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| 1 | <?php |
| 2 | /** |
| 3 | * |
| 4 | * This file is part of the phpBB Forum Software package. |
| 5 | * |
| 6 | * @copyright (c) phpBB Limited <https://www.phpbb.com> |
| 7 | * @license GNU General Public License, version 2 (GPL-2.0) |
| 8 | * |
| 9 | * For full copyright and license information, please see |
| 10 | * the docs/CREDITS.txt file. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | namespace phpbb\db\migration; |
| 15 | |
| 16 | /** |
| 17 | * The migrator is responsible for applying new migrations in the correct order. |
| 18 | */ |
| 19 | class helper |
| 20 | { |
| 21 | /** |
| 22 | * Get the schema steps from an array of schema changes |
| 23 | * |
| 24 | * This splits up $schema_changes into individual changes so that the |
| 25 | * changes can be chunked |
| 26 | * |
| 27 | * @param array $schema_changes from migration |
| 28 | * @return array |
| 29 | */ |
| 30 | public function get_schema_steps($schema_changes) |
| 31 | { |
| 32 | $steps = array(); |
| 33 | |
| 34 | // Nested level of data (only supports 1/2 currently) |
| 35 | $nested_level = array( |
| 36 | 'drop_tables' => 1, |
| 37 | 'add_tables' => 1, |
| 38 | 'change_columns' => 2, |
| 39 | 'add_columns' => 2, |
| 40 | 'drop_keys' => 2, |
| 41 | 'drop_columns' => 2, |
| 42 | 'add_primary_keys' => 2, // perform_schema_changes only uses one level, but second is in the function |
| 43 | 'add_unique_index' => 2, |
| 44 | 'add_index' => 2, |
| 45 | 'rename_index' => 1, |
| 46 | ); |
| 47 | |
| 48 | foreach ($nested_level as $change_type => $data_depth) |
| 49 | { |
| 50 | if (!empty($schema_changes[$change_type])) |
| 51 | { |
| 52 | foreach ($schema_changes[$change_type] as $key => $value) |
| 53 | { |
| 54 | if ($data_depth === 1) |
| 55 | { |
| 56 | $steps[] = array( |
| 57 | 'dbtools.perform_schema_changes', array(array( |
| 58 | $change_type => array( |
| 59 | (!is_int($key)) ? $key : 0 => $value, |
| 60 | ), |
| 61 | )), |
| 62 | ); |
| 63 | } |
| 64 | else if ($data_depth === 2) |
| 65 | { |
| 66 | foreach ($value as $key2 => $value2) |
| 67 | { |
| 68 | $steps[] = array( |
| 69 | 'dbtools.perform_schema_changes', array(array( |
| 70 | $change_type => array( |
| 71 | $key => array( |
| 72 | $key2 => $value2, |
| 73 | ), |
| 74 | ), |
| 75 | )), |
| 76 | ); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return $steps; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Reverse the update steps from an array of data changes |
| 88 | * |
| 89 | * 'If' statements and custom methods will be skipped, for all |
| 90 | * other calls the reverse method of the tool class will be called |
| 91 | * |
| 92 | * @param array $steps Update changes from migration |
| 93 | * |
| 94 | * @return array |
| 95 | */ |
| 96 | public function reverse_update_data($steps) |
| 97 | { |
| 98 | $reversed_array = array(); |
| 99 | |
| 100 | foreach ($steps as $step) |
| 101 | { |
| 102 | $parts = explode('.', $step[0]); |
| 103 | $parameters = $step[1]; |
| 104 | |
| 105 | $class = $parts[0]; |
| 106 | $method = isset($parts[1]) ? $parts[1] : false; |
| 107 | |
| 108 | if ($class !== 'if' && $class !== 'custom') |
| 109 | { |
| 110 | array_unshift($parameters, $method); |
| 111 | $reversed_array[] = array($class . '.reverse', $parameters); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return array_reverse($reversed_array); |
| 116 | } |
| 117 | } |