Merge branch 'release/1.0'

CHANGELOG.txt

@@ -0,0 +1,5 @@
+# CF GUID-Fix Changelog
+
+## 1.0
+
+- Initial Release of the Plugin

cf-guid-fix.php

@@ -0,0 +1,204 @@
+<?php
+
+/*
+Plugin Name: CF GUID-Fix 
+Plugin URI: http://crowdfavorite.com/wordpress/plugins/cf-guid-fix/ 
+Description: Correct duplicate GUID values created with versions of WordPress that exhibited a <a href="http://core.trac.wordpress.org/ticket/15041">non-unique GUID bug</a>.
+Version: 1.0 
+Author: Crowd Favorite
+Author URI: http://crowdfavorite.com
+*/
+
+class CF_Guid_Fix {
+	// For < 3.1 compatibility
+	function CF_Guid_Fix() {
+		$this->__construct();
+	}
+
+	function __construct() {
+		$this->menu_page_slug = 'cf_guid_fix';
+		$this->page_url = admin_url('tools.php?page='.$this->menu_page_slug);
+		$this->errors = array();
+		$this->error_msgs = array(
+			'1' => __('Could not create index on your posts table for the `guid` column', 'cf_guid_fix'),
+			'2' => __('Could not update a post&rsquo;s GUID', 'cf_guid_fix'),
+			'3' => __('Could not remove the index from `guid`', 'cf_guid_fix'),
+		);
+	}
+
+	function add_actions() {
+		add_action('admin_init', array($this, 'admin_init'));
+		add_action('admin_menu', array($this, 'register_admin_menu'));
+		add_filter('plugin_action_links', array($this, 'plugin_action_links'), 10, 2);
+	}
+
+	function plugin_action_links($links, $file) {
+		$plugin_file = basename(__FILE__);
+		if (basename($file) == $plugin_file) {
+			$tools_link = '<a href="'.$this->page_url.'">'.__('Run GUID-fix', 'cf_guid_fix').'</a>';
+			array_unshift($links, $tools_link);
+		}
+		return $links;
+	}
+
+	function register_admin_menu() {
+		add_submenu_page(
+			'tools.php', // parent slug
+			'CF GUID-Fix', // page title
+			'CF GUID-Fix', // menu title
+			'manage_options', // capability
+			$this->menu_page_slug, // menu item slug
+			array($this, 'output_admin_page') // callback function
+		);
+	}
+
+	function output_admin_page() {
+		?>
+		<div class="wrap">
+			<?php screen_icon(); ?>
+			<h2><?php _e('CF GUID-Fix', 'cf_guid_fix'); ?></h2>
+			<?php 
+			if (isset($_GET['success'])) {
+				?>
+				<div class="updated"><p><?php _e('Post GUIDs are now unique! <b>You should now disable and remove this plugin.</b>', 'cf_guid_fix'); ?></p></div>
+				<?php 
+			}
+			else if (isset($_GET['error'])) {
+				$error_str = $_GET['error'];
+				$error_nums = explode(',', $error_str);
+				?>
+				<div class="error">
+					<?php
+					foreach ($error_nums as $num) {
+						echo '<p>'.esc_html($this->error_msgs[intval($num)]).'</p>';
+					}
+					?>
+				</div>
+				<?php 
+			}
+			?>
+			<p class="help"><strong><?php _e('What does this plugin do?', 'cf_guid_fix'); ?></strong> <?php _e('Corrects duplicate GUID values created with versions of WordPress that exhibited a <a href="http://core.trac.wordpress.org/ticket/15041">non-unique GUID bug</a>.', 'cf_guid_fix'); ?></p>
+			<p class="instructions"><?php _e('Clicking the button below runs the plugin to ensure your guids are unique.', 'cf_guid_fix'); ?></p>
+			<form name="cf_guid_fix_settings_form" action="<?php echo $this->page_url; ?>" method="post">
+				<input type="hidden" name="cf_action" id="cf_action" value="guid_fix" />
+				<button type="submit" class="button-primary"><?php _e('Fix Your GUIDs', 'cf_guid_fix'); ?></button>
+				<?php wp_nonce_field('cf_guid_fix_run'); ?>
+			</form>
+		</div>
+		<?php
+	}
+
+	function admin_init() {
+		if (isset($_POST['cf_action'])) {
+			switch ($_POST['cf_action']) {
+				case 'guid_fix':
+					// Validate request and nonce
+					if (!check_admin_referer('cf_guid_fix_run')) {
+						error_log('Unauthorized Request for CF GUID Fix Plugin');
+						wp_die(__('You should not be here.', 'cf_guid_fix'));
+					}
+
+					$this->fix_guids();
+					if (empty($this->errors)) {
+						wp_redirect(add_query_arg(array('success' => ''), $this->page_url));
+					}
+					else {
+						wp_redirect(add_query_arg(array('error' => implode(',', $this->errors)), $this->page_url));
+					}
+					exit;
+				break;
+			}
+		}
+	}
+
+	private function fix_guids() {
+		global $wpdb;
+
+		// add index on GUID column
+		$r = $wpdb->query("
+			ALTER TABLE $wpdb->posts
+			ADD INDEX (guid)
+		");
+
+		// Error Handling
+		if ($r === false) {
+			$this->add_error(1);
+		}
+
+	// find non-unique GUID values
+
+	// NOTE: not including revisions since that's a whole other mess to 
+	// try to get the numbering right if we change the GUID
+
+	// this gets the GUIDs
+	// 		SELECT guid
+	// 		FROM $wpdb->posts
+	// 		WHERE post_type != 'revision'
+	// 		GROUP BY guid
+	// 		HAVING COUNT(guid) > 1
+
+	// WORKS - but is very slow
+	// 		SELECT ID
+	// 		FROM $wpdb->posts
+	// 		WHERE guid IN (
+	// 			SELECT guid
+	// 			FROM $wpdb->posts
+	// 			WHERE post_type != 'revision'
+	// 			GROUP BY guid
+	// 			HAVING COUNT(guid) > 1
+	// 		)
+	// 		AND post_type != 'revision'
+
+		$non_unique_guids = $wpdb->get_col($wpdb->prepare("
+			SELECT p1.ID
+			FROM $wpdb->posts p1
+			WHERE 1 < (
+				SELECT COUNT(ID) 
+				FROM $wpdb->posts p2 
+				WHERE p1.post_type != 'revision'
+				AND p1.guid = p2.guid
+			)
+			AND p1.post_type != 'revision'
+		"));
+
+		// make them unique
+		if (count($non_unique_guids)) {
+			foreach ($non_unique_guids as $post_id) {
+				$url = site_url('?p='.$post_id);
+				$r = $wpdb->query($wpdb->prepare("
+					UPDATE $wpdb->posts
+					SET guid = %s
+					WHERE ID = %d
+				", $url, $post_id));
+
+				// Error Handling
+				if ($r === false) {
+					$this->add_error(2);
+				}
+			}
+		}
+
+		// remove index from GUID column
+		$r = $wpdb->query("
+			ALTER TABLE $wpdb->posts
+			DROP INDEX guid
+		");
+
+		// Error Handling
+		if ($r === false) {
+			$this->add_error(3);
+		}
+
+	}
+
+	function add_error($error_num) {
+		if (!in_array($error_num, $this->errors)) {
+			$this->errors[] = intval($error_num);
+		}
+	}
+
+}
+if (is_admin()) {
+	$cf_guid_fix = new CF_Guid_Fix;
+	$cf_guid_fix->add_actions();
+}