648 lines
24 KiB
PHP
648 lines
24 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* @package plagiarism_pchkorg
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* @category plagiarism
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* @copyright PlagiarismCheck.org, https://plagiarismcheck.org/
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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require_once($CFG->dirroot . '/plagiarism/lib.php');
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require_once($CFG->libdir . '/filelib.php');
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require_once($CFG->libdir . '/accesslib.php');
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require_once(__DIR__ . '/classes/plagiarism_pchkorg_config_model.php');
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require_once(__DIR__ . '/classes/plagiarism_pchkorg_api_provider.php');
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/**
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* Class plagiarism_plugin_pchkorg
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*/
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class plagiarism_plugin_pchkorg extends plagiarism_plugin {
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/**
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* hook to allow plagiarism specific information to be displayed beside a submission.
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*
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* @param array $linkarraycontains all relevant information for the plugin to generate a link
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* @return string
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*
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*/
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public function get_links($linkarray) {
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global $DB, $USER;
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$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
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$apitoken = $pchkorgconfigmodel->get_system_config('pchkorg_token');
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$apiprovider = new plagiarism_pchkorg_api_provider($apitoken);
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$cmid = $linkarray['cmid'];
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if (array_key_exists('file', $linkarray)) {
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$file = $linkarray['file'];
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} else {
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// Online text submission.
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$file = null;
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}
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// We can do nothing with submissions which we can not handle.
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if (null !== $file && !$apiprovider->is_supported_mime($file->get_mimetype())) {
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return '';
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}
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// SQL will be called only once, result is static.
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$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
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if ('1' !== $config) {
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return '';
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}
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$context = null;
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if (!empty($cmid)) {
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$context = context_module::instance($cmid);// Get context of course.
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}
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// SQL will be called only once per page. There is static result inside.
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if (!$pchkorgconfigmodel->is_enabled_for_module($cmid)) {
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return '';
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}
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// Only for some type of account, method will call a remote HTTP API.
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// The API will be called only once, because result is static.
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// Also, there is timeout 2 seconds for response.
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// Even if service will be unavailable, method will try call API only once.
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// Also, we don't use raw user email.
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if (!$apiprovider->is_group_member($USER->email)) {
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return '';
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}
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$isgranted = !empty($context) && has_capability('mod/assign:view', $context, null);
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if (!$isgranted) {
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return '';
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}
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$where = new \stdClass();
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$where->cm = $cmid;
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if ($file === null) {
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$where->signature = sha1($linkarray['content']);
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$where->fileid = null;
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} else {
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$where->fileid = $file->get_id();
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}
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$filerecords = $DB->get_records('plagiarism_pchkorg_files', (array) $where,
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'id', '*', 0, 1);
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if ($filerecords) {
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$filerecord = end($filerecords);
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$img = new moodle_url('/plagiarism/pchkorg/pix/icon.png');
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$imgsrc = $img->__toString();
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// Text had been successfully checked.
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if ($filerecord->state == 5) {
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$action = $apiprovider->get_report_action($filerecord->textid);
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$reporttoken = $apiprovider->generate_api_token();
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$formid = 'plagiarism_pchkorg_report_id_' . $filerecord->id;
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$score = $filerecord->score;
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$title = sprintf(get_string('pchkorg_label_title', 'plagiarism_pchkorg'),
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$filerecord->textid,
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$score);
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$label = sprintf(get_string('pchkorg_label_result', 'plagiarism_pchkorg'), $filerecord->textid, $score);
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if ($score < 30) {
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$color = '#63ec80a1';
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} else if (30 < $score && $score < 60) {
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$color = '#f7b011';
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} else {
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$color = '#f04343';
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}
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return '
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<a style="padding: 5px 3px;
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text-decoration: none;
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background-color: ' . $color . ';
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color: black;
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cursor: pointer;
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border-radius: 3px 3px 3px 3px;
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margin: 4px;"
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href="#" title="' . $title . '"
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class="plagiarism_pchkorg_report_id_score"
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onclick="document.getElementById(\'' . $formid . '\').submit(); return false;">
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<img src="' . $imgsrc . '" alt="logo" width="20px;" />
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' . $label . '
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</a><form target="_blank" id="' . $formid . '" action="' . $action . '" method="post">
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<input type="hidden" name="token" value="' . $reporttoken . '"/>
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<input type="hidden" name="lms-type" value="moodle"/>
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</form>';
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} else if ($filerecord->state == 10) {
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$label = get_string('pchkorg_label_queued', 'plagiarism_pchkorg');
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return '
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<span style="padding: 5px 3px;
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text-decoration: none;
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background-color: #eeeded;
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color: black;
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border-radius: 3px 3px 3px 3px;
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margin: 4px;"
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href="#" class="plagiarism_pchkorg_report_id_score">
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<img src="' . $imgsrc . '" alt="logo" width="20px;" />
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' . $label . '
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</span>';
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} else if ($filerecord->state == 12) {
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$label = sprintf(get_string('pchkorg_label_sent', 'plagiarism_pchkorg'), $filerecord->textid);
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return '
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<span style="padding: 5px 3px;
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text-decoration: none;
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background-color: #eeeded;
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color: black;
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border-radius: 3px 3px 3px 3px;
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margin: 4px;"
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href="#" class="plagiarism_pchkorg_report_id_score">
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<img src="' . $imgsrc . '" alt="logo" width="20px;" />
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' . $label . '
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</span>';
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}
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}
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return '';
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}
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/**
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* hook to save plagiarism specific settings on a module settings page
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*
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* @param object $data - data from an mform submission.
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* @throws dml_exception
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*/
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public function save_form_elements($data) {
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global $DB;
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$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
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$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
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if ('1' != $config) {
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return;
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}
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if (!isset($data->pchkorg_module_use)) {
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return;
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}
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$records = $DB->get_records('plagiarism_pchkorg_config', array(
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'cm' => $data->coursemodule
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));
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if (empty($records)) {
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$insert = new \stdClass();
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$insert->cm = $data->coursemodule;
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$insert->name = 'pchkorg_module_use';
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$insert->value = $data->pchkorg_module_use;
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$DB->insert_record('plagiarism_pchkorg_config', $insert);
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} else {
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foreach ($records as $record) {
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$record->value = $data->{$record->name};
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$DB->update_record('plagiarism_pchkorg_config', $record);
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}
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}
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}
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/**
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*
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* Build plugin settings form.
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*
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* @param object $mform
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* @param object $context
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* @param string $modulename
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* @throws coding_exception
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* @throws dml_exception
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*/
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public function get_form_elements_module($mform, $context, $modulename = '') {
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if (!$context || !isset($modulename) || 'mod_assign' !== $modulename) {
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return;
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}
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global $DB;
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$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
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$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
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if ('1' == $config) {
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$defaultcmid = null;
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$cm = optional_param('update', $defaultcmid, PARAM_INT);
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if (null !== $cm) {
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$records = $DB->get_records('plagiarism_pchkorg_config', array(
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'cm' => $cm,
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));
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if (!empty($records)) {
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$record = end($records);
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$mform->setDefault($record->name, $record->value);
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}
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}
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$mform->addElement('header', 'plagiarism_pchkorg', get_string('pluginname', 'plagiarism_pchkorg'));
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$mform->addElement(
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'select',
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$setting = 'pchkorg_module_use',
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get_string('pchkorg_module_use', 'plagiarism_pchkorg'),
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array(get_string('no'), get_string('yes'))
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);
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$mform->addHelpButton('pchkorg_module_use', 'pchkorg_module_use', 'plagiarism_pchkorg');
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if (!isset($mform->exportValues()[$setting]) || is_null($mform->exportValues()[$setting])) {
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$mform->setDefault($setting, '1');
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}
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}
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}
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/**
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* hook to allow a disclosure to be printed notifying users what will happen with their submission.
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*
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* @param int $cmid - course module id
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* @return string
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*/
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public function print_disclosure($cmid) {
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global $OUTPUT;
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if (empty($cmid)) {
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return '';
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}
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// Get course details.
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$cm = get_coursemodule_from_id('', $cmid);
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if (!$cm || $cm->modname != 'assign') {
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return '';
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}
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$configmodel = new plagiarism_pchkorg_config_model();
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$enabled = $configmodel->get_system_config('pchkorg_use');
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if ($enabled !== '1') {
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return '';
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}
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if (!$configmodel->is_enabled_for_module($cmid)) {
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return '';
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}
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$result = '';
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$result .= $OUTPUT->box_start('generalbox boxaligncenter', 'intro');
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$formatoptions = new stdClass;
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$formatoptions->noclean = true;
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$formatoptions->cmid = $cmid;
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$result .= '<div style="background-color: #d5ffd5; padding: 10px; border: 1px solid #b7dab7">';
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$result .= format_text(get_string('pchkorg_disclosure', 'plagiarism_pchkorg'), FORMAT_MOODLE, $formatoptions);
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$result .= '</div>';
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$result .= $OUTPUT->box_end();
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return $result;
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}
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/**
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*
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* Method will handle event assessable_uploaded.
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*
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* @param $eventdata
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* @return bool
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* @throws coding_exception
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* @throws dml_exception
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*/
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public function event_handler($eventdata) {
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global $USER, $DB;
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// We support only assign module so just ignore all other.
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if ($eventdata['other']['modulename'] !== 'assign') {
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return true;
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}
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$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
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$apitoken = $pchkorgconfigmodel->get_system_config('pchkorg_token');
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$apiprovider = new plagiarism_pchkorg_api_provider($apitoken);
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// SQL will be called only once, result is static.
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$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
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if ('1' !== $config) {
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return true;
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}
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// Receive couser moudle id.
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$cmid = $eventdata['contextinstanceid'];
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// Remove the event if the course module no longer exists.
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$cm = get_coursemodule_from_id($eventdata['other']['modulename'], $cmid);
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if (!$cm) {
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return true;
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}
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// SQL will be called only once per page. There is static result inside.
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// Plugin is enabled for this module.
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if (!$pchkorgconfigmodel->is_enabled_for_module($cm->id)) {
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return true;
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}
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// Only for some type of account, method will call a remote HTTP API.
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// The API will be called only once, because result is static.
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// Also, there is timeout 2 seconds for response.
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// Even if service is unavailable, method will try call only once.
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// Also, we don't use raw users email.
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if (!$apiprovider->is_group_member($USER->email)) {
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return true;
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}
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// Set the author and submitter.
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$submitter = $eventdata['userid'];
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$author = (!empty($eventdata['relateduserid'])) ? $eventdata['relateduserid'] : $eventdata['userid'];
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// Related user ID will be NULL if an instructor submits on behalf of a student who is in a group.
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// To get around this, we get the group ID, get the group members and set the author as the first student in the group.
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if ((empty($eventdata['relateduserid'])) && ($eventdata['other']['modulename'] == 'assign')
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&& has_capability('mod/assign:editothersubmission', context_module::instance($cm->id), $submitter)) {
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$moodlesubmission = $DB->get_record('assign_submission', array('id' => $eventdata['objectid']), 'id, groupid');
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if (!empty($moodlesubmission->groupid)) {
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$author = $this->get_first_group_author($cm->course, $moodlesubmission->groupid);
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}
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}
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// Get actual text content and files to be submitted for draft submissions.
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// As this won't be present in eventdata for certain event types.
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if ($eventdata['other']['modulename'] == 'assign' && $eventdata['eventtype'] == "assessable_submitted") {
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// Get content.
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$moodlesubmission = $DB->get_record('assign_submission', array('id' => $eventdata['objectid']), 'id');
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if ($moodletextsubmission = $DB->get_record('assignsubmission_onlinetext',
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array('submission' => $moodlesubmission->id), 'onlinetext')) {
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$eventdata['other']['content'] = $moodletextsubmission->onlinetext;
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}
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$filesconditions = array(
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'component' => 'assignsubmission_file',
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'itemid' => $moodlesubmission->id,
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'userid' => $author
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);
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$moodlefiles = $DB->get_records('files', $filesconditions);
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if ($moodlefiles) {
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$fs = get_file_storage();
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foreach ($moodlefiles as $filedb) {
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$file = $fs->get_file_by_id($filedb->id);
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if (!$file) {
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// We can not find file so we do not send it in queue.
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continue;
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} else {
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try {
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// Check that we can fetch content without exception.
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$content = $file->get_content();
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} catch (Exception $e) {
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// No we can not.
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continue;
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}
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}
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if ($file->get_filename() === '.') {
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continue;
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}
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$filemime = $file->get_mimetype();
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// File type is not supported.
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if (!$apiprovider->is_supported_mime($filemime)) {
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continue;
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}
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$filerecord = new \stdClass();
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$filerecord->fileid = $file->get_id();
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$filerecord->cm = $cmid;
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$filerecord->userid = $USER->id;
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$filerecord->textid = null;
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$filerecord->state = 10;
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$filerecord->created_at = time();
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$filerecord->itemid = $eventdata['objectid'];
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$filerecord->signature = sha1($content);
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$DB->insert_record('plagiarism_pchkorg_files', $filerecord);
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}
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}
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}
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// Queue text content to send to plagiarismcheck.org.
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// If there was an error when creating the assignment then still queue the submission so it can be saved as failed.
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if (in_array($eventdata['eventtype'], array("content_uploaded", "assessable_submitted"))
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&& !empty($eventdata['other']['content'])) {
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$signature = sha1($eventdata['other']['content']);
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$filesconditions = array(
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'signature' => $signature,
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'cm' => $cmid,
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'userid' => $USER->id,
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'itemid' => $eventdata['objectid']
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);
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$oldfile = $DB->get_record('plagiarism_pchkorg_files', $filesconditions);
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if ($oldfile) {
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// There is the same check in database, so we can skip this one.
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return true;
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}
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$filerecord = new \stdClass();
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$filerecord->fileid = null;
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$filerecord->cm = $cmid;
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$filerecord->userid = $USER->id;
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$filerecord->textid = null;
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$filerecord->state = 10;
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$filerecord->created_at = time();
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$filerecord->itemid = $eventdata['objectid'];
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$filerecord->signature = $signature;
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$DB->insert_record('plagiarism_pchkorg_files', $filerecord);
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}
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return true;
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}
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/**
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*
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* Will find the first user in group assignment.
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*
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* @param $cmid
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* @param $groupid
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* @return mixed
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* @throws coding_exception
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*/
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private function get_first_group_author($cmid, $groupid) {
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static $context;
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if (empty($context)) {
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$context = context_course::instance($cmid);
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}
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$groupmembers = groups_get_members($groupid, "u.id");
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foreach ($groupmembers as $author) {
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if (!has_capability('mod/assign:grade', $context, $author->id)) {
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return $author->id;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Method will be called by cron. Method sends queued files into plagiarism check system.
|
|
*
|
|
* @return bool
|
|
* @throws coding_exception
|
|
* @throws dml_exception
|
|
*/
|
|
public function cron_send_submissions() {
|
|
global $DB;
|
|
|
|
$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
|
|
$apitoken = $pchkorgconfigmodel->get_system_config('pchkorg_token');
|
|
$apiprovider = new plagiarism_pchkorg_api_provider($apitoken);
|
|
|
|
// SQL will be called only once, result is static.
|
|
$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
|
|
if ('1' !== $config) {
|
|
return true;
|
|
}
|
|
|
|
$filesconditions = array('state' => 10);
|
|
|
|
$moodlefiles = $DB->get_records('plagiarism_pchkorg_files', $filesconditions,
|
|
'id', '*', 0, 20);
|
|
if ($moodlefiles) {
|
|
$fs = get_file_storage();
|
|
|
|
foreach ($moodlefiles as $filedb) {
|
|
$textid = null;
|
|
$user = $DB->get_record('user', array('id' => $filedb->userid));
|
|
// This is attached file.
|
|
$cm = get_coursemodule_from_id('', $filedb->cm);
|
|
if ($filedb->fileid === null) {
|
|
$moodletextsubmission = $DB->get_record('assignsubmission_onlinetext',
|
|
array('submission' => $filedb->itemid), '*');
|
|
if ($moodletextsubmission) {
|
|
$content = $moodletextsubmission->onlinetext;
|
|
|
|
if ($apiprovider->is_group_token()) {
|
|
$textid = $apiprovider->send_group_text(
|
|
$apiprovider->user_email_to_hash($user->email),
|
|
$cm->course,
|
|
$cm->id,
|
|
$moodletextsubmission->id,
|
|
$moodletextsubmission->id,
|
|
html_to_text($content, 75, false),
|
|
'plain/text',
|
|
sprintf('%s-submussion.txt', $moodletextsubmission->id)
|
|
);
|
|
} else {
|
|
$textid = $apiprovider->send_text(
|
|
html_to_text($content, 75, false),
|
|
'plain/text',
|
|
sprintf('%s-submussion.txt', $moodletextsubmission->id)
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
$moodlesubmission = $DB->get_record('assign_submission', array('assignment' => $cm->instance,
|
|
'userid' => $filedb->userid, 'id' => $filedb->itemid), 'id');
|
|
$file = $fs->get_file_by_id($filedb->fileid);
|
|
if ($apiprovider->is_group_token()) {
|
|
$textid = $apiprovider->send_group_text(
|
|
$apiprovider->user_email_to_hash($user->email),
|
|
$cm->course,
|
|
$cm->id,
|
|
$moodlesubmission->id,
|
|
$file->get_id(),
|
|
$file->get_content(),
|
|
$file->get_mimetype(),
|
|
$file->get_filename()
|
|
);
|
|
} else {
|
|
$agreementwhere = array(
|
|
'cm' => 0,
|
|
'name' => 'accepter_agreement',
|
|
'value' => '1'
|
|
);
|
|
$agreementaccepted = $DB->get_records('plagiarism_pchkorg_config', $agreementwhere);
|
|
if (!$agreementaccepted) {
|
|
$apiprovider->save_accepted_agreement();
|
|
$DB->insert_record('plagiarism_pchkorg_config', $agreementwhere);
|
|
}
|
|
|
|
$textid = $apiprovider->send_text(
|
|
$file->get_content(),
|
|
$file->get_mimetype(),
|
|
$file->get_filename()
|
|
);
|
|
}
|
|
}
|
|
|
|
$filedbnew = new stdClass();
|
|
$filedbnew->id = $filedb->id;
|
|
if ($textid) {
|
|
// Text was successfully sent to the service.
|
|
$filedbnew->textid = $textid;
|
|
$filedbnew->state = 12; // 12 - is SENT.
|
|
} else {
|
|
$filedbnew->attempt = $filedb->attempt + 1;
|
|
if ($filedbnew->attempt > 6) {
|
|
$filedbnew->state = 11; // Sending error.
|
|
}
|
|
}
|
|
$DB->update_record('plagiarism_pchkorg_files', $filedbnew);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Method will update similarity score and change status of checks.
|
|
*
|
|
* @return bool
|
|
* @throws dml_exception
|
|
*/
|
|
public function cron_update_reports() {
|
|
global $DB;
|
|
|
|
$pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
|
|
$apitoken = $pchkorgconfigmodel->get_system_config('pchkorg_token');
|
|
$apiprovider = new plagiarism_pchkorg_api_provider($apitoken);
|
|
|
|
// SQL will be called only once, result is static.
|
|
$config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
|
|
if ('1' !== $config) {
|
|
return true;
|
|
}
|
|
|
|
$filesconditions = array('state' => 12);
|
|
|
|
$moodlefiles = $DB->get_records('plagiarism_pchkorg_files', $filesconditions,
|
|
'id', '*', 0, 20);
|
|
|
|
foreach ($moodlefiles as $filedb) {
|
|
$report = $apiprovider->check_text($filedb->textid);
|
|
if ($report !== null) {
|
|
$filedbnew = new stdClass();
|
|
$filedbnew->id = $filedb->id;
|
|
$filedbnew->state = 5;
|
|
$filedbnew->reportid = $report->id;
|
|
$filedbnew->score = $report->percent;
|
|
|
|
$DB->update_record('plagiarism_pchkorg_files', $filedbnew);
|
|
}
|
|
}
|
|
}
|
|
}
|