-- Prosody IM v0.4 -- Copyright (C) 2008-2009 Matthew Wild -- Copyright (C) 2008-2009 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 os = os; local do_pretty_printing = not os.getenv("WINDIR"); local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; local log = require "util.logger".init("stanza"); module "stanza" stanza_mt = {}; 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: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 do local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end end local xml_escape = xml_escape; local function dostring(t, buf, self, xml_escape) local nsid, ns, attrk = 0; t_insert(buf, "<"); t_insert(buf, t.name); for k, v in pairs(t.attr) do if type(k) == "string" then t_insert(buf, " "); ns, attrk = s_match(k, "^([^|]+)|(.+)$"); if ns then nsid = (nsid or -1) + 1; t_insert(buf, "xmlns:ns"..nsid); t_insert(buf, "='"); t_insert(buf, (xml_escape(tostring(ns)))); t_insert(buf, "' "); t_insert(buf, "ns"..nsid..":"..attrk); else t_insert(buf, k); end t_insert(buf, "='"); t_insert(buf, (xml_escape(tostring(v)))); t_insert(buf, "'"); end end t_insert(buf, ">"); for n, child in ipairs(t) do if child.name then self(child, buf, self, xml_escape); else t_insert(buf, (xml_escape(child))); end end t_insert(buf, "</"); t_insert(buf, t.name); t_insert(buf, ">"); end function stanza_mt.__tostring(t) local buf = {}; dostring(t, buf, dostring, xml_escape); 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.__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 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 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 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;