safechat/html/messagetable.php

<?php
/*! @file

    @id $Id$

    @see @ref messagetable for the database schema

    @page database Database

    @section messagetable Message Table

    <table>
    <caption>Table: message</caption>
    <tr><th>Colum Name</th><th>SQL Type</th><th>Description</th></tr>
    <tr><td>id</td><td>int, primary key</td><td>Incrementing message id starting at 1.</td></tr>
    <tr><td>time</td><td>timestamp</td><td>Time when message has been stored in the database.</td></tr>
    <tr><td>user</td><td>varchar(50), references \ref usertable "user (name)"</td><td>The sender's user name (pseudonym).</td></tr>
    <tr><td>msg</td><td>longtext</td><td>The encryped and armored message text.</td></tr>
    </table>
*/
//       1         2         3         4         5         6         7         8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890

require_once("opendb.php");
try {
  $query = <<<EOD
    create table if not exists
      message (
        id
          int primary key not null auto_increment
          comment "id of the message, it is used in the client to check if a message has already been downloaded or not",
        time
          timestamp default current_timestamp
          comment "time when the message has been stored on the server",
        user
          varchar(50) not null
          comment "name of the user that sent the message",
        msg
          longtext not null
          comment "message content, must be armored gnupg encrypted format",
        foreign key (user)
          references user(name)
          on delete cascade
          on update cascade
      ) character set utf8 engine=innodb
        comment="table to hold all messages for later download by the receiver";
EOD;
  $db->query($query);
  $db->query('set global max_allowed_packet=1000000000');
  $db->query('set global net_buffer_length=1000000');
} catch (Exception $e) {
  error('database error on server');
}
?>