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comparison mod_captcha_registration/util/dataforms.lua @ 1373:985bfc6e8cad

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mod_captcha_registration: initial commit
author mrDoctorWho <mrdoctorwho@gmail.com>
date Sat, 29 Mar 2014 22:56:24 +0700
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1372:a573d64968e9 1373:985bfc6e8cad
1 -- Prosody IM
2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
4 --
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
7 --
8
9 local setmetatable = setmetatable;
10 local pairs, ipairs = pairs, ipairs;
11 local tostring, type, next = tostring, type, next;
12 local t_concat = table.concat;
13 local st = require "util.stanza";
14 local jid_prep = require "util.jid".prep;
15
16 module "dataforms"
17
18 local xmlns_forms = 'jabber:x:data';
19
20 local form_t = {};
21 local form_mt = { __index = form_t };
22
23 function new(layout)
24 return setmetatable(layout, form_mt);
25 end
26
27 function form_t.form(layout, data, formtype)
28 local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
29 if layout.title then
30 form:tag("title"):text(layout.title):up();
31 end
32 if layout.instructions then
33 form:tag("instructions"):text(layout.instructions):up();
34 end
35 for n, field in ipairs(layout) do
36 local field_type = field.type or "text-single";
37 -- Add field tag
38 form:tag("field", { type = field_type, var = field.name, label = field.label });
39
40 local value = (data and data[field.name]) or field.value;
41
42 if value then
43 -- Add value, depending on type
44 if field_type == "hidden" then
45 if type(value) == "table" then
46 -- Assume an XML snippet
47 form:tag("value")
48 :add_child(value)
49 :up();
50 else
51 form:tag("value"):text(tostring(value)):up();
52 end
53 elseif field_type == "boolean" then
54 form:tag("value"):text((value and "1") or "0"):up();
55 elseif field_type == "fixed" then
56 form:tag("value"):text(value):up();
57 elseif field_type == "jid-multi" then
58 for _, jid in ipairs(value) do
59 form:tag("value"):text(jid):up();
60 end
61 elseif field_type == "jid-single" then
62 form:tag("value"):text(value):up();
63 elseif field_type == "text-single" or field_type == "text-private" then
64 form:tag("value"):text(value):up();
65 elseif field_type == "text-multi" then
66 -- Split into multiple <value> tags, one for each line
67 for line in value:gmatch("([^\r\n]+)\r?\n*") do
68 form:tag("value"):text(line):up();
69 end
70 elseif field_type == "list-single" then
71 local has_default = false;
72 for _, val in ipairs(value) do
73 if type(val) == "table" then
74 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
75 if val.default and (not has_default) then
76 form:tag("value"):text(val.value):up();
77 has_default = true;
78 end
79 else
80 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
81 end
82 end
83 elseif field_type == "list-multi" then
84 for _, val in ipairs(value) do
85 if type(val) == "table" then
86 form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
87 if val.default then
88 form:tag("value"):text(val.value):up();
89 end
90 else
91 form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
92 end
93 end
94 elseif field_type == "media" then
95 form:tag("media", { xmlns = "urn:xmpp:media-element" });
96 for _, val in ipairs(value) do
97 form:tag("uri", { type = val.type }):text(val.uri):up()
98 end
99 form:up();
100 end
101 end
102
103 if field.required then
104 form:tag("required"):up();
105 end
106
107 -- Jump back up to list of fields
108 form:up();
109 end
110 return form;
111 end
112
113 local field_readers = {};
114
115 function form_t.data(layout, stanza)
116 local data = {};
117 local errors = {};
118
119 for _, field in ipairs(layout) do
120 local tag;
121 for field_tag in stanza:childtags() do
122 if field.name == field_tag.attr.var then
123 tag = field_tag;
124 break;
125 end
126 end
127
128 if not tag then
129 if field.required then
130 errors[field.name] = "Required value missing";
131 end
132 else
133 local reader = field_readers[field.type];
134 if reader then
135 data[field.name], errors[field.name] = reader(tag, field.required);
136 end
137 end
138 end
139 if next(errors) then
140 return data, errors;
141 end
142 return data;
143 end
144
145 field_readers["text-single"] =
146 function (field_tag, required)
147 local data = field_tag:get_child_text("value");
148 if data and #data > 0 then
149 return data
150 elseif required then
151 return nil, "Required value missing";
152 end
153 end
154
155 field_readers["text-private"] =
156 field_readers["text-single"];
157
158 field_readers["jid-single"] =
159 function (field_tag, required)
160 local raw_data = field_tag:get_child_text("value")
161 local data = jid_prep(raw_data);
162 if data and #data > 0 then
163 return data
164 elseif raw_data then
165 return nil, "Invalid JID: " .. raw_data;
166 elseif required then
167 return nil, "Required value missing";
168 end
169 end
170
171 field_readers["jid-multi"] =
172 function (field_tag, required)
173 local result = {};
174 local err = {};
175 for value_tag in field_tag:childtags("value") do
176 local raw_value = value_tag:get_text();
177 local value = jid_prep(raw_value);
178 result[#result+1] = value;
179 if raw_value and not value then
180 err[#err+1] = ("Invalid JID: " .. raw_value);
181 end
182 end
183 if #result > 0 then
184 return result, (#err > 0 and t_concat(err, "\n") or nil);
185 elseif required then
186 return nil, "Required value missing";
187 end
188 end
189
190 field_readers["list-multi"] =
191 function (field_tag, required)
192 local result = {};
193 for value in field_tag:childtags("value") do
194 result[#result+1] = value:get_text();
195 end
196 if #result > 0 then
197 return result;
198 elseif required then
199 return nil, "Required value missing";
200 end
201 end
202
203 field_readers["text-multi"] =
204 function (field_tag, required)
205 local data, err = field_readers["list-multi"](field_tag, required);
206 if data then
207 data = t_concat(data, "\n");
208 end
209 return data, err;
210 end
211
212 field_readers["list-single"] =
213 field_readers["text-single"];
214
215 local boolean_values = {
216 ["1"] = true, ["true"] = true,
217 ["0"] = false, ["false"] = false,
218 };
219
220 field_readers["boolean"] =
221 function (field_tag, required)
222 local raw_value = field_tag:get_child_text("value");
223 local value = boolean_values[raw_value ~= nil and raw_value];
224 if value ~= nil then
225 return value;
226 elseif raw_value then
227 return nil, "Invalid boolean representation";
228 elseif required then
229 return nil, "Required value missing";
230 end
231 end
232
233 field_readers["hidden"] =
234 function (field_tag)
235 return field_tag:get_child_text("value");
236 end
237
238 field_readers["media"] = field_readers["text-single"]
239
240 return _M;
241
242
243 --[=[
244
245 Layout:
246 {
247
248 title = "MUC Configuration",
249 instructions = [[Use this form to configure options for this MUC room.]],
250
251 { name = "FORM_TYPE", type = "hidden", required = true };
252 { name = "field-name", type = "field-type", required = false };
253 }
254
255
256 --]=]