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    profile/1,
  29    wait_event/1,
  30    put_message/1,
  31    ban/1,
  32    slap/1,
  33    put_troll/1,
  34    mod_troll/1,
  35    del_troll/1,
  36    unban_ip/1,
  37    list_banned_ips/1,
  38    erreur/1
  39 ]).
  40 -include("../include/euphorik_bd.hrl").
  41 -include("../include/euphorik_defines.hrl").
  42
  43
  44 % Une utilisateur s'enregistre avec un tuple {Login, Password}.
  45 register([{"login", Login}, {"password", Password}, {"profile", Profile_json}], IP) ->
  46    Can_register = euphorik_bd:can_register(IP),
  47    if Can_register ->
  48          case euphorik_bd:user_by_login(Login) of
  49             {ok, _} ->
  50                erreur(10);
  51             _ ->
  52                User = euphorik_bd:nouveau_user(Login, Password, generer_cookie(), profile_from_json(Profile_json)),
  53                euphorik_bd:update_ip(User#user.id, IP),
  54                json_reponse_login_ok(User)
  55          end;
  56       true ->
  57          erreur_register_flood()
  58    end;
  59 % Enregistrement sans {Login, Password}
  60 register([{"profile", Profile_json}], IP) ->
  61    Can_register = euphorik_bd:can_register(IP),
  62    if Can_register ->
  63          Profile = profile_from_json(Profile_json),
  64          User = euphorik_bd:nouveau_user(generer_cookie(), Profile#profile{pseudo = "<nick>"}),
  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(20).
  73
  74
  75 % Un utilisateur se logge (avec un couple {login, mot de passe})
  76 login([{"login", Login}, {"password", Password}], IP) ->
  77    case euphorik_bd:user_by_login_password(Login, Password) of
  78       {ok, User} ->
  79          loginUser(User, IP);
  80       _ ->
  81          timer:sleep(?TEMPS_ATTENTE_ERREUR_LOGIN),
  82          erreur(30)
  83    end;
  84 % Un utilisateur se logge (avec un cookie)
  85 login([{"cookie", Cookie}], IP) ->
  86    case euphorik_bd:user_by_cookie(Cookie) of
  87       {ok, User} ->
  88          loginUser(User, IP);
  89       _ ->
  90          timer:sleep(?TEMPS_ATTENTE_ERREUR_LOGIN),
  91          erreur(40)
  92    end.
  93
  94
  95 % L'utilisateur donné se logge avec l'ip donnée.
  96 loginUser(User, IP) ->
  97    euphorik_bd:update_ip(User#user.id, IP),
  98    euphorik_bd:update_date_derniere_connexion(User#user.id),
  99    json_reponse_login_ok(User).
 100
 101
 102 % Renvoie un string() représentant un cookie en base 36. Il y a 10^32 possibillités.
 103 generer_cookie() ->
 104    {A1, A2, A3} = erlang:timestamp(),
 105    random:seed(A1, A2, A3),
 106    erlang:integer_to_list(random:uniform(trunc(math:pow(10, 32))), 36).
 107
 108
 109 % Modification du profile.
 110 profile(
 111    [
 112       {"cookie", Cookie},
 113       {"login", Login},
 114       {"password", Password},
 115       {"profile", Profile_json}
 116    ]
 117 ) ->
 118    case profile_from_json(Profile_json) of
 119       {erreur, E} -> E;
 120       Profile ->
 121          case euphorik_bd:set_profile(Cookie, Login, Password, Profile) of
 122             ok ->
 123                json_reponse_ok();
 124             login_deja_pris ->
 125                erreur(10);
 126             _ ->
 127                erreur(50)
 128          end
 129    end.
 130
 131
 132 % Construit un #user à partir des données JSON
 133 profile_from_json(
 134    {struct,
 135       [
 136          {"nick", Pseudo},
 137          {"email", Email},
 138          {"css", Css},
 139          {"chat_order", Chat_order_str},
 140          {"nick_format", Nick_format_str},
 141          {"view_times", View_times},
 142          {"view_tooltips", View_tooltips},
 143          {"conversations", {array, Conversations_json}},
 144          {"ostentatious_master", Ostentatious_master_str}
 145       ]
 146    }
 147 ) ->
 148    % décomposition de la strucure JSON
 149    Conversations = lists:foldr(
 150       fun({struct, [{"root", Racine}, {"minimized", Reduit}]}, A) ->
 151          % virage des messages qui n'existent pas
 152          Message_exite = euphorik_bd:message_existe(Racine),
 153          if Message_exite ->
 154                [ {Racine, Reduit} | A];
 155             true ->
 156                A
 157          end
 158       end,
 159       [],
 160       Conversations_json
 161    ),
 162    % vérification des données JSON
 163    Chat_order = list_to_atom(Chat_order_str),
 164    Chat_order_valide = lists:any(fun(E) -> E =:= Chat_order end, [reverse, chrono]),
 165    if not Chat_order_valide ->
 166          {erreur, Chat_order_str ++ " n'est pas une valeur acceptée pour 'chat_order'"};
 167       true ->
 168          Nick_format = list_to_atom(Nick_format_str),
 169          Nick_format_valide = lists:any(fun(E) -> E =:= Nick_format end, [nick, login, nick_login]),
 170          if not Nick_format_valide ->
 171                {erreur, Nick_format_str ++ " n'est pas une valeur acceptée pour 'nick_format'"};
 172             true ->
 173                Ostentatious_master = list_to_atom(Ostentatious_master_str),
 174                Ostentatious_master_valide = lists:any(fun(E) -> E =:= Ostentatious_master end, [invisible, light, heavy]),
 175                if not Ostentatious_master_valide ->
 176                      {erreur, Ostentatious_master_str ++ " n'est pas une valeur acceptée pour 'ostentatious_master'"};
 177                   true ->
 178                      #profile{
 179                         pseudo = Pseudo,
 180                         email = Email,
 181                         css = Css,
 182                         chat_order = Chat_order,
 183                         nick_format = Nick_format,
 184                         view_times = View_times,
 185                         view_tooltips = View_tooltips,
 186                         conversations = Conversations,
 187                         ostentatious_master = Ostentatious_master
 188                      }
 189                end
 190          end
 191    end.
 192
 193
 194 % Attend un événement pour la page "Chat"
 195 % last_message id et cookie sont facultatifs
 196 wait_event([{"page", "chat"} | Data]) ->
 197    % traitement des inputs
 198    Cookie = case lists:keysearch("cookie", 1, Data) of {value, {_, C}} -> C; _ -> inconnu end,
 199    Last_message_id = case lists:keysearch("last_message_id", 1, Data) of {value, {_, Id}} -> Id; _ -> 0 end,
 200    {value, {_, Message_count}} = lists:keysearch("message_count", 1, Data),
 201    Main_page = case lists:keysearch("main_page", 1, Data) of {value, {_, P}} -> P; _ -> 1 end,
 202    Troll_id = case lists:keysearch("troll_id", 1, Data) of {value, {_, T}} -> T; _ -> 0 end,
 203    {value, {_, {array, Conversations_json}}} = lists:keysearch("conversations", 1, Data),
 204
 205    Racines_conversations = lists:map(
 206       fun({struct, [{"root", Racine}, {"page", Page} | Reste]}) ->
 207          Last_mess_conv  = case Reste of [{"last_message_id", L}] -> L; _ -> 0 end,
 208          {Racine, Page, Last_mess_conv}
 209       end,
 210       Conversations_json
 211    ),
 212    User = case euphorik_bd:user_by_cookie(Cookie) of
 213       {ok, U} -> U;
 214       _ -> inconnu
 215    end,
 216
 217    case {mnesia:subscribe({table, minichat, detailed}), mnesia:subscribe({table, troll, detailed})} of
 218       {{error, E}, _} -> E;
 219       {_, {error, E}} -> E;
 220       _ ->
 221          % attente d'événements
 222          R = wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id),
 223          mnesia:unsubscribe({table, minichat, detailed}),
 224          mnesia:unsubscribe({table, troll, detailed}),
 225          R
 226    end;
 227 % Attend un événement pour la page "Admin"
 228 wait_event([{"page", "admin"}, {"last_troll", Last_troll}]) ->
 229    case wait_event_page_admin(Last_troll) of
 230       banned_ips_refresh ->
 231          {struct,
 232             [
 233                {"reply", "banned_ips_refresh"}
 234             ]
 235          };
 236       {mod, Troll} ->
 237          {struct,
 238             [
 239                {"reply", "troll_modified"},
 240                {"troll_id", Troll#troll.id},
 241                {"content", Troll#troll.content}
 242             ]
 243          };
 244       {add, Trolls} ->
 245          {struct,
 246             [
 247                {"reply", "troll_added"},
 248                {"trolls", {array,
 249                   lists:map(
 250                      fun(T) ->
 251                         {ok, #user{profile = Profile} = User} = euphorik_bd:user_by_id(T#troll.id_user),
 252                         {struct,
 253                            [
 254                               {"troll_id", T#troll.id},
 255                               {"content", T#troll.content},
 256                               {"author", Profile#profile.pseudo},
 257                               {"author_id", User#user.id}
 258                            ]
 259                         }
 260                      end,
 261                      Trolls
 262                   )
 263                }}
 264             ]
 265          };
 266       {del, Troll_id} ->
 267          {struct,
 268             [
 269                {"reply", "troll_deleted"},
 270                {"troll_id", Troll_id}
 271             ]
 272          };
 273       _ ->
 274          erreur(60)
 275    end;
 276 wait_event(_) ->
 277    erreur(70).
 278
 279
 280 % Attend un événement pour la page "Chat" et renvoie soit un troll soit les messages manquants au client.
 281 wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id) ->
 282    % est-ce que le troll est à jour ?
 283    case euphorik_bd:current_troll() of
 284       Current when is_record(Current, troll), Current#troll.id =/= Troll_id ->
 285          {struct, [
 286             {"reply", "new_troll"},
 287             {"troll_id", Current#troll.id},
 288             {"message_id", Current#troll.id_minichat},
 289             {"content", Current#troll.content}
 290          ]};
 291       _ ->
 292          % est-ce qu'il y a des nouveaux messages ?
 293          case euphorik_minichat_conversation:conversations(Racines_conversations, Message_count, Last_message_id, Main_page) of
 294             vide ->
 295                wait_event_bd_page_chat(),
 296                wait_event_page_chat(User, Racines_conversations, Message_count, Last_message_id, Main_page, Troll_id);
 297             Conversations ->
 298                % accrochez-vous ca va siouxer ;)
 299                {struct, [
 300                   {"reply", "new_messages"},
 301                   {"conversations", {array,
 302                      lists:map(
 303                         fun({Racine, {Conv, Plus}}) ->
 304                            {struct, [
 305                               {"last_page", not Plus},
 306                               {"first", % le premier message de la conversation
 307                                  if Racine =:= undefined orelse Conv =:= [] ->
 308                                        null;
 309                                     true ->
 310                                        {Racine_id, _, _} = Racine,
 311                                        case euphorik_bd:message_by_id(Racine_id) of
 312                                           {ok, Mess} ->
 313                                              json_message(Mess, euphorik_bd:parents_id(Racine_id), User);
 314                                           _ ->
 315                                              null
 316                                        end
 317                                  end
 318                               },
 319                               {messages, {array,
 320                                  lists:map(
 321                                     fun({Mess, Repond_a}) ->
 322                                        json_message(Mess, Repond_a, User)
 323                                     end,
 324                                     Conv
 325                                  )
 326                               }}
 327                            ]}
 328                         end,
 329                         % on ajoute un 'undefined' correspondant à la premier conversation qui ne possède pas de racine
 330                         % TODO : peut être à revoir car un peu lourd est compliqué
 331                         aggregation_racines_conversations([undefined | Racines_conversations], Conversations)
 332                      )
 333                   }}
 334                ]}
 335          end
 336    end.
 337
 338
 339 aggregation_racines_conversations(L1, L2) ->
 340    aggregation_racines_conversations(L1, L2, []).
 341 aggregation_racines_conversations([], [], L) -> lists:reverse(L);
 342 aggregation_racines_conversations([E1|R1], [E2|R2], L) ->
 343    aggregation_racines_conversations(R1, R2, [{E1, E2} | L]).
 344
 345
 346
 347 % Attend un événement lié à la page 'chat'.
 348 wait_event_bd_page_chat() ->
 349    receive % attente d'un post
 350       {mnesia_table_event, {write, minichat, _Message, [], _}} ->
 351          ok;
 352       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}} when Troll#troll.date_post =/= undefined, Old_troll#troll.date_post == undefined ->
 353          ok;
 354       {tcp_closed, _} ->
 355          exit(normal);
 356       _ ->
 357          wait_event_bd_page_chat()
 358    % 60 minutes de timeout (on ne sais jamais)
 359    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 360    after 1000 * 60 * 60 ->
 361       timeout
 362    end.
 363
 364
 365 % Attent un événement concernant la page admin
 366 % Renvoie les trolls manquants posté après Last_id ou banned_ips_refresh.
 367 % Si pas de trolls alors attend un événement tel qu'un ajout, une modification ou une suppression.
 368 % renvoie :
 369 %  {mod, Troll}
 370 % ou {add, [Trolls]}
 371 % ou {del, Troll_id}
 372 % ou banned_ips_refresh
 373 % ou timeout
 374 wait_event_page_admin(Last_id) ->
 375    case {mnesia:subscribe({table, troll, detailed}), mnesia:subscribe({table, ip_table, detailed})} of
 376       {{error, E}, _ } -> E;
 377       {_, {error, E}} -> E;
 378       _ ->
 379          R = case euphorik_bd:trolls(Last_id) of
 380                [] -> % pas de trolls
 381                   wait_event_page_admin();
 382                Trolls ->
 383                   {add, Trolls}
 384          end,
 385          mnesia:unsubscribe({table, troll, detailed}),
 386          mnesia:unsubscribe({table, ip_table, detailed}),
 387          R
 388    end.
 389
 390 wait_event_page_admin() ->
 391    % s'il n'y a pas de trolls que l'utilisateur n'a pas connaissance alors on attend un événement
 392    receive
 393       % cas où un troll est choisit comme courant
 394       {mnesia_table_event, {write, troll, Troll, [Old_troll | _], _}}
 395          when Old_troll#troll.date_post =:= undefined, Troll#troll.date_post =/= undefined ->
 396          {del, Troll#troll.id};
 397       {mnesia_table_event, {write, troll, Troll, [_Old_troll | _], _}} ->
 398          {mod, Troll};
 399       {mnesia_table_event, {write, troll, Troll, [], _}} ->
 400          {add, [Troll]};
 401       {mnesia_table_event, {delete, troll, {troll, Id}, _, _}} ->
 402          {del, Id};
 403       {mnesia_table_event, {write, ip_table, IP, [Old_IP | _], _}}
 404          when Old_IP#ip_table.ban =/= IP#ip_table.ban; Old_IP#ip_table.ban_duration =/= IP#ip_table.ban_duration ->
 405          banned_ips_refresh;
 406       {tcp_closed, _} ->
 407          exit(normal);
 408       _ ->
 409          wait_event_page_admin()
 410    % 60 minutes de timeout (on ne sais jamais)
 411    % Après 60 minutes de connexion, le client doit donc reétablir une connexion
 412    after 1000 * 60 * 60 ->
 413       timeout
 414    end.
 415
 416
 417 % Un utilisateur envoie un message
 418 % Answer_to est une liste d'id (int)
 419 put_message(
 420    [
 421       {"cookie", Cookie},
 422       {"nick", Nick},
 423       {"content", Content},
 424       {"answer_to", {array, Answer_to}}
 425    ]
 426 ) ->
 427    case euphorik_bd:user_by_cookie(Cookie) of
 428       {ok, User} ->
 429          case euphorik_bd:est_banni(User#user.id) of
 430             {true, Temps_restant} ->
 431                erreur(80, [format_minutes(Temps_restant)]);
 432             _ ->
 433                Strip_content = string:strip(Content),
 434                if Strip_content =:= [] ->
 435                      erreur(90);
 436                   true ->
 437                      % attention : non-atomique (update_pseudo+nouveau_message)
 438                      euphorik_bd:update_pseudo_user(User#user.id, Nick),
 439                      case euphorik_bd:nouveau_message(Strip_content, User#user.id, Answer_to) of
 440                         {erreur, R} -> erreur(100, [R]);
 441                         _ ->
 442                            json_reponse_ok()
 443                      end
 444                end
 445          end;
 446    _ ->
 447       erreur(110)
 448    end.
 449
 450
 451 % bannissement d'un utilisateur (son ip est bannie)
 452 ban(
 453    [
 454       {"cookie", Cookie},
 455       {"duration", Duration},
 456       {"user_id", User_id},
 457       {"reason", Reason}
 458    ]) ->
 459       % controle que l'utilisateur est un admin
 460       case euphorik_bd:user_by_cookie(Cookie) of
 461          {ok, User1 = #user{ek_master = true}} ->
 462             case euphorik_bd:user_by_id(User_id) of
 463                {ok, User1} ->
 464                   erreur(120);
 465                {ok, #user{ek_master = false, profile = Profile2} = User2} ->
 466                   euphorik_bd:ban(User2#user.last_ip, Duration),
 467                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("\"~s~s\" est ~s pour ~s.~s",
 468                      [
 469                         Profile2#profile.pseudo,
 470                         if User2#user.login =:= [] -> ""; true -> " (" ++ User2#user.login ++ ")" end,
 471                         if Duration =< 15 -> "kické"; true -> "banni" end,
 472                         format_minutes(Duration),
 473                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 474                      ]
 475                   ))),
 476                   json_reponse_ok();
 477                {ok, _} ->
 478                   erreur(130);
 479                _ ->
 480                   erreur(140)
 481             end;
 482          _ ->
 483             erreur(150)
 484       end.
 485
 486
 487 % slapage d'un user (avertissement)
 488 slap(
 489    [
 490       {"cookie", Cookie},
 491       {"user_id", User_id},
 492       {"reason", Reason}
 493    ]) ->
 494       % controle que l'utilisateur est un admin
 495       case euphorik_bd:user_by_cookie(Cookie) of
 496          {ok, User1 = #user{ek_master = true, profile = Profile1}} ->
 497             case euphorik_bd:user_by_id(User_id) of
 498                {ok, User1} ->
 499                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s s'auto slap~s.",
 500                      [
 501                         Profile1#profile.pseudo,
 502                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end
 503                      ]
 504                   ))),
 505                   json_reponse_ok();
 506                {ok, #user{ek_master = false, profile = Profile2}} ->
 507                   euphorik_bd:nouveau_message_sys(lists:flatten(io_lib:format("~s se fait slaper par ~s.~s",
 508                      [
 509                         Profile2#profile.pseudo,
 510                         Profile1#profile.pseudo,
 511                         if Reason =/= [] -> " - Raison: " ++ Reason; true -> "" end ++ "."
 512                      ]
 513                   ))),
 514                   json_reponse_ok();
 515                {ok, _} ->
 516                   erreur(130);
 517                _ ->
 518                   erreur(160)
 519             end;
 520          _ ->
 521             erreur(170)
 522       end.
 523
 524
 525 put_troll(
 526    [
 527       {"cookie", Cookie},
 528       {"content", Content}
 529    ]
 530 ) ->
 531    % controle que l'utilisateur est un admin
 532    case euphorik_bd:user_by_cookie(Cookie) of
 533       {ok, User = #user{ek_master = true}} ->
 534          case euphorik_bd:put_troll(User#user.id, Content) of
 535             max_troll_reached_per_user ->
 536                erreur(180, [?NB_MAX_TROLL_WAITING_BY_USER]);
 537             max_troll_reached ->
 538                erreur(190, [?NB_MAX_TROLL_WAITING]);
 539             _Id ->
 540                json_reponse_ok()
 541          end;
 542       _ ->
 543          erreur(200)
 544    end.
 545
 546
 547 mod_troll(
 548    [
 549       {"cookie", Cookie},
 550       {"troll_id", Troll_id},
 551       {"content", Content}
 552    ]
 553 ) ->
 554    % controle que l'utilisateur est un admin
 555    case euphorik_bd:user_by_cookie(Cookie) of
 556       {ok, User = #user{ek_master = true}} ->
 557          User_id = User#user.id,
 558          case euphorik_bd:troll_by_id(Troll_id) of
 559             {ok, #troll{id_user = User_id}} ->
 560                euphorik_bd:mod_troll(Troll_id, Content),
 561                json_reponse_ok();
 562             _ ->
 563                erreur(210)
 564          end;
 565       _ ->
 566          erreur(220)
 567       end.
 568
 569
 570 del_troll(
 571    [
 572       {"cookie", Cookie},
 573       {"troll_id", Troll_id}
 574    ]
 575 ) ->
 576    % controle que l'utilisateur est un admin
 577    case euphorik_bd:user_by_cookie(Cookie) of
 578       {ok, User = #user{ek_master = true}} ->
 579          User_id = User#user.id,
 580          case euphorik_bd:troll_by_id(Troll_id) of
 581             {ok, #troll{id_user = User_id}} ->
 582                euphorik_bd:del_troll(Troll_id),
 583                json_reponse_ok();
 584             _ ->
 585                erreur(210)
 586          end;
 587       _ ->
 588          erreur(220)
 589    end.
 590
 591
 592 unban_ip(
 593    [
 594       {"cookie", Cookie},
 595       {"ip", IP}
 596    ]
 597 ) ->
 598    case euphorik_bd:user_by_cookie(Cookie) of
 599       {ok, #user{ek_master = true}} ->
 600          euphorik_bd:deban(euphorik_common:unserialize_ip(IP)),
 601          json_reponse_ok();
 602       _ ->
 603          erreur(230)
 604    end.
 605
 606
 607 list_banned_ips(
 608    [
 609       {"cookie", Cookie}
 610    ]
 611 ) ->
 612    case euphorik_bd:user_by_cookie(Cookie) of
 613       {ok, #user{ek_master = true}} ->
 614          {
 615             struct,
 616             [
 617                {"reply", "list_banned_ips"},
 618                {"list", {array, lists:map(
 619                   fun({IP, T, Users}) ->
 620                      {struct,
 621                         [
 622                            {"ip", euphorik_common:serialize_ip(IP)},
 623                            {"remaining_time", format_minutes(T)},
 624                            {"users", {array, lists:map(
 625                               fun({Pseudo, Login}) ->
 626                                  {struct,
 627                                     [
 628                                        {"nick", Pseudo},
 629                                        {"login", Login}
 630                                     ]
 631                                  }
 632                               end,
 633                               Users
 634                            )}}
 635                         ]
 636                      }
 637                   end,
 638                   euphorik_bd:list_ban()
 639                )}}
 640             ]
 641          };
 642       _ ->
 643          erreur(230)
 644    end.
 645
 646
 647 % Construit une erreur
 648 erreur(Num, Args) ->
 649    erreur_json(Num, lists:flatten(io_lib:format(euphorik_bd:get_texte(Num), Args))).
 650
 651
 652 erreur(Num) ->
 653    erreur_json(Num, euphorik_bd:get_texte(Num)).
 654
 655
 656 erreur_json(Num, Mess) ->
 657    {
 658       struct, [
 659          {"reply", "error"},
 660          {"no", Num},
 661          {"error_message", Mess}
 662       ]
 663    }.
 664
 665
 666 % Formatage de minutes.
 667 % par exemple : "1min", "45min", "1h23min", "1jour 2h34min"
 668 format_minutes(Min) ->
 669    Jours = Min div (60 * 24),
 670    Heures = Min rem (60 * 24) div 60,
 671    Minutes = Min rem (60),
 672    if Jours =/= 0 -> integer_to_list(Jours) ++ " Jour" ++ if Jours > 1 -> "s"; true -> "" end ++ " "; true -> "" end ++
 673    if Heures =/= 0 -> integer_to_list(Heures) ++ " heure"  ++ if Heures > 1 -> "s"; true -> "" end; true -> "" end ++
 674    if Minutes == 0 ->
 675          "";
 676       true ->
 677          " " ++ integer_to_list(Minutes) ++ " minute"  ++ if Minutes > 1 -> "s"; true -> "" end
 678    end.
 679
 680
 681 % Formatage d'une heure
 682 % local_time() -> string
 683 format_date(Date) ->
 684    DateLocal = calendar:now_to_local_time(Date),
 685    DateNowLocal = calendar:local_time(),
 686    {{Annee, Mois, Jour}, {Heure, Minute, Seconde}} = DateLocal,
 687    {{AnneeNow, _, _}, {_, _, _}} = DateNowLocal,
 688    Hier = calendar:date_to_gregorian_days(element(1, DateLocal)) =:=  calendar:date_to_gregorian_days(element(1, DateNowLocal)) - 1,
 689    lists:flatten(
 690       if element(1, DateLocal) =:= element(1, DateNowLocal) ->
 691          "";
 692          Hier ->
 693             "Hier ";
 694          Annee =:= AnneeNow ->
 695             io_lib:format("~2.10.0B/~2.10.0B ", [Jour, Mois]);
 696          true ->
 697             io_lib:format("~2.10.0B/~2.10.0B/~B ", [Jour, Mois, Annee])
 698       end ++
 699       io_lib:format("~2.10.0B:~2.10.0B:~2.10.0B", [Heure, Minute, Seconde])
 700    ).
 701
 702
 703 json_reponse_ok() ->
 704    {struct, [{"reply", "ok"}]}.
 705
 706
 707 json_reponse_login_ok(#user{profile = Profile} = User) ->
 708    {
 709       struct, [
 710          {"reply", "login"},
 711          {"status", if (User#user.password =/= []) and (User#user.login =/= []) -> "auth_registered"; true -> "auth_not_registered" end},
 712          {"cookie", User#user.cookie},
 713          {"id", User#user.id},
 714          {"login", User#user.login},
 715          {"ek_master", User#user.ek_master},
 716          {"profile", {struct,
 717             [
 718                {"nick", Profile#profile.pseudo},
 719                {"email", Profile#profile.email},
 720                {"css", Profile#profile.css},
 721                {"chat_order", atom_to_list(Profile#profile.chat_order)},
 722                {"nick_format", atom_to_list(Profile#profile.nick_format)},
 723                {"view_times", Profile#profile.view_times},
 724                {"view_tooltips", Profile#profile.view_tooltips},
 725                {"conversations", {array, lists:map(
 726                   fun({Racine, Reduit}) ->
 727                      {struct, [{"root", Racine}, {"minimized", Reduit}]}
 728                   end,
 729                   Profile#profile.conversations
 730                )}},
 731                {"ostentatious_master", atom_to_list(Profile#profile.ostentatious_master)}
 732             ]
 733          }}
 734       ]
 735    }.
 736
 737 % Renvoie le message formaté en JSON.
 738 % Mess est de type #minichat
 739 % Repond_a est une liste d'id des messages auquel répond Mess
 740 % User est l'utilisateur courant de type #user
 741 json_message(Mess, Repond_a, User) ->
 742    Est_proprietaire = User =/= inconnu andalso User#user.id =:= Mess#minichat.auteur_id,
 743    A_repondu_a_message = User =/= inconnu andalso euphorik_bd:a_repondu_a_message(User#user.id, Mess#minichat.id),
 744    Est_une_reponse_a_user = User =/= inconnu andalso euphorik_bd:est_une_reponse_a_user(User#user.id, Mess#minichat.id),
 745    {ok,  #user{profile = Profile_mess} = User_mess } = euphorik_bd:user_by_id(Mess#minichat.auteur_id),
 746    {struct, [
 747       {"id", Mess#minichat.id},
 748       {"user_id", User_mess#user.id},
 749       {"date", case Mess#minichat.date of undefined -> "?"; _ -> format_date(Mess#minichat.date) end},
 750       {"system", Mess#minichat.auteur_id =:= 0},
 751       {"owner", Est_proprietaire},
 752       {"answered", A_repondu_a_message},
 753       {"is_a_reply", Est_une_reponse_a_user},
 754       {"nick", Mess#minichat.pseudo},
 755       {"login", User_mess#user.login},
 756       {"content", Mess#minichat.contenu},
 757       {"root", Mess#minichat.racine_id},
 758       {"answer_to", {array, lists:map(
 759          fun(Id_mess) ->
 760             {ok, M} = euphorik_bd:message_by_id(Id_mess),
 761             {ok, User_reponse} = euphorik_bd:user_by_mess(M#minichat.id),
 762             {struct, [{"id", M#minichat.id}, {"nick", M#minichat.pseudo}, {"login", User_reponse#user.login}]}
 763          end,
 764          Repond_a
 765       )}},
 766       {"ek_master", User_mess#user.ek_master},
 767       {"ostentatious_master", atom_to_list(Profile_mess#profile.ostentatious_master)}
 768    ]}.