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<?php
/**
* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
class OC_DB_MDB2SchemaReader {
static protected $DBNAME;
static protected $DBTABLEPREFIX;
static protected $platform;
public static function loadSchemaFromFile($file, $platform) {
self::$DBNAME = OC_Config::getValue( "dbname", "owncloud" );
self::$DBTABLEPREFIX = OC_Config::getValue( "dbtableprefix", "oc_" );
self::$platform = $platform;
$schema = new \Doctrine\DBAL\Schema\Schema();
$xml = simplexml_load_file($file);
foreach($xml->children() as $child) {
switch($child->getName()) {
case 'name':
$name = (string)$child;
$name = str_replace( '*dbname*', self::$DBNAME, $name );
break;
case 'create':
case 'overwrite':
case 'charset':
break;
case 'table':
self::loadTable($schema, $child);
break;
default:
throw new DomainException('Unknown element: '.$child->getName());
}
}
return $schema;
}
private static function loadTable($schema, $xml) {
foreach($xml->children() as $child) {
switch($child->getName()) {
case 'name':
$name = (string)$child;
$name = str_replace( '*dbprefix*', self::$DBTABLEPREFIX, $name );
$table = $schema->createTable($name);
break;
case 'create':
case 'overwrite':
case 'charset':
break;
case 'declaration':
self::loadDeclaration($table, $child);
break;
default:
throw new DomainException('Unknown element: '.$child->getName());
}
}
}
private static function loadDeclaration($table, $xml) {
foreach($xml->children() as $child) {
switch($child->getName()) {
case 'field':
self::loadField($table, $child);
break;
case 'index':
self::loadIndex($table, $child);
break;
default:
throw new DomainException('Unknown element: '.$child->getName());
}
}
}
private static function loadField($table, $xml) {
$options = array();
foreach($xml->children() as $child) {
switch($child->getName()) {
case 'name':
$name = (string)$child;
break;
case 'type':
$type = (string)$child;
switch($type) {
case 'text':
$type = 'string';
break;
case 'clob':
$type = 'text';
break;
case 'timestamp':
$type = 'datetime';
break;
// TODO
return;
}
break;
case 'length':
$length = (string)$child;
$options['length'] = $length;
break;
case 'unsigned':
$unsigned = self::asBool($child);
$options['unsigned'] = $unsigned;
break;
case 'notnull':
$notnull = self::asBool($child);
$options['notnull'] = $notnull;
break;
case 'autoincrement':
$autoincrement = self::asBool($child);
$options['autoincrement'] = $autoincrement;
break;
case 'default':
$default = (string)$child;
$options['default'] = $default;
break;
default:
throw new DomainException('Unknown element: '.$child->getName());
}
}
if (isset($name) && isset($type)) {
if (empty($options['default'])) {
if (empty($options['notnull']) || !$options['notnull']) {
unset($options['default']);
}
if ($type == 'integer') {
$options['default'] = 0;
}
if (!empty($options['autoincrement']) && $options['autoincrement']) {
unset($options['default']);
}
}
if ($type == 'integer') {
$length = $options['length'];
if ($length == 1) {
$type = 'boolean';
}
else if ($length < 4) {
$type = 'smallint';
}
else if ($length > 4) {
$type = 'bigint';
}
}
$table->addColumn($name, $type, $options);
if (!empty($options['autoincrement'])
&& !empty($options['notnull'])) {
$table->setPrimaryKey(array($name));
}
}
}
private static function loadIndex($table, $xml) {
$name = null;
$fields = array();
foreach($xml->children() as $child) {
switch($child->getName()) {
case 'name':
$name = (string)$child;
break;
case 'primary':
$primary = self::asBool($child);
break;
case 'unique':
$unique = self::asBool($child);
break;
case 'field':
foreach($child->children() as $field) {
switch($field->getName()) {
case 'name':
$field_name = (string)$field;
$keywords = self::$platform->getReservedKeywordsList();
if ($keywords->isKeyword($field_name)) {
$field_name = self::$platform->quoteIdentifier($field_name);
}
$fields[] = $field_name;
break;
case 'sorting':
break;
default:
throw new DomainException('Unknown element: '.$field->getName());
}
}
break;
default:
throw new DomainException('Unknown element: '.$child->getName());
}
}
if (!empty($fields)) {
if (isset($primary) && $primary) {
$table->setPrimaryKey($fields, $name);
} else
if (isset($unique) && $unique) {
$table->addUniqueIndex($fields, $name);
} else {
$table->addIndex($fields, $name);
}
} else {
throw new DomainException('Empty index definition: '.$name.' options:'. print_r($fields, true));
}
}
private static function asBool($xml) {
$result = (string)$xml;
if ($result == 'true') {
$result = true;
} else
if ($result == 'false') {
$result = false;
}
return (bool)$result;
}
}
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