basic chatterbot support - though these would still require additional functionality in the API to maintain presence as they'll get kicked out of the room if they don't ping it regularly.

include/chat.php

@@ -182,3 +182,44 @@ function chatroom_list($uid) {
 
 	return $r;
 }
+
+/**
+ * create a chat message via API.
+ * It is the caller's responsibility to enter the room.
+ */
+
+function chat_message($uid,$room_id,$xchan,$text) {
+
+	$ret = array('success' => false);
+
+	if(! $text)
+		return;
+
+	$sql_extra = permissions_sql($uid);
+
+	$r = q("select * from chatroom where cr_uid = %d and cr_id = %d $sql_extra",
+		intval($uid),
+		intval($room_id)
+	);
+	if(! $r)
+		return $ret;
+
+	$arr = array(
+		'chat_room' => $room_id,
+		'chat_xchan' => $xchan,
+		'chat_text' => $text
+	);
+
+	call_hooks('chat_message',$arr);
+
+	$x = q("insert into chat ( chat_room, chat_xchan, created, chat_text )
+		values( %d, '%s', '%s', '%s' )",
+		intval($room_id),
+		dbesc($xchan),
+		dbesc(datetime_convert()),
+		dbesc($arr['chat_text'])		
+	);
+
+	$ret['success'] = true;
+	return $ret;
+}

mod/chatsvc.php

@@ -41,13 +41,22 @@ function chatsvc_post(&$a) {
 	if(! $r)
 		json_return_and_die($ret);
 
+	$arr = array(
+		'chat_room' => $a->data['chat']['room_id'],
+		'chat_xchan' => get_observer_hash(),
+		'chat_text' => $text
+	);
+
+	call_hooks('chat_post',$arr);
+
 	$x = q("insert into chat ( chat_room, chat_xchan, created, chat_text )
 		values( %d, '%s', '%s', '%s' )",
 		intval($a->data['chat']['room_id']),
 		dbesc(get_observer_hash()),
 		dbesc(datetime_convert()),
-		dbesc($text)		
+		dbesc($arr['chat_text'])		
 	);
+
 	$ret['success'] = true;
 	json_return_and_die($ret);
 }