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
|
local stanza = require"util.stanza".stanza;
local tostring, tonumber = tostring, tonumber;
local type = type;
local pairs = pairs;
local xmlns_rsm = 'http://jabber.org/protocol/rsm';
local element_parsers = {};
do
local parsers = element_parsers;
local function xs_int(st)
return tonumber((st:get_text()));
end
local function xs_string(st)
return st:get_text();
end
parsers.after = xs_string;
parsers.before = function(st)
local text = st:get_text();
return text == "" or text;
end;
parsers.max = xs_int;
parsers.index = xs_int;
parsers.first = function(st)
return { index = tonumber(st.attr.index); st:get_text() };
end;
parsers.last = xs_string;
parsers.count = xs_int;
end
local element_generators = setmetatable({
first = function(st, data)
if type(data) == "table" then
st:tag("first", { index = data.index }):text(data[1]):up();
else
st:tag("first"):text(tostring(data)):up();
end
end;
before = function(st, data)
if data == true then
st:tag("before"):up();
else
st:tag("before"):text(tostring(data)):up();
end
end
}, {
__index = function(_, name)
return function(st, data)
st:tag(name):text(tostring(data)):up();
end
end;
});
local function parse(set)
local rs = {};
for tag in set:childtags() do
local name = tag.name;
local parser = name and element_parsers[name];
if parser then
rs[name] = parser(tag);
end
end
return rs;
end
local function generate(t)
local st = stanza("set", { xmlns = xmlns_rsm });
for k,v in pairs(t) do
if element_parsers[k] then
element_generators[k](st, v);
end
end
return st;
end
local function get(st)
local set = st:get_child("set", xmlns_rsm);
if set and #set.tags > 0 then
return parse(set);
end
end
return { parse = parse, generate = generate, get = get };
|
