modules/erl/euphorik_protocole.erl

   1 % coding: utf-8
   2 % Copyright 2008 Grégory Burri
   3 %
   4 % This file is part of Euphorik.
   5 %
   6 % Euphorik is free software: you can redistribute it and/or modify
   7 % it under the terms of the GNU General Public License as published by
   8 % the Free Software Foundation, either version 3 of the License, or
   9 % (at your option) any later version.
  10 %
  11 % Euphorik is distributed in the hope that it will be useful,
  12 % but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 % GNU General Public License for more details.
  15 %
  16 % You should have received a copy of the GNU General Public License
  17 % along with Euphorik.  If not, see <http://www.gnu.org/licenses/>.
  18 %
  19 % Ce module gére les différents messages envoyés par le client (javascript) via AJAX.
  20 % Les messages donnés ainsi que les réponses sont au format JSON.
  21 % @author G.Burri
  22
  23
  24 -module(euphorik_protocole).
  25 -export([
  26    register/2,
  27    login/2,
  28    logout/1,
  29    profile/1,
  30    wait_event/1,
  31    put_message/1,
  32    ban/1,
  33    slap/1,
  34    put_troll/1,
  35    mod_troll/1,
  36    del_troll/1,
  37    unban_ip/1,
  38    list_banned_ips/1,
  39    erreur/1
  40 ]).
  41 -include("../include/euphorik_bd.hrl").
  42 -include("../include/euphorik_defines.hrl").
  43
  44
  45 % Une utilisateur s'enregistre avec un tuple {Login, Password}.
  46 register([{login, Login}, {password, Password}], IP) ->
  47    Can_register = euphorik_bd:can_register(IP),
  48    if Can_register ->
  49          case euphorik_bd:user_by_login(Login) of
  50             {ok, _} ->
  51                erreur("Login déjà existant");
  52             _ ->
  53                User = euphorik_bd:nouveau_user(Login, Password, generer_cookie()),
  54                euphorik_bd:update_ip(User#user.id, IP),
  55                json_reponse_login_ok(User)
  56          end;
  57       true ->
  58          erreur_register_flood()
  59    end;
  60 % Enregistrement sans {Login, Password}
  61 register([], IP) ->
  62    Can_register = euphorik_bd:can_register(IP),
  63    if Can_register ->
  64          User = euphorik_bd:nouveau_user("<nick>", generer_cookie()),
  65          euphorik_bd:update_ip(User#user.id, IP),
  66          json_reponse_login_ok(User);
  67       true ->
  68          erreur_register_flood()
  69    end.
  70
  71 erreur_register_flood() ->
  72    erreur("Trop de register (flood)").
  73
  74
  75 % Un utilisateur se logge (avec un couple {login, mot de passe})
  76 login([{login, Login}, {password, Password}], IP) ->
  77    loginUser(euphorik_bd:user_by_login_password(Login, Password), IP);
  78 % Un utilisateur se logge (avec un cookie)
  79 login([{cookie, Cookie}], IP) ->
  80    loginUser(euphorik_bd:user_by_cookie(Cookie), IP).
  81
  82 loginUser({ok, User}, IP) ->
  83    euphorik_bd:update_ip(User#user.id, IP),
  84    euphorik_bd:update_date_derniere_connexion(User#user.id),
  85    json_reponse_login_ok(User);
  86 loginUser(_, _) ->
  87    % ajoute un délais d'attente
  88    timer:sleep(1000),
  89    erreur("Erreur login").
  90
  91
  92 % Renvoie un string() représentant un cookie en base 36. Il y a 10^32 possibillités.
  93 generer_cookie() ->
  94    {A1,A2,A3} = now(),
  95    random:seed(A1, A2, A3),
  96    erlang:integer_to_list(random:uniform(math:pow(10, 32)), 36).
  97
  98
  99 % Un utilisateur se délogge.
 100 logout(_) ->
 101    do_nothing.
 102
 103
 104 % Modification du profile.
 105 profile(
 106    [
 107       {cookie, Cookie},
 108       {login, Login},
 109       {password, Password},
 110       {nick, Pseudo},
 111       {email, Email},
 112       {css, Css},
 113       {nick_format, Nick_format_str},
 114       {main_page, Main_page},
 115       {conversations, {array, Conversations_json}}
 116    ]
 117 ) ->
 118    % est-ce que les messages auquel on répond existent ?
 119    Conversations = lists:foldr(
 120       fun({struct, [{root, Root}, {page, Page}]}, Acc) ->
 121          Message_existe = euphorik_bd:message_existe(Root),
 122          if  Message_existe ->
 123             [{Root, Page} | Acc];
 124             true ->
 125                Acc
 126          end
 127       end,
 128       [],
 129       Conversations_json
 130    ),
 131    case euphorik_bd:set_profile(Cookie, Login, Password, Pseudo, Email, Css, list_to_atom(Nick_format_str), Main_page, Conversations) of
 132       ok ->
 133          json_reponse_ok();
 134       login_deja_pris ->
 135          erreur("Login déjà pris");
 136       _ ->
 137          erreur("Impossible de mettre à jour le profile")
 138    end.
 139
 140
 141 % Renvoie les messages appropriés.
 142 % last_message id et cookie sont facultatifs
 143 wait_event([{page, "chat"} | Data]) ->
 144    % traitement des inputs
 145    Cookie = case lists:keysearch(cookie, 1, Data) of {value, {_, C}} -> C; _ -> inconnu end,
 146    Last_message_id = case lists:keysearch(last_message_id, 1, Data) of {value, {_, Id}} -> Id; _ -> 0 end,
 147    {value, {_, Message_count}} = lists:keysearch(message_count, 1, Data),
 148    Main_page = case lists:keysearch(main_page, 1, Data) of {value, {_, P}} -> P; _ -> 1 end,
 149    Troll_id = case lists:keysearch(troll_id, 1, Data) of {value, {_, T}} -> T; _ -> 0 end,
 150    {value, {_, {array, Conversations_json}}} = lists:keysearch(conversations, 1, Data),
 151    Racines_conversations = lists:map(
 152       fun({struct, [{root, Racine}, {page, Page} | Reste]}) ->
 153          Last_mess_conv  = case Reste of [{last_message_id, L}] -> L; _ -> 0 end,
 154          {Racine, Page, Last_mess_conv}
 155       end,
 156       Conversations_json
 157    ),
 158    User = case euphorik_bd:user_by_cookie(Cookie) of
 159       {ok, U} -> U;
 160       _ -> inconnu
 161    end,
 162    case {mnesia:subscribe({table, minichat, detailed}), mnesia:subscribe({table, troll, detailed})} of
 163       {{error, E}, _} -> E;
 164       {_, {error, E}} -> E;
 165       _ ->
 166          % attente d'événements
 167          R = wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id),
 168          mnesia:unsubscribe({table, minichat, detailed}),
 169          mnesia:unsubscribe({table, troll, detailed}),
 170          R
 171    end;
 172 wait_event([{page, "admin"}, {last_troll, Last_troll}]) ->
 173    case wait_event_page_admin(Last_troll) of
 174       banned_ips_refresh ->
 175          {struct,
 176             [
 177                {reply, "banned_ips_refresh"}
 178             ]
 179          };
 180       {mod, Troll} ->
 181          {struct,
 182             [
 183                {reply, "troll_modified"},
 184                {troll_id, Troll#troll.id},
 185                {content, Troll#troll.content}
 186             ]
 187          };
 188       {add, Trolls} ->
 189          {struct,
 190             [
 191                {reply, "troll_added"},
 192                {trolls, {array,
 193                   lists:map(
 194                      fun(T) ->
 195                         {ok, User} = euphorik_bd:user_by_id(T#troll.id_user),
 196                         {struct,
 197                            [
 198                               {troll_id, T#troll.id},
 199                               {content, T#troll.content},
 200                               {author, User#user.pseudo},
 201                               {author_id, User#user.id}
 202                            ]
 203                         }
 204                      end,
 205                      Trolls
 206                   )
 207                }}
 208             ]
 209          };
 210       {del, Troll_id} ->
 211          {struct,
 212             [
 213                {reply, "troll_deleted"},
 214                {troll_id, Troll_id}
 215             ]
 216          };
 217       _ ->
 218          erreur("timeout")
 219    end;
 220 wait_event(_) ->
 221    erreur("Page inconnue").
 222
 223
 224 wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id) ->
 225    % est-ce que le troll est à jour ?
 226    case euphorik_bd:current_troll() of
 227       Current when is_record(Current, troll), Current#troll.id =/= Troll_id ->
 228          {struct, [
 229             {reply, "new_troll"},
 230             {troll_id, Current#troll.id},
 231             {message_id, euphorik_bd:message_id_associe(Current#troll.id)},
 232             {content, Current#troll.content}
 233          ]};
 234       _ ->
 235          % est-ce qu'il y a des nouveaux messages ?
 236          case euphorik_minichat_conversation:conversations(Racines_conversations, Message_count, Last_message_id, Main_page) of
 237             vide ->
 238                wait_event_bd_page_chat(),
 239                % TODO : l'appel est-il bien tail-recursive  ?
 240                wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id);
 241             Conversations ->
 242                % accrochez-vous ca va siouxer ;)
 243                {struct, [
 244                   {reply, "new_messages"},
 245                   {conversations, {array,
 246                      lists:map(
 247                         fun({Conv, Plus}) ->
 248                            {struct, [
 249                               {last_page, not Plus},
 250                               {messages, {array,
 251                                  lists:map(
 252                                     fun({Mess, Repond_a}) ->
 253                                        Est_proprietaire = User =/= inconnu andalso User#user.id =:= Mess#minichat.auteur_id,
 254                                        A_repondu_a_message = User =/= inconnu andalso euphorik_bd:a_repondu_a_message(User#user.id, Mess#minichat.id),
 255                                        Est_une_reponse_a_user = User =/= inconnu andalso euphorik_bd:est_une_reponse_a_user(User#user.id, Mess#minichat.id),
 256                                        {ok, User_mess } = euphorik_bd:user_by_id(Mess#minichat.auteur_id),
 257                                        {struct, [
 258                                           {id, Mess#minichat.id},
 259                                           {user_id, User_mess#user.id},
 260                                           {date, format_date(Mess#minichat.date)},
 261                                           {system, Mess#minichat.auteur_id =:= 0},
 262                                           {owner, Est_proprietaire},
 263                                           {answered, A_repondu_a_message},
 264                                           {is_a_reply, Est_une_reponse_a_user},
 265                                           {nick, Mess#minichat.pseudo},
 266                                           {login, User_mess#user.login},
 267                                           {content, Mess#minichat.contenu},
 268                                           {answer_to, {array, lists:map(
 269                                              fun(Id_mess) ->
 270                                                 {ok, M} = euphorik_bd:message_by_id(Id_mess),
 271                                                 {ok, User_reponse} = euphorik_bd:user_by_mess(M#minichat.id),
 272                                                 {struct, [{id, M#minichat.id}, {nick, M#minichat.pseudo}, {login, User_reponse#user.login}]}
 273                                              end,
 274                                              Repond_a
 275                                           )}},
 276                                           {ek_master, User_mess#user.ek_master}
 277                                        ]}
 278                                     end,
 279                                     Conv
 280                                  )
 281                               }}
 282                            ]}
 283                         end,
 284                         Conversations
 285                      )
 286                   }}
 287                ]}
 288          end
 289    end.
 290
 291
 292 % Attend un événement lié à la page 'chat'.
 293 wait_event_bd_page_chat() ->
 294    receive % attente d'un post
 295       {mnesia_table_event, {write, minichat, _Message, [], _}} ->
 296          ok;
 297       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}} when Troll#troll.date_post =/= undefined, Old_troll#troll.date_post == undefined ->
 298          ok;
 299       {tcp_closed, _} ->
 300          exit(normal);
 301       _ ->
 302          wait_event_bd_page_chat()
 303    % 60 minutes de timeout (on ne sais jamais)
 304    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 305    after 1000 * 60 * 60 ->
 306       timeout
 307    end.
 308
 309
 310 % Attent un événement concernant la page admin
 311 % Renvoie les trolls manquants posté après Last_id ou banned_ips_refresh.
 312 % Si pas de trolls alors attend un événement tel qu'un ajout, une modification ou une suppression.
 313 % renvoie :
 314 %  {mod, Troll}
 315 % ou {add, [Trolls]}
 316 % ou {del, Troll_id}
 317 % ou banned_ips_refresh
 318 % ou timeout
 319 wait_event_page_admin(Last_id) ->
 320    case {mnesia:subscribe({table, troll, detailed}), mnesia:subscribe({table, ip_table, detailed})} of
 321       {{error, E}, _ } -> E;
 322       {_, {error, E}} -> E;
 323       _ ->
 324          R = case euphorik_bd:trolls(Last_id) of
 325                [] -> % pas de trolls
 326                   wait_event_page_admin();
 327                Trolls ->
 328                   {add, Trolls}
 329          end,
 330          mnesia:unsubscribe({table, troll, detailed}),
 331          mnesia:unsubscribe({table, ip_table, detailed}),
 332          R
 333    end.
 334
 335 wait_event_page_admin() ->
 336    % s'il n'y a pas de trolls que l'utilisateur n'a pas connaissance alors on attend un événement
 337    receive
 338       % cas où un troll est choisit comme courant
 339       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}}
 340          when Old_troll#troll.date_post =:= undefined, Troll#troll.date_post =/= undefined ->
 341          {del, Troll#troll.id};
 342       {mnesia_table_event, {write, troll, Troll, [_Old_troll | _], _}} ->
 343          {mod, Troll};
 344       {mnesia_table_event, {write, troll, Troll, [], _}} ->
 345          {add, [Troll]};
 346       {mnesia_table_event, {delete, troll, {troll, Id}, _, _}} ->
 347          {del, Id};
 348       {mnesia_table_event, {write, ip_table, IP, [Old_IP | _], _}}
 349          when Old_IP#ip_table.ban =/= IP#ip_table.ban; Old_IP#ip_table.ban_duration =/= IP#ip_table.ban_duration ->
 350          banned_ips_refresh;
 351       {tcp_closed, _} ->
 352          exit(normal);
 353       _ ->
 354          wait_event_page_admin()
 355    % 60 minutes de timeout (on ne sais jamais)
 356    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 357    after 1000 * 60 * 60 ->
 358       timeout
 359    end.
 360
 361
 362 % Un utilisateur envoie un message
 363 put_message(
 364    [
 365       {cookie, Cookie},
 366       {nick, Nick},
 367       {content, Content},
 368       {answer_to, {array, Answer_to}}
 369    ]
 370 ) ->
 371    case euphorik_bd:user_by_cookie(Cookie) of
 372       {ok, User} ->
 373          case euphorik_bd:est_banni(User#user.id) of
 374             {true, Temps_restant} ->
 375                erreur("Vous êtes banni pour encore " ++ format_minutes(Temps_restant));
 376             _ ->
 377                Strip_content = string:strip(Content),
 378                if Strip_content =:= [] ->
 379                      erreur("Message vide");
 380                   true ->
 381                      % TODO : non-atomique (update_pseudo+nouveau_message)
 382                      euphorik_bd:update_pseudo_user(User#user.id, Nick),
 383                      case euphorik_bd:nouveau_message(Strip_content, User#user.id, Answer_to) of
 384                         {erreur, R} -> erreur("Impossible d'ajouter un nouveau message. Raison : " ++ R);
 385                         _ ->
 386                            json_reponse_ok()
 387                      end
 388                end
 389          end;
 390    _ ->
 391       erreur("Utilisateur inconnu")
 392    end.
 393
 394
 395 % bannissement d'un utilisateur (son ip est bannie)
 396 ban(
 397    [
 398       {cookie, Cookie},
 399       {duration, Duration},
 400       {user_id, User_id},
 401       {reason, Reason}
 402    ]) ->
 403       % controle que l'utilisateur est un admin
 404       case euphorik_bd:user_by_cookie(Cookie) of
 405          {ok, User1 = #user{ek_master = true}} ->
 406             case euphorik_bd:user_by_id(User_id) of
 407                {ok, User1} ->
 408                   erreur("Il n'est pas possible de s'auto bannir");
 409                {ok, User2 = #user{ek_master = false}} ->
 410                   euphorik_bd:ban(User2#user.last_ip, Duration),
 411                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("''~s~s'' est ~s pour ~s.~s",
 412                      [
 413                         User2#user.pseudo,
 414                         if User2#user.login =:= [] -> ""; true -> " (" ++ User2#user.login ++ ")" end,
 415                         if Duration =< 15 -> "kické"; true -> "banni" end,
 416                         format_minutes(Duration),
 417                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 418                      ]
 419                   ))),
 420                   json_reponse_ok();
 421                {ok, _} ->
 422                   erreur("L'utilisateur est lui même un ekMaster");
 423                _ ->
 424                   erreur("Utilisateur à bannir inconnu")
 425             end;
 426          _ ->
 427             erreur("Utilisateur inconnu ou non ek master")
 428       end.
 429
 430
 431 % slapage d'un user (avertissement)
 432 slap(
 433    [
 434       {cookie, Cookie},
 435       {user_id, User_id},
 436       {reason, Reason}
 437    ]) ->
 438       % controle que l'utilisateur est un admin
 439       case euphorik_bd:user_by_cookie(Cookie) of
 440          {ok, User1 = #user{ek_master = true}} ->
 441             case euphorik_bd:user_by_id(User_id) of
 442                {ok, User1} ->
 443                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s s'auto slap~s.",
 444                      [
 445                         User1#user.pseudo,
 446                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end
 447                      ]
 448                   ))),
 449                   json_reponse_ok();
 450                {ok, User2 = #user{ek_master = false}} ->
 451                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s se fait slaper par ~s.~s",
 452                      [
 453                         User2#user.pseudo,
 454                         User1#user.pseudo,
 455                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 456                      ]
 457                   ))),
 458                   json_reponse_ok();
 459                {ok, _} ->
 460                   erreur("L'utilisateur est lui même un ekMaster");
 461                _ ->
 462                   erreur("Utilisateur à slaper inconnu")
 463             end;
 464          _ ->
 465             erreur("Utilisateur inconnu ou non ek master")
 466       end.
 467
 468
 469 put_troll(
 470    [
 471       {cookie, Cookie},
 472       {content, Content}
 473    ]
 474 ) ->
 475    % controle que l'utilisateur est un admin
 476    case euphorik_bd:user_by_cookie(Cookie) of
 477       {ok, User = #user{ek_master = true}} ->
 478          case euphorik_bd:put_troll(User#user.id, Content) of
 479             max_troll_reached_per_user ->
 480                erreur(lists:flatten(io_lib:format("Le nombre de troll maximum par utilisateur est atteint : ~w ", [?NB_MAX_TROLL_WAITING_BY_USER])));
 481             max_troll_reached ->
 482                erreur(lists:flatten(io_lib:format("Le nombre de troll maximum en attente est atteint : ~w ", [?NB_MAX_TROLL_WAITING])));
 483             _Id ->
 484                json_reponse_ok()
 485          end;
 486       _ ->
 487          erreur("Seul les ekMaster peuvent proposer des trolls")
 488    end.
 489
 490
 491 mod_troll(
 492    [
 493       {cookie, Cookie},
 494       {troll_id, Troll_id},
 495       {content, Content}
 496    ]
 497 ) ->
 498    % controle que l'utilisateur est un admin
 499    case euphorik_bd:user_by_cookie(Cookie) of
 500       {ok, User = #user{ek_master = true}} ->
 501          User_id = User#user.id,
 502          case euphorik_bd:troll_by_id(Troll_id) of
 503             {ok, #troll{id_user = User_id}} ->
 504                euphorik_bd:mod_troll(Troll_id, Content),
 505                json_reponse_ok();
 506             _ ->
 507                erreur("Vous ne posséder pas ce troll")
 508          end;
 509       _ ->
 510          erreur("Seul les ekMaster peuvent proposer des trolls")
 511       end.
 512
 513
 514 del_troll(
 515    [
 516       {cookie, Cookie},
 517       {troll_id, Troll_id}
 518    ]
 519 ) ->
 520    % controle que l'utilisateur est un admin
 521    case euphorik_bd:user_by_cookie(Cookie) of
 522       {ok, User = #user{ek_master = true}} ->
 523          User_id = User#user.id,
 524          case euphorik_bd:troll_by_id(Troll_id) of
 525             {ok, #troll{id_user = User_id}} ->
 526                euphorik_bd:del_troll(Troll_id),
 527                json_reponse_ok();
 528             _ ->
 529                erreur("Vous ne posséder pas ce troll")
 530          end;
 531       _ ->
 532          erreur("Seul les ekMaster peuvent proposer des trolls")
 533    end.
 534
 535
 536 unban_ip(
 537    [
 538       {cookie, Cookie},
 539       {ip, IP}
 540    ]
 541 ) ->
 542    case euphorik_bd:user_by_cookie(Cookie) of
 543       {ok, #user{ek_master = true}} ->
 544          euphorik_bd:deban(unserialize_ip(IP)),
 545          json_reponse_ok();
 546       _ ->
 547          erreur("Seul les ekMaster peuvent connaitre la liste des ips bannies")
 548    end.
 549
 550
 551 list_banned_ips(
 552    [
 553       {cookie, Cookie}
 554    ]
 555 ) ->
 556    case euphorik_bd:user_by_cookie(Cookie) of
 557       {ok, #user{ek_master = true}} ->
 558          {
 559             struct,
 560             [
 561                {reply, "list_banned_ips"},
 562                {list, {array, lists:map(
 563                   fun({IP, T, Users}) ->
 564                      {struct,
 565                         [
 566                            {ip, serialize_ip(IP)},
 567                            {remaining_time, format_minutes(T)},
 568                            {users, {array, lists:map(
 569                               fun({Pseudo, Login}) ->
 570                                  {struct,
 571                                     [
 572                                        {nick, Pseudo},
 573                                        {login, Login}
 574                                     ]
 575                                  }
 576                               end,
 577                               Users
 578                            )}}
 579                         ]
 580                      }
 581                   end,
 582                   euphorik_bd:list_ban()
 583                )}}
 584             ]
 585          };
 586       _ ->
 587          erreur("Seul les ekMaster peuvent connaitre la liste des ips bannies")
 588    end.
 589
 590
 591 % Construit une erreur
 592 erreur(Message) ->
 593    {
 594       struct, [
 595          {reply, "error"},
 596          {error_message, Message}
 597       ]
 598    }.
 599
 600
 601 serialize_ip(IP) ->
 602    lists:flatten(io_lib:format("~w.~w.~w.~w", tuple_to_list(IP))).
 603
 604
 605 unserialize_ip(IP) ->
 606    case io_lib:fread("~d.~d.~d.~d", IP) of
 607       {ok, [A, B, C, D], []} -> {A, B, C, D};
 608       _  -> erreur
 609    end.
 610
 611
 612 % Formatage de minutes.
 613 % par exemple : "1min", "45min", "1h23min", "1jour 2h34min"
 614 format_minutes(Min) ->
 615    Jours = Min div (60 * 24),
 616    Heures = Min rem (60 * 24) div 60,
 617    Minutes = Min rem (60),
 618    if Jours =/= 0 -> integer_to_list(Jours) ++ " Jour" ++ if Jours > 1 -> "s"; true -> "" end ++ " "; true -> "" end ++
 619    if Heures =/= 0 -> integer_to_list(Heures) ++ " heure"  ++ if Heures > 1 -> "s"; true -> "" end; true -> "" end ++
 620    if Minutes == 0 ->
 621          "";
 622       true ->
 623          " " ++ integer_to_list(Minutes) ++ " minute"  ++ if Minutes > 1 -> "s"; true -> "" end
 624    end.
 625
 626
 627 % Formatage d'une heure
 628 % local_time() -> string
 629 format_date(Date) ->
 630    DateLocal = calendar:now_to_local_time(Date),
 631    DateNowLocal = calendar:local_time(),
 632    {{Annee, Mois, Jour}, {Heure, Minute, Seconde}} = DateLocal,
 633    {{AnneeNow, _, _}, {_, _, _}} = DateNowLocal,
 634    Hier = calendar:date_to_gregorian_days(element(1, DateLocal)) =:=  calendar:date_to_gregorian_days(element(1, DateNowLocal)) - 1,
 635    lists:flatten(
 636       if element(1, DateLocal) =:= element(1, DateNowLocal) ->
 637          "";
 638          Hier ->
 639             "Hier ";
 640          Annee =:= AnneeNow ->
 641             io_lib:format("~2.10.0B/~2.10.0B ", [Jour, Mois]);
 642          true ->
 643             io_lib:format("~2.10.0B/~2.10.0B/~B ", [Jour, Mois, Annee])
 644       end ++
 645       io_lib:format("~2.10.0B:~2.10.0B:~2.10.0B", [Heure, Minute, Seconde])
 646    ).
 647
 648
 649 json_reponse_ok() ->
 650    {struct, [{reply, "ok"}]}.
 651
 652
 653 json_reponse_login_ok(User) ->
 654    {
 655       struct, [
 656          {reply, "login"},
 657          {status, if (User#user.password =/= []) and (User#user.login =/= []) -> "auth_registered"; true -> "auth_not_registered" end},
 658          {cookie, User#user.cookie},
 659          {id, User#user.id},
 660          {nick, User#user.pseudo},
 661          {login, User#user.login},
 662          {email, User#user.email},
 663          {css, User#user.css},
 664          {nick_format, atom_to_list(User#user.nick_format)},
 665          {main_page, User#user.page_principale},
 666          {conversations,
 667             {array,
 668                lists:map(
 669                   fun(C) ->
 670                      {struct,
 671                         [
 672                            {root, element(1, C)},
 673                            {page, element(2, C)}
 674                         ]
 675                      }
 676                   end,
 677                   User#user.conversations
 678                )
 679             }
 680          },
 681       {ek_master, User#user.ek_master}
 682       ]
 683    }.