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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Extend the base assignment class for assignments where you upload a single file
*
* @package mod-assignment
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once($CFG->dirroot.'/mod/assignment/lib.php');
require_once(dirname(__FILE__).'/upload_form.php');
class assignment_uploadsingle extends assignment_base {
function print_student_answer($userid, $return=false){
global $CFG, $USER, $OUTPUT;
$fs = get_file_storage();
$browser = get_file_browser();
$output = '';
if ($submission = $this->get_submission($userid)) {
if ($files = $fs->get_area_files($this->context->id, 'mod_assignment', 'submission', $submission->id, "timemodified", false)) {
foreach ($files as $file) {
$filename = $file->get_filename();
$found = true;
$mimetype = $file->get_mimetype();
$path = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.$this->context->id.'/mod_assignment/submission/'.$submission->id.'/'.$filename);
$output .= '<a href="'.$path.'" ><img class="icon" src="'.$OUTPUT->pix_url(file_mimetype_icon($mimetype)).'" alt="'.$mimetype.'" />'.s($filename).'</a><br />';
$output .= plagiarism_get_links(array('userid'=>$userid, 'file'=>$file, 'cmid'=>$this->cm->id, 'course'=>$this->course, 'assignment'=>$this->assignment));
$output .='<br/>';
}
}
}
$output = '<div class="files">'.$output.'</div>';
return $output;
}
function assignment_uploadsingle($cmid='staticonly', $assignment=NULL, $cm=NULL, $course=NULL) {
parent::assignment_base($cmid, $assignment, $cm, $course);
$this->type = 'uploadsingle';
}
function view() {
global $USER, $OUTPUT;
$context = get_context_instance(CONTEXT_MODULE,$this->cm->id);
require_capability('mod/assignment:view', $context);
add_to_log($this->course->id, "assignment", "view", "view.php?id={$this->cm->id}", $this->assignment->id, $this->cm->id);
$this->view_header();
$this->view_intro();
$this->view_dates();
$filecount = false;
if ($submission = $this->get_submission($USER->id)) {
$filecount = $this->count_user_files($submission->id);
if ($submission->timemarked) {
$this->view_feedback();
}
if ($filecount) {
echo $OUTPUT->box($this->print_user_files($USER->id, true), 'generalbox boxaligncenter');
}
}
if (is_enrolled($this->context, $USER, 'mod/assignment:submit') && $this->isopen() && (!$filecount || $this->assignment->resubmit || !$submission->timemarked)) {
$this->view_upload_form();
}
$this->view_footer();
}
function process_feedback() {
if (!$feedback = data_submitted() or !confirm_sesskey()) { // No incoming data?
return false;
}
$userid = required_param('userid', PARAM_INT);
$offset = required_param('offset', PARAM_INT);
$mform = $this->display_submission($offset, $userid, false);
parent::process_feedback($mform);
}
/**
* Counts all complete (real) assignment submissions by enrolled students. This overrides assignment_base::count_real_submissions().
* This is necessary for simple file uploads where we need to check that the numfiles field is greater than zero to determine if a
* submission is complete.
*
* @param int $groupid (optional) If nonzero then count is restricted to this group
* @return int The number of submissions
*/
function count_real_submissions($groupid=0) {
global $DB;
// Grab the context assocated with our course module
$context = get_context_instance(CONTEXT_MODULE, $this->cm->id);
// Get ids of users enrolled in the given course.
list($enroledsql, $params) = get_enrolled_sql($context, 'mod/assignment:view', $groupid);
$params['assignmentid'] = $this->cm->instance;
// Get ids of users enrolled in the given course.
return $DB->count_records_sql("SELECT COUNT('x')
FROM {assignment_submissions} s
LEFT JOIN {assignment} a ON a.id = s.assignment
INNER JOIN ($enroledsql) u ON u.id = s.userid
WHERE s.assignment = :assignmentid AND
s.numfiles > 0", $params);
}
function print_responsefiles($userid, $return=false) {
global $CFG, $USER, $OUTPUT, $PAGE;
$mode = optional_param('mode', '', PARAM_ALPHA);
$offset = optional_param('offset', 0, PARAM_INT);
$output = $OUTPUT->box_start('responsefiles');
$candelete = $this->can_manage_responsefiles();
$strdelete = get_string('delete');
$fs = get_file_storage();
$browser = get_file_browser();
if ($submission = $this->get_submission($userid)) {
$renderer = $PAGE->get_renderer('mod_assignment');
$output .= $renderer->assignment_files($this->context, $submission->id, 'response');
$output .= $OUTPUT->box_end();
}
if ($return) {
return $output;
}
echo $output;
}
function can_manage_responsefiles() {
if (has_capability('mod/assignment:grade', $this->context)) {
return true;
} else {
return false;
}
}
function view_upload_form() {
global $OUTPUT, $USER;
echo $OUTPUT->box_start('uploadbox');
$fs = get_file_storage();
// edit files in another page
if ($submission = $this->get_submission($USER->id)) {
if ($files = $fs->get_area_files($this->context->id, 'mod_assignment', 'submission', $submission->id, "timemodified", false)) {
$str = get_string('editthisfile', 'assignment');
} else {
$str = get_string('uploadafile', 'assignment');
}
} else {
$str = get_string('uploadafile', 'assignment');
}
echo $OUTPUT->single_button(new moodle_url('/mod/assignment/type/uploadsingle/upload.php', array('contextid'=>$this->context->id, 'userid'=>$USER->id)), $str, 'get');
echo $OUTPUT->box_end();
}
function upload($mform) {
$action = required_param('action', PARAM_ALPHA);
switch ($action) {
case 'uploadresponse':
$this->upload_responsefile($mform);
break;
case 'uploadfile':
$this->upload_file($mform);
}
}
function upload_file($mform) {
global $CFG, $USER, $DB, $OUTPUT;
$viewurl = new moodle_url('/mod/assignment/view.php', array('id'=>$this->cm->id));
if (!is_enrolled($this->context, $USER, 'mod/assignment:submit')) {
redirect($viewurl);
}
$submission = $this->get_submission($USER->id);
$filecount = 0;
if ($submission) {
$filecount = $this->count_user_files($submission->id);
}
if ($this->isopen() && (!$filecount || $this->assignment->resubmit || !$submission->timemarked)) {
if ($submission = $this->get_submission($USER->id)) {
//TODO: change later to ">= 0", to prevent resubmission when graded 0
if (($submission->grade > 0) and !$this->assignment->resubmit) {
redirect($viewurl, get_string('alreadygraded', 'assignment'));
}
}
if ($formdata = $mform->get_data()) {
$fs = get_file_storage();
$submission = $this->get_submission($USER->id, true); //create new submission if needed
$fs->delete_area_files($this->context->id, 'mod_assignment', 'submission', $submission->id);
if ($newfilename = $mform->get_new_filename('assignment_file')) {
$file = $mform->save_stored_file('assignment_file', $this->context->id, 'mod_assignment', 'submission',
$submission->id, '/', $newfilename);
$updates = new stdClass(); //just enough data for updating the submission
$updates->timemodified = time();
$updates->numfiles = 1;
$updates->id = $submission->id;
$DB->update_record('assignment_submissions', $updates);
add_to_log($this->course->id, 'assignment', 'upload', 'view.php?a='.$this->assignment->id, $this->assignment->id, $this->cm->id);
$this->update_grade($submission);
$this->email_teachers($submission);
// Let Moodle know that an assessable file was uploaded (eg for plagiarism detection)
$eventdata = new stdClass();
$eventdata->modulename = 'assignment';
$eventdata->cmid = $this->cm->id;
$eventdata->itemid = $submission->id;
$eventdata->courseid = $this->course->id;
$eventdata->userid = $USER->id;
$eventdata->file = $file;
events_trigger('assessable_file_uploaded', $eventdata);
}
redirect($viewurl, get_string('uploadedfile'));
} else {
redirect($viewurl, get_string('uploaderror', 'assignment')); //submitting not allowed!
}
}
redirect($viewurl);
}
function upload_responsefile($mform) {
global $CFG, $USER, $OUTPUT, $PAGE;
$userid = required_param('userid', PARAM_INT);
$mode = required_param('mode', PARAM_ALPHA);
$offset = required_param('offset', PARAM_INT);
$returnurl = new moodle_url("/mod/assignment/submissions.php", array('id'=>$this->cm->id,'userid'=>$userid,'mode'=>$mode,'offset'=>$offset)); //not xhtml, just url.
if ($formdata = $mform->get_data() and $this->can_manage_responsefiles()) {
$fs = get_file_storage();
$submission = $this->get_submission($userid, true); //create new submission if needed
$fs->delete_area_files($this->context->id, 'mod_assignment', 'response', $submission->id);
if ($newfilename = $mform->get_new_filename('assignment_file')) {
$file = $mform->save_stored_file('assignment_file', $this->context->id,
'mod_assignment', 'response',$submission->id, '/', $newfilename);
}
redirect($returnurl, get_string('uploadedfile'));
} else {
redirect($returnurl, get_string('uploaderror', 'assignment')); //submitting not allowed!
}
}
function setup_elements(&$mform) {
global $CFG, $COURSE;
$ynoptions = array( 0 => get_string('no'), 1 => get_string('yes'));
$mform->addElement('select', 'resubmit', get_string('allowresubmit', 'assignment'), $ynoptions);
$mform->addHelpButton('resubmit', 'allowresubmit', 'assignment');
$mform->setDefault('resubmit', 0);
$mform->addElement('select', 'emailteachers', get_string('emailteachers', 'assignment'), $ynoptions);
$mform->addHelpButton('emailteachers', 'emailteachers', 'assignment');
$mform->setDefault('emailteachers', 0);
$choices = get_max_upload_sizes($CFG->maxbytes, $COURSE->maxbytes);
$choices[0] = get_string('courseuploadlimit') . ' ('.display_size($COURSE->maxbytes).')';
$mform->addElement('select', 'maxbytes', get_string('maximumsize', 'assignment'), $choices);
$mform->setDefault('maxbytes', $CFG->assignment_maxbytes);
$course_context = get_context_instance(CONTEXT_COURSE, $COURSE->id);
plagiarism_get_form_elements_module($mform, $course_context);
}
function portfolio_exportable() {
return true;
}
function send_file($filearea, $args) {
global $CFG, $DB, $USER;
require_once($CFG->libdir.'/filelib.php');
require_login($this->course, false, $this->cm);
if ($filearea !== 'submission' && $filearea !== 'response') {
return false;
}
$submissionid = (int)array_shift($args);
if (!$submission = $DB->get_record('assignment_submissions', array('assignment'=>$this->assignment->id, 'id'=>$submissionid))) {
return false;
}
if ($USER->id != $submission->userid and !has_capability('mod/assignment:grade', $this->context)) {
return false;
}
$relativepath = implode('/', $args);
$fullpath = '/'.$this->context->id.'/mod_assignment/'.$filearea.'/'.$submissionid.'/'.$relativepath;
$fs = get_file_storage();
if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
return false;
}
send_stored_file($file, 0, 0, true); // download MUST be forced - security!
}
function extend_settings_navigation($node) {
global $CFG, $USER, $OUTPUT;
// get users submission if there is one
$submission = $this->get_submission();
if (is_enrolled($this->context, $USER, 'mod/assignment:submit')) {
$editable = $this->isopen() && (!$submission || $this->assignment->resubmit || !$submission->timemarked);
} else {
$editable = false;
}
// If the user has submitted something add some related links and data
if (isset($submission->numfiles) AND $submission->numfiles) {
// Add a view link to the settings nav
$link = new moodle_url('/mod/assignment/view.php', array('id'=>$this->cm->id));
$node->add(get_string('viewmysubmission', 'assignment'), $link, navigation_node::TYPE_SETTING);
if (!empty($submission->timemodified)) {
$submissionnode = $node->add(get_string('submitted', 'assignment') . ' ' . userdate($submission->timemodified));
$submissionnode->text = preg_replace('#([^,])\s#', '$1&nbsp;', $submissionnode->text);
$submissionnode->add_class('note');
if ($submission->timemodified <= $this->assignment->timedue || empty($this->assignment->timedue)) {
$submissionnode->add_class('early');
} else {
$submissionnode->add_class('late');
}
}
}
// Check if the user has uploaded any files, if so we can add some more stuff to the settings nav
if ($submission && is_enrolled($this->context, $USER, 'mod/assignment:submit') && $this->count_user_files($submission->id)) {
$fs = get_file_storage();
if ($files = $fs->get_area_files($this->context->id, 'mod_assignment', 'submission', $submission->id, "timemodified", false)) {
$filenode = $node->add(get_string('submission', 'assignment'));
foreach ($files as $file) {
$filename = $file->get_filename();
$mimetype = $file->get_mimetype();
$link = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.$this->context->id.'/mod_assignment', 'submission/'.$submission->id.'/'.$filename);
$filenode->add($filename, $link, navigation_node::TYPE_SETTING, null, null, new pix_icon(file_mimetype_icon($mimetype), ''));
}
}
}
}
/**
* creates a zip of all assignment submissions and sends a zip to the browser
*/
function download_submissions() {
global $CFG,$DB;
require_once($CFG->libdir.'/filelib.php');
$submissions = $this->get_submissions('','');
if (empty($submissions)) {
print_error('errornosubmissions', 'assignment');
}
$filesforzipping = array();
$fs = get_file_storage();
$groupmode = groups_get_activity_groupmode($this->cm);
$groupid = 0; // All users
$groupname = '';
if ($groupmode) {
$groupid = groups_get_activity_group($this->cm, true);
$groupname = groups_get_group_name($groupid).'-';
}
$filename = str_replace(' ', '_', clean_filename($this->course->shortname.'-'.$this->assignment->name.'-'.$groupname.$this->assignment->id.".zip")); //name of new zip file.
foreach ($submissions as $submission) {
$a_userid = $submission->userid; //get userid
if ((groups_is_member($groupid,$a_userid)or !$groupmode or !$groupid)) {
$a_assignid = $submission->assignment; //get name of this assignment for use in the file names.
$a_user = $DB->get_record("user", array("id"=>$a_userid),'id,username,firstname,lastname'); //get user firstname/lastname
$files = $fs->get_area_files($this->context->id, 'mod_assignment', 'submission', $submission->id, "timemodified", false);
foreach ($files as $file) {
//get files new name.
$fileext = strstr($file->get_filename(), '.');
$fileoriginal = str_replace($fileext, '', $file->get_filename());
$fileforzipname = clean_filename(fullname($a_user) . "_" . $fileoriginal."_".$a_userid.$fileext);
//save file name to array for zipping.
$filesforzipping[$fileforzipname] = $file;
}
}
} // End of foreach
if ($zipfile = assignment_pack_files($filesforzipping)) {
send_temp_file($zipfile, $filename); //send file and delete after sending.
}
}
/**
* Check the given submission is complete. Preliminary rows are often created in the assignment_submissions
* table before a submission actually takes place. This function checks to see if the given submission has actually
* been submitted.
*
* @param stdClass $submission The submission we want to check for completion
* @return bool Indicates if the submission was found to be complete
*/
public function is_submitted_with_required_data($submission) {
return ($submission->timemodified AND $submission->numfiles > 0);
}
}
class mod_assignment_uploadsingle_response_form extends moodleform {
function definition() {
$mform = $this->_form;
$instance = $this->_customdata;
// visible elements
$mform->addElement('filepicker', 'assignment_file', get_string('uploadafile'), null, $instance->options);
// hidden params
$mform->addElement('hidden', 'id', $instance->cm->id);
$mform->setType('id', PARAM_INT);
$mform->addElement('hidden', 'contextid', $instance->contextid);
$mform->setType('contextid', PARAM_INT);
$mform->addElement('hidden', 'action', 'uploadresponse');
$mform->setType('action', PARAM_ALPHA);
$mform->addElement('hidden', 'mode', $instance->mode);
$mform->setType('mode', PARAM_ALPHA);
$mform->addElement('hidden', 'offset', $instance->offset);
$mform->setType('offset', PARAM_INT);
$mform->addElement('hidden', 'forcerefresh' , $instance->forcerefresh);
$mform->setType('forcerefresh', PARAM_INT);
$mform->addElement('hidden', 'userid', $instance->userid);
$mform->setType('userid', PARAM_INT);
// buttons
$this->add_action_buttons(false, get_string('uploadthisfile'));
}
}
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