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117 lines
2.6 KiB
PHP
117 lines
2.6 KiB
PHP
<?php
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/**
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*
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* This file is part of the phpBB Forum Software package.
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*
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* @copyright (c) phpBB Limited <https://www.phpbb.com>
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* @license GNU General Public License, version 2 (GPL-2.0)
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*
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* For full copyright and license information, please see
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* the docs/CREDITS.txt file.
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*
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*/
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namespace phpbb\db\migration;
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/**
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* The migrator is responsible for applying new migrations in the correct order.
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*/
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class helper
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{
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/**
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* Get the schema steps from an array of schema changes
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*
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* This splits up $schema_changes into individual changes so that the
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* changes can be chunked
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*
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* @param array $schema_changes from migration
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* @return array
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*/
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public function get_schema_steps($schema_changes)
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{
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$steps = array();
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// Nested level of data (only supports 1/2 currently)
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$nested_level = array(
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'drop_tables' => 1,
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'add_tables' => 1,
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'change_columns' => 2,
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'add_columns' => 2,
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'drop_keys' => 2,
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'drop_columns' => 2,
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'add_primary_keys' => 2, // perform_schema_changes only uses one level, but second is in the function
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'add_unique_index' => 2,
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'add_index' => 2,
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);
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foreach ($nested_level as $change_type => $data_depth)
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{
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if (!empty($schema_changes[$change_type]))
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{
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foreach ($schema_changes[$change_type] as $key => $value)
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{
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if ($data_depth === 1)
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{
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$steps[] = array(
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'dbtools.perform_schema_changes', array(array(
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$change_type => array(
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(!is_int($key)) ? $key : 0 => $value,
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),
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)),
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);
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}
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else if ($data_depth === 2)
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{
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foreach ($value as $key2 => $value2)
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{
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$steps[] = array(
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'dbtools.perform_schema_changes', array(array(
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$change_type => array(
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$key => array(
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$key2 => $value2,
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),
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),
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)),
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);
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}
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}
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}
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}
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}
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return $steps;
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}
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/**
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* Reverse the update steps from an array of data changes
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*
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* 'If' statements and custom methods will be skipped, for all
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* other calls the reverse method of the tool class will be called
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*
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* @param array $steps Update changes from migration
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*
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* @return array
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*/
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public function reverse_update_data($steps)
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{
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$reversed_array = array();
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foreach ($steps as $step)
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{
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$parts = explode('.', $step[0]);
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$parameters = $step[1];
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$class = $parts[0];
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$method = isset($parts[1]) ? $parts[1] : false;
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if ($class !== 'if' && $class !== 'custom')
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{
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array_unshift($parameters, $method);
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$reversed_array[] = array($class . '.reverse', $parameters);
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}
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}
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return array_reverse($reversed_array);
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}
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}
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