comparison: util/rsm.lua
util/rsm.lua
- changeset 387
- 508bf163502b
- child 490
- 6b2f31da9610
equal
deleted
inserted
replaced
| 386:7b68c57ceac2 | 387:508bf163502b |
|---|---|
| 1 local stanza = require"util.stanza".stanza; | |
| 2 local tostring, tonumber = tostring, tonumber; | |
| 3 local type = type; | |
| 4 local pairs = pairs; | |
| 5 | |
| 6 local xmlns_rsm = 'http://jabber.org/protocol/rsm'; | |
| 7 | |
| 8 local element_parsers = {}; | |
| 9 | |
| 10 do | |
| 11 local parsers = element_parsers; | |
| 12 local function xs_int(st) | |
| 13 return tonumber((st:get_text())); | |
| 14 end | |
| 15 local function xs_string(st) | |
| 16 return st:get_text(); | |
| 17 end | |
| 18 | |
| 19 parsers.after = xs_string; | |
| 20 parsers.before = function(st) | |
| 21 local text = st:get_text(); | |
| 22 return text == "" or text; | |
| 23 end; | |
| 24 parsers.max = xs_int; | |
| 25 parsers.index = xs_int; | |
| 26 | |
| 27 parsers.first = function(st) | |
| 28 return { index = tonumber(st.attr.index); st:get_text() }; | |
| 29 end; | |
| 30 parsers.last = xs_string; | |
| 31 parsers.count = xs_int; | |
| 32 end | |
| 33 | |
| 34 local element_generators = setmetatable({ | |
| 35 first = function(st, data) | |
| 36 if type(data) == "table" then | |
| 37 st:tag("first", { index = data.index }):text(data[1]):up(); | |
| 38 else | |
| 39 st:tag("first"):text(tostring(data)):up(); | |
| 40 end | |
| 41 end; | |
| 42 before = function(st, data) | |
| 43 if data == true then | |
| 44 st:tag("before"):up(); | |
| 45 else | |
| 46 st:tag("before"):text(tostring(data)):up(); | |
| 47 end | |
| 48 end | |
| 49 }, { | |
| 50 __index = function(_, name) | |
| 51 return function(st, data) | |
| 52 st:tag(name):text(tostring(data)):up(); | |
| 53 end | |
| 54 end; | |
| 55 }); | |
| 56 | |
| 57 | |
| 58 local function parse(set) | |
| 59 local rs = {}; | |
| 60 for tag in set:childtags() do | |
| 61 local name = tag.name; | |
| 62 local parser = name and element_parsers[name]; | |
| 63 if parser then | |
| 64 rs[name] = parser(tag); | |
| 65 end | |
| 66 end | |
| 67 return rs; | |
| 68 end | |
| 69 | |
| 70 local function generate(t) | |
| 71 local st = stanza("set", { xmlns = xmlns_rsm }); | |
| 72 for k,v in pairs(t) do | |
| 73 if element_parsers[k] then | |
| 74 element_generators[k](st, v); | |
| 75 end | |
| 76 end | |
| 77 return st; | |
| 78 end | |
| 79 | |
| 80 local function get(st) | |
| 81 local set = st:get_child("set", xmlns_rsm); | |
| 82 if set and #set.tags > 0 then | |
| 83 return parse(set); | |
| 84 end | |
| 85 end | |
| 86 | |
| 87 return { parse = parse, generate = generate, get = get }; |
