aboutsummaryrefslogtreecommitdiffstats
path: root/util/dataforms.lua
blob: 85bb39c146f959d4b6ff81fca46a27c597c97dd3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
-- 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 setmetatable = setmetatable;
local pairs, ipairs = pairs, ipairs;
local tostring, type, next = tostring, type, next;
local t_concat = table.concat;
local st = require "util.stanza";
local jid_prep = require "util.jid".prep;

module "dataforms"

local xmlns_forms = 'jabber:x:data';

local form_t = {};
local form_mt = { __index = form_t };

function new(layout)
	return setmetatable(layout, form_mt);
end

function form_t.form(layout, data, formtype)
	local form = st.stanza("x", { xmlns = xmlns_forms, type = formtype or "form" });
	if layout.title then
		form:tag("title"):text(layout.title):up();
	end
	if layout.instructions then
		form:tag("instructions"):text(layout.instructions):up();
	end
	for n, field in ipairs(layout) do
		local field_type = field.type or "text-single";
		-- Add field tag
		form:tag("field", { type = field_type, var = field.name, label = field.label });

		local value = (data and data[field.name]) or field.value;
		
		if value then
			-- Add value, depending on type
			if field_type == "hidden" then
				if type(value) == "table" then
					-- Assume an XML snippet
					form:tag("value")
						:add_child(value)
						:up();
				else
					form:tag("value"):text(tostring(value)):up();
				end
			elseif field_type == "boolean" then
				form:tag("value"):text((value and "1") or "0"):up();
			elseif field_type == "fixed" then
				
			elseif field_type == "jid-multi" then
				for _, jid in ipairs(value) do
					form:tag("value"):text(jid):up();
				end
			elseif field_type == "jid-single" then
				form:tag("value"):text(value):up();
			elseif field_type == "text-single" or field_type == "text-private" then
				form:tag("value"):text(value):up();
			elseif field_type == "text-multi" then
				-- Split into multiple <value> tags, one for each line
				for line in value:gmatch("([^\r\n]+)\r?\n*") do
					form:tag("value"):text(line):up();
				end
			elseif field_type == "list-single" then
				local has_default = false;
				for _, val in ipairs(value) do
					if type(val) == "table" then
						form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
						if val.default and (not has_default) then
							form:tag("value"):text(val.value):up();
							has_default = true;
						end
					else
						form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
					end
				end
			elseif field_type == "list-multi" then
				for _, val in ipairs(value) do
					if type(val) == "table" then
						form:tag("option", { label = val.label }):tag("value"):text(val.value):up():up();
						if val.default then
							form:tag("value"):text(val.value):up();
						end
					else
						form:tag("option", { label= val }):tag("value"):text(tostring(val)):up():up();
					end
				end
			end
		end
		
		if field.required then
			form:tag("required"):up();
		end
		
		-- Jump back up to list of fields
		form:up();
	end
	return form;
end

local field_readers = {};

function form_t.data(layout, stanza)
	local data = {};
	local errors = {};

	for _, field in ipairs(layout) do
		local tag;
		for field_tag in stanza:childtags() do
			if field.name == field_tag.attr.var then
				tag = field_tag;
				break;
			end
		end

		if not tag then
			if field.required then
				errors[field.name] = "Required value missing";
			end
		else
			local reader = field_readers[field.type];
			if reader then
				data[field.name], errors[field.name] = reader(tag, field.required);
			end
		end
	end
	if next(errors) then
		return data, errors;
	end
	return data;
end

field_readers["text-single"] =
	function (field_tag, required)
		local data = field_tag:get_child_text("value");
		if data and #data > 0 then
			return data
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["text-private"] =
	field_readers["text-single"];

field_readers["jid-single"] =
	function (field_tag, required)
		local raw_data = field_tag:get_child_text("value")
		local data = jid_prep(raw_data);
		if data and #data > 0 then
			return data
		elseif raw_data then
			return raw_data, "Invalid JID";
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["jid-multi"] =
	function (field_tag, required)
		local result = {};
		local err = {};
		for value_tag in field_tag:childtags("value") do
			local raw_value = value_tag:get_text();
			local value = jid_prep(raw_value);
			result[#result+1] = value;
			if raw_value and not value then
				err[#err+1] = ("Invalid JID: " .. raw_value);
			end
		end
		if #result > 0 then
			return result, (#err > 0 and t_concat(err, "\n") or nil);
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["list-multi"] =
	function (field_tag, required)
		local result = {};
		for value in field_tag:childtags("value") do
			result[#result+1] = value;
		end
		return result, (required and #result == 0 and "Required value missing" or nil);
	end

field_readers["text-multi"] =
	function (field_tag, required)
		local data, err = field_readers["list-multi"](field_tag, required);
		if data then
			data = t_concat(data, "\n");
		end
		return data, err;
	end

field_readers["list-single"] =
	field_readers["text-single"];

	local boolean_values = {
		["1"] = true, ["true"] = true,
		["0"] = false, ["false"] = false,
	};

field_readers["boolean"] =
	function (field_tag, required)
		local raw_value = field_tag:get_child_text("value");
		local value = boolean_values[raw_value ~= nil and raw_value];
		if value ~= nil then
			return value;
		elseif raw_value then
			return "Invalid boolean representation";
		elseif required then
			return nil, "Required value missing";
		end
	end

field_readers["hidden"] =
	function (field_tag)
		return field_tag:get_child_text("value");
	end

return _M;


--[=[

Layout:
{

	title = "MUC Configuration",
	instructions = [[Use this form to configure options for this MUC room.]],

	{ name = "FORM_TYPE", type = "hidden", required = true };
	{ name = "field-name", type = "field-type", required = false };
}


--]=]