Pong bot for erlang.

2011-04-16 19:40:07 +02:00 · 2011-04-16 19:40:07 +02:00 · 9986a801aa
commit 9986a801aa
parent 5620b67c34
2 changed files with 305 additions and 0 deletions
--- a/games/pong_bot_e/ggs_network.erl
+++ b/games/pong_bot_e/ggs_network.erl
@ -0,0 +1,123 @@
+-module(ggs_network).
+-export([connect/0,append_key_value_strings_to_dict/2,key_value_string_to_list/1]).
+
+connect() ->
+    {ok,Socket} = gen_tcp:connect("localhost", 9000,[{active, false}]),
+    A = gen_tcp:recv(Socket,0),
+    read(A),
+    Socket.
+    
+read(Message) ->
+    case Message of
+    {ok, M} ->
+        HeaderList = string:tokens(M, "\n"),
+        Headers = extract_headers(HeaderList),
+        Data    = extract_data(HeaderList),
+        received_command(Headers, Data)
+    end.
+
+received_command(Headers, Data) ->
+    {ok, CommandList} = dict:find("Client-Command", Headers),
+    Command = lists:nth(1, CommandList), 
+    case Command of
+        "hello" ->
+            io:format("Received command 'hello'~n"),
+            pong_bot:set_game_token(Data),
+            %gen_server:cast({global, pong_bot}, {game_token, Data}),
+            send_command("Ready", "");
+            %pong_bot:ggsNetworkReady(); Unneccessary
+        "defined" -> 
+            ok;
+            %pong_bot:ggsNetworkDefined(); Unneccessary
+        Command ->
+            gen_server:ggsNetworkReceivedCommandWithArgs(Command,  Data)
+    end.
+
+make_message(ServerOrGame, Command, Args) ->
+    io:format("Make message~n"),
+    GameToken = pong_bot:get_game_token(),
+%    GameToken = gen_server:call({global, pong_bot}, game_token),
+    io:format("Make message2~n"),
+    StrGameToken = string:concat("Token: ", GameToken),
+    StrGameTokenln = string:concat(StrGameToken, "\n"),
+    StrCommand = string:concat("-Command: ", Command),
+    StrCommandln = string:concat(StrCommand, "\n"),
+    StrFullCommand = string:concat(ServerOrGame, StrCommandln),
+    StrContentLength = string:concat("Content-Length: ", integer_to_list(length(Args))),
+    StrContentLengthln = string:concat(StrContentLength, "\n\n"),
+    StrTokenCommand = string:concat(StrGameTokenln, StrFullCommand),
+    Message = string:concat(StrTokenCommand, StrContentLengthln),
+
+    MessageWithArgs = string:concat(Message, list_concat(Args,[])),
+    MessageWithArgs.
+
+%define(SourceCode) ->
+%    write(make_message("Server", "define", SourceCode)).
+
+
+send_command(Command, Args) ->
+    write(make_message("Client", Command, Args)).
+    
+write(Message) ->
+    Socket = gen_server:call({global, pong_bot}, socket),
+    gen_tcp:send(Socket, Message).
+
+list_concat([],Ret) ->
+    Ret;
+list_concat([E|ES],Ret) ->
+    NewRet = string:concat(Ret,E),
+    list_concat(ES,NewRet).
+    
+
+
+%%%Packet parsing.%%%
+
+
+extract_headers(Source) -> 
+    key_value_strings_to_dict(Source).
+
+
+extract_data([]) ->
+    [];
+extract_data([E|ES]) ->
+    KeyValueList = key_value_string_to_list(E),
+    case length(KeyValueList) of
+        2 ->
+            extract_data(ES);
+        _ ->
+            E
+    end.
+
+
+%%%Low-level internals.%%%
+
+
+%%["K1: V1","K2: V2","KN: VN" ...] -> Dict
+key_value_strings_to_dict(Strings) ->
+    Dict = dict:new(),
+    append_key_value_strings_to_dict(Strings,Dict).
+
+%%["K1: V1","K2: V2","KN: VN" ...], Dict -> NewDict
+append_key_value_strings_to_dict([Str|Strings],Dict) ->
+    KeyValueList = key_value_string_to_list(Str),
+    case length(KeyValueList) of
+        2  -> 
+            NewDict = append_string_pair_to_dict(Dict,lists:nth(1,KeyValueList),lists:nth(2,KeyValueList)),
+            append_key_value_strings_to_dict(Strings,NewDict);
+        _ -> 
+            append_key_value_strings_to_dict(Strings,Dict)
+    end;
+append_key_value_strings_to_dict([],Dict) ->
+    Dict.
+
+
+%%"Hello: "World!" -> ["Hello","World!"]
+key_value_string_to_list(KeyValueString) ->
+    string:tokens(KeyValueString, ": ").
+
+
+%%Append a key str1 and a value str2 to the dict Dict
+append_string_pair_to_dict(Dict, Str1, Str2) ->
+    dict:append(Str1, Str2, Dict).
+
+