facebook queueing on failure, sync update.php with boot.php update version to avoid race condition

addon/facebook/facebook.php

@@ -339,6 +339,7 @@ function facebook_install() {
 	register_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
 	register_hook('plugin_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
 	register_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
+	register_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
 }
 
 
@@ -347,6 +348,7 @@ function facebook_uninstall() {
 	unregister_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
 	unregister_hook('plugin_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
 	unregister_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
+	unregister_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
 }
 
 
@@ -635,9 +637,19 @@ function facebook_post_hook(&$a,&$b) {
 						);
 					}
 					else {
-						// FIXME queue the message so we can attempt to redeliver, see include/notifier.php and include/queue.php
+						if(! $likes) {
-						if(! $likes)
+							$s = serialize(array('url' => $url, 'item' => $b, 'post' => $postvars));
-							notice( t('Facebook delivery failed.') . EOL);
+							q("INSERT INTO `queue` ( `network`, `cid`, `created`, `last`, `content`)
+								VALUES ( '%s', '%s', '%s', '%s') ",
+								dbesc(NETWORK_FACEBOOK),
+								intval($a->contact),
+								dbesc(datetime_convert()),
+								dbesc(datetime_convert()),
+								dbesc($s)
+							);								
+
+							notice( t('Facebook post failed. Queued for retry.') . EOL);
+						}
 					}
 					
 					logger('Facebook post returns: ' . $x, LOGGER_DEBUG);
@@ -648,6 +660,56 @@ function facebook_post_hook(&$a,&$b) {
 }
 
 
+function fb_queue_hook(&$a,&$b) {
+
+	require_once('include/queue_fn.php');
+	if((! is_array($b)) || (! count($b)))
+		return;
+	foreach($b as $x) {
+		if($b['network'] !== NETWORK_FACEBOOK)
+			continue;
+		$r = q("SELECT `user`.* FROM `user` LEFT JOIN `contact` on `contact`.`uid` = `user`.`uid` 
+			WHERE `contact`.`self` = 1 AND `contact`.`id` = %d LIMIT 1",
+			intval($x['cid'])
+		);
+		if(! count($r))
+			continue;
+
+		$user = $r[0];
+
+		$appid  = get_config('facebook', 'appid'  );
+		$secret = get_config('facebook', 'appsecret' );
+
+		if($appid && $secret) {
+			$fb_post   = intval(get_pconfig($user['uid'],'facebook','post'));
+			$fb_token  = get_pconfig($user['uid'],'facebook','access_token');
+
+			if($fb_post && $fb_token) {
+				logger('facebook_queue: able to post');
+				require_once('library/facebook.php');
+
+				$z = unserialize($x['content']);
+				$item = $z['item'];
+				$j = post_url($z['url'],$z['post']);
+
+				$retj = json_decode($j);
+				if($retj->id) {
+					q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d LIMIT 1",
+						dbesc('fb::' . $retj->id),
+						intval($item['id'])
+					);
+					logger('facebook queue: success: ' . $j); 
+					remove_queue_item($x['id']);
+				}
+				else {
+					logger('facebook_queue: failed: ' . $j);
+					update_queue_time($x['id']);
+				}
+			}
+		}
+	}
+}
+
 function fb_consume_all($uid) {
 
 	require_once('include/items.php');

boot.php

@@ -6,7 +6,7 @@ ini_set('pcre.backtrack_limit', 250000);
 
 define ( 'FRIENDIKA_VERSION',      '2.2.999' );
 define ( 'DFRN_PROTOCOL_VERSION',  '2.21'    );
-define ( 'DB_UPDATE_VERSION',      1059      );
+define ( 'DB_UPDATE_VERSION',      1060      );
 
 define ( 'EOL',                    "<br />\r\n"     );
 define ( 'ATOM_TIME',              'Y-m-d\TH:i:s\Z' );
@@ -481,10 +481,18 @@ function check_config(&$a) {
 		$stored = intval($build);
 		$current = intval(DB_UPDATE_VERSION);
 		if(($stored < $current) && file_exists('update.php')) {
+
 			// We're reporting a different version than what is currently installed.
 			// Run any existing update scripts to bring the database up to current.
 
 			require_once('update.php');
+
+			// make sure that boot.php and update.php are the same release, we might be
+			// updating right this very second and the correct version of the update.php
+			// file may not be here yet. This can happen on a very busy site.
+
+			if(DB_UPDATE_VERSION == UPDATE_VERSION) {
+
 				for($x = $stored; $x < $current; $x ++) {
 					if(function_exists('update_' . $x)) {
 						$func = 'update_' . $x;
@@ -494,6 +502,7 @@ function check_config(&$a) {
 				set_config('system','build', DB_UPDATE_VERSION);
 			}
 		}
+	}
 
 	/**
 	 *

database.sql

@@ -440,6 +440,7 @@ PRIMARY KEY ( `id` )
 CREATE TABLE IF NOT EXISTS `queue` (
 `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
 `cid` INT NOT NULL ,
+`network` CHAR( 32 ) NOT NULL,
 `created` DATETIME NOT NULL ,
 `last` DATETIME NOT NULL ,
 `content` MEDIUMTEXT NOT NULL

include/queue.php

@@ -1,20 +1,6 @@
 <?php
 require_once("boot.php");
-
+require_once('include/queue_fn.php');
-function update_queue_time($id) {
-	logger('queue: requeue item ' . $id);
-	q("UPDATE `queue` SET `last` = '%s' WHERE `id` = %d LIMIT 1",
-		dbesc(datetime_convert()),
-		intval($id)
-	);
-}
-
-function remove_queue_item($id) {
-	logger('queue: remove queue item ' . $id);
-	q("DELETE FROM `queue` WHERE `id` = %d LIMIT 1",
-		intval($id)
-	);
-}
 
 function queue_run($argv, $argc){
   global $a, $db;
@@ -58,6 +44,10 @@ function queue_run($argv, $argc){
 	if(! count($r)){
 		return;
 	}
+
+	call_hooks('queue_predeliver', $a, $r);
+
+
 	// delivery loop
 
 	require_once('include/salmon.php');
@@ -69,6 +59,7 @@ function queue_run($argv, $argc){
 		if(! count($qi))
 			continue;
 
+
 		$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 			intval($qi[0]['cid'])
 		);
@@ -121,7 +112,6 @@ function queue_run($argv, $argc){
 				}
 				break;
 			default:
-				$a = get_app();
 				$params = array('owner' => $owner, 'contact' => $contact, 'queue' => $q_item, 'result' => false);
 				call_hooks('queue_deliver', $a, $params);
 		

include/queue_fn.php

@@ -0,0 +1,16 @@
+<?php
+
+function update_queue_time($id) {
+	logger('queue: requeue item ' . $id);
+	q("UPDATE `queue` SET `last` = '%s' WHERE `id` = %d LIMIT 1",
+		dbesc(datetime_convert()),
+		intval($id)
+	);
+}
+
+function remove_queue_item($id) {
+	logger('queue: remove queue item ' . $id);
+	q("DELETE FROM `queue` WHERE `id` = %d LIMIT 1",
+		intval($id)
+	);
+}

update.php

@@ -1,5 +1,7 @@
 <?php
 
+define( 'UPDATE_VERSION' , 1060 );
+
 /**
  *
  * update.php - automatic system update
@@ -28,7 +30,7 @@
  *    2. Update this file by adding a new function at the end with the number of the current DB_UPDATE_VERSION.
  *       This function should modify the current database schema and perform any other steps necessary
  *       to ensure that upgrade is silent and free from requiring interaction.
- *    3. Increment the DB_UPDATE_VERSION in boot.php
+ *    3. Increment the DB_UPDATE_VERSION in boot.php *AND* the UPDATE_VERSION in this file to match it
  *    4. TEST the upgrade prior to checkin and filing a pull request.
  *
  */
@@ -499,3 +501,8 @@ function update_1057() {
 function update_1058() {
 	q("ALTER TABLE `item` ADD `event-id` INT NOT NULL AFTER `resource-id` ");
 }
+
+function update_1059() {
+	q("ALTER TABLE `queue` ADD `network` CHAR( 32 ) NOT NULL AFTER `cid` ");
+}
+