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Mini Shell
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<?php
declare(strict_types=1);
namespace PhpMyAdmin\Database;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Message;
use PhpMyAdmin\ResponseRenderer;
use PhpMyAdmin\Template;
use PhpMyAdmin\Util;
use function __;
use function count;
use function explode;
use function htmlspecialchars;
use function in_array;
use function intval;
use function mb_strtoupper;
use function sprintf;
use function str_contains;
use function strtoupper;
use function trim;
/**
* Functions for event management.
*/
class Events
{
/** @var array<string, array<int, string>> */
private $status = [
'query' => ['ENABLE', 'DISABLE', 'DISABLE ON SLAVE'],
'display' => ['ENABLED', 'DISABLED', 'SLAVESIDE_DISABLED'],
];
/** @var array<int, string> */
private $type = ['RECURRING', 'ONE TIME'];
/** @var array<int, string> */
private $interval = [
'YEAR',
'QUARTER',
'MONTH',
'DAY',
'HOUR',
'MINUTE',
'WEEK',
'SECOND',
'YEAR_MONTH',
'DAY_HOUR',
'DAY_MINUTE',
'DAY_SECOND',
'HOUR_MINUTE',
'HOUR_SECOND',
'MINUTE_SECOND',
];
/** @var DatabaseInterface */
private $dbi;
/** @var Template */
private $template;
/** @var ResponseRenderer */
private $response;
/**
* @param DatabaseInterface $dbi DatabaseInterface instance.
* @param Template $template Template instance.
* @param ResponseRenderer $response Response instance.
*/
public function __construct(DatabaseInterface $dbi, Template $template, $response)
{
$this->dbi = $dbi;
$this->template = $template;
$this->response = $response;
}
/**
* Handles editor requests for adding or editing an item
*/
public function handleEditor(): void
{
global $db, $table, $errors, $message;
if (! empty($_POST['editor_process_add']) || ! empty($_POST['editor_process_edit'])) {
$sql_query = '';
$item_query = $this->getQueryFromRequest();
// set by getQueryFromRequest()
if (! count($errors)) {
// Execute the created query
if (! empty($_POST['editor_process_edit'])) {
// Backup the old trigger, in case something goes wrong
$create_item = $this->dbi->getDefinition($db, 'EVENT', $_POST['item_original_name']);
$drop_item = 'DROP EVENT IF EXISTS '
. Util::backquote($_POST['item_original_name'])
. ";\n";
$result = $this->dbi->tryQuery($drop_item);
if (! $result) {
$errors[] = sprintf(
__('The following query has failed: "%s"'),
htmlspecialchars($drop_item)
)
. '<br>'
. __('MySQL said: ') . $this->dbi->getError();
} else {
$result = $this->dbi->tryQuery($item_query);
if (! $result) {
$errors[] = sprintf(
__('The following query has failed: "%s"'),
htmlspecialchars($item_query)
)
. '<br>'
. __('MySQL said: ') . $this->dbi->getError();
// We dropped the old item, but were unable to create
// the new one. Try to restore the backup query
$result = $this->dbi->tryQuery($create_item);
if (! $result) {
$errors = $this->checkResult($create_item, $errors);
}
} else {
$message = Message::success(
__('Event %1$s has been modified.')
);
$message->addParam(
Util::backquote($_POST['item_name'])
);
$sql_query = $drop_item . $item_query;
}
}
} else {
// 'Add a new item' mode
$result = $this->dbi->tryQuery($item_query);
if (! $result) {
$errors[] = sprintf(
__('The following query has failed: "%s"'),
htmlspecialchars($item_query)
)
. '<br><br>'
. __('MySQL said: ') . $this->dbi->getError();
} else {
$message = Message::success(
__('Event %1$s has been created.')
);
$message->addParam(
Util::backquote($_POST['item_name'])
);
$sql_query = $item_query;
}
}
}
if (count($errors)) {
$message = Message::error(
'<b>'
. __(
'One or more errors have occurred while processing your request:'
)
. '</b>'
);
$message->addHtml('<ul>');
foreach ($errors as $string) {
$message->addHtml('<li>' . $string . '</li>');
}
$message->addHtml('</ul>');
}
$output = Generator::getMessage($message, $sql_query);
if ($this->response->isAjax()) {
if ($message->isSuccess()) {
$events = $this->dbi->getEvents($db, $_POST['item_name']);
$event = $events[0];
$this->response->addJSON(
'name',
htmlspecialchars(
mb_strtoupper($_POST['item_name'])
)
);
if (! empty($event)) {
$sqlDrop = sprintf(
'DROP EVENT IF EXISTS %s',
Util::backquote($event['name'])
);
$this->response->addJSON(
'new_row',
$this->template->render('database/events/row', [
'db' => $db,
'table' => $table,
'event' => $event,
'has_privilege' => Util::currentUserHasPrivilege('EVENT', $db),
'sql_drop' => $sqlDrop,
'row_class' => '',
])
);
}
$this->response->addJSON('insert', ! empty($event));
$this->response->addJSON('message', $output);
} else {
$this->response->setRequestStatus(false);
$this->response->addJSON('message', $message);
}
$this->response->addJSON('tableType', 'events');
exit;
}
}
/**
* Display a form used to add/edit a trigger, if necessary
*/
if (
! count($errors)
&& (! empty($_POST['editor_process_add'])
|| ! empty($_POST['editor_process_edit'])
|| (empty($_REQUEST['add_item'])
&& empty($_REQUEST['edit_item'])
&& empty($_POST['item_changetype'])))
) {
return;
}
// FIXME: this must be simpler than that
$operation = '';
$title = '';
$item = null;
$mode = '';
if (! empty($_POST['item_changetype'])) {
$operation = 'change';
}
// Get the data for the form (if any)
if (! empty($_REQUEST['add_item'])) {
$title = __('Add event');
$item = $this->getDataFromRequest();
$mode = 'add';
} elseif (! empty($_REQUEST['edit_item'])) {
$title = __('Edit event');
if (
! empty($_REQUEST['item_name'])
&& empty($_POST['editor_process_edit'])
&& empty($_POST['item_changetype'])
) {
$item = $this->getDataFromName($_REQUEST['item_name']);
if ($item !== null) {
$item['item_original_name'] = $item['item_name'];
}
} else {
$item = $this->getDataFromRequest();
}
$mode = 'edit';
}
$this->sendEditor($mode, $item, $title, $db, $operation);
}
/**
* This function will generate the values that are required to for the editor
*
* @return array Data necessary to create the editor.
*/
public function getDataFromRequest()
{
$retval = [];
$indices = [
'item_name',
'item_original_name',
'item_status',
'item_execute_at',
'item_interval_value',
'item_interval_field',
'item_starts',
'item_ends',
'item_definition',
'item_preserve',
'item_comment',
'item_definer',
];
foreach ($indices as $index) {
$retval[$index] = $_POST[$index] ?? '';
}
$retval['item_type'] = 'ONE TIME';
$retval['item_type_toggle'] = 'RECURRING';
if (isset($_POST['item_type']) && $_POST['item_type'] === 'RECURRING') {
$retval['item_type'] = 'RECURRING';
$retval['item_type_toggle'] = 'ONE TIME';
}
return $retval;
}
/**
* This function will generate the values that are required to complete
* the "Edit event" form given the name of a event.
*
* @param string $name The name of the event.
*
* @return array|null Data necessary to create the editor.
*/
public function getDataFromName($name): ?array
{
global $db;
$retval = [];
$columns = '`EVENT_NAME`, `STATUS`, `EVENT_TYPE`, `EXECUTE_AT`, '
. '`INTERVAL_VALUE`, `INTERVAL_FIELD`, `STARTS`, `ENDS`, '
. '`EVENT_DEFINITION`, `ON_COMPLETION`, `DEFINER`, `EVENT_COMMENT`';
$where = 'EVENT_SCHEMA ' . Util::getCollateForIS() . '='
. "'" . $this->dbi->escapeString($db) . "' "
. "AND EVENT_NAME='" . $this->dbi->escapeString($name) . "'";
$query = 'SELECT ' . $columns . ' FROM `INFORMATION_SCHEMA`.`EVENTS` WHERE ' . $where . ';';
$item = $this->dbi->fetchSingleRow($query);
if (! $item) {
return null;
}
$retval['item_name'] = $item['EVENT_NAME'];
$retval['item_status'] = $item['STATUS'];
$retval['item_type'] = $item['EVENT_TYPE'];
if ($retval['item_type'] === 'RECURRING') {
$retval['item_type_toggle'] = 'ONE TIME';
} else {
$retval['item_type_toggle'] = 'RECURRING';
}
$retval['item_execute_at'] = $item['EXECUTE_AT'];
$retval['item_interval_value'] = $item['INTERVAL_VALUE'];
$retval['item_interval_field'] = $item['INTERVAL_FIELD'];
$retval['item_starts'] = $item['STARTS'];
$retval['item_ends'] = $item['ENDS'];
$retval['item_preserve'] = '';
if ($item['ON_COMPLETION'] === 'PRESERVE') {
$retval['item_preserve'] = " checked='checked'";
}
$retval['item_definition'] = $item['EVENT_DEFINITION'];
$retval['item_definer'] = $item['DEFINER'];
$retval['item_comment'] = $item['EVENT_COMMENT'];
return $retval;
}
/**
* Displays a form used to add/edit an event
*
* @param string $mode If the editor will be used to edit an event
* or add a new one: 'edit' or 'add'.
* @param string $operation If the editor was previously invoked with
* JS turned off, this will hold the name of
* the current operation
* @param array $item Data for the event returned by
* getDataFromRequest() or getDataFromName()
*
* @return string HTML code for the editor.
*/
public function getEditorForm($mode, $operation, array $item)
{
global $db;
if ($operation === 'change') {
if ($item['item_type'] === 'RECURRING') {
$item['item_type'] = 'ONE TIME';
$item['item_type_toggle'] = 'RECURRING';
} else {
$item['item_type'] = 'RECURRING';
$item['item_type_toggle'] = 'ONE TIME';
}
}
return $this->template->render('database/events/editor_form', [
'db' => $db,
'event' => $item,
'mode' => $mode,
'is_ajax' => $this->response->isAjax(),
'status_display' => $this->status['display'],
'event_type' => $this->type,
'event_interval' => $this->interval,
]);
}
/**
* Composes the query necessary to create an event from an HTTP request.
*
* @return string The CREATE EVENT query.
*/
public function getQueryFromRequest()
{
global $errors;
$query = 'CREATE ';
if (! empty($_POST['item_definer'])) {
if (str_contains($_POST['item_definer'], '@')) {
$arr = explode('@', $_POST['item_definer']);
$query .= 'DEFINER=' . Util::backquote($arr[0]);
$query .= '@' . Util::backquote($arr[1]) . ' ';
} else {
$errors[] = __('The definer must be in the "username@hostname" format!');
}
}
$query .= 'EVENT ';
if (! empty($_POST['item_name'])) {
$query .= Util::backquote($_POST['item_name']) . ' ';
} else {
$errors[] = __('You must provide an event name!');
}
$query .= 'ON SCHEDULE ';
if (! empty($_POST['item_type']) && in_array($_POST['item_type'], $this->type)) {
if ($_POST['item_type'] === 'RECURRING') {
if (
! empty($_POST['item_interval_value'])
&& ! empty($_POST['item_interval_field'])
&& in_array($_POST['item_interval_field'], $this->interval)
) {
$query .= 'EVERY ' . intval($_POST['item_interval_value']) . ' ';
$query .= $_POST['item_interval_field'] . ' ';
} else {
$errors[] = __('You must provide a valid interval value for the event.');
}
if (! empty($_POST['item_starts'])) {
$query .= "STARTS '"
. $this->dbi->escapeString($_POST['item_starts'])
. "' ";
}
if (! empty($_POST['item_ends'])) {
$query .= "ENDS '"
. $this->dbi->escapeString($_POST['item_ends'])
. "' ";
}
} else {
if (! empty($_POST['item_execute_at'])) {
$query .= "AT '"
. $this->dbi->escapeString($_POST['item_execute_at'])
. "' ";
} else {
$errors[] = __('You must provide a valid execution time for the event.');
}
}
} else {
$errors[] = __('You must provide a valid type for the event.');
}
$query .= 'ON COMPLETION ';
if (empty($_POST['item_preserve'])) {
$query .= 'NOT ';
}
$query .= 'PRESERVE ';
if (! empty($_POST['item_status'])) {
foreach ($this->status['display'] as $key => $value) {
if ($value == $_POST['item_status']) {
$query .= $this->status['query'][$key] . ' ';
break;
}
}
}
if (! empty($_POST['item_comment'])) {
$query .= "COMMENT '" . $this->dbi->escapeString($_POST['item_comment']) . "' ";
}
$query .= 'DO ';
if (! empty($_POST['item_definition'])) {
$query .= $_POST['item_definition'];
} else {
$errors[] = __('You must provide an event definition.');
}
return $query;
}
public function getEventSchedulerStatus(): bool
{
$state = (string) $this->dbi->fetchValue('SHOW GLOBAL VARIABLES LIKE \'event_scheduler\'', 1);
return strtoupper($state) === 'ON' || $state === '1';
}
/**
* @param string|null $createStatement Query
* @param array $errors Errors
*
* @return array
*/
private function checkResult($createStatement, array $errors)
{
// OMG, this is really bad! We dropped the query,
// failed to create a new one
// and now even the backup query does not execute!
// This should not happen, but we better handle
// this just in case.
$errors[] = __('Sorry, we failed to restore the dropped event.') . '<br>'
. __('The backed up query was:')
. '"' . htmlspecialchars((string) $createStatement) . '"<br>'
. __('MySQL said: ') . $this->dbi->getError();
return $errors;
}
/**
* Send editor via ajax or by echoing.
*
* @param string $mode Editor mode 'add' or 'edit'
* @param array|null $item Data necessary to create the editor
* @param string $title Title of the editor
* @param string $db Database
* @param string $operation Operation 'change' or ''
*/
private function sendEditor($mode, ?array $item, $title, $db, $operation): void
{
if ($item !== null) {
$editor = $this->getEditorForm($mode, $operation, $item);
if ($this->response->isAjax()) {
$this->response->addJSON('message', $editor);
$this->response->addJSON('title', $title);
} else {
echo "\n\n<h2>" . $title . "</h2>\n\n" . $editor;
unset($_POST);
}
exit;
}
$message = __('Error in processing request:') . ' ';
$message .= sprintf(
__('No event with name %1$s found in database %2$s.'),
htmlspecialchars(Util::backquote($_REQUEST['item_name'])),
htmlspecialchars(Util::backquote($db))
);
$message = Message::error($message);
if ($this->response->isAjax()) {
$this->response->setRequestStatus(false);
$this->response->addJSON('message', $message);
exit;
}
echo $message->getDisplay();
}
public function export(): void
{
global $db;
if (empty($_GET['export_item']) || empty($_GET['item_name'])) {
return;
}
$itemName = $_GET['item_name'];
$exportData = $this->dbi->getDefinition($db, 'EVENT', $itemName);
if (! $exportData) {
$exportData = false;
}
$itemName = htmlspecialchars(Util::backquote($itemName));
if ($exportData !== false) {
$exportData = htmlspecialchars(trim($exportData));
$title = sprintf(__('Export of event %s'), $itemName);
if ($this->response->isAjax()) {
$this->response->addJSON('message', $exportData);
$this->response->addJSON('title', $title);
exit;
}
$output = '<div class="container">';
$output .= '<h2>' . $title . '</h2>';
$output .= '<div class="card"><div class="card-body">';
$output .= '<textarea rows="15" class="form-control">' . $exportData . '</textarea>';
$output .= '</div></div></div>';
$this->response->addHTML($output);
return;
}
$message = sprintf(
__('Error in processing request: No event with name %1$s found in database %2$s.'),
$itemName,
htmlspecialchars(Util::backquote($db))
);
$message = Message::error($message);
if ($this->response->isAjax()) {
$this->response->setRequestStatus(false);
$this->response->addJSON('message', $message);
exit;
}
$this->response->addHTML($message->getDisplay());
}
}
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