<?PHP


function glossary_upgrade($oldversion) {
/// This function does anything necessary to upgrade
/// older versions to match current functionality

    global $CFG;

    if ($oldversion < 2003091000) {
        execute_sql(" ALTER TABLE `{$CFG->prefix}glossary` ".
                    " ADD `allowduplicatedentries` TINYINT(2) UNSIGNED DEFAULT '0' NOT NULL AFTER `studentcanpost` , ".
                    " ADD `displayformat` TINYINT(2) UNSIGNED DEFAULT '0' NOT NULL AFTER `allowduplicatedentries` , ".
                    " ADD `mainglossary` TINYINT(2) UNSIGNED DEFAULT '0' NOT NULL AFTER `displayformat` ");

        execute_sql(" ALTER TABLE `{$CFG->prefix}glossary_entries` ".
                    " ADD timecreated INT(10) UNSIGNED NOT NULL default '0' AFTER `format` , ".
                    " ADD timemodified INT(10) UNSIGNED NOT NULL default '0' AFTER `timecreated` , ".
                    " ADD teacherentry TINYINT(2) UNSIGNED NOT NULL default '0' AFTER `timemodified` ");

        execute_sql(" INSERT INTO {$CFG->prefix}log_display VALUES ('glossary', 'delete', 'glossary', 'name') ");
        execute_sql(" INSERT INTO {$CFG->prefix}log_display VALUES ('glossary', 'delete entry', 'glossary', 'name') ");
    }
    
    if ( $oldversion < 2003091500 ) {
        execute_sql(" ALTER TABLE `{$CFG->prefix}glossary_entries` ".
                    " ADD attachment VARCHAR(100) NOT NULL default '' AFTER `format`");
    }

    if ( $oldversion < 2003091600 ) {
        execute_sql(" ALTER TABLE `{$CFG->prefix}glossary` ".
                    " ADD `showspecial` TINYINT(2) UNSIGNED DEFAULT '1' NOT NULL AFTER `mainglossary` , ".
                    " ADD `showalphabet` TINYINT(2) UNSIGNED DEFAULT '1' NOT NULL AFTER `showspecial` , ".
                    " ADD `showall` TINYINT(2) UNSIGNED DEFAULT '1' NOT NULL AFTER `showalphabet` ");
    }
    
    if ( $oldversion < 2003091800 ) {

        execute_sql("CREATE TABLE `{$CFG->prefix}glossary_categories` (
                    `id` INT(10) unsigned NOT NULL auto_increment,
                    `glossaryid` INT(10) UNSIGNED NOT NULL default '0',
                    `name` VARCHAR(255) NOT NULL default '',
                    PRIMARY KEY  (`id`)
                    ) TYPE=MyISAM COMMENT='all categories for glossary entries'");

        execute_sql("CREATE TABLE `{$CFG->prefix}glossary_entries_categories` (
                    `categoryid` INT(10) UNSIGNED NOT NULL default '1',
                    `entryid` INT(10) UNSIGNED NOT NULL default '0',
                    PRIMARY KEY  (`categoryid`, `entryid`)
                    ) TYPE=MyISAM COMMENT='categories of each glossary entry'");
                    
          // creating a default category for every glossary
        execute_sql("INSERT INTO `{$CFG->prefix}glossary_categories` (`glossaryid`, `name`)
                    SELECT `id`, '" . get_string("main","glossary") . "' FROM `{$CFG->prefix}glossary`");
                    

          // setting the default category for every entry.
        execute_sql("INSERT INTO `{$CFG->prefix}glossary_entries_categories` (`categoryid`, `entryid`)
                    SELECT c.id, e.id
                    FROM `{$CFG->prefix}glossary_entries` e, `{$CFG->prefix}glossary_categories` c
                    WHERE e.glossaryid = c.glossaryid");

     }

    return true;
}

?>