessage = '';

	

		//	get all categories

		$categories	= $this->getAllCategories();

		

		//	get assignments array

		$assignments = $this->getAssignmentsArray( $categories );

		$assignments = $this->updateMapping( $assignments );

		

		//	check for no JavaScript form submission

		$this->formSubmited =

			(	isset( $_POST[ 'submit-update' ] ) || isset( $_POST[ 'submit-apply' ] ) || 

				isset( $_POST[ 'submit-remove' ] ) || isset( $_POST[ 'submit-restore' ] ) || 

				isset( $_POST[ 'submit-language' ] ) );

				

		if ( $this->formSubmited ) {



			$this->fctOptions[ 'clean' ] = isset( $_POST[ 'cleanup' ] );

			$this->fctOptions[ 'donotover' ] = isset( $_POST[ 'donotover' ] );

			$this->fctOptions[ 'fpt'] = isset( $_POST[ 'fpt' ] );



			$this->optionsUpdateOk = update_option( 'fpw_category_thumb_opt', $this->fctOptions );



			//	NO JAVASCRIPT FORM SUBMISSION HANDLER

				

			if ( isset( $_POST['submit-update'] ) ) {



				if ( $this->optionsUpdateOk ) 

					$this->uninstallMaintenance();

			}

		

			if ( isset( $_POST['submit-apply'] ) ) {

				$this->doApplyMapping();

			}

		

			if ( isset( $_POST['submit-remove'] ) ) {

				$postsFound = $this->doRemoveThumbnails();

			}

		

			if ( isset( $_POST['submit-restore'] ) ) {

				$this->doRestoreThumbnails();

			}

		

			if ( isset( $_POST['submit-language'] ) ) {

				$langMessage = $this->doGetLanguage();

			}

		

			//	END OF NO JAVASCRIPT FORM SUBMISSION HANDLER

		}

		

		//	get removed thumbnails backup

		$backedupThumbnails = get_option( 'fpw_category_thumb_bkp', false );

		

		if ( false != $backedupThumbnails )

			$this->showRestore = true;



		if ( $this->formSubmited ) {

			if ( !isset( $_POST[ 'fpw-fct-nonce' ] ) ) 

				die( '<br />&nbsp;<br /><p style="padding-left: 20px; color: red"><strong>' . 

					 __( 'You did not send any credentials!', 'fpw-category-thumbnails' ) . '</strong></p>' );

			if ( !wp_verify_nonce( $_POST[ 'fpw-fct-nonce' ], 'fpw-fct-nonce' ) ) 

				die( '<br />&nbsp;<br /><p style="padding-left: 20px; color: red;"><strong>' . 

					 __( 'You did not send the right credentials!', 'fpw-category-thumbnails' ) . '</strong></p>' );

		} 



		/*	------------------------------

		Settings page HTML starts here

		--------------------------- */



		echo '<div class="wrap">';

		

		$displayAttr = ( $this->fctOptions[ 'fpt' ] ) ? '' : 'display: none';

		

		$lt43 = version_compare( $this->wpVersion, '4.3', '<' );

		

		echo '<h' . ( $lt43 ? '2' : '1' ) . 

			 ' id="fct-settings-title">' . __( 'FPW Category Thumbnails', 'fpw-category-thumbnails' ) .

			 ' <a style="' . $displayAttr . '" id="fpt-link" class="' . ( $lt43 ? 'add-new-h2' : 'page-title-action' ) . '" href="' . get_admin_url() . 

			 '?page=fpw-post-thumbnails">' . __( 'FPW Post Thumbnails', 'fpw-category-thumbnails' ) . 

			 '</a></h' . ( $lt43 ? '2' : '1' ) . '>';

			 

		//	check if any of submit buttons was pressed

		if ( $this->formSubmited ) {

			if ( isset( $_POST['submit-update'] ) ) {

				if ( $this->optionsUpdateOk || $this->mapUpdateOk ) { 

					echo '<div id="message" class="updated fade"><p><strong>' . __( 'Changes saved successfully.', 'fpw-category-thumbnails' ) . '</strong></p></div>';

				} else {

					echo '<div id="message" class="updated fade"><p><strong>' . __( 'No changes detected.', 'fpw-category-thumbnails' ) . '</strong></p></div>';

				}

			} elseif ( isset( $_POST['submit-apply'] ) ) {

				echo '<div id="message" class="updated fade"><p><strong>' . __( 'Added thumbnails to existing posts successfully.', 'fpw-category-thumbnails' ) . '</strong></p></div>';

			} elseif ( isset( $_POST['submit-remove'] ) ) {

				echo '<div id="message" class="updated fade"><p><strong>';

				if ( $postsFound ) {

					echo __( 'Thumbnails removed from all posts successfully. Backup created.', 'fpw-category-thumbnails' );

				} else {

					echo __( 'No thumbnails to be removed found.', 'fpw-category-thumbnails' );

				}

				echo '</strong></p></div>';

			} elseif ( isset( $_POST['submit-restore'] ) ) {

				echo '<div id="message" class="updated fade"><p><strong>' . __( 'All thumbnails restored from the backup successfully.', 'fpw-category-thumbnails' ) . '</strong></p></div>';

			} elseif ( isset( $_POST['submit-language'] ) ) {

				echo '<div id="message" class="updated"><p><strong>' . $langMessage . '</strong></p></div>';

			}

		}

		

		//	the form starts here

		echo '<div>';

		echo '<form name="fpw_cat_thmb_form" action="?page=fpw-category-thumbnails" method="post">';

		

		//	protect this form with nonce

		echo '<input name="fpw-fct-nonce" type="hidden" value="' . wp_create_nonce( 'fpw-fct-nonce' ) . '" />';



		//	options section

		echo '<div id="fpw-fct-options" style="position: relative; margin-top: 5px;">';

		

		//	do not overwrite checkbox

		echo '<input type="checkbox" class="option-group" id="box-donotover" name="donotover" value="donotover"';

		if ( $this->fctOptions[ 'donotover' ] ) 

			echo ' checked';

		echo '> ' . __( 'Do not overwrite if post / page has thumbnail assigned already', 'fpw-category-thumbnails' ) . '<br />';



		//	cleanup checkbox

		echo '<input type="checkbox" class="option-group" id="box-cleanup" name="cleanup" value="cleanup"';

		if ( $this->fctOptions[ 'clean' ] ) 

			echo ' checked';

		echo '> ' . __( "Remove plugin's data from database on uninstall", 'fpw-category-thumbnails' ) . '<br />';



		//	enable FPW Post Thumbnails plugin checkbox

		echo '<input type="checkbox" class="option-group" id="box-fpt" name="fpt" value="fpt"';

		if ( $this->fctOptions[ 'fpt' ] ) 

			echo ' checked';

		echo '> ' . __( 'Enable FPW Post Thumbnails', 'fpw-category-thumbnails' ) . '<br />';



		//	end of options section

		echo '</div>';

		

		//	notification division for AJAX

		echo 	'<div id="message" class="updated" style="position: absolute; ' . 

				'display: none; z-index: 10;margin-top: 60px;"><p>&nbsp;</p></div>';

				

		require_once $this->fctPath . '/code/table.php';



		//	end of form

		echo '</form>';

		echo '</div>';

		echo '</div>';

	}

	

	//	update mapping array

	function updateMapping( $a ) {

		$map = get_option( 'fpw_category_thumb_map' );

		foreach ( $_POST as $key => $value ) {

			if ( ( 'val-for-id-' == substr( $key, 0, 11 ) ) && !( '-field_preview-size' == substr( $key, strlen( $key ) - 19, 19 ) ) ) {

				$replace = array( 'val-for-id-', '-field' );

				$with = array( '', '' );

				$id = str_replace( $replace, $with, $key );

				$a[ $id ] = $value;

				$map[ $id ] = $value;

			} 

		}

		$map_filtered = array();

		foreach( $map as $key => $value ) 

   			if( $value != '0' ) 

       			$map_filtered[ $key ] = $value;

       	$this->mapUpdateOk = ( update_option( 'fpw_category_thumb_map', $map_filtered ) );

		return $a;

	}

	

	//	build categories' array

	function getAllCategories() {

		$categories = array();

	

		$cats0 = get_categories('hide_empty=0&orderby=name&parent=0');



		foreach ( $cats0 as $cats00 ) {

    		array_push( $categories, array(0,$cats00) );

    		$cats1 = get_categories('hide_empty=0&orderby=name&parent='.$cats00->cat_ID);



    		foreach ( $cats1 as $cats10 ) {

        		array_push( $categories, array(1,$cats10) );

        		$cats2 = get_categories('hide_empty=0&orderby=name&parent='.$cats10->cat_ID);



        		foreach ( $cats2 as $cats20 ) {

            		array_push( $categories, array(2,$cats20) );

            		$cats3 = get_categories('hide_empty=0&orderby=name&parent='.$cats20->cat_ID);



            		foreach ( $cats3 as $cats30 ) {

                		array_push( $categories, array(3,$cats30) );

                		$cats4 = get_categories('hide_empty=0&orderby=name&parent='.$cats30->cat_ID);



                		foreach ( $cats4 as $cats40 ) {

                    		array_push( $categories, array(4,$cats40) );

                    		$cats5 = get_categories('hide_empty=0&orderby=name&parent='.$cats40->cat_ID);



                    		foreach ( $cats5 as $cats50 ) {

                        		array_push( $categories, array(5,$cats50) );

                    		}

                		}

            		}

        		}

    		}

		}

		

		reset( $categories );

		

		return $categories;	

	}



	//	build assignments array

	function getAssignmentsArray( $c ) {

		$assignments	= array();



		foreach ( $c as $category ) {

			$assignments[ $category[1] -> cat_ID ] = 0;

		}



		//	get assignments from database

		$opt = get_option( 'fpw_category_thumb_map' );



		// update $assignments array with values from database

		if ( $opt ) {

	    	reset( $assignments );

			while ( strlen( key( $assignments ) ) ) {

				if ( array_key_exists( key( $assignments ), $opt ) ) {

					$assignments[ key( $assignments ) ] = $opt[ key( $assignments ) ];	

				}

				next( $assignments );

			}

		}

		

		reset( $assignments );

		

		return $assignments;	

	}

	

	//	get plugin's options ( build if not exists )

	function getOptions() {

	

		$needs_update = FALSE;

		$opt = get_option( 'fpw_category_thumb_opt' );

	

		if ( !is_array( $opt ) ) {

			$needs_update = TRUE;

			$opt = array( 

				'clean'		=> FALSE,

				'donotover' => FALSE,

				'fpt'		=> FALSE );

		} else {

			if ( !array_key_exists( 'clean', $opt ) || !is_bool( $opt[ 'clean' ] ) ) { 

				$needs_update = TRUE;

				$opt[ 'clean' ] = FALSE;

			}

			if ( !array_key_exists( 'donotover', $opt ) || !is_bool( $opt[ 'donotover' ] ) ) { 

				$needs_update = TRUE;

				$opt[ 'donotover' ] = FALSE;

			}

			if ( !array_key_exists( 'fpt', $opt ) || !is_bool( $opt[ 'fpt' ] ) ) { 

				$needs_update = TRUE;

				$opt[ 'fpt' ] = FALSE;

			}

			if ( $needs_update ) 

				update_option( 'fpw_category_thumb_opt', $opt );

		}

		return $opt;

	}



	/*	------------------------------------------------------------------

	Main action - sets the value of post's _thumbnail_id based on category

	assignments

	------------------------------------------------------------------- */

	function addThumbnailToPost( $post_id, $post = NULL ) {

		if ( NULL === $post ) 

			return;

		//	we don't want to apply changes to post's revision or drafts

		if ( ( 'revision' == $post->post_type ) || ( 'draft' == $post->post_status ) ) 

			return;

		//	this is actual post

		$thumb_id = get_post_meta( $post_id, '_thumbnail_id', TRUE );

		$do_notover = get_option( 'fpw_category_thumb_opt' );

		if ( $do_notover )

			$do_notover = $do_notover[ 'donotover' ]; 

		$map = get_option( 'fpw_category_thumb_map' );

		if ( $map ) {

			$cat = get_the_category( $post_id );

			foreach ( $cat as $c ) {

				if ( $post->post_date === $post->post_modified ) {

					//	in case of a new post we have to ignore setting of $do_notover flag

					//	as the thumbnail of default category will be there already

					if ( array_key_exists( $c->cat_ID, $map ) )

						if ( $map[ $c->cat_ID ] === 'Author' ) {

							$auth_pic_id = self::getAuthorsPictureID( $post->post_author );

							if ( '0' != $auth_pic_id ) 

								update_post_meta( $post_id, '_thumbnail_id', $auth_pic_id );

						} else { 

							update_post_meta( $post_id, '_thumbnail_id', $map[ $c->cat_ID ] );

						}

				} else {

					//	modified post - observe $do_notover flag

					if ( array_key_exists( $c->cat_ID, $map ) ) 

						if ( !( $do_notover ) ) {

							if ( $map[ $c->cat_ID ] === 'Author' ) {

								$auth_pic_id = self::getAuthorsPictureID( $post->post_author );

								if ( '0' != $auth_pic_id )

									 update_post_meta( $post_id, '_thumbnail_id', $auth_pic_id );

							} else {

								update_post_meta( $post_id, '_thumbnail_id', $map[ $c->cat_ID ] );

							}

						} else {

							if ( '' == $thumb_id )

								if ( $map[ $c->cat_ID ] === 'Author' ) {

									 $auth_pic_id = self::getAuthorsPictureID( $post->post_author );

									 if ( '0' != $auth_pic_id )

									 	update_post_meta( $post_id, '_thumbnail_id', $auth_pic_id );

								} else {

									update_post_meta( $post_id, '_thumbnail_id', $map[ $c->cat_ID ] );

								}

						}

				}

				$thumb_id = get_post_meta( $post_id, '_thumbnail_id', TRUE );

  			}

		}

	}

	

	//	get author's picture id - helper function

	private static function getAuthorsPictureID( $author_id ) {

		global $wpdb;

		$pic_id = 0;

		$all_media = $wpdb->get_results( "SELECT DISTINCT * FROM " . $wpdb->prefix . "posts " .

			"WHERE post_type = 'attachment' AND guid LIKE '%author_" . $author_id . ".jpg%' ORDER " .

			"BY post_date DESC" );

		if ( 0 < count( $all_media ) ) {

			$obj = $all_media[0];

			$pic_id	= $obj->ID;

		} else {

			$active_plugins = get_option( 'active_plugins' );

			$length = count( $active_plugins );

			$nextGenActive = FALSE;

			$i = 0;

			while ( $i < $length ) {

				if ( 0 < strpos( $active_plugins[ $i ], 'nggallery.php' ) ) {

					$nextGenActive = TRUE;

					$i = $length;

				}

				$i++;

			}

			if ( $nextGenActive ) {

				$tmp = $wpdb->get_results( "SELECT DISTINCT * FROM " . $wpdb->prefix . "ngg_gallery WHERE slug = 'authors'" );

				if ( 0 < count( $tmp ) ) {

					$obj = $tmp[0];

					$galleryID = $obj->gid;

					$tmp = $wpdb->get_results( "SELECT DISTINCT * FROM " . $wpdb->prefix . "ngg_pictures " .

						"WHERE galleryid = " . $galleryID . " AND filename LIKE '%" . $author_id . ".jpg%'" );

					if ( 0 < count( $tmp ) ) {

						$obj = $tmp[0];

						$pic_id = 'ngg-' . $obj->pid;

					}

				}

			}

		}	

		return $pic_id;

	}

}