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
|
%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2016, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 12 Jul 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(xmpp_util).
%% API
-export([add_delay_info/3, add_delay_info/4, unwrap_carbon/1,
is_standalone_chat_state/1, get_xdata_values/2,
has_xdata_var/2, make_adhoc_response/1, make_adhoc_response/2,
decode_timestamp/1, encode_timestamp/1]).
-include("xmpp.hrl").
%%%===================================================================
%%% API
%%%===================================================================
-spec add_delay_info(stanza(), jid(), erlang:timestamp()) -> stanza().
add_delay_info(Stz, From, Time) ->
add_delay_info(Stz, From, Time, <<"">>).
-spec add_delay_info(stanza(), jid(),
erlang:timestamp(), binary()) -> stanza().
add_delay_info(Stz, From, Time, Desc) ->
case xmpp:get_subtag(Stz, #delay{}) of
#delay{from = OldFrom, desc = OldDesc} = Delay ->
case jid:tolower(From) == jid:tolower(OldFrom) of
true when Desc == <<"">> ->
Stz;
true when OldDesc == <<"">> ->
xmpp:set_subtag(Stz, Delay#delay{desc = Desc});
true ->
case binary:match(OldDesc, Desc) of
nomatch ->
NewDesc = <<OldDesc/binary, ", ", Desc/binary>>,
xmpp:set_subtag(Stz, Delay#delay{desc = NewDesc});
_ ->
Stz
end;
false ->
NewDelay = #delay{stamp = Time, from = From, desc = Desc},
xmpp:set_subtag(Stz, NewDelay)
end;
false ->
Delay = #delay{stamp = Time, from = From, desc = Desc},
xmpp:set_subtag(Stz, Delay)
end.
-spec unwrap_carbon(stanza()) -> xmpp_element().
unwrap_carbon(#message{} = Msg) ->
case xmpp:get_subtag(Msg, #carbons_sent{}) of
#carbons_sent{forwarded = #forwarded{sub_els = [El]}} ->
El;
_ ->
case xmpp:get_subtag(Msg, #carbons_received{}) of
#carbons_received{forwarded = #forwarded{sub_els = [El]}} ->
El;
_ ->
Msg
end
end;
unwrap_carbon(Stanza) -> Stanza.
-spec is_standalone_chat_state(stanza()) -> boolean().
is_standalone_chat_state(Stanza) ->
case unwrap_carbon(Stanza) of
#message{body = [], subject = [], sub_els = Els} ->
IgnoreNS = [?NS_CHATSTATES, ?NS_DELAY, ?NS_EVENT],
Stripped = [El || El <- Els,
not lists:member(xmpp:get_ns(El), IgnoreNS)],
Stripped == [];
_ ->
false
end.
-spec get_xdata_values(binary(), xdata()) -> [binary()].
get_xdata_values(Var, #xdata{fields = Fields}) ->
case lists:keyfind(Var, #xdata_field.var, Fields) of
#xdata_field{values = Vals} -> Vals;
false -> []
end.
-spec has_xdata_var(binary(), xdata()) -> boolean().
has_xdata_var(Var, #xdata{fields = Fields}) ->
lists:keymember(Var, #xdata_field.var, Fields).
-spec make_adhoc_response(adhoc_command(), adhoc_command()) -> adhoc_command().
make_adhoc_response(#adhoc_command{lang = Lang, node = Node, sid = SID},
Command) ->
Command#adhoc_command{lang = Lang, node = Node, sid = SID}.
-spec make_adhoc_response(adhoc_command()) -> adhoc_command().
make_adhoc_response(#adhoc_command{sid = <<"">>} = Command) ->
SID = encode_timestamp(p1_time_compat:timestamp()),
Command#adhoc_command{sid = SID};
make_adhoc_response(Command) ->
Command.
-spec decode_timestamp(binary()) -> erlang:timestamp().
decode_timestamp(S) ->
try try_decode_timestamp(S)
catch _:_ -> erlang:error({bad_timestamp, S})
end.
-spec encode_timestamp(erlang:timestamp()) -> binary().
encode_timestamp({MegaSecs, Secs, MicroSecs}) ->
{{Year, Month, Day}, {Hour, Minute, Second}} =
calendar:now_to_universal_time({MegaSecs, Secs, MicroSecs}),
Fraction = if MicroSecs > 0 ->
io_lib:format(".~6..0B", [MicroSecs]);
true ->
""
end,
list_to_binary(io_lib:format("~4..0B-~2..0B-~2..0BT"
"~2..0B:~2..0B:~2..0B~sZ",
[Year, Month, Day, Hour, Minute, Second,
Fraction])).
%%%===================================================================
%%% Internal functions
%%%===================================================================
try_decode_timestamp(<<Y:4/binary, $-, Mo:2/binary, $-, D:2/binary, $T,
H:2/binary, $:, Mi:2/binary, $:, S:2/binary, T/binary>>) ->
Date = {to_integer(Y, 1970, 9999), to_integer(Mo, 1, 12), to_integer(D, 1, 31)},
Time = {to_integer(H, 0, 23), to_integer(Mi, 0, 59), to_integer(S, 0, 59)},
{MS, {TZH, TZM}} = try_decode_fraction(T),
Seconds = calendar:datetime_to_gregorian_seconds({Date, Time}) -
calendar:datetime_to_gregorian_seconds({{1970,1,1}, {0,0,0}}) -
TZH * 60 * 60 - TZM * 60,
{Seconds div 1000000, Seconds rem 1000000, MS};
try_decode_timestamp(<<Y:4/binary, Mo:2/binary, D:2/binary, $T,
H:2/binary, $:, Mi:2/binary, $:, S:2/binary>>) ->
try_decode_timestamp(<<Y:4/binary, $-, Mo:2/binary, $-, D:2/binary, $T,
H:2/binary, $:, Mi:2/binary, $:, S:2/binary, $Z>>).
try_decode_fraction(<<$., T/binary>>) ->
{match, [V]} = re:run(T, <<"^[0-9]+">>, [{capture, [0], binary}]),
Size = size(V),
<<V:Size/binary, TZD/binary>> = T,
{to_integer(binary:part(V, 0, min(6, Size)), 0, 999999),
try_decode_tzd(TZD)};
try_decode_fraction(TZD) ->
{0, try_decode_tzd(TZD)}.
try_decode_tzd(<<$Z>>) ->
{0, 0};
try_decode_tzd(<<$-, H:2/binary, $:, M:2/binary>>) ->
{-1 * to_integer(H, 0, 12), to_integer(M, 0, 59)};
try_decode_tzd(<<$+, H:2/binary, $:, M:2/binary>>) ->
{to_integer(H, 0, 12), to_integer(M, 0, 59)}.
to_integer(S, Min, Max) ->
case binary_to_integer(S) of
I when I >= Min, I =< Max ->
I
end.
|
