optional cookie identification

git-svn-id: http://piwigo.org/svn/trunk@45 68402e56-0260-453c-a942-63ccdbb3a9ee

9 files changed, 170 insertions, 44 deletions

diff --git a/admin/configuration.php b/admin/configuration.php
index 529a3541b..71802db1f 100644
--- a/admin/configuration.php
+++ b/admin/configuration.php
@@ -41,7 +41,7 @@ array( 'prefix_thumbnail','webmaster','mail_webmaster','access',
        'show_comments','nb_comment_page','upload_available',
        'upload_maxfilesize', 'upload_maxwidth','upload_maxheight',
        'upload_maxwidth_thumbnail','upload_maxheight_thumbnail','log',
-       'comments_validation','comments_forall' );
+       'comments_validation','comments_forall','authorize_cookies' );
 $default_user_infos =
 array( 'nb_image_line','nb_line_page','language','maxwidth',
        'maxheight','expand','show_nb_comments','short_period','long_period',
@@ -851,6 +851,37 @@ $vtp->addSession( $sub, 'line' );
 $vtp->addSession( $sub, 'space_line' );
 $vtp->closeSession( $sub, 'space_line' );
 $vtp->closeSession( $sub, 'line' );
+// authorize cookies ?
+$vtp->addSession( $sub, 'line' );
+$vtp->addSession( $sub, 'param_line' );
+$vtp->setVar( $sub, 'param_line.name', $lang['conf_session_cookie'] );
+$vtp->addSession( $sub, 'group' );
+$vtp->addSession( $sub, 'radio' );
+$vtp->setVar( $sub, 'radio.name', 'authorize_cookies' );
+$vtp->setVar( $sub, 'radio.value', 'true' );
+$checked = '';
+if ( $authorize_cookies == 'true' )
+{
+  $checked = ' checked="checked"';
+}
+$vtp->setVar( $sub, 'radio.checked', $checked );
+$vtp->setVar( $sub, 'radio.option', $lang['yes'] );
+$vtp->closeSession( $sub, 'radio' );
+$vtp->addSession( $sub, 'radio' );
+$vtp->setVar( $sub, 'radio.name', 'authorize_cookies' );
+$vtp->setVar( $sub, 'radio.value', 'false' );
+$checked = '';
+if ( $authorize_cookies == 'false' )
+{
+  $checked = ' checked="checked"';
+}
+$vtp->setVar( $sub, 'radio.checked', $checked );
+$vtp->setVar( $sub, 'radio.option', $lang['no'] );
+$vtp->closeSession( $sub, 'radio' );
+$vtp->closeSession( $sub, 'group' );
+$vtp->setVar( $sub, 'param_line.def', $lang['conf_session_cookie_info'] );
+$vtp->closeSession( $sub, 'param_line' );
+$vtp->closeSession( $sub, 'line' );
 // session size
 $vtp->addSession( $sub, 'line' );
 $vtp->addSession( $sub, 'param_line' );
diff --git a/category.php b/category.php
index 5fe713adc..c6cfe1f42 100644
--- a/category.php
+++ b/category.php
@@ -20,6 +20,17 @@ $t2 = explode( '.', $t1[0] );
 $t2 = $t1[1].'.'.$t2[1];
 //----------------------------------------------------------- personnal include
 include_once( './include/init.inc.php' );
+//---------------------------------------------------------------------- logout
+if ( $_GET['act'] == 'logout' and isset( $_COOKIE['id'] ) )
+{
+  // cookie deletion if exists
+  setcookie( 'id', '', 0, cookie_path() );
+  $url = 'category.php';
+  header( 'Request-URI: '.$url );  
+  header( 'Content-Location: '.$url );  
+  header( 'Location: '.$url );
+  exit();
+}
 //-------------------------------------------------- access authorization check
 // creating the plain structure : array of all the available categories and
 // their relative informations, see the definition of the function
@@ -150,7 +161,7 @@ if ( !$user['is_the_guest'] )
 {
   // logout link
   $vtp->addSession( $handle, 'summary' );
-  $vtp->setVar( $handle, 'summary.url', './category.php?cat='.$page['cat'] );
+  $vtp->setVar( $handle, 'summary.url', './category.php?act=logout' );
   $vtp->setVar( $handle, 'summary.title', '' );
   $vtp->setVar( $handle, 'summary.name', replace_space( $lang['logout'] ) );
   $vtp->closeSession( $handle, 'summary' );
diff --git a/identification.php b/identification.php
index c88719d03..2c8901a05 100644
--- a/identification.php
+++ b/identification.php
@@ -18,10 +18,9 @@
 //----------------------------------------------------------- personnal include
 include_once( "./include/init.inc.php" );
 //-------------------------------------------------------------- identification
-$error = array();
+$errors = array();
 if ( isset( $_POST['login'] ) )
 {
-  $i = 0;
   // retrieving the encrypted password of the login submitted
   $query = 'select password';
   $query.= ' from '.PREFIX_TABLE.'users';
@@ -38,7 +37,7 @@ if ( isset( $_POST['login'] ) )
   }
   else
   {
-    $error[$i++] = $lang['invalid_pwd'];
+    array_push( $errors, $lang['invalid_pwd'] );
   }
 }
 //----------------------------------------------------- template initialization
@@ -63,10 +62,9 @@ initialize_template();
 if ( sizeof( $error ) != 0 )
 {
   $vtp->addSession( $handle, 'errors' );
-  for ( $i = 0; $i < sizeof( $error ); $i++ )
-  {
+  foreach ( $errors as $error ) {
     $vtp->addSession( $handle, 'li' );
-    $vtp->setVar( $handle, 'li.li', $error[$i] );
+    $vtp->setVar( $handle, 'li.li', $error );
     $vtp->closeSession( $handle, 'li' );
   }
   $vtp->closeSession( $handle, 'errors' );
diff --git a/include/config.inc.php b/include/config.inc.php
index 07b3bfb14..ae54d5616 100644
--- a/include/config.inc.php
+++ b/include/config.inc.php
@@ -62,7 +62,7 @@ $infos = array( 'prefix_thumbnail', 'webmaster', 'mail_webmaster', 'access',
                 'upload_available', 'upload_maxfilesize', 'upload_maxwidth',
                 'upload_maxheight', 'upload_maxwidth_thumbnail',
                 'upload_maxheight_thumbnail','log','comments_validation',
-                'comments_forall' );
+                'comments_forall','authorize_cookies' );
 
 $query  = 'SELECT ';
 foreach ( $infos as $i => $info ) {
diff --git a/include/functions_session.inc.php b/include/functions_session.inc.php
index 6109456cc..34032b572 100644
--- a/include/functions_session.inc.php
+++ b/include/functions_session.inc.php
@@ -14,17 +14,22 @@
  *   the Free Software Foundation;                                         *
  *                                                                         *
  ***************************************************************************/
+
+// The function generate_key creates a string with pseudo random characters.
+// the size of the string depends on the $conf['session_id_size'].
+// Characters used are a-z A-Z and numerical values. Examples :
+//                    "Er4Tgh6", "Rrp08P", "54gj"
+// input  : none (using global variable)
+// output : $key
 function generate_key()
 {
   global $conf;
+
   $md5 = md5( substr( microtime(), 2, 6 ).$conf['session_keyword'] );
   $init = '';
   for ( $i = 0; $i < strlen( $md5 ); $i++ )
   {
-    if ( is_numeric( $md5[$i] ) )
-    {
-      $init.= $md5[$i];
-    }
+    if ( is_numeric( $md5[$i] ) ) $init.= $md5[$i];
   }
   $init = substr( $init, 0, 8 );
   mt_srand( $init );
@@ -32,26 +37,19 @@ function generate_key()
   for ( $i = 0; $i < $conf['session_id_size']; $i++ )
   {
     $c = mt_rand( 0, 2 );
-    if ( $c == 0 )
-    {
-      $key .= chr( mt_rand( 65, 90 ) );
-    }
-    else if ( $c == 1 )
-    {
-      $key .= chr( mt_rand( 97, 122 ) );
-    }
-    else
-    {
-      $key .= mt_rand( 0, 9 );
-    }
+    if ( $c == 0 )      $key .= chr( mt_rand( 65, 90 ) );
+    else if ( $c == 1 ) $key .= chr( mt_rand( 97, 122 ) );
+    else                $key .= mt_rand( 0, 9 );
   }
   return $key;
 }
-        
+
+// The function create_session finds a non-already-used session key and
+// returns it once found for the given user.
 function session_create( $username )
 {
   global $conf;
-  // 1. searching an unused sesison key
+  // 1. searching an unused session key
   $id_found = false;
   while ( !$id_found )
   {
@@ -89,6 +87,9 @@ function session_create( $username )
 function add_session_id( $url, $redirect = false )
 {
   global $page, $user;
+
+  if ( $user['has_cookie'] ) return $url;
+
   $amp = '&amp;';
   if ( $redirect )
   {
@@ -110,4 +111,13 @@ function add_session_id( $url, $redirect = false )
     return $url;
   }
 }
+
+// cookie_path returns the path to use for the PhpWebGallery cookie.
+// If PhpWebGallery is installed on :
+// http://domain.org/meeting/gallery/category.php
+// cookie_path will return : "/meeting/gallery"
+function cookie_path()
+{
+  return substr($_SERVER['PHP_SELF'],0,strrpos( $_SERVER['PHP_SELF'],'/'));
+}
 ?>
\ No newline at end of file
diff --git a/include/user.inc.php b/include/user.inc.php
index f950b3a1e..a90e8983d 100644
--- a/include/user.inc.php
+++ b/include/user.inc.php
@@ -32,35 +32,60 @@ foreach ( $infos as $i => $info ) {
 $query_user.= ' FROM '.PREFIX_TABLE.'users';
 $query_done = false;
 $user['is_the_guest'] = false;
-if ( isset( $_GET['id'] )
-     && ereg( "^[0-9a-zA-Z]{".$conf['session_id_size']."}$", $_GET['id'] ) )
+
+// cookie deletion if administrator don't authorize them anymore
+if ( !$conf['authorize_cookies'] and isset( $_COOKIE['id'] ) )
+{
+  setcookie( 'id', '', 0, cookie_path() );
+  $url = 'category.php';
+  header( 'Request-URI: '.$url );  
+  header( 'Content-Location: '.$url );  
+  header( 'Location: '.$url );
+  exit();
+}
+
+$user['has_cookie'] = false;
+if     ( isset( $_GET['id']    ) ) $session_id = $_GET['id'];
+elseif ( isset( $_COOKIE['id'] ) )
 {
-  $page['session_id'] = $_GET['id'];
+  $session_id = $_COOKIE['id'];
+  $user['has_cookie'] = true;
+}
+
+if ( isset( $session_id )
+     and ereg( "^[0-9a-zA-Z]{".$conf['session_id_size']."}$", $session_id ) )
+{
+  $page['session_id'] = $session_id;
   $query = 'SELECT user_id,expiration,ip';
   $query.= ' FROM '.PREFIX_TABLE.'sessions';
-  $query.= " WHERE id = '".$_GET['id']."'";
+  $query.= " WHERE id = '".$page['session_id']."'";
   $query.= ';';
   $result = mysql_query( $query );
   if ( mysql_num_rows( $result ) > 0 )
   {
     $row = mysql_fetch_array( $result );
-    if ( $row['expiration'] < time() )
-    {
-      // deletion of the session from the database,
-      // because it is out-of-date
-      $delete_query = 'DELETE FROM '.PREFIX_TABLE.'sessions';
-      $delete_query.= " WHERE id = '".$page['session_id']."'";
-      $delete_query.= ';';
-      mysql_query( $delete_query );
-    }
-    else
+    if ( !$user['has_cookie'] )
     {
+      if ( $row['expiration'] < time() )
+      {
+        // deletion of the session from the database,
+        // because it is out-of-date
+        $delete_query = 'DELETE FROM '.PREFIX_TABLE.'sessions';
+        $delete_query.= " WHERE id = '".$page['session_id']."'";
+        $delete_query.= ';';
+        mysql_query( $delete_query );
+      }
       if ( $_SERVER['REMOTE_ADDR'] == $row['ip'] )
       {
         $query_user .= ' WHERE id = '.$row['user_id'];
         $query_done = true;
       }
     }
+    else
+    {
+      $query_user .= ' WHERE id = '.$row['user_id'];
+      $query_done = true;
+    }
   }
 }
 if ( !$query_done )
diff --git a/language/francais.php b/language/francais.php
index 8e0f294e9..93fcc72cc 100644
--- a/language/francais.php
+++ b/language/francais.php
@@ -136,6 +136,11 @@ $lang['customize_long_period'] = 'période longue';
 $lang['customize_template'] = 'template';
 $lang['err_periods'] = 'les périodes doivent être des entiers';
 $lang['err_periods_2'] = 'les périodes doivent être supérieures à 0, la période longue doit être plus grande que la période courte';
+$lang['create_cookie'] = 'créer un cookie';
+$lang['customize_day'] = 'jour';
+$lang['customize_week'] = 'semaine';
+$lang['customize_month'] = 'mois';
+$lang['customize_year'] = 'an';
 // end version 1.3
 $lang['maxwidth'] = 'largeur maximum des images';
 $lang['maxheight'] = 'hauteur maximum des images';
@@ -399,6 +404,10 @@ if ( $isadmin )
   $lang['conf_session_key_info'] = '- le mot-clef de session permet d\'améliorer le cryptage des identifiants de session.<br />- mettez n\'importe quelle chaîne de moins de 255 caractères.';
   $lang['conf_session_delete'] = 'supprimer les sessions périmées';
   $lang['conf_session_delete_info'] = 'il est recommandé de vider sa table de sessions car les sessions périmées restent enregistrées (mais ça ne pose pas de problème de sécurité)';
+  // start version 1.3
+  $lang['conf_session_cookie'] = 'autoriser les cookies';
+  $lang['conf_session_cookie_info'] = 'les utilisateurs ne seront plus obligés de s\'identifier à chaque visite.';
+  // end version 1.3
 		
   // page user, clés générales
   $lang['user_err_modify'] = 'Cet utilisateur ne peut pas être modifé ou supprimé';
diff --git a/profile.php b/profile.php
index 7a47783a5..6d7cf557c 100644
--- a/profile.php
+++ b/profile.php
@@ -103,13 +103,18 @@ if ( isset( $_POST['submit'] ) )
       $query.= ';';
       mysql_query( $query );
     }
+    if ( $_POST['create_cookie'] == 1 )
+    {
+      setcookie( 'id',$page['session_id'],$_POST['cookie_expiration'],
+                 cookie_path() );
+    }
     // redirection
     $url = 'category.php?cat='.$page['cat'].'&expand='.$_GET['expand'];
     if ( $page['cat'] == 'search' )
     {
       $url.= '&search='.$_GET['search'].'&mode='.$_GET['mode'];
     }
-    $url = add_session_id( $url, true );
+    if ( $_POST['create_cookie'] != 1 ) $url = add_session_id( $url, true );
     header( 'Request-URI: '.$url );  
     header( 'Content-Location: '.$url );  
     header( 'Location: '.$url );
@@ -121,7 +126,7 @@ $vtp = new VTemplate;
 $handle = $vtp->Open( './template/'.$user['template'].'/profile.vtp' );
 initialize_template();
 $tpl = array( 'customize_page_title','customize_title','password','new',
-              'reg_confirm','submit' );
+              'reg_confirm','submit','create_cookie' );
 templatize_array( $tpl, 'lang', $handle );
 //----------------------------------------------------------------- form action
 $url = './profile.php?cat='.$page['cat'].'&amp;expand='.$page['expand'];
@@ -340,6 +345,28 @@ if ( in_array( 'show_nb_comments', $infos ) )
   $vtp->closeSession( $handle, 'group' );
   $vtp->closeSession( $handle, 'line' );
 }
+//--------------------------------------------------------------- create cookie
+if ( $conf['authorize_cookies'] )
+{
+  $vtp->addSession( $handle, 'cookie' );
+  $options = array(
+    array( 'message' => '1 '.$lang['customize_day'],
+           'value' => time() + 24*60*60 ),
+    array( 'message' => '1 '.$lang['customize_week'],
+           'value' => time() + 7*24*60*60 ),
+    array( 'message' => '1 '.$lang['customize_month'],
+           'value' => time() + 30*24*60*60 ),
+    array( 'message' => '1 '.$lang['customize_year'],
+           'value' => time() + 365*24*60*60 )
+    );
+  foreach ( $options as $option ) {
+    $vtp->addSession( $handle, 'expiration_option' );
+    $vtp->setVar( $handle, 'expiration_option.option', $option['message'] );
+    $vtp->setVar( $handle, 'expiration_option.value', $option['value'] );
+    $vtp->closeSession( $handle, 'expiration_option' );
+  }
+  $vtp->closeSession( $handle, 'cookie' );
+}
 //----------------------------------------------------------- html code display
 $code = $vtp->Display( $handle, 0 );
 echo $code;
diff --git a/template/default/profile.vtp b/template/default/profile.vtp
index 0d1d20fe3..3aef1460a 100644
--- a/template/default/profile.vtp
+++ b/template/default/profile.vtp
@@ -58,13 +58,28 @@
                         <td colspan="2">&nbsp;</td>
                       </tr>
                       <tr>
-                        <td class="menu">{#new} {#password}<input type="checkbox" name="use_new_pwd" value="1" /></td>
+                        <td class="menu">{#new} {#password} <input type="checkbox" name="use_new_pwd" value="1" /></td>
                         <td class="menu"><input type="password" name="password" value="" /></td>
                       </tr>
                       <tr>
                         <td class="menu">{#reg_confirm}</td>
                         <td class="menu"><input type="password" name="passwordConf" value="" /></td>
                       </tr>
+                      <!--VTP_cookie-->
+                      <tr>
+                        <td colspan="2">&nbsp;</td>
+                      </tr>
+                      <tr>
+                        <td class="menu">{#create_cookie} <input type="checkbox" name="create_cookie" value="1" /></td>
+                        <td class="menu">
+                          <select name="cookie_expiration">
+                          <!--VTP_expiration_option-->
+                            <option value="{#value}">{#option}</option>
+                          <!--/VTP_expiration_option-->
+                          </select>
+                        </td>
+                      </tr>
+                      <!--/VTP_cookie-->
                       <tr>
                         <td colspan="2">&nbsp;</td>
                       </tr>