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item_thumb.php
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item_thumb.php
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<?php
// This file is part of Exabis Eportfolio (extension for Moodle)
//
// 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/>.
// (c) 2016 GTN - Global Training Network GmbH <[email protected]>.
require_once(__DIR__.'/inc.php');
$itemid = optional_param('item_id', -1, PARAM_INT);
$access = optional_param('access', '', PARAM_TEXT);
// sometimes for artifacts with multiple images
$imageindex = optional_param('imindex', '', PARAM_INT);
$ispdf = optional_param('ispdf', 0, PARAM_INT);
$is_for_pdf = false;
$pdfuserid = 0;
if ($ispdf) {
$vhash = optional_param('vhash', 0, PARAM_RAW);
$vid = optional_param('vid', 0, PARAM_INT);
$pdfuserid = optional_param('uid', 0, PARAM_INT);
$view = $DB->get_record('block_exaportview', ['id' => $vid]);
if ($view && $view->hash == $vhash && $pdfuserid > 0) {
$is_for_pdf = true;
}
}
$item = null;
// Thumbnails for BackEnd (editing the view part).
if ($access == '') {
if ($sharable = block_exaport_can_user_access_shared_item($USER->id, $itemid)) {
// Get thumbnails if item was shared for current user.
$item = $DB->get_record('block_exaportitem', array('id' => $itemid));
} else {
// Get only for self (owner).
$item = $DB->get_record('block_exaportitem', array('id' => $itemid, 'userid' => $USER->id));
}
} else {
// Checking access to item by access to view.
if (!$view = block_exaport_get_view_from_access($access, $is_for_pdf, $pdfuserid)) {
die("view not found");
}
$viewid = $view->id;
$viewownerid = $view->userid;
$item = $DB->get_record('block_exaportitem', array('id' => $itemid));
$sharable = block_exaport_can_user_access_shared_item($viewownerid, $itemid);
if ($viewownerid != $item->userid && !$sharable) {
throw new moodle_exception('item not found');
}
}
if (empty($item)) {
throw new moodle_exception('item not found');
}
// Custom Icon file.
if ($iconfile = block_exaport_get_files($item, 'item_iconfile', true)) {
if (is_array($iconfile)) { // from new moodle version?
$iconfile = reset($iconfile);
}
send_stored_file($iconfile);
exit;
}
switch ($item->type) {
case "file":
// Thumbnail of file.
$file = block_exaport_get_item_files($item);
// Serve file.
if ($file && ($imageindex || $imageindex === 0 )) {
$filevalues = array_values($file);
$single_file = $filevalues[$imageindex];
if ($single_file && $single_file->is_valid_image()) {
send_stored_file($single_file, 1);
exit;
}
$file = $single_file;
} else if ($file) {
if (is_array($file)) {
if (count($file) > 1) {
$mixedimage = block_exaport_mix_images($file);
// $file->is_valid_image()
// send_stored_file($file, 1); // !!!!!!!!!!!!!!! may be make composite of images?
echo 'mixed image';
exit;
} else {
$single_file = reset($file);
if ($single_file->is_valid_image()) {
send_stored_file($single_file, 1);
exit;
}
$file = $single_file;
}
} else {
if ($file->is_valid_image()) {
send_stored_file($file, 1);
exit;
}
}
}
$output = block_exaport_get_renderer();
// Needed for pix_url.
$PAGE->set_context(context_system::instance());
$icon = $output->image_url(file_file_icon($file, 90));
// TODO: If Pdf will have a problems - look a solution with readfile below
header('Location: '.$icon);
break;
case "link":
$url = $item->url;
if ($purl = parse_url($url)) {
if (!isset($purl["scheme"]) || strpos($purl["scheme"], 'http') === false) {
$url = 'http://'.$url;
}
}
$str = @file_get_contents($url);
if ($str && preg_match('/<img\s.*src=[\'"]([^\'"]+)[\'"]/im', $str, $matches)) {
$firstimg = $matches[1];
if (strpos($firstimg, 'http') === false) {
if ($firstimg[0] == '/') {
/* google.com + /imgage.png
google.com/sub + /imgage.png. */
$firstimg = preg_replace('!([^:/])/.*$!m', '$1', $url).$firstimg;
} else {
/* google.com + imgage.png. */
$firstimg = $url."/".$firstimg;
}
}
// img must not be a local file, only url
if ($purl = parse_url($firstimg)) {
if (!isset($purl["scheme"]) || strpos($purl["scheme"], 'http') === false) {
$firstimg = 'http://'.$firstimg;
}
}
$imgstr = @file_get_contents($firstimg);
$finfo = new finfo(FILEINFO_MIME_TYPE);
$type = $finfo->buffer($imgstr);
// we need to return only PICTURES
if (strpos($type, 'image/') === false) {
header('Content-Type: image/svg+xml');
readfile('pix/link_tile.svg');
exit;
break;
}
if (strlen($imgstr) < 50) {
header('Content-Type: image/svg+xml');
readfile('pix/link_tile.svg');
exit;
break;
}
header("Content-type: ".$type);
echo $imgstr;
exit;
}
header('Content-Type: image/svg+xml');
readfile('pix/link_tile.svg');
exit;
break;
case "note":
header('Content-Type: image/svg+xml');
readfile('pix/note_tile.svg');
exit;
break;
default:
die('wrong type');
}