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<?php // $Id: datasetitems.php,v 1.3.2.1 2006/06/05 16:56:31 tjhunt Exp $
// Allows a teacher to create, edit and delete datasets
// Set up strings
$strdatasetnumber = get_string("datasetnumber", "quiz");
$strnumberinfo = get_string("categoryinfo", "quiz");
$strquestions = get_string("questions", "quiz");
$strpublish = get_string("publish", "quiz");
$strdelete = get_string("remove", "quiz");
$straction = get_string("action");
$stradd = get_string("add");
$strcancel = get_string("cancel");
$strsavechanges = get_string("savechanges");
$strbacktoquiz = get_string("backtoquiz", "quiz");
$streditingquiz = get_string("editingquiz", "quiz");
$streditdatasets = get_string("editdatasets", "quiz");
$strreuseifpossible = get_string('reuseifpossible', 'quiz');
$strforceregeneration = get_string('forceregeneration', 'quiz');
$strdataitemneed = get_string('dataitemneed', 'quiz');
if (empty($question->id)) {
$datasetdefs = $this->get_dataset_definitions(
$SESSION->datasetdependent->definitionform);
} else {
if (empty($question->options)) {
$this->get_question_options($question);
}
$datasetdefs = $this->get_dataset_definitions($form);
}
// Handle generator options...
$olddatasetdefs = fullclone($datasetdefs); // Completely deep copy the array of objects
$datasetdefs = $this->update_dataset_options($olddatasetdefs, $form);
$maxnumber = -1;
$datasets = empty($form->dataset) ? $form->definition : $form->dataset;
foreach ($datasetdefs as $defid => $datasetdef) {
if (isset($datasetdef->id)
&& $datasetdef->options != $olddatasetdefs[$defid]->options) {
// Save the new value for options
update_record('question_dataset_definitions', $datasetdef);
}
// Get maxnumber
if ($maxnumber == -1 || $datasetdef->itemcount < $maxnumber) {
$maxnumber = $datasetdef->itemcount;
}
}
// Handle adding and removing of dataset items
// This twisted condition should effectively stop resubmits caused by reloads
if (isset($form->addbutton) && $maxnumber + 1 == $form->numbertoadd) {
$addeditem->number = $form->numbertoadd;
foreach ($form->definition as $key => $defid) {
$addeditem->definition = $datasetdefs[$defid]->id;
$addeditem->value = $form->value[$key];
if ($form->itemid[$key]) {
// Reuse an previously used record
$addeditem->id = $form->itemid[$key];
if (!update_record('question_dataset_items', $addeditem)) {
error("Error: Unable to update dataset item");
}
} else {
unset($addeditem->id);
if (!insert_record('question_dataset_items', $addeditem)) {
error("Error: Unable to insert dataset item");
}
}
foreach ($datasetdefs as $key => $newdef) {
if (isset($newdef->id) && $newdef->itemcount <= $maxnumber) {
$newdef->itemcount = $maxnumber+1;
// Save the new value for options
update_record('question_dataset_definitions', $newdef);
}
}
}
// else Success:
$maxnumber = $addeditem->number;
} else if (isset($form->deletebutton)
&& $maxnumber == $form->numbertodelete) {
// Simply decrease itemcount where == $maxnumber
foreach ($datasetdefs as $datasetdef) {
if ($datasetdef->itemcount == $maxnumber) {
$datasetdef->itemcount--;
if (!update_record('question_dataset_definitions',
$datasetdef)) {
error("Error: Unable to update itemcount");
}
}
}
--$maxnumber;
}
make_upload_directory("$course->id"); // Just in case
$grosscoursefiles = get_directory_list("$CFG->dataroot/$course->id",
"$CFG->moddata");
// Have $coursefiles indexed by file paths:
$coursefiles = array();
foreach ($grosscoursefiles as $coursefile) {
$coursefiles[$coursefile] = $coursefile;
}
// Generate a new dataset item (or reuse an old one)
foreach ($datasetdefs as $defid => $datasetdef) {
if (isset($datasetdef->id)) {
$datasetdefs[$defid]->items = get_records_sql( // Use number as key!!
" SELECT number, definition, id, value
FROM {$CFG->prefix}question_dataset_items
WHERE definition = $datasetdef->id ");
}
if (isset($datasetdefs[$defid]->items[$maxnumber + 1]) && (
empty($form->forceregeneration) &&
isset($form->regenerateddefid) &&
$form->regenerateddefid != $defid ||
isset($form->deletebutton))) {
// Reuse existing datasets
} else {
$datasetitem = new stdClass;
$datasetitem->id =
isset($datasetdefs[$defid]->items[$maxnumber + 1]->id)
? $datasetdefs[$defid]->items[$maxnumber + 1]->id : '';
$datasetitem->number = $maxnumber + 1;
if ($this->supports_dataset_item_generation()) {
if (!empty($form->addbutton) || // If we added an item
!isset($form->value) || // If we don't have a value
$form->regenerateddefid == $defid) { // If we explicitly ask for regeneration
$datasetitem->value =
$this->generate_dataset_item($datasetdef->options);
} else {
$definition = array_flip($form->definition);
$datasetitem->value = $form->value[$definition[$defid]];
}
} else {
$datasetitem->value = '';
}
$datasetdefs[$defid]->items[$maxnumber + 1] = clone($datasetitem);
}
}
// Get question header if any
$strquestionheader = $this->comment_header($question);
// Set up the table with the controls for creating new dataset items
$table->head = $addtable->head = array($straction, $strdatasetnumber);
$addtable->align = array("center", "center");
$forceregeneration = '';
if ($this->supports_dataset_item_generation()) {
$force = $reuse = '';
empty($form->forceregeneration)
? $reuse = ' checked="checked" '
: $force = ' checked="checked" ';
$forceregeneration = '<br/><input type="radio" name="forceregeneration" '
. $reuse . ' value="0"/>' . $strreuseifpossible
. '<br/><input type="radio" name="forceregeneration" value="1" '
. $force . ' />' . $strforceregeneration;
}
$addline[] = '<input type="hidden" name="numbertoadd" value="'.
($maxnumber+1).'"/><input type="submit" name="addbutton" '.
'value="'.$stradd.'"/>'.$forceregeneration;
$addline[] = $maxnumber+1;
foreach ($datasetdefs as $defid => $datasetdef) {
if ($datasetdef->name) {
$table->head[] = $datasetdef->name;
$addtable->head[] = $datasetdef->name
. ($this->supports_dataset_item_generation()
? '<br/>' . $this->custom_generator_tools($datasetdef)
: '');
//$table->align[] = "center";
if (isset($datasetdef->items[$maxnumber + 1]->id)) {
$itemid = $datasetdef->items[$maxnumber + 1]->id;
} else {
$itemid = '';
}
$addline[] =
'<input type="hidden" name="itemid[]" value="'.$itemid.'"/>'
. "<input type=\"hidden\" name=\"definition[]\" value=\"$defid\"/>"
. ( 2 != $datasetdef->type
? '<input type="text" size="20" name="value[]" value="'
. $datasetdef->items[$maxnumber + 1]->value
. '"/>'
: choose_from_menu($coursefiles, 'value[]',
$datasetdef->items[$maxnumber + 1]->value,
'', '', '', true));
$data[$datasetdef->name] = $datasetdef->items[$maxnumber + 1]->value;
}
}
if ($strquestionheader) {
$table->head[] = $strquestionheader;
$addtable->head[] = $strquestionheader;
if (empty($question->id) &&
isset($SESSION->datasetdependent->questionform)) {
$tmp = &$SESSION->datasetdependent->questionform;
$answers = array();
foreach ($tmp->answers as $key => $val) {
$answers[$key]->answer = $tmp->answers[$key];
$answers[$key]->tolerance = $tmp->tolerance[$key];
$answers[$key]->tolerancetype = $tmp->tolerancetype[$key];
$answers[$key]->correctanswerlength = $tmp->correctanswerlength[$key];
$answers[$key]->correctanswerformat = $tmp->correctanswerformat[$key];
}
$question->options->answers = $answers;
}
$addline[] = $this->comment_on_datasetitems($question, $data, $maxnumber + 1);
}
// Set up the table showing existing datasets
$table->data = array();
$table->align = $addtable->align;
for ($number = $maxnumber ; $number > 0 ; --$number) {
$columns = array();
if ($maxnumber == $number) {
$columns[] =
"<input type=\"hidden\" name=\"numbertodelete\" value=\"$number\"/>
<input type=\"submit\" name=\"deletebutton\" value=\"$strdelete\"/>";
} else {
$columns[] = '';
}
$columns[] = $number;
foreach ($datasetdefs as $defid => $datasetdef) {
$columns[] =
'<input type="hidden" name="itemid[]" value="'. $datasetdef->items[$number]->id .'"/>'
. "<input type=\"hidden\" name=\"number[]\" value=\"$number\"/>
<input type=\"hidden\" name=\"definition[]\" value=\"$defid\"/>"
. // Set $data:
($data[$datasetdef->name] = $datasetdef->items[$number]->value) ;
}
if ($strquestionheader) {
$columns[] = $this->comment_on_datasetitems($question, $data, $number);
}
$table->data[] = $columns;
}
/// Print heading
print_heading_with_help($streditdatasets, 'questiondatasets', "quiz");
// Print the new-dataset table
$addtable->data = array($addline);
echo "<form name=\"addform\" method=\"post\" action=\"question.php\">
<input type=\"hidden\" name=\"regenerateddefid\" value=\"0\"/>
<input type=\"hidden\" name=\"id\" value=\"$question->id\"/>
<input type=\"hidden\" name=\"category\" value=\"$question->category\"/>
<input type=\"hidden\" name=\"qtype\" value=\"$question->qtype\"/>
<input type=\"hidden\" name=\"sesskey\" value=\"".sesskey()."\"/>
<input type=\"hidden\" name=\"wizardpage\" value=\"datasetitems\"/>";
print_table($addtable);
echo '</form>';
// <input type=\"hidden\" name=\"editdatasets\" value=\"1\"/>
// Print the existing-datasets table
if (!empty($table->data)) {
echo "<form method=\"post\" action=\"question.php\">
<input type=\"hidden\" name=\"id\" value=\"$question->id\"/>
<input type=\"hidden\" name=\"category\" value=\"$question->category\"/>
<input type=\"hidden\" name=\"qtype\" value=\"$question->qtype\"/>
<input type=\"hidden\" name=\"sesskey\" value=\"".sesskey()."\"/>
<input type=\"hidden\" name=\"wizardpage\" value=\"datasetitems\"/>";
print_table($table);
echo '</form>';
echo "<center><br /><br /><form method=\"post\" action=\"question.php\">
<input type=\"hidden\" name=\"id\" value=\"$question->id\"/>
<input type=\"hidden\" name=\"category\" value=\"$question->category\"/>
<input type=\"hidden\" name=\"qtype\" value=\"$question->qtype\"/>
<input type=\"hidden\" name=\"sesskey\" value=\"".sesskey()."\"/>
<input type=\"hidden\" name=\"wizardpage\" value=\"datasetitems\"/>
<input type=\"submit\" name=\"backtoquiz\" value=\"$strbacktoquiz\">
</form></center>\n";
} else {
notify( $strdataitemneed );
}
?>
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