<?php
require_once('common.php');

// vim ts=4:sw=4:et
# Note: run with upgrade.php?debug=1 to see all SQL error messages


/** 
 * Use this to check whether an object (Table, index etc) exists within a 
 * PostgreSQL database.
 * @param String the object name
 * @return boolean true if it exists
 */
function _pgsql_object_exists($name) {
    $sql = "select relname from pg_class where relname = '$name'";
    $r = db_query($sql);
    if($r['rows'] == 1) {
        return true;
    }
    return false;
}

function _pgsql_field_exists($table, $field) {
    $sql = '
    SELECT
        a.attname,
        pg_catalog.format_type(a.atttypid, a.atttypmod) AS "Datatype"
    FROM
        pg_catalog.pg_attribute a
    WHERE
        a.attnum > 0
        AND NOT a.attisdropped
        AND a.attrelid = (
            SELECT c.oid
            FROM pg_catalog.pg_class c
                LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relname ~ ' . "'^($table)\$' 
                AND pg_catalog.pg_table_is_visible(c.oid)
        )
        AND a.attname = '$field' ";
//    echo $sql;
    $r = db_query($sql);
    $row = db_row($r['result']);
    if($row) {
        return true;
    }
    return false;
}


if($CONF['database_type'] == 'pgsql') {
    // check if table already exists, if so, don't recreate it
    $r = db_query("SELECT relname FROM pg_class WHERE relname = 'config'");
    if($r['rows'] == 0) {
        $pgsql = "
            CREATE TABLE  " . table_by_key ('config') . " ( 
                    id SERIAL,
                    name VARCHAR(20) NOT NULL UNIQUE,
                    value VARCHAR(20) NOT NULL,
                    PRIMARY KEY(id)
                    )";
        db_query_parsed($pgsql);
    }
}
else {
    $mysql = "
        CREATE TABLE {IF_NOT_EXISTS} " . table_by_key ('config') . "(
        `id` {AUTOINCREMENT} {PRIMARY},
        `name`  VARCHAR(20) {LATIN1} NOT NULL DEFAULT '',
        `value` VARCHAR(20) {LATIN1} NOT NULL DEFAULT '',
        UNIQUE name ( `name` )
        )
    ";
    db_query_parsed($mysql, 0, " ENGINE = MYISAM COMMENT = 'PostfixAdmin settings'");
}

$sql = "SELECT * FROM config WHERE name = 'version'";

// insert into config('version', '01');

$r = db_query($sql);

if($r['rows'] == 1) {
    $rs = $r['result'];
    $row = db_array($rs);
    $version = $row['value'];
} else {
    $version = 0;
}

_do_upgrade($version);


function _do_upgrade($current_version) {
    global $CONF;
    $target_version = preg_replace('/[^0-9]/', '', '$Revision$');

    if ($current_version >= $target_version) {
# already up to date
        echo "Database is up to date";
        return true;
    }

    echo "<p>Updating database:<p>old version: $current_version; target version: $target_version";

    for ($i = $current_version +1; $i <= $target_version; $i++) {
        $function = "upgrade_$i";
        $function_mysql = $function . "_mysql";
        $function_pgsql = $function . "_pgsql";
        if (function_exists($function)) {
            echo "<p>updating to version $i (all databases)...";
            $function();
            echo " &nbsp; done";
        }
        if ($CONF['database_type'] == 'mysql' || $CONF['database_type'] == 'mysqli' ) {
            if (function_exists($function_mysql)) {
                echo "<p>updating to version $i (MySQL)...";
                $function_mysql();
                echo " &nbsp; done";
            }
        } elseif($CONF['database_type'] == 'pgsql') {
            if (function_exists($function_pgsql)) {
                echo "<p>updating to version $i (PgSQL)...";
                $function_pgsql();
                echo " &nbsp; done";
            }
        } 
        // Update config table so we don't run the same query twice in the future.
        $i = (int) $i;
        $sql = "UPDATE config SET value = $i WHERE name = 'version'";
        db_query($sql);
    };
}

/**
 * Replaces database specific parts in a query
 * @param String sql query with placeholders
 * @param int (optional) whether errors should be ignored (0=false)
 * @param String (optional) MySQL specific code to attach, useful for COMMENT= on CREATE TABLE
 * @return String sql query
 */ 

function db_query_parsed($sql, $ignore_errors = 0, $attach_mysql = "") {
    global $CONF;

    if ($CONF['database_type'] == 'mysql' || $CONF['database_type'] == 'mysqli' ) {

        $replace = array(
                '{AUTOINCREMENT}'   => 'int(11) not null auto_increment', 
                '{PRIMARY}'         => 'primary key',
                '{UNSIGNED}'        => 'unsigned'  , 
                '{FULLTEXT}'        => 'FULLTEXT', 
                '{BOOLEAN}'         => 'tinyint(1) NOT NULL',
                '{UTF-8}'           => '/*!40100 CHARACTER SET utf8 COLLATE utf8_unicode_ci */',
                '{LATIN1}'          => '/*!40100 CHARACTER SET latin1 COLLATE latin1_swedish_ci */',
                '{IF_NOT_EXISTS}'   => 'IF NOT EXISTS',
                '{RENAME_COLUMN}'   => 'CHANGE COLUMN',
                );
        $sql = "$sql $attach_mysql";

    } elseif($CONF['database_type'] == 'pgsql') {
        $replace = array(
                '{AUTOINCREMENT}'   => 'SERIAL', 
                '{PRIMARY}'         => 'primary key', 
                '{UNSIGNED}'        => '', 
                '{FULLTEXT}'        => '', 
                '{BOOLEAN}'         => 'BOOLEAN NOT NULL', 
                '{UTF-8}'           => '', # TODO: UTF-8 is simply ignored.
                '{LATIN1}'          => '', # TODO: same for latin1 
                '{IF_NOT_EXISTS}'   => '', # TODO: does this work with PgSQL? NO
                '{RENAME_COLUMN}'   => 'ALTER COLUMN', # PgSQL : ALTER TABLE x RENAME x TO y
                'int(1)'            => 'int',
                'int(10)'           => 'int', 
                'int(11)'           => 'int', 
                'int(4)'            => 'int', 
                );

    } else {
        echo "Sorry, unsupported database type " . $conf['database_type'];
        exit;
    }

    $replace['{BOOL_TRUE}'] = db_get_boolean(True);
    $replace['{BOOL_FALSE}'] = db_get_boolean(False);

    $query = trim(str_replace(array_keys($replace), $replace, $sql));
    if (safeget('debug') != "") {
        print "<p style='color:#999'>$query";
	}
    $result = db_query($query, $ignore_errors);
    if (safeget('debug') != "") {
        print "<div style='color:#f00'>" . $result['error'] . "</div>";
    }
    return $result;
}

function _drop_index ($table, $index) {
    global $CONF;
    $tabe = table_by_key ($table);

    if ($CONF['database_type'] == 'mysql' || $CONF['database_type'] == 'mysqli' ) {
        return "ALTER TABLE $table DROP INDEX $index";
    } elseif($CONF['database_type'] == 'pgsql') {
        return "DROP INDEX $index"; # Index names are unique with a DB for PostgreSQL
    } else {
        echo "Sorry, unsupported database type " . $conf['database_type'];
        exit;
    }
}

function upgrade_1() {
# inserting the version number is a good start ;-)
    db_insert(
            'config', 
            array(
                'name' => 'version',
                'value' => '1',
                )
            );
    echo "upgrade_1";
}

function upgrade_2_mysql() {
# upgrade pre-2.1 database
# from TABLE_BACKUP_MX.TXT
    $table_domain = table_by_key ('domain');
    $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN transport VARCHAR(255) AFTER maxquota;", TRUE);
    // don't think PGSQL supports 'AFTER transport'
    $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN backupmx {BOOLEAN} DEFAULT {BOOL_FALSE} AFTER transport;", TRUE);
    # possible errors that can be ignored:
    # - Invalid query: Table 'postfix.domain' doesn't exist
}

function upgrade_2_pgsql() {

    if(!_pgsql_object_exists(table_by_key('domain'))) {
        db_query_parsed("
            CREATE TABLE " . table_by_key('domain') . " (
                domain character varying(255) NOT NULL,
                description character varying(255) NOT NULL default '',
                aliases integer NOT NULL default 0,
                mailboxes integer NOT NULL default 0,
                maxquota integer NOT NULL default 0,
                quota integer NOT NULL default 0,
                transport character varying(255) default NULL,
                backupmx boolean NOT NULL default false,
                created timestamp with time zone default now(),
                modified timestamp with time zone default now(),
                active boolean NOT NULL default true,
                Constraint \"domain_key\" Primary Key (\"domain\")
            ); 
            CREATE INDEX domain_domain_active ON " . table_by_key('domain') . "(domain,active);
            COMMENT ON TABLE " . table_by_key('domain') . " IS 'Postfix Admin - Virtual Domains';
        ");
    }
    if(!_pgsql_object_exists(table_by_key('admin'))) {
        db_query_parsed('
            CREATE TABLE ' . table_by_key("admin") . ' (
              "username" character varying(255) NOT NULL,
              "password" character varying(255) NOT NULL default \'\',
              "created" timestamp with time zone default now(),
              "modified" timestamp with time zone default now(),
              "active" boolean NOT NULL default true,
            Constraint "admin_key" Primary Key ("username")
        );' . "
        COMMENT ON TABLE " . table_by_key('admin') . " IS 'Postfix Admin - Virtual Admins';
        ");
    }

    if(!_pgsql_object_exists(table_by_key('alias'))) {
        db_query_parsed('
            CREATE TABLE ' . table_by_key('alias') . ' (
             address character varying(255) NOT NULL,
             goto text NOT NULL,
             domain character varying(255) NOT NULL REFERENCES domain,
             created timestamp with time zone default now(),
             modified timestamp with time zone default now(),
             active boolean NOT NULL default true,
             Constraint "alias_key" Primary Key ("address")
            );
            CREATE INDEX alias_address_active ON ' . table_by_key('alias') . '(address,active);
            COMMENT ON TABLE ' . table_by_key('alias') . ' IS \'Postfix Admin - Virtual Aliases\';
        ');
    }

    if(!_pgsql_object_exists(table_by_key('domain_admins'))) {
        db_query_parsed('
        CREATE TABLE ' . table_by_key('domain_admins') . ' (
             username character varying(255) NOT NULL,
             domain character varying(255) NOT NULL REFERENCES domain,
             created timestamp with time zone default now(),
             active boolean NOT NULL default true
            );
        COMMENT ON TABLE ' . table_by_key('domain_admins') . ' IS \'Postfix Admin - Domain Admins\';
        '); 
    }
    
    if(!_pgsql_object_exists(table_by_key('log'))) {
        db_query_parsed('
            CREATE TABLE ' . table_by_key('log') . ' (
             timestamp timestamp with time zone default now(),
             username character varying(255) NOT NULL default \'\',
             domain character varying(255) NOT NULL default \'\',
             action character varying(255) NOT NULL default \'\',
             data text NOT NULL default \'\'
            );
            COMMENT ON TABLE ' . table_by_key('log') . ' IS \'Postfix Admin - Log\';
        ');
    }

    if(!_pgsql_object_exists(table_by_key('mailbox'))) {
        db_query_parsed('
            CREATE TABLE mailbox (
                 username character varying(255) NOT NULL,
                 password character varying(255) NOT NULL default \'\',
                 name character varying(255) NOT NULL default \'\',
                 maildir character varying(255) NOT NULL default \'\',
                 quota integer NOT NULL default 0,
                 domain character varying(255) NOT NULL REFERENCES domain,
                 created timestamp with time zone default now(),
                 modified timestamp with time zone default now(),
                 active boolean NOT NULL default true,
                 Constraint "mailbox_key" Primary Key ("username")
                );
                CREATE INDEX mailbox_username_active ON ' . table_by_key('mailbox') . '(username,active);
                COMMENT ON TABLE ' . table_by_key('mailbox') . ' IS \'Postfix Admin - Virtual Mailboxes\';
        ');
    }

    if(!_pgsql_object_exists(table_by_key('vacation'))) {
        db_query_parsed('
            CREATE TABLE ' . table_by_key('vacation') . ' (
                email character varying(255) PRIMARY KEY,
                subject character varying(255) NOT NULL DEFAULT \'\',
                body text NOT NULL DEFAULT \'\',
                cache text NOT NULL DEFAULT \'\',
                "domain" character varying(255) NOT NULL REFERENCES "domain",
                created timestamp with time zone DEFAULT now(),
                active boolean DEFAULT true NOT NULL
            );
            CREATE INDEX vacation_email_active ON ' . table_by_key('vacation') . '(email,active);');
    }

    if(!_pgsql_object_exists(table_by_key('vacation_notification'))) {
        db_query_parsed('
            CREATE TABLE ' . table_by_key('vacation_notification') . ' (
                on_vacation character varying(255) NOT NULL REFERENCES vacation(email) ON DELETE CASCADE,
                notified character varying(255) NOT NULL,
                notified_at timestamp with time zone NOT NULL DEFAULT now(),
                CONSTRAINT vacation_notification_pkey primary key(on_vacation,notified)
            );
        ');
    }

    // this handles anyone who is upgrading... (and should have no impact on new installees)
    $table_domain = table_by_key ('domain');
    $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN transport VARCHAR(255)", TRUE);
    $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN backupmx BOOLEAN DEFAULT false", TRUE);
}

function upgrade_3_mysql() {
    # upgrade pre-2.1 database
    # from TABLE_CHANGES.TXT
    $table_admin = table_by_key ('admin');
    $table_alias = table_by_key ('alias');
    $table_domain = table_by_key ('domain');
    $table_mailbox = table_by_key ('mailbox');
    $table_vacation = table_by_key ('vacation');

    // these will not work on PostgreSQL; syntax is :
    // ALTER TABLE foo RENAME f1 TO f2 
    $all_sql = split("\n", trim("
        ALTER TABLE $table_admin {RENAME_COLUMN} create_date created DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_admin {RENAME_COLUMN} change_date modified DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_alias {RENAME_COLUMN} create_date created DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_alias {RENAME_COLUMN} change_date modified DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_domain {RENAME_COLUMN} create_date created DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_domain {RENAME_COLUMN} change_date modified DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_domain ADD COLUMN aliases INT(10) DEFAULT '-1' NOT NULL AFTER description;
    ALTER TABLE $table_domain ADD COLUMN mailboxes INT(10) DEFAULT '-1' NOT NULL AFTER aliases;
    ALTER TABLE $table_domain ADD COLUMN maxquota INT(10) DEFAULT '-1' NOT NULL AFTER mailboxes;
    ALTER TABLE $table_domain ADD COLUMN transport VARCHAR(255) AFTER maxquota;
    ALTER TABLE $table_domain ADD COLUMN backupmx TINYINT(1) DEFAULT '0' NOT NULL AFTER transport;
    ALTER TABLE $table_mailbox {RENAME_COLUMN} create_date created DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_mailbox {RENAME_COLUMN} change_date modified DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL;
    ALTER TABLE $table_mailbox ADD COLUMN quota INT(10) DEFAULT '-1' NOT NULL AFTER maildir;
    ALTER TABLE $table_vacation ADD COLUMN domain VARCHAR(255) DEFAULT '' NOT NULL AFTER cache;
    ALTER TABLE $table_vacation ADD COLUMN created DATETIME DEFAULT '0000-00-00 00:00:00' NOT NULL AFTER domain;
    ALTER TABLE $table_vacation ADD COLUMN active TINYINT(1) DEFAULT '1' NOT NULL AFTER created;
    ALTER TABLE $table_vacation DROP PRIMARY KEY
        ALTER TABLE $table_vacation ADD PRIMARY KEY(email)
        UPDATE $table_vacation SET domain=SUBSTRING_INDEX(email, '@', -1) WHERE email=email;
    "));

    foreach ($all_sql as $sql) {
        $result = db_query_parsed($sql, TRUE);
    }
    # Possible errors that can be ignored:
    # - Invalid query: Table 'postfix.*' doesn't exist
}

function upgrade_4_mysql() { # MySQL only
    # changes between 2.1 and moving to sourceforge
    $table_domain = table_by_key ('domain');
    $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN quota int(10) NOT NULL default '0' AFTER maxquota", TRUE);
    # Possible errors that can be ignored:
    # - Invalid query: Table 'postfix.domain' doesn't exist
}

/**
 * Changes between 2.1 and moving to sf.net
 */
function upgrade_4_pgsql() { 
    $table_domain = table_by_key('domain');
    $table_admin = table_by_key('admin');
    $table_alias = table_by_key('alias');
    $table_domain_admins = table_by_key('domain_admins');
    $table_log = table_by_key('log');
    $table_mailbox = table_by_key('mailbox');
    $table_vacation = table_by_key('vacation');

    if(!_pgsql_field_exists($table_domain, 'quota')) {
        $result = db_query_parsed("ALTER TABLE $table_domain ADD COLUMN quota int NOT NULL default '0'");
    }

    $result = db_query_parsed("ALTER TABLE $table_domain ALTER COLUMN domain DROP DEFAULT");
    if(!_pgsql_object_exists('domain_domain_active')) {
        $result = db_query_parsed("CREATE INDEX domain_domain_active ON domain(domain,active)");
    }

    $result = db_query_parsed("ALTER TABLE $table_domain_admins ALTER COLUMN domain DROP DEFAULT");
    $result = db_query_parsed("ALTER TABLE $table_alias ALTER COLUMN address DROP DEFAULT");
    $result = db_query_parsed("ALTER TABLE $table_alias ALTER COLUMN domain DROP DEFAULT");
    if(!_pgsql_object_exists('alias_address_active')) {
        $result = db_query_parsed("CREATE INDEX alias_address_active ON alias(address,active)");
    }


    $result = db_query_parsed("ALTER TABLE $table_domain_admins ALTER COLUMN username DROP DEFAULT");
    $result = db_query_parsed("ALTER TABLE $table_domain_admins ALTER COLUMN domain DROP DEFAULT");

    $result = db_query_parsed("
BEGIN;
ALTER TABLE $table_log RENAME COLUMN data TO data_old;
ALTER TABLE $table_log ADD COLUMN data text NOT NULL default '';
UPDATE $table_log SET data = CAST(data_old AS text);
ALTER TABLE $table_log DROP COLUMN data_old;
COMMIT;");

$result = db_query_parsed("ALTER TABLE $table_mailbox ALTER COLUMN username DROP DEFAULT");
$result = db_query_parsed("ALTER TABLE $table_mailbox ALTER COLUMN domain DROP DEFAULT");

$result = db_query_parsed("
BEGIN;
ALTER TABLE $table_mailbox RENAME COLUMN domain TO domain_old;
ALTER TABLE $table_mailbox ADD COLUMN domain varchar(255) REFERENCES domain (domain);
UPDATE $table_mailbox SET domain = domain_old;
ALTER TABLE $table_mailbox DROP COLUMN domain_old;
COMMIT;"
);
if(!_pgsql_object_exists('mailbox_username_active')) {
    db_query_parsed('CREATE INDEX mailbox_username_active ON mailbox(username,active)');
}


$result = db_query_parsed("ALTER TABLE $table_vacation ALTER COLUMN body SET DEFAULT ''");
if(_pgsql_field_exists($table_vacation, 'cache')) {
    $result = db_query_parsed("ALTER TABLE $table_vacation DROP COLUMN cache");
}

$result = db_query_parsed("
BEGIN;
ALTER TABLE $table_vacation RENAME COLUMN domain to domain_old;
ALTER TABLE $table_vacation ADD COLUMN domain varchar(255) REFERENCES domain;
UPDATE $table_vacation SET domain = domain_old;
ALTER TABLE $table_vacation DROP COLUMN domain_old;
COMMIT;
");

if(!_pgsql_object_exists('vacation_email_active')) {
    $result = db_query_parsed("CREATE INDEX vacation_email_active ON vacation(email,active)");
}

if(!_pgsql_object_exists('vacation_notification')) {
    $result = db_query_parsed("
        CREATE TABLE vacation_notification (
            on_vacation character varying(255) NOT NULL REFERENCES vacation(email) ON DELETE CASCADE,
            notified character varying(255) NOT NULL,
            notified_at timestamp with time zone NOT NULL DEFAULT now(),
    CONSTRAINT vacation_notification_pkey primary key(on_vacation,notified)
);");
}
}


# Possible errors that can be ignored:
# 
# NO MySQL errors should be ignored below this line!


/**
 * create tables
 * version: Sourceforge SVN r1 of DATABASE_MYSQL.txt
 * changes compared to DATABASE_MYSQL.txt:
 * - removed MySQL user and database creation
 * - removed creation of default superadmin
 */
function upgrade_5_mysql() {

    $result = db_query_parsed("
        CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('admin') . "` (
            `username` varchar(255) NOT NULL default '',
            `password` varchar(255) NOT NULL default '',
            `created` datetime NOT NULL default '0000-00-00 00:00:00',
            `modified` datetime NOT NULL default '0000-00-00 00:00:00',
            `active` tinyint(1) NOT NULL default '1',
            PRIMARY KEY  (`username`),
    KEY username (`username`)
) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Virtual Admins';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('alias') . "` (
        `address` varchar(255) NOT NULL default '',
        `goto` text NOT NULL,
        `domain` varchar(255) NOT NULL default '',
        `created` datetime NOT NULL default '0000-00-00 00:00:00',
        `modified` datetime NOT NULL default '0000-00-00 00:00:00',
        `active` tinyint(1) NOT NULL default '1',
        PRIMARY KEY  (`address`),
KEY address (`address`)
        ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Virtual Aliases';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('domain') . "` (
        `domain` varchar(255) NOT NULL default '',
        `description` varchar(255) NOT NULL default '',
        `aliases` int(10) NOT NULL default '0',
        `mailboxes` int(10) NOT NULL default '0',
        `maxquota` int(10) NOT NULL default '0',
        `quota` int(10) NOT NULL default '0',
        `transport` varchar(255) default NULL,
        `backupmx` tinyint(1) NOT NULL default '0',
        `created` datetime NOT NULL default '0000-00-00 00:00:00',
        `modified` datetime NOT NULL default '0000-00-00 00:00:00',
        `active` tinyint(1) NOT NULL default '1',
        PRIMARY KEY  (`domain`),
KEY domain (`domain`)
        ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Virtual Domains';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('domain_admins') . "` (
        `username` varchar(255) NOT NULL default '',
        `domain` varchar(255) NOT NULL default '',
        `created` datetime NOT NULL default '0000-00-00 00:00:00',
        `active` tinyint(1) NOT NULL default '1',
        KEY username (`username`)
    ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Domain Admins';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('log') . "` (
        `timestamp` datetime NOT NULL default '0000-00-00 00:00:00',
        `username` varchar(255) NOT NULL default '',
        `domain` varchar(255) NOT NULL default '',
        `action` varchar(255) NOT NULL default '',
        `data` varchar(255) NOT NULL default '',
        KEY timestamp (`timestamp`)
    ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Log';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('mailbox') . "` (
        `username` varchar(255) NOT NULL default '',
        `password` varchar(255) NOT NULL default '',
        `name` varchar(255) NOT NULL default '',
        `maildir` varchar(255) NOT NULL default '',
        `quota` int(10) NOT NULL default '0',
        `domain` varchar(255) NOT NULL default '',
        `created` datetime NOT NULL default '0000-00-00 00:00:00',
        `modified` datetime NOT NULL default '0000-00-00 00:00:00',
        `active` tinyint(1) NOT NULL default '1',
        PRIMARY KEY  (`username`),
KEY username (`username`)
        ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Virtual Mailboxes';
");

$result = db_query_parsed("
    CREATE TABLE {IF_NOT_EXISTS} `" . table_by_key('vacation') . "` (
        `email` varchar(255) NOT NULL default '',
        `subject` varchar(255) NOT NULL default '',
        `body` text NOT NULL default '',
        `cache` text NOT NULL default '',
        `domain` varchar(255) NOT NULL default '',
        `created` datetime NOT NULL default '0000-00-00 00:00:00',
        `active` tinyint(1) NOT NULL default '1',
        PRIMARY KEY  (`email`),
KEY email (`email`)
        ) TYPE=MyISAM DEFAULT {LATIN1} COMMENT='Postfix Admin - Virtual Vacation';
");
}

/**
 * drop useless indicies (already available as primary key)
 */
function upgrade_79_mysql() { # MySQL only
    $result = db_query_parsed(_drop_index('admin', 'username'), True);
    $result = db_query_parsed(_drop_index('alias', 'address'), True);
    $result = db_query_parsed(_drop_index('domain', 'domain'), True);
    $result = db_query_parsed(_drop_index('mailbox', 'username'), True);
}

function upgrade_81_mysql() { # MySQL only
    $table_vacation = table_by_key ('vacation');
    $table_vacation_notification = table_by_key('vacation_notification');

    $all_sql = split("\n", trim("
        ALTER TABLE `$table_vacation` CHANGE `email`    `email`   VARCHAR( 255 ) {LATIN1} NOT NULL
        ALTER TABLE `$table_vacation` CHANGE `subject`  `subject` VARCHAR( 255 ) {UTF-8}  NOT NULL
        ALTER TABLE `$table_vacation` CHANGE `body`     `body`    TEXT           {UTF-8}  NOT NULL
        ALTER TABLE `$table_vacation` CHANGE `cache`    `cache`   TEXT           {LATIN1} NOT NULL
        ALTER TABLE `$table_vacation` CHANGE `domain`   `domain`  VARCHAR( 255 ) {LATIN1} NOT NULL
        ALTER TABLE `$table_vacation` CHANGE `active`   `active`  TINYINT( 1 )            NOT NULL DEFAULT '1'
        ALTER TABLE `$table_vacation` DEFAULT                                    {LATIN1}
    ALTER TABLE `$table_vacation` ENGINE = INNODB
    "));

    foreach ($all_sql as $sql) {
        $result = db_query_parsed($sql, TRUE);
    }

    # creation of vacation_notification table moved to upgrade_318_mysql because
    # the query in this function was broken (key length vs. utf8 charset)
}

/**
 * Make logging translatable - i.e. create alias => create_alias
 */
function upgrade_90() {
    $result = db_query_parsed("UPDATE " . table_by_key ('log') . " SET action = REPLACE(action,' ','_')", TRUE);
    # change edit_alias_state to edit_alias_active
    $result = db_query_parsed("UPDATE " . table_by_key ('log') . " SET action = 'edit_alias_state' WHERE action = 'edit_alias_active'", TRUE);
}

/**
 * MySQL only allow quota > 2 GB
 */
function upgrade_169_mysql() { 

    $table_domain = table_by_key ('domain');
    $table_mailbox = table_by_key ('mailbox');
    $result = db_query_parsed("ALTER TABLE $table_domain MODIFY COLUMN `quota` bigint(20) NOT NULL default '0'", TRUE);
    $result = db_query_parsed("ALTER TABLE $table_domain MODIFY COLUMN `maxquota` bigint(20) NOT NULL default '0'", TRUE);
    $result = db_query_parsed("ALTER TABLE $table_mailbox MODIFY COLUMN `quota` bigint(20) NOT NULL default '0'", TRUE);
}


/**
 * Create / modify vacation_notification table.
 * Note: This might not work if users used workarounds to create the table before.
 * In this case, dropping the table is the easiest solution.
 */
function upgrade_318_mysql() {
    $table_vacation_notification = table_by_key('vacation_notification');

    db_query_parsed( "
        CREATE TABLE {IF_NOT_EXISTS} $table_vacation_notification (
            on_vacation varchar(255) NOT NULL,
            notified varchar(255) NOT NULL,
            notified_at timestamp NOT NULL default now(),
    PRIMARY KEY on_vacation (`on_vacation`, `notified`),
    CONSTRAINT `vacation_notification_pkey` 
    FOREIGN KEY (`on_vacation`) REFERENCES vacation(`email`) ON DELETE CASCADE
)
ENGINE=InnoDB DEFAULT {LATIN1} TYPE=InnoDB 
COMMENT='Postfix Admin - Virtual Vacation Notifications'
");

# in case someone has manually created the table with utf8 fields before:
$all_sql = split("\n", trim("
    ALTER TABLE `$table_vacation_notification` DROP FOREIGN KEY `vacation_notification_pkey`
    ALTER TABLE `$table_vacation_notification` CHANGE `on_vacation` `on_vacation` VARCHAR( 255 ) {LATIN1} NOT NULL
    ALTER TABLE `$table_vacation_notification` CHANGE `notified`    `notified`    VARCHAR( 255 ) {LATIN1} NOT NULL
    ALTER TABLE `$table_vacation_notification` DEFAULT                                           {LATIN1}
"));
# Possible errors that can be ignored:
# None.
# If something goes wrong, the user should drop the vacation_notification table 
# (not a great loss) and re-create it using this function.

foreach ($all_sql as $sql) {
    $result = db_query_parsed($sql);
}

# create constraint...
$result = db_query_parsed("
    ALTER TABLE $table_vacation_notification ADD CONSTRAINT `vacation_notification_pkey` 
    FOREIGN KEY (`on_vacation`) REFERENCES vacation(`email`) ON DELETE CASCADE
    ");
}

/*
   TODO

   Database changes that should be done:
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

MySQL:
* vacation: 
 - DROP INDEX email
 - 'cache' field might be obsolete with vacation_notification - needs to be checked!
* charset of equal fields MUST be the same (see bugreport)
 */