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util/stanza.lua @ 251:5b6dec537914
Merge from waqas
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 13 Nov 2008 16:58:29 +0000 |
parent | 242:f15afbcbc55c |
parent | 246:0904fd197cbe |
child | 262:8c73fb2ff4a2 |
rev | line source |
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1 local t_insert = table.insert; |
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2 local t_remove = table.remove; |
23 | 3 local s_format = string.format; |
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4 local tostring = tostring; |
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5 local setmetatable = setmetatable; |
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6 local pairs = pairs; |
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7 local ipairs = ipairs; |
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8 local type = type; |
145 | 9 local next = next; |
10 local print = print; | |
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11 local unpack = unpack; |
4 | 12 local s_gsub = string.gsub; |
145 | 13 |
14 local debug = debug; | |
15 local log = require "util.logger".init("stanza"); | |
16 | |
0 | 17 module "stanza" |
18 | |
19 stanza_mt = {}; | |
20 stanza_mt.__index = stanza_mt; | |
21 | |
22 function stanza(name, attr) | |
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23 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 24 return setmetatable(stanza, stanza_mt); |
25 end | |
26 | |
27 function stanza_mt:query(xmlns) | |
28 return self:tag("query", { xmlns = xmlns }); | |
29 end | |
30 function stanza_mt:tag(name, attrs) | |
31 local s = stanza(name, attrs); | |
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32 (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 33 t_insert(self.last_add, s); |
34 return self; | |
35 end | |
36 | |
37 function stanza_mt:text(text) | |
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38 (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 39 return self; |
40 end | |
41 | |
42 function stanza_mt:up() | |
43 t_remove(self.last_add); | |
44 return self; | |
45 end | |
46 | |
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47 function stanza_mt:add_direct_child(child) |
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48 if type(child) == "table" then |
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49 t_insert(self.tags, child); |
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50 end |
0 | 51 t_insert(self, child); |
52 end | |
53 | |
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54 function stanza_mt:add_child(child) |
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55 (self.last_add[#self.last_add] or self):add_direct_child(child); |
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56 return self; |
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57 end |
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58 |
0 | 59 function stanza_mt:child_with_name(name) |
60 for _, child in ipairs(self) do | |
61 if child.name == name then return child; end | |
62 end | |
63 end | |
64 | |
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65 function stanza_mt:children() |
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66 local i = 0; |
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67 return function (a) |
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68 i = i + 1 |
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69 local v = a[i] |
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70 if v then return v; end |
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71 end, self, i; |
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72 |
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73 end |
2 | 74 function stanza_mt:childtags() |
75 local i = 0; | |
76 return function (a) | |
77 i = i + 1 | |
78 local v = self.tags[i] | |
79 if v then return v; end | |
80 end, self.tags[1], i; | |
81 | |
82 end | |
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83 |
4 | 84 do |
85 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; | |
86 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end | |
87 end | |
88 | |
89 local xml_escape = xml_escape; | |
90 | |
0 | 91 function stanza_mt.__tostring(t) |
92 local children_text = ""; | |
93 for n, child in ipairs(t) do | |
4 | 94 if type(child) == "string" then |
95 children_text = children_text .. xml_escape(child); | |
96 else | |
97 children_text = children_text .. tostring(child); | |
98 end | |
0 | 99 end |
100 | |
101 local attr_string = ""; | |
102 if t.attr then | |
23 | 103 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, tostring(v)); end end |
0 | 104 end |
23 | 105 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name); |
0 | 106 end |
107 | |
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108 function stanza_mt.top_tag(t) |
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109 local attr_string = ""; |
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110 if t.attr then |
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111 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, tostring(v)); end end |
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112 end |
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113 return s_format("<%s%s>", t.name, attr_string); |
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114 end |
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115 |
0 | 116 function stanza_mt.__add(s1, s2) |
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117 return s1:add_direct_child(s2); |
0 | 118 end |
119 | |
120 | |
121 do | |
122 local id = 0; | |
123 function new_id() | |
124 id = id + 1; | |
125 return "lx"..id; | |
126 end | |
127 end | |
128 | |
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129 function preserialize(stanza) |
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130 local s = { name = stanza.name, attr = stanza.attr }; |
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131 for _, child in ipairs(stanza) do |
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132 if type(child) == "table" then |
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133 t_insert(s, preserialize(child)); |
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134 else |
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135 t_insert(s, child); |
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136 end |
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137 end |
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138 return s; |
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139 end |
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140 |
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141 function deserialize(stanza) |
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142 -- Set metatable |
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143 if stanza then |
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144 setmetatable(stanza, stanza_mt); |
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145 for _, child in ipairs(stanza) do |
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146 if type(child) == "table" then |
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147 deserialize(child); |
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148 end |
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149 end |
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150 if not stanza.tags then |
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151 -- Rebuild tags |
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152 local tags = {}; |
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153 for _, child in ipairs(stanza) do |
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154 if type(child) == "table" then |
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155 t_insert(tags, child); |
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156 end |
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157 end |
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158 stanza.tags = tags; |
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159 end |
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160 if not stanza.last_add then |
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161 stanza.last_add = {}; |
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162 end |
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163 end |
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164 |
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165 return stanza; |
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166 end |
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167 |
0 | 168 function message(attr, body) |
169 if not body then | |
170 return stanza("message", attr); | |
171 else | |
172 return stanza("message", attr):tag("body"):text(body); | |
173 end | |
174 end | |
175 function iq(attr) | |
176 if attr and not attr.id then attr.id = new_id(); end | |
177 return stanza("iq", attr or { id = new_id() }); | |
178 end | |
179 | |
180 function reply(orig) | |
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181 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) }); |
0 | 182 end |
183 | |
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184 function error_reply(orig, type, condition, message, clone) |
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185 local t = reply(orig); |
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186 t.attr.type = "error"; |
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187 -- TODO use clone |
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188 t:tag("error", {type = type}) |
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189 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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190 if (message) then t:tag("text"):text(message):up(); end |
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191 return t; -- stanza ready for adding app-specific errors |
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192 end |
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193 |
0 | 194 function presence(attr) |
195 return stanza("presence", attr); | |
196 end | |
197 | |
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198 return _M; |