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(?TEMPS_ATTENTE_ERREUR_LOGIN),
  89    erreur("Couple login/pass introuvable").
  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       {view_times, View_times},
 115       {view_tooltips, View_tooltips},
 116       {main_page, Main_page},
 117       {conversations, {array, Conversations_json}}
 118    ]
 119 ) ->
 120    % est-ce que les messages auquel on répond existent ?
 121    Conversations = lists:foldr(
 122       fun({struct, [{root, Root}, {page, Page}]}, Acc) ->
 123          Message_existe = euphorik_bd:message_existe(Root),
 124          if  Message_existe ->
 125             [{Root, Page} | Acc];
 126             true ->
 127                Acc
 128          end
 129       end,
 130       [],
 131       Conversations_json
 132    ),
 133    %  TODO : pas très beau, mieux vaut construire un #user
 134    case euphorik_bd:set_profile(
 135          Cookie,
 136          Login,
 137          Password,
 138          Pseudo,
 139          Email,
 140          Css,
 141          list_to_atom(Nick_format_str),
 142          View_times,
 143          View_tooltips,
 144          Main_page,
 145          Conversations) of
 146       ok ->
 147          json_reponse_ok();
 148       login_deja_pris ->
 149          erreur("Login déjà pris");
 150       _ ->
 151          erreur("Impossible de mettre à jour le profile")
 152    end.
 153
 154
 155 % Renvoie les messages appropriés.
 156 % last_message id et cookie sont facultatifs
 157 wait_event([{page, "chat"} | Data]) ->
 158    % traitement des inputs
 159    Cookie = case lists:keysearch(cookie, 1, Data) of {value, {_, C}} -> C; _ -> inconnu end,
 160    Last_message_id = case lists:keysearch(last_message_id, 1, Data) of {value, {_, Id}} -> Id; _ -> 0 end,
 161    {value, {_, Message_count}} = lists:keysearch(message_count, 1, Data),
 162    Main_page = case lists:keysearch(main_page, 1, Data) of {value, {_, P}} -> P; _ -> 1 end,
 163    Troll_id = case lists:keysearch(troll_id, 1, Data) of {value, {_, T}} -> T; _ -> 0 end,
 164    {value, {_, {array, Conversations_json}}} = lists:keysearch(conversations, 1, Data),
 165    Racines_conversations = lists:map(
 166       fun({struct, [{root, Racine}, {page, Page} | Reste]}) ->
 167          Last_mess_conv  = case Reste of [{last_message_id, L}] -> L; _ -> 0 end,
 168          {Racine, Page, Last_mess_conv}
 169       end,
 170       Conversations_json
 171    ),
 172    User = case euphorik_bd:user_by_cookie(Cookie) of
 173       {ok, U} -> U;
 174       _ -> inconnu
 175    end,
 176    case {mnesia:subscribe({table, minichat, detailed}), mnesia:subscribe({table, troll, detailed})} of
 177       {{error, E}, _} -> E;
 178       {_, {error, E}} -> E;
 179       _ ->
 180          % attente d'événements
 181          R = wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id),
 182          mnesia:unsubscribe({table, minichat, detailed}),
 183          mnesia:unsubscribe({table, troll, detailed}),
 184          R
 185    end;
 186 wait_event([{page, "admin"}, {last_troll, Last_troll}]) ->
 187    case wait_event_page_admin(Last_troll) of
 188       banned_ips_refresh ->
 189          {struct,
 190             [
 191                {reply, "banned_ips_refresh"}
 192             ]
 193          };
 194       {mod, Troll} ->
 195          {struct,
 196             [
 197                {reply, "troll_modified"},
 198                {troll_id, Troll#troll.id},
 199                {content, Troll#troll.content}
 200             ]
 201          };
 202       {add, Trolls} ->
 203          {struct,
 204             [
 205                {reply, "troll_added"},
 206                {trolls, {array,
 207                   lists:map(
 208                      fun(T) ->
 209                         {ok, User} = euphorik_bd:user_by_id(T#troll.id_user),
 210                         {struct,
 211                            [
 212                               {troll_id, T#troll.id},
 213                               {content, T#troll.content},
 214                               {author, User#user.pseudo},
 215                               {author_id, User#user.id}
 216                            ]
 217                         }
 218                      end,
 219                      Trolls
 220                   )
 221                }}
 222             ]
 223          };
 224       {del, Troll_id} ->
 225          {struct,
 226             [
 227                {reply, "troll_deleted"},
 228                {troll_id, Troll_id}
 229             ]
 230          };
 231       _ ->
 232          erreur("timeout")
 233    end;
 234 wait_event(_) ->
 235    erreur("Page inconnue").
 236
 237
 238 wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id) ->
 239    % est-ce que le troll est à jour ?
 240    case euphorik_bd:current_troll() of
 241       Current when is_record(Current, troll), Current#troll.id =/= Troll_id ->
 242          {struct, [
 243             {reply, "new_troll"},
 244             {troll_id, Current#troll.id},
 245             {message_id, euphorik_bd:message_id_associe(Current#troll.id)},
 246             {content, Current#troll.content}
 247          ]};
 248       _ ->
 249          % est-ce qu'il y a des nouveaux messages ?
 250          case euphorik_minichat_conversation:conversations(Racines_conversations, Message_count, Last_message_id, Main_page) of
 251             vide ->
 252                wait_event_bd_page_chat(),
 253                % TODO : l'appel est-il bien tail-recursive  ?
 254                wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id);
 255             Conversations ->
 256                % accrochez-vous ca va siouxer ;)
 257                {struct, [
 258                   {reply, "new_messages"},
 259                   {conversations, {array,
 260                      lists:map(
 261                         fun({Conv, Plus}) ->
 262                            {struct, [
 263                               {last_page, not Plus},
 264                               {messages, {array,
 265                                  lists:map(
 266                                     fun({Mess, Repond_a}) ->
 267                                        Est_proprietaire = User =/= inconnu andalso User#user.id =:= Mess#minichat.auteur_id,
 268                                        A_repondu_a_message = User =/= inconnu andalso euphorik_bd:a_repondu_a_message(User#user.id, Mess#minichat.id),
 269                                        Est_une_reponse_a_user = User =/= inconnu andalso euphorik_bd:est_une_reponse_a_user(User#user.id, Mess#minichat.id),
 270                                        {ok, User_mess } = euphorik_bd:user_by_id(Mess#minichat.auteur_id),
 271                                        {struct, [
 272                                           {id, Mess#minichat.id},
 273                                           {user_id, User_mess#user.id},
 274                                           {date, format_date(Mess#minichat.date)},
 275                                           {system, Mess#minichat.auteur_id =:= 0},
 276                                           {owner, Est_proprietaire},
 277                                           {answered, A_repondu_a_message},
 278                                           {is_a_reply, Est_une_reponse_a_user},
 279                                           {nick, Mess#minichat.pseudo},
 280                                           {login, User_mess#user.login},
 281                                           {content, Mess#minichat.contenu},
 282                                           {answer_to, {array, lists:map(
 283                                              fun(Id_mess) ->
 284                                                 {ok, M} = euphorik_bd:message_by_id(Id_mess),
 285                                                 {ok, User_reponse} = euphorik_bd:user_by_mess(M#minichat.id),
 286                                                 {struct, [{id, M#minichat.id}, {nick, M#minichat.pseudo}, {login, User_reponse#user.login}]}
 287                                              end,
 288                                              Repond_a
 289                                           )}},
 290                                           {ek_master, User_mess#user.ek_master}
 291                                        ]}
 292                                     end,
 293                                     Conv
 294                                  )
 295                               }}
 296                            ]}
 297                         end,
 298                         Conversations
 299                      )
 300                   }}
 301                ]}
 302          end
 303    end.
 304
 305
 306 % Attend un événement lié à la page 'chat'.
 307 wait_event_bd_page_chat() ->
 308    receive % attente d'un post
 309       {mnesia_table_event, {write, minichat, _Message, [], _}} ->
 310          ok;
 311       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}} when Troll#troll.date_post =/= undefined, Old_troll#troll.date_post == undefined ->
 312          ok;
 313       {tcp_closed, _} ->
 314          exit(normal);
 315       _ ->
 316          wait_event_bd_page_chat()
 317    % 60 minutes de timeout (on ne sais jamais)
 318    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 319    after 1000 * 60 * 60 ->
 320       timeout
 321    end.
 322
 323
 324 % Attent un événement concernant la page admin
 325 % Renvoie les trolls manquants posté après Last_id ou banned_ips_refresh.
 326 % Si pas de trolls alors attend un événement tel qu'un ajout, une modification ou une suppression.
 327 % renvoie :
 328 %  {mod, Troll}
 329 % ou {add, [Trolls]}
 330 % ou {del, Troll_id}
 331 % ou banned_ips_refresh
 332 % ou timeout
 333 wait_event_page_admin(Last_id) ->
 334    case {mnesia:subscribe({table, troll, detailed}), mnesia:subscribe({table, ip_table, detailed})} of
 335       {{error, E}, _ } -> E;
 336       {_, {error, E}} -> E;
 337       _ ->
 338          R = case euphorik_bd:trolls(Last_id) of
 339                [] -> % pas de trolls
 340                   wait_event_page_admin();
 341                Trolls ->
 342                   {add, Trolls}
 343          end,
 344          mnesia:unsubscribe({table, troll, detailed}),
 345          mnesia:unsubscribe({table, ip_table, detailed}),
 346          R
 347    end.
 348
 349 wait_event_page_admin() ->
 350    % s'il n'y a pas de trolls que l'utilisateur n'a pas connaissance alors on attend un événement
 351    receive
 352       % cas où un troll est choisit comme courant
 353       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}}
 354          when Old_troll#troll.date_post =:= undefined, Troll#troll.date_post =/= undefined ->
 355          {del, Troll#troll.id};
 356       {mnesia_table_event, {write, troll, Troll, [_Old_troll | _], _}} ->
 357          {mod, Troll};
 358       {mnesia_table_event, {write, troll, Troll, [], _}} ->
 359          {add, [Troll]};
 360       {mnesia_table_event, {delete, troll, {troll, Id}, _, _}} ->
 361          {del, Id};
 362       {mnesia_table_event, {write, ip_table, IP, [Old_IP | _], _}}
 363          when Old_IP#ip_table.ban =/= IP#ip_table.ban; Old_IP#ip_table.ban_duration =/= IP#ip_table.ban_duration ->
 364          banned_ips_refresh;
 365       {tcp_closed, _} ->
 366          exit(normal);
 367       _ ->
 368          wait_event_page_admin()
 369    % 60 minutes de timeout (on ne sais jamais)
 370    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 371    after 1000 * 60 * 60 ->
 372       timeout
 373    end.
 374
 375
 376 % Un utilisateur envoie un message
 377 put_message(
 378    [
 379       {cookie, Cookie},
 380       {nick, Nick},
 381       {content, Content},
 382       {answer_to, {array, Answer_to}}
 383    ]
 384 ) ->
 385    case euphorik_bd:user_by_cookie(Cookie) of
 386       {ok, User} ->
 387          case euphorik_bd:est_banni(User#user.id) of
 388             {true, Temps_restant} ->
 389                erreur("Vous êtes banni pour encore " ++ format_minutes(Temps_restant));
 390             _ ->
 391                Strip_content = string:strip(Content),
 392                if Strip_content =:= [] ->
 393                      erreur("Message vide");
 394                   true ->
 395                      % TODO : non-atomique (update_pseudo+nouveau_message)
 396                      euphorik_bd:update_pseudo_user(User#user.id, Nick),
 397                      case euphorik_bd:nouveau_message(Strip_content, User#user.id, Answer_to) of
 398                         {erreur, R} -> erreur("Impossible d'ajouter un nouveau message. Raison : " ++ R);
 399                         _ ->
 400                            json_reponse_ok()
 401                      end
 402                end
 403          end;
 404    _ ->
 405       erreur("Utilisateur inconnu")
 406    end.
 407
 408
 409 % bannissement d'un utilisateur (son ip est bannie)
 410 ban(
 411    [
 412       {cookie, Cookie},
 413       {duration, Duration},
 414       {user_id, User_id},
 415       {reason, Reason}
 416    ]) ->
 417       % controle que l'utilisateur est un admin
 418       case euphorik_bd:user_by_cookie(Cookie) of
 419          {ok, User1 = #user{ek_master = true}} ->
 420             case euphorik_bd:user_by_id(User_id) of
 421                {ok, User1} ->
 422                   erreur("Il n'est pas possible de s'auto bannir");
 423                {ok, User2 = #user{ek_master = false}} ->
 424                   euphorik_bd:ban(User2#user.last_ip, Duration),
 425                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("''~s~s'' est ~s pour ~s.~s",
 426                      [
 427                         User2#user.pseudo,
 428                         if User2#user.login =:= [] -> ""; true -> " (" ++ User2#user.login ++ ")" end,
 429                         if Duration =< 15 -> "kické"; true -> "banni" end,
 430                         format_minutes(Duration),
 431                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 432                      ]
 433                   ))),
 434                   json_reponse_ok();
 435                {ok, _} ->
 436                   erreur("L'utilisateur est lui même un ekMaster");
 437                _ ->
 438                   erreur("Utilisateur à bannir inconnu")
 439             end;
 440          _ ->
 441             erreur("Utilisateur inconnu ou non ek master")
 442       end.
 443
 444
 445 % slapage d'un user (avertissement)
 446 slap(
 447    [
 448       {cookie, Cookie},
 449       {user_id, User_id},
 450       {reason, Reason}
 451    ]) ->
 452       % controle que l'utilisateur est un admin
 453       case euphorik_bd:user_by_cookie(Cookie) of
 454          {ok, User1 = #user{ek_master = true}} ->
 455             case euphorik_bd:user_by_id(User_id) of
 456                {ok, User1} ->
 457                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s s'auto slap~s.",
 458                      [
 459                         User1#user.pseudo,
 460                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end
 461                      ]
 462                   ))),
 463                   json_reponse_ok();
 464                {ok, User2 = #user{ek_master = false}} ->
 465                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s se fait slaper par ~s.~s",
 466                      [
 467                         User2#user.pseudo,
 468                         User1#user.pseudo,
 469                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 470                      ]
 471                   ))),
 472                   json_reponse_ok();
 473                {ok, _} ->
 474                   erreur("L'utilisateur est lui même un ekMaster");
 475                _ ->
 476                   erreur("Utilisateur à slaper inconnu")
 477             end;
 478          _ ->
 479             erreur("Utilisateur inconnu ou non ek master")
 480       end.
 481
 482
 483 put_troll(
 484    [
 485       {cookie, Cookie},
 486       {content, Content}
 487    ]
 488 ) ->
 489    % controle que l'utilisateur est un admin
 490    case euphorik_bd:user_by_cookie(Cookie) of
 491       {ok, User = #user{ek_master = true}} ->
 492          case euphorik_bd:put_troll(User#user.id, Content) of
 493             max_troll_reached_per_user ->
 494                erreur(lists:flatten(io_lib:format("Le nombre de troll maximum par utilisateur est atteint : ~w ", [?NB_MAX_TROLL_WAITING_BY_USER])));
 495             max_troll_reached ->
 496                erreur(lists:flatten(io_lib:format("Le nombre de troll maximum en attente est atteint : ~w ", [?NB_MAX_TROLL_WAITING])));
 497             _Id ->
 498                json_reponse_ok()
 499          end;
 500       _ ->
 501          erreur("Seul les ekMaster peuvent proposer des trolls")
 502    end.
 503
 504
 505 mod_troll(
 506    [
 507       {cookie, Cookie},
 508       {troll_id, Troll_id},
 509       {content, Content}
 510    ]
 511 ) ->
 512    % controle que l'utilisateur est un admin
 513    case euphorik_bd:user_by_cookie(Cookie) of
 514       {ok, User = #user{ek_master = true}} ->
 515          User_id = User#user.id,
 516          case euphorik_bd:troll_by_id(Troll_id) of
 517             {ok, #troll{id_user = User_id}} ->
 518                euphorik_bd:mod_troll(Troll_id, Content),
 519                json_reponse_ok();
 520             _ ->
 521                erreur("Vous ne posséder pas ce troll")
 522          end;
 523       _ ->
 524          erreur("Seul les ekMaster peuvent proposer des trolls")
 525       end.
 526
 527
 528 del_troll(
 529    [
 530       {cookie, Cookie},
 531       {troll_id, Troll_id}
 532    ]
 533 ) ->
 534    % controle que l'utilisateur est un admin
 535    case euphorik_bd:user_by_cookie(Cookie) of
 536       {ok, User = #user{ek_master = true}} ->
 537          User_id = User#user.id,
 538          case euphorik_bd:troll_by_id(Troll_id) of
 539             {ok, #troll{id_user = User_id}} ->
 540                euphorik_bd:del_troll(Troll_id),
 541                json_reponse_ok();
 542             _ ->
 543                erreur("Vous ne posséder pas ce troll")
 544          end;
 545       _ ->
 546          erreur("Seul les ekMaster peuvent proposer des trolls")
 547    end.
 548
 549
 550 unban_ip(
 551    [
 552       {cookie, Cookie},
 553       {ip, IP}
 554    ]
 555 ) ->
 556    case euphorik_bd:user_by_cookie(Cookie) of
 557       {ok, #user{ek_master = true}} ->
 558          euphorik_bd:deban(unserialize_ip(IP)),
 559          json_reponse_ok();
 560       _ ->
 561          erreur("Seul les ekMaster peuvent connaitre la liste des ips bannies")
 562    end.
 563
 564
 565 list_banned_ips(
 566    [
 567       {cookie, Cookie}
 568    ]
 569 ) ->
 570    case euphorik_bd:user_by_cookie(Cookie) of
 571       {ok, #user{ek_master = true}} ->
 572          {
 573             struct,
 574             [
 575                {reply, "list_banned_ips"},
 576                {list, {array, lists:map(
 577                   fun({IP, T, Users}) ->
 578                      {struct,
 579                         [
 580                            {ip, serialize_ip(IP)},
 581                            {remaining_time, format_minutes(T)},
 582                            {users, {array, lists:map(
 583                               fun({Pseudo, Login}) ->
 584                                  {struct,
 585                                     [
 586                                        {nick, Pseudo},
 587                                        {login, Login}
 588                                     ]
 589                                  }
 590                               end,
 591                               Users
 592                            )}}
 593                         ]
 594                      }
 595                   end,
 596                   euphorik_bd:list_ban()
 597                )}}
 598             ]
 599          };
 600       _ ->
 601          erreur("Seul les ekMaster peuvent connaitre la liste des ips bannies")
 602    end.
 603
 604
 605 % Construit une erreur
 606 erreur(Message) ->
 607    {
 608       struct, [
 609          {reply, "error"},
 610          {error_message, Message}
 611       ]
 612    }.
 613
 614
 615 serialize_ip(IP) ->
 616    lists:flatten(io_lib:format("~w.~w.~w.~w", tuple_to_list(IP))).
 617
 618
 619 unserialize_ip(IP) ->
 620    case io_lib:fread("~d.~d.~d.~d", IP) of
 621       {ok, [A, B, C, D], []} -> {A, B, C, D};
 622       _  -> erreur
 623    end.
 624
 625
 626 % Formatage de minutes.
 627 % par exemple : "1min", "45min", "1h23min", "1jour 2h34min"
 628 format_minutes(Min) ->
 629    Jours = Min div (60 * 24),
 630    Heures = Min rem (60 * 24) div 60,
 631    Minutes = Min rem (60),
 632    if Jours =/= 0 -> integer_to_list(Jours) ++ " Jour" ++ if Jours > 1 -> "s"; true -> "" end ++ " "; true -> "" end ++
 633    if Heures =/= 0 -> integer_to_list(Heures) ++ " heure"  ++ if Heures > 1 -> "s"; true -> "" end; true -> "" end ++
 634    if Minutes == 0 ->
 635          "";
 636       true ->
 637          " " ++ integer_to_list(Minutes) ++ " minute"  ++ if Minutes > 1 -> "s"; true -> "" end
 638    end.
 639
 640
 641 % Formatage d'une heure
 642 % local_time() -> string
 643 format_date(Date) ->
 644    DateLocal = calendar:now_to_local_time(Date),
 645    DateNowLocal = calendar:local_time(),
 646    {{Annee, Mois, Jour}, {Heure, Minute, Seconde}} = DateLocal,
 647    {{AnneeNow, _, _}, {_, _, _}} = DateNowLocal,
 648    Hier = calendar:date_to_gregorian_days(element(1, DateLocal)) =:=  calendar:date_to_gregorian_days(element(1, DateNowLocal)) - 1,
 649    lists:flatten(
 650       if element(1, DateLocal) =:= element(1, DateNowLocal) ->
 651          "";
 652          Hier ->
 653             "Hier ";
 654          Annee =:= AnneeNow ->
 655             io_lib:format("~2.10.0B/~2.10.0B ", [Jour, Mois]);
 656          true ->
 657             io_lib:format("~2.10.0B/~2.10.0B/~B ", [Jour, Mois, Annee])
 658       end ++
 659       io_lib:format("~2.10.0B:~2.10.0B:~2.10.0B", [Heure, Minute, Seconde])
 660    ).
 661
 662
 663 json_reponse_ok() ->
 664    {struct, [{reply, "ok"}]}.
 665
 666
 667 json_reponse_login_ok(User) ->
 668    {
 669       struct, [
 670          {reply, "login"},
 671          {status, if (User#user.password =/= []) and (User#user.login =/= []) -> "auth_registered"; true -> "auth_not_registered" end},
 672          {cookie, User#user.cookie},
 673          {id, User#user.id},
 674          {nick, User#user.pseudo},
 675          {login, User#user.login},
 676          {email, User#user.email},
 677          {css, User#user.css},
 678          {nick_format, atom_to_list(User#user.nick_format)},
 679          {view_times, User#user.view_times},
 680          {view_tooltips, User#user.view_tooltips},
 681          {main_page, User#user.page_principale},
 682          {conversations,
 683             {array,
 684                lists:map(
 685                   fun(C) ->
 686                      {struct,
 687                         [
 688                            {root, element(1, C)},
 689                            {page, element(2, C)}
 690                         ]
 691                      }
 692                   end,
 693                   User#user.conversations
 694                )
 695             }
 696          },
 697       {ek_master, User#user.ek_master}
 698       ]
 699    }.