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<?php defined('SYSPATH') OR die('No direct script access.'); |
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class Migration_Actions |
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{ |
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public $up = array(); |
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public $down = array(); |
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private $driver = NULL; |
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static private $patterns = array( |
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'add_columns' => '/^add_(.+)_to_(.+)$/', |
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'remove_columns' => '/^remove_(.+)_from_(.+)$/', |
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'create_table' => '/^create_table_(.+)$/', |
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'drop_table' => '/^drop_table_(.+)$/', |
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'rename_table' => '/^rename_table_(.+)_to_(.+)$/', |
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'rename_column' => '/^rename_(.+)_in_(.+)$/', |
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'change_column' => '/^change_(.+)_in_(.+)$/', |
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); |
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public function __construct(Migration_Driver $driver) |
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{ |
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$this->driver = $driver; |
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} |
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public function parse($string) |
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{ |
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foreach (explode('_also_', $string) as $part) |
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{ |
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foreach (self::$patterns as $method => $pattern) |
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{ |
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if (preg_match($pattern, $part, $matches)) |
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{ |
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call_user_func_array(array($this, $method), array_slice($matches, 1)); |
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break; |
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} |
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} |
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} |
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return $this; |
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} |
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public function template($template) |
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1 |
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{ |
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if ( ! is_file($template)) |
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throw new Migration_Exception("Template file :template does not exist", array($template)); |
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list($this->up, $this->down) = explode('--- DOWN ---', file_get_contents($template)); |
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return $this; |
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} |
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public function add_columns($columns, $table) |
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{ |
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foreach (explode('_and_', $columns) as $column) |
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{ |
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$this->up[] = "\$this->add_column('$table', '$column', '".self::guess_column_type($column)."');"; |
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$this->down[] = "\$this->remove_column('$table', '$column');"; |
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} |
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} |
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2 |
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public function remove_columns($columns, $table) |
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{ |
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foreach (explode('_and_', $columns) as $column) |
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{ |
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$this->up[] = "\$this->remove_column('$table', '$column');"; |
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try |
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{ |
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$field_params = $this->driver->column($column)->load($table); |
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$this->down[] = "\$this->add_column('$table', '$column', ".self::field_params_to_string($field_params).");"; |
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} |
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catch (Migration_Exception $e) |
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{ |
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$this->down[] = "\$this->add_column('$table', '$column', 'string');"; |
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} |
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} |
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} |
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public function create_table($tables) |
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{ |
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foreach (explode('_and_', $tables) as $table_name) |
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{ |
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$this->up[] = "\$this->create_table('{$table_name}', array( ));"; |
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$this->down[] = "\$this->drop_table('{$table_name}');"; |
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} |
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} |
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2 |
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public function drop_table($tables) |
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{ |
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foreach (explode('_and_', $tables) as $table_name) |
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{ |
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$this->up[] = "\$this->drop_table('{$table_name}');"; |
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try |
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{ |
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$table = $this->driver->table($table_name)->load(); |
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$fields = array(); |
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$options = array(); |
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foreach ($table->columns as $name => $field_params) |
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{ |
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$fields[] = "\n\t\t\t'$name' => ".self::field_params_to_string($field_params); |
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} |
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1 |
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foreach($table->options as $name => $option) |
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{ |
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$options[] = "'$name' => '$option'"; |
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} |
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$this->down[] = "\$this->create_table('{$table->name()}', array( ".join(',', $fields)." \n\t\t), array( ".join(',', $options)." )); "; |
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} |
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catch (Migration_Exception $e) |
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{ |
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$this->down[] = "\$this->create_table('{$table_name}', array( ));"; |
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} |
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} |
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} |
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public function rename_table($old_name, $new_name) |
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{ |
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$this->up[] = "\$this->rename_table('$old_name', '$new_name');"; |
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$this->down[] = "\$this->rename_table('$new_name', '$old_name');"; |
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} |
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1 |
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public function rename_column($columns, $table) |
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{ |
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foreach (explode('_and_', $columns) as $column) |
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{ |
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if (preg_match('/^(.+)_to_(.+)$/', $column, $matches)) |
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{ |
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if (count($matches) === 3) |
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{ |
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$old_name = $matches[1]; |
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$new_name = $matches[2]; |
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$this->up[] = "\$this->rename_column('$table', '$old_name', '$new_name');"; |
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$this->down[] = "\$this->rename_column('$table', '$new_name', '$old_name');"; |
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} |
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} |
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} |
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} |
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public function change_column($columns, $table) |
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{ |
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foreach (explode('_and_', $columns) as $column) |
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{ |
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$this->up[] = "\$this->change_column('$table', '$column', '".self::guess_column_type($column)."');"; |
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try |
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{ |
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$field_params = $this->driver->column($column)->load($table); |
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$this->down[] = "\$this->change_column('$table', '$column', ".self::field_params_to_string($field_params).");"; |
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} |
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catch (Migration_Exception $e) |
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{ |
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$this->down[] = "\$this->change_column('$table', '$column', 'string');"; |
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} |
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1 |
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} |
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} |
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static public function field_params_to_string($column) |
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{ |
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$options = array(); |
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foreach ($column->params() as $option_name => $option) |
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{ |
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if ($option) { |
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if (is_array($option)) |
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{ |
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foreach ($option as & $param) |
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{ |
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$param = "'$param'"; |
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} |
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$option = 'array('.join(', ', $option).')'; |
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} |
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elseif (is_bool($option)) |
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{ |
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$option = $option ? 'TRUE' : 'FALSE'; |
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} |
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elseif (is_string($option)) |
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{ |
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$option = "'$option'"; |
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} |
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$options[] = (is_numeric($option_name) ? '' : '"' . $option_name . '" => ') . $option; |
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} |
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} |
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return "array( ".join(', ', $options).')'; |
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} |
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static public function guess_column_type($column) |
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{ |
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if (preg_match('/_id$/', $column)) |
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return 'integer'; |
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if (preg_match('/^(id|position)$/', $column)) |
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return 'integer'; |
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if (preg_match('/(_count|_width|_height|_x|_y)$/', $column)) |
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return 'integer'; |
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2 |
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if (preg_match('/_at$/', $column)) |
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return 'datetime'; |
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2 |
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if (preg_match('/^is_/', $column)) |
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return 'boolean'; |
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if (preg_match('/_on$/', $column)) |
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return 'date'; |
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2 |
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if (preg_match('/^(description|text)$/', $column)) |
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return 'text'; |
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2 |
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return 'string'; |
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} |
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} |
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OpenBuildings /
timestamped-migrations
