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|
<?php // $Id: format.php,v 1.6 2006/04/10 22:10:34 gustav_delius Exp $
////////////////////////////////////////////////////////////////////
/// Class for importing course test manager questions. //
/// //
/// //
////////////////////////////////////////////////////////////////////
// Based on format.php, included by ../../import.php
require_once($CFG->dirroot.'/lib/uploadlib.php');
class qformat_coursetestmanager extends qformat_default {
function provide_import() {
return true;
}
function importpreprocess($category) {
$this->category = $category; // Important
return true;
}
function importprocess($filename) {
global $CFG,$strimportquestions,$form,$question_category,$category,$course,
$hostname, $mdapath, $mdbpath;
if ((PHP_OS == "Linux") and isset($hostname)) {
$hostname = trim($hostname);
// test the ODBC socket server connection
// if failure, unset hostname and set hostname_access_error
$question_categories = $this->getquestioncategories($mdbpath, $mdapath, $hostname);
if (!$question_categories) {
$hostname_access_error = $hostname . " ";
unset($hostname);
} else {
$hostname_access_error = 0;
}
}
if ((PHP_OS == "Linux") and !isset($hostname)) {
// copy the file to a semi-permanent location
if (! $basedir = make_upload_directory("$course->id")) {
error("The site administrator needs to fix the file permissions for the data directory");
}
if (!isset($hostname_access_error)) {
$bname=basename($filename);
$cleanfilename = clean_filename($bname);
if ($cleanfilename) {
$newfile = "$basedir/$cleanfilename";
if (move_uploaded_file($filename, $newfile)) {
chmod($newfile, 0666);
clam_log_upload($newfile,$course);
} else {
notify(get_string("uploadproblem", "", $filename));
}
}
$filename = $newfile;
}
print_heading_with_help($strimportquestions, "import", "quiz");
print_simple_box_start("center");
if ($hostname_access_error) { notify("couldn't connect to ODBC Socket Server on " . $hostname_access_error); }
echo "<form method=\"post\" action=\"import.php\">";
echo "<table cellpadding=\"5\">";
echo "<tr><td align=\"right\">";
echo "What is the hostname or IP address of the ODBC Socket Server:</td><td>";
echo " <input name=\"hostname\" type=\"text\" size=\"50\" value=\"".stripslashes($hostname_access_error)."\" />";
echo " <input name=\"filename\" type=\"hidden\" value=\"".$filename."\" />";
echo " <input name=\"category\" type=\"hidden\" value=\"".$category->id."\" />";
echo " <input name=\"format\" type=\"hidden\" value=\"".$form->format."\" />";
echo "</td><td> </td></tr>";
echo "<tr><td align=\"right\">";
echo "What is the location of the database (.mdb file) on the Socket Server:</td><td>";
echo " <input name=\"mdbpath\" type=\"text\" size=\"50\" value=\"".stripslashes($mdbpath)."\" />";
echo "</td><td> </td></tr>";
echo "<tr><td align=\"right\">";
echo "What is the location of the system database (System.mda file) on the Socket Server:</td><td>";
echo " <input name=\"mdapath\" type=\"text\" size=\"50\" value=\"".stripslashes($mdapath)."\" />";
echo "</td><td> </td></tr>";
echo "<tr><td> </td><td>";
echo " <input type=\"submit\" name=\"save\" value=\"Connect to Server\" />";
echo "</td></tr>";
echo "</table>";
echo "</form>";
print_simple_box_end();
print_footer($course);
exit;
}
// we get here if running windows or after connect to ODBC socket server on linux
//
// this generates the page to choose categories of questions to import
//
if (!isset($question_category)) {
if (PHP_OS == "WINNT") {
// copy the file to a semi-permanent location
if (! $basedir = make_upload_directory("$course->id")) {
error("The site administrator needs to fix the file permissions for the data directory");
}
$bname=basename($filename);
$cleanfilename = clean_filename($bname);
if ($cleanfilename) {
$newfile = "$basedir/$cleanfilename";
if (move_uploaded_file($filename, $newfile)) {
chmod($newfile, 0666);
clam_log_upload($newfile,$course);
} else {
notify(get_string("uploadproblem", "", $filename));
}
}
$filename = $newfile;
}
// end of file copy
// don't have to do this on linux, since it's alreay been done in the test above
if (PHP_OS == "WINNT") { $question_categories = $this->getquestioncategories($filename); }
// print the intermediary form
if (!$categories = question_category_menu($course->id, true)) {
error("No categories!");
}
print_heading_with_help($strimportquestions, "import", "quiz");
print_simple_box_start("center");
echo "<form method=\"post\" action=\"import.php\">";
echo "<table cellpadding=\"5\">";
echo "<tr><td align=\"right\">";
echo "Choose a category of questions to import:</td><td>";
asort($question_categories);
choose_from_menu($question_categories, "question_category","All Categories","All Categories", "", "allcategories");
echo " <input name=\"filename\" type=\"hidden\" value=\"".$filename."\" />";
echo " <input name=\"category\" type=\"hidden\" value=\"".$category->id."\" />";
echo " <input name=\"format\" type=\"hidden\" value=\"".$form->format."\" />";
if (PHP_OS == "Linux") {
echo " <input name=\"hostname\" type=\"hidden\" value=\"".stripslashes(trim($hostname))."\" />";
echo " <input name=\"mdbpath\" type=\"hidden\" value=\"".stripslashes($mdbpath)."\" />";
echo " <input name=\"mdapath\" type=\"hidden\" value=\"".stripslashes($mdapath)."\" />";
}
echo "</td><td> </td>";
echo "</tr><tr><td> </td><td>";
echo " <input type=\"submit\" name=\"save\" value=\"Import Questions\" />";
echo "</td></tr>";
echo "</table>";
echo "</form>";
print_simple_box_end();
print_footer($course);
exit;
}
//
// this is the main import section
//
notify("Importing questions");
if (PHP_OS == "Linux") {
$hostname = trim($hostname);
$records = $this->getquestions($mdbpath,$question_category,$mdapath, $hostname);
} else {
$records = $this->getquestions($filename,$question_category);
}
foreach ($records as $qrec)
{
$question = $this->defaultquestion();
if ($qrec[9] != "") {
$question->image = $qrec[9];
}
// 0 Selected
// 1 PracticeTestOK?
// 2 QuestionText
// 3 QuestionType
// 4 Option1Text
// 5 Option2Text
// 6 Option3Text
// 7 Option4Text
// 8 CorrectAnswer
// 9 Graphic
// 10 Module
// 11 ChapterNumber
// 12 PageNumber
$ref = "Answer can be found in chapter ". $qrec[11] . ", page " . $qrec[12] . ".";
switch ($qrec[3]) {
case 1:
$question->qtype = MULTICHOICE; // MULTICHOICE, SHORTANSWER, TRUEFALSE
// echo "<pre>";echo htmlspecialchars($qrec[2]); echo "</pre>";
$question->questiontext = addslashes(trim($qrec[2]));
// echo "<pre>";echo $question->questiontext; echo "</pre>";
$question->name = preg_replace("/<br />/", "", $question->questiontext);
$question->single = 1; // Only one answer is allowed -- used for multiple choicers
$fractionset = 0;
for ($i=4;$i<=7;$i++) {
if ($qrec[$i] != "") {
$question->answer[$i-3]=addslashes($qrec[$i]);
if ($qrec[8] == $i-3) { // if this is the index of CorrectAnswer
$question->fraction[$i-3] = 1;
$fractionset = 1;
} else {
$question->fraction[$i-3] = 0;
}
$question->feedback[$i-3] = (($qrec[8] == $i-3)?"Correct. ":"Incorrect. ") . $ref;
}
}
if ($fractionset == 0) { $question->fraction[1] = 1; }
break;
case 2: // TRUE FALSE
$question->qtype = TRUEFALSE;
$question->questiontext = addslashes(trim($qrec[2]));
$question->name = preg_replace("/<br />/", "", $question->questiontext);
// for TF, $question->answer should be 1 for true, 0 for false
if ($qrec[8] == "T") { $question->answer =1;} else { $question->answer = 0; }
// for TF, use $question->feedbacktrue and feedbackfalse
$question->feedbacktrue = (($qrec[8] =="T")?"Correct. ":"Incorrect. ") . $ref;
$question->feedbackfalse = (($qrec[8] =="F")?"Correct. ":"Incorrect. ") . $ref;
break;
case 3:
$question->qtype = SHORTANSWER;
$question->questiontext = addslashes(trim($qrec[2]));
// echo "<pre>";echo $question->questiontext; echo "</pre>";
$question->name = preg_replace("/<br />/", "", $question->questiontext);
$question->usecase=0; // Ignore case -- for SHORT ANSWER questions
$answers = explode("~", $qrec[8]);
$question->answer[0]=" ";
$question->fraction[0]=1;
for ($i=0;$i<count($answers);$i++) {
$question->answer[$i] = addslashes(trim($answers[$i]));
$question->feedback[$i] = $ref;
$question->fraction[$i] = 1; // 1 for 100%, 0 for none or somewhere in between
}
break;
case 4:
$question = 0;
notify("Cannot use essay questions - skipping question ". $qrec[2] . " " . $ref);
break;
default:
$question = 0;
notify("Misformatted Record. Question Skipped.");
break;
}
if ($question) { $questions[] = $question; }
}
$count = 0;
// process all the questions
if (PHP_OS == "WINNT") {
$filename = str_replace("\\\\","\\",$filename);
$filename = str_replace("/","\\",$filename);
}
foreach ($questions as $question) { // Process and store each question
$count++;
echo "<hr /><p><b>$count</b>. ".stripslashes($question->questiontext)."</p>";
$question->category = $this->category->id;
$question->stamp = make_unique_id_code(); // Set the unique code (not to be changed)
if (!$question->id = insert_record("question", $question)) {
error("Could not insert new question!");
}
$this->questionids[] = $question->id;
// Now to save all the answers and type-specific options
$result = save_question_options($question);
if (!empty($result->error)) {
notify($result->error);
$this->deletedatabase($filename);
return false;
}
if (!empty($result->notice)) {
notify($result->notice);
$this->deletedatabase($filename);
return true;
}
// Give the question a unique version stamp determined by question_hash()
set_field('question', 'version', question_hash($question), 'id', $question->id);
}
$this->deletedatabase($filename);
return true;
}
function importpostprocess() {
return true;
}
function deletedatabase($filename) {
if (! $this->fulldelete($filename)) {
echo "<br />Error: Could not delete: $filename";
return false;
}
return true;
}
function getquestions($filename, $category, $mdapath="", $hostname="") {
if (($category == "allcategories") or ($category == "")) {
$sql = "SELECT * FROM TBQuestions";
} else {
$sql = "SELECT * FROM TBQuestions where module = '".$category."'";
}
if (PHP_OS == "WINNT") {
$ldb =& $this->connect_win($filename);
$qset = $ldb->Execute("$sql");
if ( $qset->RecordCount() > 0 ) {
$records = $qset->GetAssoc(true);
} else {
$this->err("There were no records in the database.",$dsn);
$ldb->Close();
return false;
}
$ldb->Close();
} else { // if PHP_OS == WINNT
// we have a linux installation
$result = $this->query_linux($sql,$filename, $mdapath,$hostname);
if ( count($result) > 0 ) {
// get rid of the ID field in the first column.
for($i=0;$i<count($result);$i++) {
foreach (array_keys($result[$i]) as $j) {
$records[$i][$j-1] = $result[$i][$j];
}
}
} else {
$this->err("There were no records in the database.",$dsn);
$ldb->Close();
return false;
}
// xml test and connect
} // PHP_OS TEST
return $records;
}
function getquestioncategories($filename, $mdapath="", $hostname="") {
global $CFG, $result;
$sql = "SELECT Distinct module FROM TBQuestions";
if (PHP_OS == "WINNT") {
$ldb =& $this->connect_win($filename);
$qset = $ldb->Execute("$sql");
if ( $qset->RecordCount() > 0 ) {
$records = $qset->GetArray(true);
foreach ($records as $record) {
$categories[$record[0]] = $record[0];
}
} else { // if recordcount
$this->err("There were no records in the database.",$dsn);
$ldb->Close();
return false;
}
$ldb->Close();
} else { // if PHP_OS == WINNT
// we have a linux installation
$result = $this->query_linux($sql, $filename, $mdapath, $hostname);
for($i=0;$i<count($result);$i++) {
$categories[$result[$i][0]] = $result[$i][0];
}
} // PHP_OS TEST
return $categories;
}
function query_linux($sql, $mdbpath, $mdapath, $hostname) {
global $result;
include_once("odbcsocketserver.class.php");
// set up socket server object to connect to remote host
$oTest = new ODBCSocketServer;
//Set the Hostname, port, and connection string
$oTest->sHostName = $hostname;
$oTest->nPort = 9628;
// $oTest->sConnectionString="DRIVER=Microsoft Access Driver (*.mdb);SystemDB=C:\CTM\System.mda;DBQ=C:\CTM\of2K3\ctm.mdb;UID=Assess;PWD=VBMango;";
$oTest->sConnectionString="DRIVER=Microsoft Access Driver (*.mdb);SystemDB=".
$mdapath.";DBQ=".$mdbpath.";UID=Assess;PWD=VBMango;";
// send and receive XML communication
$qResult = $oTest->ExecSQL($sql);
// set up XML parser to read the results
$xml_parser = xml_parser_create("US-ASCII");
xml_set_element_handler($xml_parser, "quiz_xmlstart", "quiz_xmlend");
xml_set_character_data_handler($xml_parser, "quiz_xmldata");
// parse the XML and get back the result set array
if (!xml_parse($xml_parser, $qResult)) {
$this->err("XML error: ".xml_error_string(xml_get_error_code($xml_parser))
." at line ".xml_get_current_line_number($xml_parser),$oTest->sConnectionString);
return false;
} else {
// echo("Successful XML parse. ");
// prepare the array for use in the pull-down
/* echo "<br />count of rows is ". count ($result);
echo "<pre>\n";
$qResult = HtmlSpecialChars($qResult);
echo $qResult;
echo "\n</pre>";
*/
xml_parser_free($xml_parser);
// $sResult = HtmlSpecialChars($qResult);
//echo("<pre>");
// echo($sResult);
// echo("</pre>");
return $result;
}
}
function connect_win($filename) {
global $CFG, $systemdb;
// first, verify the location of System.mda
if (!isset($systemdb)) {
$systemdb=$this->findfile("System.mda");
}
if (! $systemdb) {
$this->err("The system database System.mda cannot be found. Check that you've uploaded it to the course.",$dsn);
die;
}
$ldb = &ADONewConnection('access');
$dsn="DRIVER=Microsoft Access Driver (*.mdb);SystemDB=".$systemdb.";DBQ=".$filename.";UID=Assess;PWD=VBMango;";
$dbconnected = $ldb->Connect($dsn);
if (! $dbconnected) {
$this->err("Moodle could not connect to the database.",$dsn);
die;
}
return $ldb;
}
function err($message, $dsn) {
echo "<font color=\"#990000\">";
echo "<p>Error: $message</p>";
echo "<p>ODBC File DSN: $dsn<br />";
echo "</font>";
}
function fulldelete($location) {
if (is_dir($location)) {
$currdir = opendir($location);
while ($file = readdir($currdir)) {
if ($file <> ".." && $file <> ".") {
$fullfile = $location."/".$file;
if (is_dir($fullfile)) {
if (!fulldelete($fullfile)) {
return false;
}
} else {
if (!unlink($fullfile)) {
return false;
}
}
}
}
closedir($currdir);
if (! rmdir($location)) {
return false;
}
} else {
if (!unlink($location)) {
return false;
}
}
return true;
}
function findfile($filename) {
global $CFG;
$dirs = $this->getcoursedirs();
$dirs[] = $CFG->dirroot."\mod\quiz\format";
foreach ($dirs as $dir) {
$file = $dir . "\System.mda";
// look for System.mda
if (is_file($file)) return $file;
}
return false;
}
function getcoursedirs() {
global $CFG;
// for every course in the system, find the root of the data directory
$courses = get_records_sql("select distinct id,fullname from ".$CFG->prefix."course");
$dirs = array();
if ($courses) {
foreach ($courses as $course) {
$dir = $CFG->dataroot . "/" . $course->id;
if (is_dir($dir)) { $dirs[] = $dir; }
}
}
return $dirs;
}
} // END OF CLASS
//Handler for starting elements
function quiz_xmlstart($parser, $name, $attribs) {
global $result,$row, $col, $incolumn;
$name = strtolower($name);
switch ($name) {
case "row":
$col=0;break;
case "column":
$incolumn = 1;break;
case "error":
break;
case "result":
$row = 0; break;
} // switch
}
//handler for the end of elements
function quiz_xmlend($parser, $name) {
global $result, $row, $col, $incolumn;
$name = strtolower($name);
switch ($name) {
case "row":
$row++;break;
case "column":
$incolumn = 0;
$col++;
break;
case "error":
break;
case "result":
break;
} // switch
} // function
//handler for character data
function quiz_xmldata($parser, $data) {
global $result, $row, $col, $incolumn;
if ($incolumn) { $result[$row][$col] = $result[$row][$col] . $data;
}
}
?>
|
