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<?php
/**
* Table utilities.
*/
namespace PhpMyAdmin\SqlParser\Utils;
use PhpMyAdmin\SqlParser\Statements\CreateStatement;
/**
* Table utilities.
*
* @category Statement
*
* @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
*/
class Table
{
/**
* Gets the foreign keys of the table.
*
* @param CreateStatement $statement the statement to be processed
*
* @return array
*/
public static function getForeignKeys($statement)
{
if (empty($statement->fields)
|| (! is_array($statement->fields))
|| (! $statement->options->has('TABLE'))
) {
return array();
}
$ret = array();
foreach ($statement->fields as $field) {
if (empty($field->key) || ($field->key->type !== 'FOREIGN KEY')) {
continue;
}
$columns = array();
foreach ($field->key->columns as $column) {
$columns[] = $column['name'];
}
$tmp = array(
'constraint' => $field->name,
'index_list' => $columns
);
if (! empty($field->references)) {
$tmp['ref_db_name'] = $field->references->table->database;
$tmp['ref_table_name'] = $field->references->table->table;
$tmp['ref_index_list'] = $field->references->columns;
if ($opt = $field->references->options->has('ON UPDATE')) {
$tmp['on_update'] = str_replace(' ', '_', $opt);
}
if ($opt = $field->references->options->has('ON DELETE')) {
$tmp['on_delete'] = str_replace(' ', '_', $opt);
}
// if (($opt = $field->references->options->has('MATCH'))) {
// $tmp['match'] = str_replace(' ', '_', $opt);
// }
}
$ret[] = $tmp;
}
return $ret;
}
/**
* Gets fields of the table.
*
* @param CreateStatement $statement the statement to be processed
*
* @return array
*/
public static function getFields($statement)
{
if (empty($statement->fields)
|| (! is_array($statement->fields))
|| (! $statement->options->has('TABLE'))
) {
return array();
}
$ret = array();
foreach ($statement->fields as $field) {
// Skipping keys.
if (empty($field->type)) {
continue;
}
$ret[$field->name] = array(
'type' => $field->type->name,
'timestamp_not_null' => false
);
if ($field->options) {
if ($field->type->name === 'TIMESTAMP') {
if ($field->options->has('NOT NULL')) {
$ret[$field->name]['timestamp_not_null'] = true;
}
}
if ($option = $field->options->has('DEFAULT')) {
$ret[$field->name]['default_value'] = $option;
if ($option === 'CURRENT_TIMESTAMP') {
$ret[$field->name]['default_current_timestamp'] = true;
}
}
if ($option = $field->options->has('ON UPDATE')) {
if ($option === 'CURRENT_TIMESTAMP') {
$ret[$field->name]['on_update_current_timestamp'] = true;
}
}
if ($option = $field->options->has('AS')) {
$ret[$field->name]['generated'] = true;
$ret[$field->name]['expr'] = $option;
}
}
}
return $ret;
}
}
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