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validateTask.inc.php
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validateTask.inc.php
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<?php
session_start();
/**
* @package SqlValidator
* @author Christian Steusloff
* @author Jens Wiemann
*/
require_once("lib/define.inc.php");
require_once("lib/sqlConnection.class.php");
require_once("lib/oracleConnection.class.php");
require_once("lib/sqlValidator.class.php");
require_once("lib/taskHelper.php");
require_once("lib/queryTranslator.class.php");
require_once("lib/sqlFormatter.php");
$db = new oracleConnection();
$master = new oracleConnection();
$slave = new oracleConnection();
$qT = new queryTranslator();
$task_id = $_POST["taskid"];
$task = new taskHelper($db);
$task->loadTask($_POST["taskid"], $_SESSION["id"]);
$_POST["sql"] = $task->clearQuery($_POST["sql"]);
// this query has wrong names of table , at this time only check the allow statement type
$slave->setQuery($_POST["sql"]);
// format user input
$formattedQueryInput = SqlFormatter::format($_POST["sql"], false);
// SQL Query to correct format
$task->saveLastUserQuery($formattedQueryInput);
// check permission
$allow = ($slave->getStatementType() == $task->getTaskType());
if (!$allow) {
// set error-message
$_SESSION["error"] = $slave->getStatementType($_POST["sql"]) . " not allowed by this task";
session_write_close();
header("LOCATION: viewTask.php?id=" . $_POST["taskid"]);
// stop task
die();
}
// check Syntax-Error
$slave->setSavePoint();
if($slave->getStatementType() == "CREATE"){
// delete exist table for syntax check
foreach($task->getTableNames() as $table){
$slave->setQuery("DROP TABLE ".str_replace("MASTER_","",$table));
@$slave->executeNoCommit();
}
}
// to default table NOT user-table
$slave->setQuery($formattedQueryInput);
// CREATE would commit by oracle
@$slave->executeNoCommit();
if($slave->getStatementType() == "CREATE"){
$sql = "DROP TABLE ".$task->getTableNameFromCreate($formattedQueryInput);
$db->setQuery($sql);
$db->execute();
}
$_SESSION["error"] = $slave->getErrortext();
if (!empty($_SESSION["error"])) {
// get correct position in formatted query
$pos = $task->getErrorPositionInFormattedQuery($formattedQueryInput, $slave->getErrorPosition());
$_SESSION["error"] .= "<br>Error in row: " . $pos["row"] . " column: " . $pos["column"];
$_SESSION["error"] .= !empty($pos["word"]) ? " by <b>" . $pos["word"] . "</b>" : "";
}
$slave->rollbackSavePoint();
if (empty($_SESSION["error"])) {
// USER-solution without prefix
$queryTry = $_POST["sql"];
// to correct table
if($slave->getStatementType() == "CREATE"){
$tab = $task->getTableNameFromCreate($queryTry);
$querySlave = str_replace($tab,"user" . $_SESSION["id"] . "_".$tab,strtoupper($queryTry));
// set master solution query
$table = $task->getTableNames();
$table = $table[0];
// create Query (Master-Solution with prefix from exist table)
$queryCreate = "SELECT DBMS_METADATA.GET_DDL('TABLE','".$table."') createQuery FROM dual";
$master->setQuery($queryCreate);
$master->execute();
$master->Fetch();
// Master-Solution with prefix
$queryMaster = $master->row['CREATEQUERY']->load();
} else {
$querySlave = $qT->translate($queryTry, "user" . $_SESSION["id"] . "_");
// Master-Solution without prefix
$querySolution = $task->getSolution();
// to correct table
$queryMaster = $qT->translate($querySolution, ADMIN_TAB_PREFIX);
}
// slave connection with user-query
$slave->setQuery($querySlave);
// master connection with solution-query
$master->setQuery($queryMaster);
// save query by user
$_SESSION["userquery"] = $querySlave;
$validator = new sqlValidator($master, $slave, $task);
if ($validator->validate()) {
$_SESSION["correct"] = true;
$task->saveCorrectUserQuery(SqlFormatter::format($_POST["sql"], false));
} else {
$_SESSION["valid"] = $validator->getMistake();
}
}
session_write_close();
header("LOCATION: viewTask.php?id=" . $_POST["taskid"] . "#end");