euphorik_bd.erl

   1 % Module de création de la base de données euphorik.
   2 % @author G.Burri
   3
   4 -module(euphorik_bd).
   5 -export([
   6    create/0,
   7    create_tables/0,
   8    vers_version/1,
   9    peupler/0
  10    ]).
  11
  12 -include("../include/euphorik_bd.hrl").
  13
  14
  15 % Instructions pour créer une nouvelle base :
  16 % $erl -sname yaws -mnesia dir '"/projets/euphorik/BD"'
  17 % voir doc/installation.txt
  18 % >l(euphorik_bd).
  19 % >euphorik_bd:create().
  20 create() ->
  21    mnesia:stop(),
  22    mnesia:delete_schema([node()]),
  23    mnesia:create_schema([node()]), % nécessaire pour les tables sur disc
  24    mnesia:start(),
  25    create_tables().
  26
  27
  28 create_tables() ->
  29    mnesia:create_table(counter, [
  30       {attributes, record_info(fields, counter)},
  31       {disc_copies, [node()]}
  32    ]),
  33    mnesia:create_table(minichat, [
  34       {attributes, record_info(fields, minichat)},
  35       {index, [auteur_id]},
  36       {disc_copies, [node()]}
  37    ]),
  38    mnesia:create_table(reponse_minichat, [
  39       {type, bag},
  40       {attributes, record_info(fields, reponse_minichat)},
  41       {index, [cible]},
  42       {disc_copies, [node()]}
  43    ]),
  44    mnesia:create_table(user, [
  45       {attributes, record_info(fields, user)},
  46       {index, [cookie, login]},
  47       {disc_copies, [node()]}
  48    ]).
  49
  50
  51 vers_version(2) ->
  52    mnesia:transform_table(
  53       user,
  54       fun({user, Id, Cookie, Pseudo, Date_creation, Date_derniere_connexion, Css}) ->
  55             {user, Id, Cookie, Pseudo, "", "", "", Date_creation, Date_derniere_connexion, Css}
  56       end,
  57       record_info(fields, user),
  58       user
  59    );
  60 vers_version(3) ->
  61    mnesia:transform_table(
  62       user,
  63       fun({user, Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css}) ->
  64             {user,  Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, 0}
  65       end,
  66       record_info(fields, user),
  67       user
  68    );
  69 vers_version(4) ->
  70    mnesia:transform_table(
  71       user,
  72       fun({user, Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, Indice_flood}) ->
  73             {user,  Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, Indice_flood, []}
  74       end,
  75       record_info(fields, user),
  76       user
  77    );
  78 % Ajout du numéro de page de la conv principale
  79 vers_version(5) ->
  80    mnesia:transform_table(
  81       user,
  82       fun({user, Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, Indice_flood, Conversations}) ->
  83             {user,  Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, Indice_flood, 1, Conversations}
  84       end,
  85       record_info(fields, user),
  86       user
  87    );
  88 % Ajout le format d'affichage des pseudos
  89 vers_version(6) ->
  90    mnesia:transform_table(
  91       user,
  92       fun({user, Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, Indice_flood, Page_Principale, Conversations}) ->
  93             {user,  Id, Cookie, Pseudo, Login, Password, Email, Date_creation, Date_derniere_connexion, Css, nick, Indice_flood, Page_Principale, Conversations}
  94       end,
  95       record_info(fields, user),
  96       user
  97    ).
  98
  99
 100 % exemple de peuplage de la BD, utilisé pour les tests
 101 peupler() ->
 102    mnesia:transaction(
 103       fun() ->
 104          mnesia:write({minichat, now(), "Pierre", "Salut tout le monde"}),
 105          mnesia:write({minichat, now(), "Paul", "Salut à toi !"})
 106       end
 107    ).