138 lines
4.1 KiB
PHP
138 lines
4.1 KiB
PHP
<?php
|
|
// This file is part of GNU social - https://www.gnu.org/software/social
|
|
//
|
|
// GNU social is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// GNU social is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* Database schema utilities
|
|
*
|
|
* @category Database
|
|
* @package GNUsocial
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @copyright 2009 StatusNet, Inc.
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
|
|
defined('GNUSOCIAL') || die();
|
|
|
|
class SchemaUpdater
|
|
{
|
|
public function __construct($schema)
|
|
{
|
|
$this->schema = $schema;
|
|
$this->checksums = $this->getChecksums();
|
|
}
|
|
|
|
/**
|
|
* @param string $tableName
|
|
* @param array $tableDef
|
|
*/
|
|
public function register($tableName, array $tableDef)
|
|
{
|
|
// Check if the table we're registering is related to a Managed_DataObject
|
|
if (is_a(ucfirst($tableName), 'Managed_DataObject', true)) {
|
|
call_user_func("{$tableName}::beforeSchemaUpdate");
|
|
}
|
|
|
|
$this->tables[$tableName] = $tableDef;
|
|
}
|
|
|
|
/**
|
|
* Go ping em!
|
|
*
|
|
* @fixme handle tables that belong on different database servers...?
|
|
*/
|
|
public function checkSchema()
|
|
{
|
|
$checksums = $this->checksums;
|
|
foreach ($this->tables as $table => $def) {
|
|
$checksum = $this->checksum($def);
|
|
if (empty($checksums[$table])) {
|
|
common_log(LOG_DEBUG, "No previous schema_version for $table: updating to $checksum");
|
|
} elseif ($checksums[$table] === $checksum) {
|
|
common_log(LOG_DEBUG, "Last schema_version for $table up to date: $checksum");
|
|
continue;
|
|
} else {
|
|
common_log(LOG_DEBUG, "Last schema_version for $table is {$checksums[$table]}: updating to $checksum");
|
|
}
|
|
//$this->conn->query('START TRANSACTION');
|
|
$this->schema->ensureTable($table, $def);
|
|
$this->saveChecksum($table, $checksum);
|
|
//$this->conn->commit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Calculate a checksum for this table definition array.
|
|
*
|
|
* @param array $def
|
|
* @return string
|
|
*/
|
|
public function checksum(array $def)
|
|
{
|
|
$flat = serialize($def);
|
|
return hash('sha3-256', $flat);
|
|
}
|
|
|
|
/**
|
|
* Pull all known table checksums into an array for easy lookup.
|
|
*
|
|
* @return array: associative array of table names to checksum strings
|
|
*/
|
|
protected function getChecksums()
|
|
{
|
|
$checksums = array();
|
|
|
|
try {
|
|
$sv = new Schema_version();
|
|
$sv->find();
|
|
while ($sv->fetch()) {
|
|
$checksums[$sv->table_name] = $sv->checksum;
|
|
}
|
|
|
|
return $checksums;
|
|
} catch (Exception $e) {
|
|
// no dice!
|
|
common_log(LOG_DEBUG, "Possibly schema_version table doesn't exist yet.");
|
|
}
|
|
|
|
return $checksums;
|
|
}
|
|
|
|
/**
|
|
* Save or update current available checksums.
|
|
*
|
|
* @param string $table
|
|
* @param string $checksum
|
|
*/
|
|
protected function saveChecksum($table, $checksum)
|
|
{
|
|
try {
|
|
$sv = new Schema_version();
|
|
$sv->table_name = $table;
|
|
$sv->checksum = $checksum;
|
|
$sv->modified = common_sql_now();
|
|
if (isset($this->checksums[$table])) {
|
|
$sv->update();
|
|
} else {
|
|
$sv->insert();
|
|
}
|
|
} catch (Exception $e) {
|
|
// no dice!
|
|
common_log(LOG_DEBUG, "Possibly schema_version table doesn't exist yet.");
|
|
}
|
|
$this->checksums[$table] = $checksum;
|
|
}
|
|
}
|