function get_page_image($pageno, $submission)
{
global $CFG, $DB;
$pagefilename = 'page' . $pageno . '.png';
$pdf = new MyPDFLib();
$pagecount = $submission->numfiles >> 1;
// Extract the pagecount from 'numfiles' (may be 0)
$fs = get_file_storage();
// If pagecount is 0, then we need to skip down to the next stage to find the real page count
if ($pagecount && ($file = $fs->get_file($this->context->id, 'mod_assignment', 'image', $submission->id, '/', $pagefilename))) {
if ($imageinfo = $file->get_imageinfo()) {
$imgurl = file_encode_url($CFG->wwwroot . '/pluginfile.php', '/' . $this->context->id . '/mod_assignment/image/' . $submission->id . '/' . $pagefilename);
// Prevent browser from caching image if it has changed
if (strpos($imgurl, '?') === false) {
$imgurl .= '?ts=' . $file->get_timemodified();
} else {
$imgurl .= '&ts=' . $file->get_timemodified();
}
return array($imgurl, $imageinfo['width'], $imageinfo['height'], $pagecount);
}
// If the image is bad in some way, try to create a new image instead
}
// Generate the image
$tempfolder = $this->get_temp_folder($submission->id);
$imagefolder = $tempfolder . 'img';
if (!file_exists($imagefolder)) {
if (!mkdir($imagefolder, 0777, true)) {
echo "Unable to create temporary image folder";
die;
}
}
$pdffolder = $tempfolder . 'sub';
$pdffile = $pdffolder . '/submission.pdf';
if (!file_exists($pdffolder)) {
if (!mkdir($pdffolder, 0777, true)) {
echo "Unable to create temporary folder";
die;
}
}
if (!($file = $fs->get_file($this->context->id, 'mod_assignment', 'submissionfinal', $submission->id, '/', 'submission.pdf'))) {
print_error('Attempting to display image for non-existant submission');
}
$file->copy_content_to($pdffile);
// Copy the PDF out of the file storage, into the temp area
$pagecount = $pdf->set_pdf($pdffile, $pagecount);
// Only loads the PDF if the pagecount is unknown (0)
if ($pageno > $pagecount) {
unlink($pdffile);
return array(null, 0, 0, $pagecount);
}
$pdf->set_image_folder($imagefolder);
if (!($imgname = $pdf->get_image($pageno))) {
// Generate the image in the temp area
print_error(get_string('errorgenerateimage', 'assignment_uploadpdf'));
}
if (($submission->numfiles & 1) == 0) {
$submission->numfiles = $pagecount << 1 | 1;
// Use this as a flag that there are images to delete at some point
// Maybe switch to just searching the filestorage database to find old images?
$updated = new stdClass();
$updated->id = $submission->id;
$updated->numfiles = $submission->numfiles;
$DB->update_record('assignment_submissions', $updated);
}
$imginfo = array('contextid' => $this->context->id, 'component' => 'mod_assignment', 'filearea' => 'image', 'itemid' => $submission->id, 'filepath' => '/', 'filename' => $pagefilename);
$file = $fs->create_file_from_pathname($imginfo, $imagefolder . '/' . $imgname);
// Copy the image into the file storage
//Delete the temporary files
unlink($pdffile);
unlink($imagefolder . '/' . $imgname);
rmdir($imagefolder);
rmdir($pdffolder);
rmdir($tempfolder);
if ($imageinfo = $file->get_imageinfo()) {
$imgurl = file_encode_url($CFG->wwwroot . '/pluginfile.php', '/' . $this->context->id . '/mod_assignment/image/' . $submission->id . '/' . $pagefilename);
// Prevent browser from caching image if it has changed
if (strpos($imgurl, '?') === false) {
$imgurl .= '?ts=' . $file->get_timemodified();
} else {
$imgurl .= '&ts=' . $file->get_timemodified();
}
return array($imgurl, $imageinfo['width'], $imageinfo['height'], $pagecount);
}
return array(null, 0, 0, $pagecount);
}
function get_page_image($userid, $pageno, $submission)
{
global $CFG;
$imagefolder = $CFG->dataroot . '/' . $this->file_area_name($userid) . '/images';
check_dir_exists($imagefolder, true, true);
$pdffile = $CFG->dataroot . '/' . $this->file_area_name($userid) . '/submission/submission.pdf';
// Check folder exists + file exists
if (!file_exists($pdffile)) {
error('Attempting to display image for non-existing submission');
}
$pdf = new MyPDFLib();
$pdf->set_image_folder($imagefolder);
$pagecount = $submission->numfiles >> 1;
// Extract the pagecount from 'numfiles' (may be 0)
$pagecount = $pdf->set_pdf($pdffile, $pagecount);
// Only loads the PDF if the pagecount is unknown (0)
if ($pageno > $pagecount) {
return array(null, 0, 0, $pagecount);
}
if (!($imgname = $pdf->get_image($pageno))) {
error(get_string('errorgenerateimage', 'assignment_uploadpdf'));
}
if (($submission->numfiles & 1) == 0) {
$submission->numfiles = $pagecount << 1 | 1;
/* Use this as a flag that there are images to delete at some point */
$updated = new Object();
$updated->id = $submission->id;
$updated->numfiles = $submission->numfiles;
update_record('assignment_submissions', $updated);
}
$imageurl = $CFG->wwwroot . '/file.php?file=/' . $this->file_area_name($userid) . '/images/' . $imgname;
list($imgwidth, $imgheight, $imgtype, $imgattr) = getimagesize($CFG->dataroot . '/' . $this->file_area_name($userid) . '/images/' . $imgname);
return array($imageurl, $imgwidth, $imgheight, $pagecount);
}
}
}
} elseif ($uploadpreview) {
$partdest = $courseid . IMAGE_PATH;
$fulldest = $CFG->dataroot . '/' . $partdest;
check_dir_exists($fulldest);
require_once $CFG->dirroot . '/lib/uploadlib.php';
$um = new upload_manager('preview', false, false, $course, false, 0, true);
if ($um->process_file_uploads($partdest)) {
$fp = $um->get_new_filepath();
$fn = $um->get_new_filename();
require_once 'mypdflib.php';
$pdf = new MyPDFLib();
$pdf->load_pdf($fp);
$pdf->set_image_folder($fulldest);
$imagename = $pdf->get_image(1);
unlink($fp);
} else {
//echo 'No file uploaded';
//die;
}
} elseif ($duplicatetemplate) {
// Should not have access to the 'duplicate' button unless a template is selected
// but, just in case, we check here (but just do nothing if that is not the case)
if ($templateid != -1) {
$template = get_record('assignment_uploadpdf_tmpl', 'id', $templateid);
if (!$template) {
error("Old template not found");
}
$template->course = $courseid;
$template->name = $template->name . get_string('templatecopy', 'assignment_uploadpdf');
function upload_preview()
{
global $CFG;
$imagefolder = $CFG->dataroot . '/temp/uploadpdf/img';
if (!file_exists($imagefolder)) {
if (!mkdir($imagefolder, 0777, true)) {
echo "Unable to create temporary image folder";
die;
}
}
$mform = new edit_templates_form();
$fname = $mform->save_temp_file('preview');
if (!$fname) {
return;
}
$pdf = new MyPDFLib();
$pdf->load_pdf($fname);
$pdf->set_image_folder($imagefolder);
$imgname = $pdf->get_image(1);
$context = get_context_instance(CONTEXT_COURSE, $this->courseid);
$fs = get_file_storage();
if ($oldfile = $fs->get_file($context->id, 'mod_assignment', 'previewimage', 0, '/', 'preview.png')) {
$oldfile->delete();
}
$imginfo = array('contextid' => $context->id, 'component' => 'mod_assignment', 'filearea' => 'previewimage', 'itemid' => 0, 'filepath' => '/', 'filename' => 'preview.png');
$file = $fs->create_file_from_pathname($imginfo, $imagefolder . '/' . $imgname);
// Copy the image into the file storage
//Delete the temporary files
unlink($fname);
unlink($imagefolder . '/' . $imgname);
$this->imagetime = time();
}
