// check_consult
// checks if a user id is registered as having already
// visited his profile.php page.
// @uid        : the user id
// @user_idsOK : (returned) array of all users ids having already visited
//               their profile.php pages
//
// @returns    : true or false whether the users has already visited his
//               profile.php page or not
function check_consult($uid, &$user_idsOK) {
  $t = array(); $v = false;
  if ($v = (
    ($t = mysql_fetch_row(pwg_query("
      SELECT `value`
      FROM `".CONFIG_TABLE."`
      WHERE `param` = 'redir_profile';
    "))) !== false)
  ) {
    $user_idsOK = explode(',', $t[0]);
    $v = (in_array($uid, $user_idsOK));
  }
  return $v;
}

// RedirectToProfile
// redirects a visitor (not generic (forbidden) neither admin) to his
// profile.php page
//
// no variable, no return
add_event_handler('login_success', 'RedirectToProfile');

function RedirectToProfile() {
  global $user;
  
  if (!is_generic() and !is_admin()) {
    $user_idsOK = array();
    if (!check_consult($user['id'], $user_idsOK))
     redirect(PHPWG_ROOT_PATH.'profile.php');
  }
}

// RegisterProfileConsult
// registers a user id when a visitor visits his profile.php page.
// Checks if the value "redir_profile" of table <pwg>_config exists or not,
// and creates it if needed.
//
// no variable, no return
add_event_handler('loc_begin_profile', 'RegisterProfileConsult');

function RegisterProfileConsult() {
  global $user, $template, $errors;
  
  $user_idsOK = array();
  if (!check_consult($user['id'], $user_idsOK)) {
    $user_idsOK[] = $user['id'];
    if (!mysql_fetch_row(pwg_query("
      SELECT `value`
      FROM `".CONFIG_TABLE."`
      WHERE `param` = 'redir_profile';
    "))) {
      $v = (pwg_query("
        INSERT INTO `".CONFIG_TABLE."` (`param`,`value`,`comment`)
        VALUES ('redir_profile', \"".implode(',', $user_idsOK)."\" ,'Ids of users having checked their profile page at least once');
      ") === false);
    }
    else {
      $v = (pwg_query("
        UPDATE `".CONFIG_TABLE."`
        SET `value` = \"".implode(',', $user_idsOK)."\"
        WHERE `param` = 'redir_profile';
      ") === false);
    }
    if ($v) {
      $errors[]='Unable to register user id '.$user['id'].' in redir_profile';
      $template->assign('errors', $errors);
    }
  }
}