<?php

  class data_users extends data
  {

    # ----------------------------------------------------------------------------------------
    #                                                                                    users
    #

    function users($start = 0, $is_artiste = null, $alpha = null)
    { $users = array("list" => array(), "total" => 0);
      try
      { $SELECT =
         "SELECT #--pun_users.id"
        .", #--pun_users.username"
        .", #--artistes.id as id_artiste";
        $FROM =
         " FROM #--pun_users"
        ." LEFT JOIN #--artistes"
        ." ON #--pun_users.id=#--artistes.pun_user";
        $WHERE = " WHERE #--pun_users.id!=1";
        $WHERE .= (isset($alpha) ? ($WHERE ? " AND" : " WHERE")." LEFT(username, 1)=".$this->eq($alpha) : "");
        $WHERE .= (isset($is_artiste) ? ($WHERE ? " AND" : " WHERE")." #--artistes.id IS".($is_artiste ? " NOT" : "")." NULL" : "");
        $GROUP_BY = " GROUP BY #--pun_users.id";
        $LIMIT = ($this->env->config("max_list") ? " LIMIT ".$this->env->config("max_list")." OFFSET ".$start : "");
        $sql = "SELECT count(*) as n FROM(".$SELECT.$FROM.$WHERE.$GROUP_BY.") res";
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $users["total"] = $v_rst["n"];
        $this->sql->free_result($rst);
        if($users["total"] > 0)
        { $sql = "SELECT * FROM(".$SELECT.$FROM.$WHERE.$GROUP_BY.$LIMIT.") res";
          $rst = $this->sql->query($sql);
          while($v_rst = $this->sql->fetch_assoc($rst)) $users["list"][$v_rst["id"]] = $v_rst;
          $this->sql->free_result($rst);
        }
      }
      catch(Exception $_e) { $users = false; }
      return $users;
    }

    function user($id)
    { $user = array();
      try
      { $sql = "SELECT * from #--pun_users WHERE id=".$id;
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $user = $v_rst;
        $this->sql->free_result($rst);
      }
      catch(Exception $_e) { $user = false; }
      return $user;
    }

    # ----------------------------------------------------------------------------------------
    #                                                                                    admin
    #

    function is_admin($user_id)
    { $OK = false;
      try
      { $sql = "SELECT group_id FROM #--pun_users WHERE id=".$user_id;
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $OK = $v_rst["group_id"] == 1;
        $this->sql->free_result($rst);
      }
      catch(Exception $_e) { $OK = false; }
      return $OK;
    }

    function is_super_admin($user_id)
    { $is_super_admin = false;
      try
      { $sql = "SELECT * FROM #--super_admins WHERE id_pun_user=".$user_id;
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $is_super_admin = true;
        $this->sql->free_result($rst);
      }
      catch(Exception $_e) { $is_super_admin = false; }
      return $is_super_admin;
    }

    function is_artiste_admin($id_artise, $pun_user)
    { $is_artiste_admin = false;
      try
      { $sql = "SELECT count(*) as n FROM #--artistes_admins WHERE id_artiste=".$id_artise." AND pun_user=".$pun_user;
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $is_artiste_admin = $v_rst["n"] > 0;
        $this->sql->free_result($rst);
      }
      catch(Exception $_e) { $is_artiste_admin = false; }
      return $is_artiste_admin;
    }

    # ----------------------------------------------------------------------------------------
    #                                                                             log in / out
    #

    function pun_login_ok($form_username, $form_password, $db)
    { $username_sql = ($db_type == 'mysql' || $db_type == 'mysqli') ?
       'username=\''.$db->escape($form_username).'\''
      :'LOWER(username)=LOWER(\''.$db->escape($form_username).'\')';
      $_sql = 
       'SELECT id, group_id, password'
      .' FROM '.$db->prefix.'users'
      .' WHERE '.$username_sql;
      $result = $db->query
      ( $_sql
      ) or error('Impossible de retrouver les informations utilisateur', __FILE__, __LINE__, $db->error());
      list($user_id, $group_id, $db_password_hash) = $db->fetch_row($result);
      $save_pass = 1;
      $authorized = false;
      if(!empty($db_password_hash))
      { $sha1_in_db = (strlen($db_password_hash) == 40) ? true : false;
        $sha1_available = (function_exists('sha1') || function_exists('mhash')) ? true : false;
        $form_password_hash = pun_hash($form_password); // This could result in either an SHA-1 or an MD5 hash (depends on $sha1_available)
        if($sha1_in_db && $sha1_available && $db_password_hash == $form_password_hash) $authorized = true;
        else if(!$sha1_in_db && $db_password_hash == md5($form_password))
        { $authorized = true;
          if($sha1_available) // There's an MD5 hash in the database, but SHA1 hashing is available, so we update the DB
          $db->query
          ( 'UPDATE '.$db->prefix.'users'
           .' SET password=\''.$form_password_hash.'\''
           .' WHERE id='.$user_id
          ) or error('Impossible de modifier le mot de passe', __FILE__, __LINE__, $db->error());
        }
      }
      // Update the status if this is the first time the user logged in
      if($group_id == PUN_UNVERIFIED) $db->query
      ( 'UPDATE '.$db->prefix.'users'
       .' SET group_id='.$pun_config['o_default_user_group']
       .' WHERE id='.$user_id
      ) or error('Uimpossible de modifier le statut utilisateur', __FILE__, __LINE__, $db->error());
      // Remove this users guest entry from the online list
      $db->query
      ( 'DELETE FROM '.$db->prefix.'online'
       .' WHERE ident=\''.$db->escape(get_remote_address()).'\''
      ) or error('Impossible de supprimer de la liste des utilisateur en ligne', __FILE__, __LINE__, $db->error());
      $expire = ($save_pass == '1') ? time() + 31536000 : 0;
      pun_setcookie($user_id, $form_password_hash, $expire);
      return $authorized;
    }

    function pun_logout($pun_user, $db)
    { if($pun_user["is_guest"] || !isset($_GET["id"]) || $_GET["id"] != $pun_user["id"]) return false;
      // Remove user from "users online" list.
      $db->query
      ( 'DELETE FROM '.$db->prefix.'online'
       .' WHERE user_id='.$pun_user['id']
      ) or error('Impossible de supprimer de la liste des utilisateur en ligne', __FILE__, __LINE__, $db->error());
      // Update last_visit (make sure there's something to update it with)
      if(isset($pun_user['logged'])) $db->query
      ( 'UPDATE '.$db->prefix.'users'
       .' SET last_visit='.$pun_user['logged']
       .' WHERE id='.$pun_user['id']
      ) or error('Impossible de modifier les données de visite de l\'utilisateur', __FILE__, __LINE__, $db->error());
      pun_setcookie(1, random_pass(8), time() + 31536000);
      return true;
    }

  }

?>