Merge pull request #364 from fermionic/diaspora-refactor-and-better-disabling

Diaspora refactor and better disabling

include/delivery.php

@@ -113,7 +113,7 @@ function delivery_run($argv, $argc){
 			$uid = $r[0]['uid'];
 			$updated = $r[0]['edited'];
 
-			// The following seems superfluous. We've already checked for "if (! intval($r[0]['parent']))" a few lines up
+			// POSSIBLE CLEANUP --> The following seems superfluous. We've already checked for "if (! intval($r[0]['parent']))" a few lines up
 			if(! $parent_id)
 				continue;
 

include/items.php

@@ -2268,6 +2268,7 @@ function local_delivery($importer,$data) {
 
 			$is_a_remote_comment = false;
 
+			// POSSIBLE CLEANUP --> Why select so many fields when only forum_mode and wall are used?
 			$r = q("select `item`.`id`, `item`.`uri`, `item`.`tag`, `item`.`forum_mode`,`item`.`origin`,`item`.`wall`, 
 				`contact`.`name`, `contact`.`url`, `contact`.`thumb` from `item` 
 				LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id` 
@@ -3359,40 +3360,8 @@ function drop_item($id,$interactive = true) {
 				);
 			}
 
-			// Add a relayable_retraction signature for Diaspora. Note that we can't add a target_author_signature
+			// Add a relayable_retraction signature for Diaspora.
-			// if the comment was deleted by a remote user. That should be ok, because if a remote user is deleting
+			store_diaspora_retract_sig($item, $a->user, $a->get_baseurl());
-			// the comment, that means we're the home of the post, and Diaspora will only
-			// check the parent_author_signature of retractions that it doesn't have to relay further
-			//
-			// I don't think this function gets called for an "unlike," but I'll check anyway
-			$signed_text = $item['guid'] . ';' . ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
-
-			if(local_user() == $item['uid']) {
-
-				$handle = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-				$authorsig = base64_encode(rsa_sign($signed_text,$a->user['prvkey'],'sha256'));
-			}
-			else {
-				$r = q("SELECT `nick`, `url` FROM `contact` WHERE `id` = '%d' LIMIT 1",
-					$item['contact-id']
-				);
-				if(count($r)) {
-					// The below handle only works for NETWORK_DFRN. I think that's ok, because this function
-					// only handles DFRN deletes
-					$handle_baseurl_start = strpos($r['url'],'://') + 3;
-					$handle_baseurl_length = strpos($r['url'],'/profile') - $handle_baseurl_start;
-					$handle = $r['nick'] . '@' . substr($r['url'], $handle_baseurl_start, $handle_baseurl_length);
-					$authorsig = '';
-				}
-			}
-
-			if(isset($handle))
-				q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-					intval($item['id']),
-					dbesc($signed_text),
-					dbesc($authorsig),
-					dbesc($handle)
-				);
 		}
 		$drop_id = intval($item['id']);
 
@@ -3480,3 +3449,52 @@ function posted_date_widget($url,$uid,$wall) {
 	));
 	return $o;
 }
+
+
+function store_diaspora_retract_sig($item, $user, $baseurl) {
+	// Note that we can't add a target_author_signature
+	// if the comment was deleted by a remote user. That should be ok, because if a remote user is deleting
+	// the comment, that means we're the home of the post, and Diaspora will only
+	// check the parent_author_signature of retractions that it doesn't have to relay further
+	//
+	// I don't think this function gets called for an "unlike," but I'll check anyway
+
+	$enabled = intval(get_config('system','diaspora_enabled'));
+	if(! $enabled) {
+		logger('drop_item: diaspora support disabled, not storing retraction signature', LOGGER_DEBUG);
+		return;
+	}
+
+	logger('drop_item: storing diaspora retraction signature');
+
+	$signed_text = $item['guid'] . ';' . ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
+
+	if(local_user() == $item['uid']) {
+
+		$handle = $user['nickname'] . '@' . substr($baseurl, strpos($baseurl,'://') + 3);
+		$authorsig = base64_encode(rsa_sign($signed_text,$user['prvkey'],'sha256'));
+	}
+	else {
+		$r = q("SELECT `nick`, `url` FROM `contact` WHERE `id` = '%d' LIMIT 1",
+			$item['contact-id']
+		);
+		if(count($r)) {
+			// The below handle only works for NETWORK_DFRN. I think that's ok, because this function
+			// only handles DFRN deletes
+			$handle_baseurl_start = strpos($r['url'],'://') + 3;
+			$handle_baseurl_length = strpos($r['url'],'/profile') - $handle_baseurl_start;
+			$handle = $r['nick'] . '@' . substr($r['url'], $handle_baseurl_start, $handle_baseurl_length);
+			$authorsig = '';
+		}
+	}
+
+	if(isset($handle))
+		q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+			intval($item['id']),
+			dbesc($signed_text),
+			dbesc($authorsig),
+			dbesc($handle)
+		);
+
+	return;
+}

include/notifier.php

@@ -125,7 +125,7 @@ function notifier_run($argv, $argc){
 		$uid = $r[0]['uid'];
 		$updated = $r[0]['edited'];
 
-		// The following seems superfluous. We've already checked for "if (! intval($r[0]['parent']))" a few lines up
+		// POSSIBLE CLEANUP --> The following seems superfluous. We've already checked for "if (! intval($r[0]['parent']))" a few lines up
 		if(! $parent_id)
 			return;
 

mod/item.php

@@ -728,26 +728,10 @@ function item_post(&$a) {
 			
 			}
 
-			// We won't be able to sign Diaspora comments for authenticated visitors - we don't have their private key
 
-			if($self) {
+			// Store the comment signature information in case we need to relay to Diaspora
-				require_once('include/bb2diaspora.php');
+			store_diaspora_comment_sig($datarray, $author, ($self ? $a->user['prvkey'] : false), $parent_item, $post_id);
-				$signed_body = html_entity_decode(bb2diaspora($datarray['body']));
-				$myaddr = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-				if($datarray['verb'] === ACTIVITY_LIKE) 
-					$signed_text = $datarray['guid'] . ';' . 'Post' . ';' . $parent_item['guid'] . ';' . 'true' . ';' . $myaddr;
-				else
-					$signed_text = $datarray['guid'] . ';' . $parent_item['guid'] . ';' . $signed_body . ';' . $myaddr;
 
-				$authorsig = base64_encode(rsa_sign($signed_text,$a->user['prvkey'],'sha256'));
-
-				q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-					intval($post_id),
-					dbesc($signed_text),
-					dbesc(base64_encode($authorsig)),
-					dbesc($myaddr)
-				);
-			}
 		}
 		else {
 			$parent = $post_id;
@@ -1038,3 +1022,47 @@ function handle_tag($a, &$body, &$inform, &$str_tags, $profile_uid, $tag) {
 
 	return array('replaced' => $replaced, 'contact' => $r[0]);	
 }
+
+
+function store_diaspora_comment_sig($datarray, $author, $uprvkey, $parent_item, $post_id) {
+	// We won't be able to sign Diaspora comments for authenticated visitors - we don't have their private key
+
+	$enabled = intval(get_config('system','diaspora_enabled'));
+	if(! $enabled) {
+		logger('mod_item: diaspora support disabled, not storing comment signature', LOGGER_DEBUG);
+		return;
+	}
+
+
+	logger('mod_item: storing diaspora comment signature');
+
+	require_once('include/bb2diaspora.php');
+	$signed_body = html_entity_decode(bb2diaspora($datarray['body']));
+
+//	$myaddr = $user['nickname'] . '@' . substr($baseurl, strpos($baseurl,'://') + 3);
+//	if( $author['network'] === NETWORK_DIASPORA)
+//		$diaspora_handle = $author['addr'];
+//	else {
+	// Only works for NETWORK_DFRN
+	$contact_baseurl_start = strpos($author['url'],'://') + 3;
+	$contact_baseurl_length = strpos($author['url'],'/profile') - $contact_baseurl_start;
+	$contact_baseurl = substr($author['url'], $contact_baseurl_start, $contact_baseurl_length);
+	$diaspora_handle = $author['nick'] . '@' . $contact_baseurl;
+//	}
+
+	$signed_text = $datarray['guid'] . ';' . $parent_item['guid'] . ';' . $signed_body . ';' . $diaspora_handle;
+
+	if( $uprvkey !== false )
+		$authorsig = base64_encode(rsa_sign($signed_text,$uprvkey,'sha256'));
+	else
+		$authorsig = '';
+
+	q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+		intval($post_id),
+		dbesc($signed_text),
+		dbesc(base64_encode($authorsig)),
+		dbesc($diaspora_handle)
+	);
+
+	return;
+}

mod/like.php

@@ -121,57 +121,16 @@ function like_content(&$a) {
 			intval($like_item['id'])
 		);
 
-		// Clean up the `sign` table
+
+		// Clean up the Diaspora signatures for this like
+		// Go ahead and do it even if Diaspora support is disabled. We still want to clean up
+		// if it had been enabled in the past
 		$r = q("DELETE FROM `sign` WHERE `iid` = %d",
 			intval($like_item['id'])
 		);
 
 		// Save the author information for the unlike in case we need to relay to Diaspora
-		// Note that we can only create a signature for a user of the local server. We don't have
+		store_diaspora_like_retract_sig($activity, $item, $like_item, $contact);
-		// a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it 
-		// means we are the relay, and for relayable_retractions, Diaspora
-		// only checks the parent_author_signature if it doesn't have to relay further
-		//
-		// If $item['resource-id'] exists, it means the item is a photo. Diaspora doesn't support
-		// likes on photos, so don't bother.
-
-		if(($activity === ACTIVITY_LIKE) && (! $item['resource-id'])) {
-			$signed_text = $like_item['guid'] . ';' . 'Like';
-
-			if( $contact['network'] === NETWORK_DIASPORA)
-				$diaspora_handle = $contact['addr'];
-			else { // Only works for NETWORK_DFRN
-				$contact_baseurl_start = strpos($contact['url'],'://') + 3;
-				$contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
-				$contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
-				$diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
-
-				// Get contact's private key if he's a user of the local Friendica server
-				$r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
-					dbesc($contact['url'])
-				);
-
-				if( $r) {
-					$contact_uid = $r['uid'];
-					$r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
-						intval($contact_uid)
-					);
-
-					if( $r)
-						$authorsig = base64_encode(rsa_sign($signed_text,$r['prvkey'],'sha256'));
-				}
-			}
-
-			if(! isset($authorsig))
-				$authorsig = '';
-
-			q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-				intval($like_item['id']),
-				dbesc($signed_text),
-				dbesc($authorsig),
-				dbesc($diaspora_handle)
-			);
-		}
 
 
 //		proc_run('php',"include/notifier.php","like","$post_id"); // $post_id isn't defined here!
@@ -252,15 +211,98 @@ EOT;
 
 
 	// Save the author information for the like in case we need to relay to Diaspora
+	store_diaspora_like_sig($activity, $post_type, $contact, $post_id);
+
+
+	$arr['id'] = $post_id;
+
+	call_hooks('post_local_end', $arr);
+
+	proc_run('php',"include/notifier.php","like","$post_id");
+
+	killme();
+//	return; // NOTREACHED
+}
+
+
+function store_diaspora_like_retract_sig($activity, $item, $like_item, $contact) {
+	// Note that we can only create a signature for a user of the local server. We don't have
+	// a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it 
+	// means we are the relay, and for relayable_retractions, Diaspora
+	// only checks the parent_author_signature if it doesn't have to relay further
+	//
+	// If $item['resource-id'] exists, it means the item is a photo. Diaspora doesn't support
+	// likes on photos, so don't bother.
+
+	$enabled = intval(get_config('system','diaspora_enabled'));
+	if(! $enabled) {
+		logger('mod_like: diaspora support disabled, not storing like retraction signature', LOGGER_DEBUG);
+		return;
+	}
+
+	logger('mod_like: storing diaspora like retraction signature');
+
+	if(($activity === ACTIVITY_LIKE) && (! $item['resource-id'])) {
+		$signed_text = $like_item['guid'] . ';' . 'Like';
+
+//		if( $contact['network'] === NETWORK_DIASPORA)
+//			$diaspora_handle = $contact['addr'];
+//		else {
+		// Only works for NETWORK_DFRN
+		$contact_baseurl_start = strpos($contact['url'],'://') + 3;
+		$contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
+		$contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
+		$diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
+
+		// Get contact's private key if he's a user of the local Friendica server
+		$r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
+			dbesc($contact['url'])
+		);
+
+		if( $r) {
+			$contact_uid = $r['uid'];
+			$r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
+				intval($contact_uid)
+			);
+
+			if( $r)
+				$authorsig = base64_encode(rsa_sign($signed_text,$r['prvkey'],'sha256'));
+		}
+//		}
+
+		if(! isset($authorsig))
+			$authorsig = '';
+
+		q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+			intval($like_item['id']),
+			dbesc($signed_text),
+			dbesc($authorsig),
+			dbesc($diaspora_handle)
+		);
+	}
+
+	return;
+}
+
+function store_diaspora_like_sig($activity, $post_type, $contact, $post_id) {
 	// Note that we can only create a signature for a user of the local server. We don't have
 	// a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it 
 	// means we are the relay, and for relayable_retractions, Diaspora
 	// only checks the parent_author_signature if it doesn't have to relay further
 
+	$enabled = intval(get_config('system','diaspora_enabled'));
+	if(! $enabled) {
+		logger('mod_like: diaspora support disabled, not storing like signature', LOGGER_DEBUG);
+		return;
+	}
+
+	logger('mod_like: storing diaspora like signature');
+
 	if(($activity === ACTIVITY_LIKE) && ($post_type === t('status'))) {
-		if( $contact['network'] === NETWORK_DIASPORA)
+//		if( $contact['network'] === NETWORK_DIASPORA)
-			$diaspora_handle = $contact['addr'];
+//			$diaspora_handle = $contact['addr'];
-		else { // Only works for NETWORK_DFRN
+//		else {
+		// Only works for NETWORK_DFRN
 		$contact_baseurl_start = strpos($contact['url'],'://') + 3;
 		$contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
 		$contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
@@ -280,7 +322,7 @@ EOT;
 			if( $r)
 				$contact_uprvkey = $r['prvkey'];
 		}
-		}
+//		}
 
 		$r = q("SELECT guid, parent FROM `item` WHERE id = %d LIMIT 1",
 			intval($post_id)
@@ -308,13 +350,5 @@ EOT;
 		}
 	}
 
-
+	return;
-	$arr['id'] = $post_id;
-
-	call_hooks('post_local_end', $arr);
-
-	proc_run('php',"include/notifier.php","like","$post_id");
-
-	killme();
-//	return; // NOTREACHED
 }