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util/stanza.lua @ 262:8c73fb2ff4a2
A treat for Linux users ;)
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 14 Nov 2008 16:03:33 +0000 |
parent | 251:5b6dec537914 |
child | 338:804f5e62a41f |
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; |
262 | 13 local os = os; |
145 | 14 |
262 | 15 local do_pretty_printing = not os.getenv("WINDIR"); |
16 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; | |
17 | |
145 | 18 local log = require "util.logger".init("stanza"); |
19 | |
0 | 20 module "stanza" |
21 | |
22 stanza_mt = {}; | |
23 stanza_mt.__index = stanza_mt; | |
24 | |
25 function stanza(name, attr) | |
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26 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 27 return setmetatable(stanza, stanza_mt); |
28 end | |
29 | |
30 function stanza_mt:query(xmlns) | |
31 return self:tag("query", { xmlns = xmlns }); | |
32 end | |
33 function stanza_mt:tag(name, attrs) | |
34 local s = stanza(name, attrs); | |
180
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35 (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 36 t_insert(self.last_add, s); |
37 return self; | |
38 end | |
39 | |
40 function stanza_mt:text(text) | |
180
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41 (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 42 return self; |
43 end | |
44 | |
45 function stanza_mt:up() | |
46 t_remove(self.last_add); | |
47 return self; | |
48 end | |
49 | |
180
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50 function stanza_mt:add_direct_child(child) |
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51 if type(child) == "table" then |
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52 t_insert(self.tags, child); |
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53 end |
0 | 54 t_insert(self, child); |
55 end | |
56 | |
180
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57 function stanza_mt:add_child(child) |
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58 (self.last_add[#self.last_add] or self):add_direct_child(child); |
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59 return self; |
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60 end |
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61 |
0 | 62 function stanza_mt:child_with_name(name) |
63 for _, child in ipairs(self) do | |
64 if child.name == name then return child; end | |
65 end | |
66 end | |
67 | |
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68 function stanza_mt:children() |
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69 local i = 0; |
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70 return function (a) |
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71 i = i + 1 |
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72 local v = a[i] |
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73 if v then return v; end |
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74 end, self, i; |
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75 |
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76 end |
2 | 77 function stanza_mt:childtags() |
78 local i = 0; | |
79 return function (a) | |
80 i = i + 1 | |
81 local v = self.tags[i] | |
82 if v then return v; end | |
83 end, self.tags[1], i; | |
84 | |
85 end | |
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86 |
4 | 87 do |
88 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; | |
89 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end | |
90 end | |
91 | |
92 local xml_escape = xml_escape; | |
93 | |
0 | 94 function stanza_mt.__tostring(t) |
95 local children_text = ""; | |
96 for n, child in ipairs(t) do | |
4 | 97 if type(child) == "string" then |
98 children_text = children_text .. xml_escape(child); | |
99 else | |
100 children_text = children_text .. tostring(child); | |
101 end | |
0 | 102 end |
103 | |
104 local attr_string = ""; | |
105 if t.attr then | |
23 | 106 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 | 107 end |
23 | 108 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name); |
0 | 109 end |
110 | |
242
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111 function stanza_mt.top_tag(t) |
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112 local attr_string = ""; |
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113 if t.attr then |
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114 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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115 end |
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116 return s_format("<%s%s>", t.name, attr_string); |
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117 end |
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118 |
0 | 119 function stanza_mt.__add(s1, s2) |
180
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120 return s1:add_direct_child(s2); |
0 | 121 end |
122 | |
123 | |
124 do | |
125 local id = 0; | |
126 function new_id() | |
127 id = id + 1; | |
128 return "lx"..id; | |
129 end | |
130 end | |
131 | |
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132 function preserialize(stanza) |
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133 local s = { name = stanza.name, attr = stanza.attr }; |
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134 for _, child in ipairs(stanza) do |
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135 if type(child) == "table" then |
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136 t_insert(s, preserialize(child)); |
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137 else |
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138 t_insert(s, child); |
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139 end |
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140 end |
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141 return s; |
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142 end |
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143 |
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144 function deserialize(stanza) |
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145 -- Set metatable |
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146 if stanza then |
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147 setmetatable(stanza, stanza_mt); |
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148 for _, child in ipairs(stanza) do |
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149 if type(child) == "table" then |
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150 deserialize(child); |
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151 end |
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152 end |
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153 if not stanza.tags then |
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154 -- Rebuild tags |
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155 local tags = {}; |
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156 for _, child in ipairs(stanza) do |
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157 if type(child) == "table" then |
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158 t_insert(tags, child); |
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159 end |
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160 end |
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161 stanza.tags = tags; |
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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) | |
209
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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 | |
262 | 198 if do_pretty_printing then |
199 local style_attrk = getstyle("yellow"); | |
200 local style_attrv = getstyle("red"); | |
201 local style_tagname = getstyle("red"); | |
202 local style_punc = getstyle("magenta"); | |
203 | |
204 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
205 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
206 --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, ">"); | |
207 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
208 function stanza_mt.pretty_print(t) | |
209 local children_text = ""; | |
210 for n, child in ipairs(t) do | |
211 if type(child) == "string" then | |
212 children_text = children_text .. xml_escape(child); | |
213 else | |
214 children_text = children_text .. child:pretty_print(); | |
215 end | |
216 end | |
217 | |
218 local attr_string = ""; | |
219 if t.attr then | |
220 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 | |
221 end | |
222 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
223 end | |
224 | |
225 function stanza_mt.pretty_top_tag(t) | |
226 local attr_string = ""; | |
227 if t.attr then | |
228 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 | |
229 end | |
230 return s_format(top_tag_format, t.name, attr_string); | |
231 end | |
232 else | |
233 -- Sorry, fresh out of colours for you guys ;) | |
234 stanza_mt.pretty_print = stanza_mt.__tostring; | |
235 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
236 end | |
237 | |
90
da468ed49a7b
Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
Matthew Wild <mwild1@gmail.com>
parents:
70
diff
changeset
|
238 return _M; |