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<?php
namespace Drupal\Core\Database\Install;
use Drupal\Core\Database\Database;
/**
* Database installer structure.
*
* Defines basic Drupal requirements for databases.
*/
abstract class Tasks {
/**
* The name of the PDO driver this database type requires.
*
* @var string
*/
protected $pdoDriver;
/**
* Structure that describes each task to run.
*
* @var array
*
* Each value of the tasks array is an associative array defining the function
* to call (optional) and any arguments to be passed to the function.
*/
protected $tasks = [
[
'function' => 'checkEngineVersion',
'arguments' => [],
],
[
'arguments' => [
'CREATE TABLE {drupal_install_test} (id int NULL)',
'Drupal can use CREATE TABLE database commands.',
'Failed to <strong>CREATE</strong> a test table on your database server with the command %query. The server reports the following message: %error.<p>Are you sure the configured username has the necessary permissions to create tables in the database?</p>',
TRUE,
],
],
[
'arguments' => [
'INSERT INTO {drupal_install_test} (id) VALUES (1)',
'Drupal can use INSERT database commands.',
'Failed to <strong>INSERT</strong> a value into a test table on your database server. We tried inserting a value with the command %query and the server reported the following error: %error.',
],
],
[
'arguments' => [
'UPDATE {drupal_install_test} SET id = 2',
'Drupal can use UPDATE database commands.',
'Failed to <strong>UPDATE</strong> a value in a test table on your database server. We tried updating a value with the command %query and the server reported the following error: %error.',
],
],
[
'arguments' => [
'DELETE FROM {drupal_install_test}',
'Drupal can use DELETE database commands.',
'Failed to <strong>DELETE</strong> a value from a test table on your database server. We tried deleting a value with the command %query and the server reported the following error: %error.',
],
],
[
'arguments' => [
'DROP TABLE {drupal_install_test}',
'Drupal can use DROP TABLE database commands.',
'Failed to <strong>DROP</strong> a test table from your database server. We tried dropping a table with the command %query and the server reported the following error %error.',
],
],
];
/**
* Results from tasks.
*
* @var array
*/
protected $results = [
'fail' => [],
'pass' => [],
];
/**
* Ensure the PDO driver is supported by the version of PHP in use.
*/
protected function hasPdoDriver() {
return in_array($this->pdoDriver, \PDO::getAvailableDrivers());
}
/**
* Assert test as failed.
*/
protected function fail($message) {
$this->results['fail'][] = $message;
}
/**
* Assert test as a pass.
*/
protected function pass($message) {
$this->results['pass'][] = $message;
}
/**
* Check whether Drupal is installable on the database.
*/
public function installable() {
return $this->hasPdoDriver() && empty($this->error);
}
/**
* Return the human-readable name of the driver.
*/
abstract public function name();
/**
* Return the minimum required version of the engine.
*
* @return
* A version string. If not NULL, it will be checked against the version
* reported by the Database engine using version_compare().
*/
public function minimumVersion() {
return NULL;
}
/**
* Run database tasks and tests to see if Drupal can run on the database.
*
* @return array
* A list of error messages.
*/
public function runTasks() {
// We need to establish a connection before we can run tests.
if ($this->connect()) {
foreach ($this->tasks as $task) {
if (!isset($task['function'])) {
$task['function'] = 'runTestQuery';
}
if (method_exists($this, $task['function'])) {
// Returning false is fatal. No other tasks can run.
if (FALSE === call_user_func_array([$this, $task['function']], $task['arguments'])) {
break;
}
}
else {
$this->fail(t("Failed to run all tasks against the database server. The task %task wasn't found.", ['%task' => $task['function']]));
}
}
}
return $this->results['fail'];
}
/**
* Check if we can connect to the database.
*/
protected function connect() {
try {
// This doesn't actually test the connection.
db_set_active();
// Now actually do a check.
Database::getConnection();
$this->pass('Drupal can CONNECT to the database ok.');
}
catch (\Exception $e) {
$this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', ['%error' => $e->getMessage()]));
return FALSE;
}
return TRUE;
}
/**
* Run SQL tests to ensure the database can execute commands with the current user.
*/
protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
try {
Database::getConnection()->query($query);
$this->pass(t($pass));
}
catch (\Exception $e) {
$this->fail(t($fail, ['%query' => $query, '%error' => $e->getMessage(), '%name' => $this->name()]));
return !$fatal;
}
}
/**
* Check the engine version.
*/
protected function checkEngineVersion() {
// Ensure that the database server has the right version.
if ($this->minimumVersion() && version_compare(Database::getConnection()->version(), $this->minimumVersion(), '<')) {
$this->fail(t("The database server version %version is less than the minimum required version %minimum_version.", ['%version' => Database::getConnection()->version(), '%minimum_version' => $this->minimumVersion()]));
}
}
/**
* Return driver specific configuration options.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* The options form array.
*/
public function getFormOptions(array $database) {
$form['database'] = [
'#type' => 'textfield',
'#title' => t('Database name'),
'#default_value' => empty($database['database']) ? '' : $database['database'],
'#size' => 45,
'#required' => TRUE,
'#states' => [
'required' => [
':input[name=driver]' => ['value' => $this->pdoDriver],
],
],
];
$form['username'] = [
'#type' => 'textfield',
'#title' => t('Database username'),
'#default_value' => empty($database['username']) ? '' : $database['username'],
'#size' => 45,
'#required' => TRUE,
'#states' => [
'required' => [
':input[name=driver]' => ['value' => $this->pdoDriver],
],
],
];
$form['password'] = [
'#type' => 'password',
'#title' => t('Database password'),
'#default_value' => empty($database['password']) ? '' : $database['password'],
'#required' => FALSE,
'#size' => 45,
];
$form['advanced_options'] = [
'#type' => 'details',
'#title' => t('Advanced options'),
'#weight' => 10,
];
$profile = drupal_get_profile();
$db_prefix = ($profile == 'standard') ? 'drupal_' : $profile . '_';
$form['advanced_options']['prefix'] = [
'#type' => 'textfield',
'#title' => t('Table name prefix'),
'#default_value' => empty($database['prefix']) ? '' : $database['prefix'],
'#size' => 45,
'#description' => t('If more than one application will be sharing this database, a unique table name prefix – such as %prefix – will prevent collisions.', ['%prefix' => $db_prefix]),
'#weight' => 10,
];
$form['advanced_options']['host'] = [
'#type' => 'textfield',
'#title' => t('Host'),
'#default_value' => empty($database['host']) ? 'localhost' : $database['host'],
'#size' => 45,
// Hostnames can be 255 characters long.
'#maxlength' => 255,
'#required' => TRUE,
];
$form['advanced_options']['port'] = [
'#type' => 'number',
'#title' => t('Port number'),
'#default_value' => empty($database['port']) ? '' : $database['port'],
'#min' => 0,
'#max' => 65535,
];
return $form;
}
/**
* Validates driver specific configuration settings.
*
* Checks to ensure correct basic database settings and that a proper
* connection to the database can be established.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* An array of driver configuration errors, keyed by form element name.
*/
public function validateDatabaseSettings($database) {
$errors = [];
// Verify the table prefix.
if (!empty($database['prefix']) && is_string($database['prefix']) && !preg_match('/^[A-Za-z0-9_.]+$/', $database['prefix'])) {
$errors[$database['driver'] . '][prefix'] = t('The database table prefix you have entered, %prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', ['%prefix' => $database['prefix']]);
}
return $errors;
}
}