1 files changed, 186 insertions, 74 deletions

diff --git a/util/stanza.lua b/util/stanza.lua
index e02136f2..7c214210 100644
--- a/util/stanza.lua
+++ b/util/stanza.lua
@@ -1,6 +1,6 @@
 -- Prosody IM
--- Copyright (C) 2008-2009 Matthew Wild
--- Copyright (C) 2008-2009 Waqas Hussain
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
 -- 
 -- This project is MIT/X11 licensed. Please see the
 -- COPYING file in the source package for more information.
@@ -8,39 +8,44 @@
 
 
 local t_insert      =  table.insert;
-local t_concat      =  table.concat;
 local t_remove      =  table.remove;
 local t_concat      =  table.concat;
 local s_format      = string.format;
 local s_match       =  string.match;
 local tostring      =      tostring;
 local setmetatable  =  setmetatable;
-local getmetatable  =  getmetatable;
 local pairs         =         pairs;
 local ipairs        =        ipairs;
 local type          =          type;
-local next          =          next;
-local print         =         print;
-local unpack        =        unpack;
 local s_gsub        =   string.gsub;
-local s_char        =   string.char;
+local s_sub         =    string.sub;
 local s_find        =   string.find;
 local os            =            os;
 
 local do_pretty_printing = not os.getenv("WINDIR");
-local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
+local getstyle, getstring;
+if do_pretty_printing then
+	local ok, termcolours = pcall(require, "util.termcolours");
+	if ok then
+		getstyle, getstring = termcolours.getstyle, termcolours.getstring;
+	else
+		do_pretty_printing = nil;
+	end
+end
 
-local log = require "util.logger".init("stanza");
+local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas";
 
 module "stanza"
 
-stanza_mt = {};
+stanza_mt = { __type = "stanza" };
 stanza_mt.__index = stanza_mt;
+local stanza_mt = stanza_mt;
 
 function stanza(name, attr)
-	local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
+	local stanza = { name = name, attr = attr or {}, tags = {} };
 	return setmetatable(stanza, stanza_mt);
 end
+local stanza = stanza;
 
 function stanza_mt:query(xmlns)
 	return self:tag("query", { xmlns = xmlns });
@@ -52,26 +57,27 @@ end
 
 function stanza_mt:tag(name, attrs)
 	local s = stanza(name, attrs);
-	(self.last_add[#self.last_add] or self):add_direct_child(s);
-	t_insert(self.last_add, s);
+	local last_add = self.last_add;
+	if not last_add then last_add = {}; self.last_add = last_add; end
+	(last_add[#last_add] or self):add_direct_child(s);
+	t_insert(last_add, s);
 	return self;
 end
 
 function stanza_mt:text(text)
-	(self.last_add[#self.last_add] or self):add_direct_child(text);
-	return self; 
+	local last_add = self.last_add;
+	(last_add and last_add[#last_add] or self):add_direct_child(text);
+	return self;
 end
 
 function stanza_mt:up()
-	t_remove(self.last_add);
+	local last_add = self.last_add;
+	if last_add then t_remove(last_add); end
 	return self;
 end
 
 function stanza_mt:reset()
-	local last_add = self.last_add;
-	for i = 1,#last_add do
-		last_add[i] = nil;
-	end
+	self.last_add = nil;
 	return self;
 end
 
@@ -83,18 +89,38 @@ function stanza_mt:add_direct_child(child)
 end
 
 function stanza_mt:add_child(child)
-	(self.last_add[#self.last_add] or self):add_direct_child(child);
+	local last_add = self.last_add;
+	(last_add and last_add[#last_add] or self):add_direct_child(child);
 	return self;
 end
 
+function stanza_mt:get_child(name, xmlns)
+	for _, child in ipairs(self.tags) do
+		if (not name or child.name == name)
+			and ((not xmlns and self.attr.xmlns == child.attr.xmlns)
+				or child.attr.xmlns == xmlns) then
+			
+			return child;
+		end
+	end
+end
+
+function stanza_mt:get_child_text(name, xmlns)
+	local tag = self:get_child(name, xmlns);
+	if tag then
+		return tag:get_text();
+	end
+	return nil;
+end
+
 function stanza_mt:child_with_name(name)
-	for _, child in ipairs(self.tags) do	
+	for _, child in ipairs(self.tags) do
 		if child.name == name then return child; end
 	end
 end
 
 function stanza_mt:child_with_ns(ns)
-	for _, child in ipairs(self.tags) do	
+	for _, child in ipairs(self.tags) do
 		if child.attr.xmlns == ns then return child; end
 	end
 end
@@ -103,35 +129,94 @@ function stanza_mt:children()
 	local i = 0;
 	return function (a)
 			i = i + 1
-			local v = a[i]
-			if v then return v; end
+			return a[i];
 		end, self, i;
-	                                    
 end
-function stanza_mt:childtags()
-	local i = 0;
-	return function (a)
-			i = i + 1
-			local v = self.tags[i]
-			if v then return v; end
-		end, self.tags[1], i;
-	                                    
+
+function stanza_mt:childtags(name, xmlns)
+	local tags = self.tags;
+	local start_i, max_i = 1, #tags;
+	return function ()
+		for i = start_i, max_i do
+			local v = tags[i];
+			if (not name or v.name == name)
+			and ((not xmlns and self.attr.xmlns == v.attr.xmlns)
+				or v.attr.xmlns == xmlns) then
+				start_i = i+1;
+				return v;
+			end
+		end
+	end;
 end
 
-local xml_escape = (function()
+function stanza_mt:maptags(callback)
+	local tags, curr_tag = self.tags, 1;
+	local n_children, n_tags = #self, #tags;
+	
+	local i = 1;
+	while curr_tag <= n_tags and n_tags > 0 do
+		if self[i] == tags[curr_tag] then
+			local ret = callback(self[i]);
+			if ret == nil then
+				t_remove(self, i);
+				t_remove(tags, curr_tag);
+				n_children = n_children - 1;
+				n_tags = n_tags - 1;
+				i = i - 1;
+				curr_tag = curr_tag - 1;
+			else
+				self[i] = ret;
+				tags[curr_tag] = ret;
+			end
+			curr_tag = curr_tag + 1;
+		end
+		i = i + 1;
+	end
+	return self;
+end
+
+function stanza_mt:find(path)
+	local pos = 1;
+	local len = #path + 1;
+
+	repeat
+		local xmlns, name, text;
+		local char = s_sub(path, pos, pos);
+		if char == "@" then
+			return self.attr[s_sub(path, pos + 1)];
+		elseif char == "{" then
+			xmlns, pos = s_match(path, "^([^}]+)}()", pos + 1);
+		end
+		name, text, pos = s_match(path, "^([^@/#]*)([/#]?)()", pos);
+		name = name ~= "" and name or nil;
+		if pos == len then
+			if text == "#" then
+				return self:get_child_text(name, xmlns);
+			end
+			return self:get_child(name, xmlns);
+		end
+		self = self:get_child(name, xmlns);
+	until not self
+end
+
+
+local xml_escape
+do
 	local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
-	return function(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
-end)();
-local function _dostring(t, buf, self, xml_escape)
+	function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
+	_M.xml_escape = xml_escape;
+end
+
+local function _dostring(t, buf, self, xml_escape, parentns)
 	local nsid = 0;
 	local name = t.name
 	t_insert(buf, "<"..name);
 	for k, v in pairs(t.attr) do
-		if s_find(k, "|", 1, true) then
-			local ns, attrk = s_match(k, "^([^|]+)|(.+)$");
+		if s_find(k, "\1", 1, true) then
+			local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$");
 			nsid = nsid + 1;
 			t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
-		else
+		elseif not(k == "xmlns" and v == parentns) then
 			t_insert(buf, " "..k.."='"..xml_escape(v).."'");
 		end
 	end
@@ -143,7 +228,7 @@ local function _dostring(t, buf, self, xml_escape)
 		for n=1,len do
 			local child = t[n];
 			if child.name then
-				self(child, buf, self, xml_escape);
+				self(child, buf, self, xml_escape, t.attr.xmlns);
 			else
 				t_insert(buf, xml_escape(child));
 			end
@@ -153,7 +238,7 @@ local function _dostring(t, buf, self, xml_escape)
 end
 function stanza_mt.__tostring(t)
 	local buf = {};
-	_dostring(t, buf, _dostring, xml_escape);
+	_dostring(t, buf, _dostring, xml_escape, nil);
 	return t_concat(buf);
 end
 
@@ -171,11 +256,30 @@ function stanza_mt.get_text(t)
 	end
 end
 
-function stanza_mt.__add(s1, s2)
-	return s1:add_direct_child(s2);
+function stanza_mt.get_error(stanza)
+	local type, condition, text;
+	
+	local error_tag = stanza:get_child("error");
+	if not error_tag then
+		return nil, nil, nil;
+	end
+	type = error_tag.attr.type;
+	
+	for _, child in ipairs(error_tag.tags) do
+		if child.attr.xmlns == xmlns_stanzas then
+			if not text and child.name == "text" then
+				text = child:get_text();
+			elseif not condition then
+				condition = child.name;
+			end
+			if condition and text then
+				break;
+			end
+		end
+	end
+	return type, condition or "undefined-condition", text;
 end
 
-
 do
 	local id = 0;
 	function new_id()
@@ -201,6 +305,17 @@ function deserialize(stanza)
 	if stanza then
 		local attr = stanza.attr;
 		for i=1,#attr do attr[i] = nil; end
+		local attrx = {};
+		for att in pairs(attr) do
+			if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then
+				local ns,na = s_match(att, "^([^|]+)|(.+)$");
+				attrx[ns.."\1"..na] = attr[att];
+				attr[att] = nil;
+			end
+		end
+		for a,v in pairs(attrx) do
+			attr[a] = v;
+		end
 		setmetatable(stanza, stanza_mt);
 		for _, child in ipairs(stanza) do
 			if type(child) == "table" then
@@ -216,39 +331,33 @@ function deserialize(stanza)
 				end
 			end
 			stanza.tags = tags;
-			if not stanza.last_add then
-				stanza.last_add = {};
-			end
 		end
 	end
 	
 	return stanza;
 end
 
-function clone(stanza)
-	local lookup_table = {};
-	local function _copy(object)
-		if type(object) ~= "table" then
-			return object;
-		elseif lookup_table[object] then
-			return lookup_table[object];
-		end
-		local new_table = {};
-		lookup_table[object] = new_table;
-		for index, value in pairs(object) do
-			new_table[_copy(index)] = _copy(value);
+local function _clone(stanza)
+	local attr, tags = {}, {};
+	for k,v in pairs(stanza.attr) do attr[k] = v; end
+	local new = { name = stanza.name, attr = attr, tags = tags };
+	for i=1,#stanza do
+		local child = stanza[i];
+		if child.name then
+			child = _clone(child);
+			t_insert(tags, child);
 		end
-		return setmetatable(new_table, getmetatable(object));
+		t_insert(new, child);
 	end
-	
-	return _copy(stanza)
+	return setmetatable(new, stanza_mt);
 end
+clone = _clone;
 
 function message(attr, body)
 	if not body then
 		return stanza("message", attr);
 	else
-		return stanza("message", attr):tag("body"):text(body);
+		return stanza("message", attr):tag("body"):text(body):up();
 	end
 end
 function iq(attr)
@@ -260,13 +369,16 @@ function reply(orig)
 	return stanza(orig.name, orig.attr and { to = orig.attr.from, from = orig.attr.to, id = orig.attr.id, type = ((orig.name == "iq" and "result") or orig.attr.type) });
 end
 
-function error_reply(orig, type, condition, message)
-	local t = reply(orig);
-	t.attr.type = "error";
-	t:tag("error", {type = type})
-		:tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
-	if (message) then t:tag("text"):text(message):up(); end
-	return t; -- stanza ready for adding app-specific errors
+do
+	local xmpp_stanzas_attr = { xmlns = xmlns_stanzas };
+	function error_reply(orig, type, condition, message)
+		local t = reply(orig);
+		t.attr.type = "error";
+		t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here
+			:tag(condition, xmpp_stanzas_attr):up();
+		if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end
+		return t; -- stanza ready for adding app-specific errors
+	end
 end
 
 function presence(attr)
@@ -286,7 +398,7 @@ if do_pretty_printing then
 	function stanza_mt.pretty_print(t)
 		local children_text = "";
 		for n, child in ipairs(t) do
-			if type(child) == "string" then	
+			if type(child) == "string" then
 				children_text = children_text .. xml_escape(child);
 			else
 				children_text = children_text .. child:pretty_print();