- new feature : RSS notification feed. Feed generator is an external tool

(FeedCreator class v1.7.2). New file feed.php

- new database field : comments.validation_date (datetime). This field is
  required for notification feed.

- new database field : users.feed_id (varchar(50)). users.feed_id is an
  alias of users.id but is much more complicated to find (50 characters,
  figures or letters, case sensitive) : the purpose is to keep it secret (as
  far as possible).

- new database field : users.last_feed_check (datetime)

- new database field : users.registration_date (datetime)

- bug fixed : no need to add the (unavailable) session id to install.php in
  the installation form.

- modified database field : images.date_available become more precise (date
  to datetime). This precision is needed for notification feed.

- new index : comments_i1 (validation_date). Might be useful for feed
  queries.

- new index : comments_i2 (image_id). Useful each time you want to have
  informations about an element and its associated comments.

- version 9.11 of mysqldump outputs database field names and table names
  with backquote "`" (didn't find how to take them off)


git-svn-id: http://piwigo.org/svn/trunk@801 68402e56-0260-453c-a942-63ccdbb3a9ee

include/config_default.inc.php

@@ -212,4 +212,8 @@ $conf['show_version'] = true;
 // If the array is empty, the "Links" box won't be displayed on the main
 // page.
 $conf['links'] = array();
+
+// feed_period : how long between two feed refresh ? Possible values are
+// "hour", "half day", "day", "week", "month".
+$conf['feed_period'] = 'week';
 ?>

include/functions_user.inc.php

@@ -110,6 +110,7 @@ SELECT id
     $insert['nb_line_page'] = $conf['nb_line_page'];
     $insert['language'] = $conf['default_language'];
     $insert['recent_period'] = $conf['recent_period'];
+    $insert['feed_id'] = find_available_feed_id();
     $insert['expand'] = boolean_to_string($conf['auto_expand']);
     $insert['show_nb_comments'] = boolean_to_string($conf['show_nb_comments']);
     if ( $mail_address != '' )
@@ -141,6 +142,13 @@ INSERT INTO '.USERS_TABLE.'
       $is_first = false;
     }
     $query.= ')
+;';
+    pwg_query($query);
+
+    $query = '
+UPDATE '.USERS_TABLE.'
+  SET registration_date = NOW()
+  WHERE id = '.mysql_insert_id().'
 ;';
     pwg_query($query);
   }
@@ -379,4 +387,27 @@ SELECT username
   
   return $username;
 }
+
+/**
+ * search an available feed_id
+ *
+ * @return string feed identifier
+ */
+function find_available_feed_id()
+{
+  while (true)
+  {
+    $key = generate_key(50);
+    $query = '
+SELECT COUNT(*)
+  FROM '.USERS_TABLE.'
+  WHERE feed_id = \''.$key.'\'
+;';
+    list($count) = mysql_fetch_row(pwg_query($query));
+    if (0 == $count)
+    {
+      return $key;
+    }
+  }
+}
 ?>

include/template.php

@@ -156,11 +156,6 @@ class Template {
 
       // Run the compiled code.
       $_str = '';
-//      echo '<pre>'.($this->compiled_code[$handle]).'</pre>';
-      $fp = @fopen( './log/debug.log', 'a+' );
-      fwrite( $fp, "\n\n" );
-      fwrite( $fp, $this->compiled_code[$handle] );
-      fclose( $fp );
       eval($this->compiled_code[$handle]);
       $this->output.= $_str;