| 1 | local stanza = require"prosody.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 }; |