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