--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stanza.lua Sat Jul 17 02:52:26 2010 +0100
@@ -0,0 +1,374 @@
+-- Prosody IM
+-- 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.
+--
+
+
+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_find = string.find;
+local os = os;
+
+local do_pretty_printing = not os.getenv("WINDIR");
+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 xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas";
+
+module "stanza"
+
+stanza_mt = { __type = "stanza" };
+stanza_mt.__index = stanza_mt;
+
+function stanza(name, attr)
+ local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
+ return setmetatable(stanza, stanza_mt);
+end
+
+function stanza_mt:query(xmlns)
+ return self:tag("query", { xmlns = xmlns });
+end
+
+function stanza_mt:body(text, attr)
+ return self:tag("body", attr):text(text);
+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);
+ return self;
+end
+
+function stanza_mt:text(text)
+ (self.last_add[#self.last_add] or self):add_direct_child(text);
+ return self;
+end
+
+function stanza_mt:up()
+ t_remove(self.last_add);
+ return self;
+end
+
+function stanza_mt:reset()
+ local last_add = self.last_add;
+ for i = 1,#last_add do
+ last_add[i] = nil;
+ end
+ return self;
+end
+
+function stanza_mt:add_direct_child(child)
+ if type(child) == "table" then
+ t_insert(self.tags, child);
+ end
+ t_insert(self, child);
+end
+
+function stanza_mt:add_child(child)
+ (self.last_add[#self.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:child_with_name(name)
+ 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
+ if child.attr.xmlns == ns then return child; end
+ end
+end
+
+function stanza_mt:children()
+ local i = 0;
+ return function (a)
+ i = i + 1
+ local v = a[i]
+ if v then return v; end
+ 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;
+end
+
+local xml_escape
+do
+ local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
+ 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", 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).."'");
+ elseif not(k == "xmlns" and v == parentns) then
+ t_insert(buf, " "..k.."='"..xml_escape(v).."'");
+ end
+ end
+ local len = #t;
+ if len == 0 then
+ t_insert(buf, "/>");
+ else
+ t_insert(buf, ">");
+ for n=1,len do
+ local child = t[n];
+ if child.name then
+ self(child, buf, self, xml_escape, t.attr.xmlns);
+ else
+ t_insert(buf, xml_escape(child));
+ end
+ end
+ t_insert(buf, "</"..name..">");
+ end
+end
+function stanza_mt.__tostring(t)
+ local buf = {};
+ _dostring(t, buf, _dostring, xml_escape, nil);
+ return t_concat(buf);
+end
+
+function stanza_mt.top_tag(t)
+ local attr_string = "";
+ if t.attr then
+ for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, xml_escape(tostring(v))); end end
+ end
+ return s_format("<%s%s>", t.name, attr_string);
+end
+
+function stanza_mt.get_text(t)
+ if #t.tags == 0 then
+ return t_concat(t);
+ end
+end
+
+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 error_tag:children() 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 or "";
+end
+
+function stanza_mt.__add(s1, s2)
+ return s1:add_direct_child(s2);
+end
+
+
+do
+ local id = 0;
+ function new_id()
+ id = id + 1;
+ return "lx"..id;
+ end
+end
+
+function preserialize(stanza)
+ local s = { name = stanza.name, attr = stanza.attr };
+ for _, child in ipairs(stanza) do
+ if type(child) == "table" then
+ t_insert(s, preserialize(child));
+ else
+ t_insert(s, child);
+ end
+ end
+ return s;
+end
+
+function deserialize(stanza)
+ -- Set metatable
+ 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
+ deserialize(child);
+ end
+ end
+ if not stanza.tags then
+ -- Rebuild tags
+ local tags = {};
+ for _, child in ipairs(stanza) do
+ if type(child) == "table" then
+ t_insert(tags, child);
+ 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);
+ end
+ return setmetatable(new_table, getmetatable(object));
+ end
+
+ return _copy(stanza)
+end
+
+function message(attr, body)
+ if not body then
+ return stanza("message", attr);
+ else
+ return stanza("message", attr):tag("body"):text(body);
+ end
+end
+function iq(attr)
+ if attr and not attr.id then attr.id = new_id(); end
+ return stanza("iq", attr or { id = new_id() });
+end
+
+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
+
+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)
+ return stanza("presence", attr);
+end
+
+if do_pretty_printing then
+ local style_attrk = getstyle("yellow");
+ local style_attrv = getstyle("red");
+ local style_tagname = getstyle("red");
+ local style_punc = getstyle("magenta");
+
+ local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
+ local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
+ --local tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">").."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
+ local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
+ function stanza_mt.pretty_print(t)
+ local children_text = "";
+ for n, child in ipairs(t) do
+ if type(child) == "string" then
+ children_text = children_text .. xml_escape(child);
+ else
+ children_text = children_text .. child:pretty_print();
+ end
+ end
+
+ local attr_string = "";
+ if t.attr then
+ for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
+ end
+ return s_format(tag_format, t.name, attr_string, children_text, t.name);
+ end
+
+ function stanza_mt.pretty_top_tag(t)
+ local attr_string = "";
+ if t.attr then
+ for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
+ end
+ return s_format(top_tag_format, t.name, attr_string);
+ end
+else
+ -- Sorry, fresh out of colours for you guys ;)
+ stanza_mt.pretty_print = stanza_mt.__tostring;
+ stanza_mt.pretty_top_tag = stanza_mt.top_tag;
+end
+
+return _M;