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61 lines
1.9 KiB
Erlang
61 lines
1.9 KiB
Erlang
-module(yaku).
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-include("../include/riichi.hrl").
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-compile([export_all]).
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yakuhai(#hand{sets=Sets}) ->
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length(lists:filter(fun(T = #tile{}) ->
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case T#tile.suit of
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wind ->
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% TODO: Round/Seat Winds
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false;
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dragon ->
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true;
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_ ->
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false
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end
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end,
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Sets)).
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tanyao(#hand{sets=Sets}) ->
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not lists:any(fun(T = #tile{}) ->
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case T#tile.suit of
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dragon ->
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true;
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wind ->
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true;
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_ ->
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lists:member(T#tile.value, [1,9])
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end
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end,
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Sets).
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pinfu(#hand{sets=Sets}) ->
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% TODO: Verify closed, open wait, pair not round/seat wind
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lists:all(fun(S) ->
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case S of
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#seq{} ->
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true;
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_ ->
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false
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end
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end,
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[S || S <- Sets]).
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% 7 Pairs
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chiitoitsu(#hand{tiles=[], sets=Sets})
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when length(Sets) =:= 7 ->
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Pairs = [S || S <- Sets, S#set.count =:= 2],
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length(Pairs) =:= 7 andalso sets:size(sets:from_list(Pairs)) =:= 7.
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% 13 Orphans
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kokushi_musou(#hand{tiles=Tiles, sets=Sets})
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when length(Tiles) =:= 13
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andalso length(Sets) =:= 0 ->
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not lists:any(fun(#tile{value=V}) ->
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lists:member(V, lists:seq(2,8))
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end,
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Tiles)
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andalso sets:size(sets:from_list(Tiles)) =:= 13.
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