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lib.php
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lib.php
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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/>.
/**
* lib.php - Contains Plagiarism plugin specific functions called by Modules.
*
* @since 2.0
* @package plagiarism_vericite
* @subpackage plagiarism
* @copyright 2015 VeriCite, Inc.
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
if (!defined('MOODLE_INTERNAL')) {
// It must be included from a Moodle page.
die('Direct access to this script is forbidden.');
}
global $CFG;
require_once $CFG->dirroot.'/plagiarism/lib.php';
require_once $CFG->dirroot.'/plagiarism/vericite/sdk/autoload.php';
define('PLAGIARISM_VERICITE_STATUS_SEND', 0);
define('PLAGIARISM_VERICITE_STATUS_SUCCESS', 1);
define('PLAGIARISM_VERICITE_STATUS_LOCKED', 2);
define('PLAGIARISM_VERICITE_STATUS_FAILED', 3);
define('PLAGIARISM_VERICITE_TOKEN_CACHE_MIN', 20);
define('PLAGIARISM_VERICITE_ACTION_ASSIGNMENTS', "assignments");
define('PLAGIARISM_VERICITE_ACTION_REPORTS_SUBMIT_REQUEST', "reportsSubmitRequest");
define('PLAGIARISM_VERICITE_ACTION_REPORTS_SCORES', "reportsScores");
define('PLAGIARISM_VERICITE_ACTION_REPORTS_URLS', "reportsUrls");
define('PLAGIARISM_VERICITE_REQUEST_ATTEMPTS', 4);
define('PLAGIARISM_VERICITE_SCORE_CACHE_MIN', 30); //after PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN of submission, use this cache time
define('PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN', 60); //do not consult the cache until X minutes after the initial submission
define('PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN_RECHECK', 3); //within PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN of submission, use this cache time
define('PLAGIARISM_VERICITE_SCORE_CACHE_PRELIMINARY_IGNORE_MIN', 5); //preliminary scores to be rechecked soon
define('PLAGIARISM_VERICITE_API_VERSION', "v1");
class plagiarism_plugin_vericite extends plagiarism_plugin
{
/**
* hook to allow plagiarism specific information to be displayed beside a submission
*
* @param array $linkarraycontains all relevant information for the plugin to generate a link
* @return string
*/
public function get_links($linkarray)
{
global $COURSE;
if (!empty($linkarray["file"])) {
$file = $linkarray["file"];
$filearea = $file->get_filearea();
if ($filearea == "feedback_files" || $filearea == "introattachment") {
return;
}
}
$plagiarismsettings = plagiarism_vericite_get_settings();
plagiarism_vericite_log("VeriCite: get_links");
plagiarism_vericite_log(print_r($linkarray, true));
$vericite = array();
$vericite['courseid'] = $COURSE->id;
$vericite['courseTitle'] = $COURSE->fullname;
$vericite['cmid'] = $linkarray['cmid'];
$vericite['userid'] = $linkarray['userid'];
if (!empty($linkarray['assignment']) && !is_number($linkarray['assignment'])) {
$vericite['assignmentTitle'] = $linkarray['assignment']->name;
}
if (!empty($linkarray['content']) && trim($linkarray['content']) != false) {
$file = array();
$linkarray['content'] = '<html>' . $linkarray['content'] . '</html>';
$file['filename'] = "InlineSubmission.html";
$file['type'] = "inline";
$inlinepostfix = "";
if (isset($plagiarismsettings['vericite_disable_dynamic_inline']) && $plagiarismsettings['vericite_disable_dynamic_inline']) {
$inlinepostfix = "inline";
} else {
$inlinepostfix = sha1($linkarray['content']);
}
$file['identifier'] = $this->plagiarism_vericite_identifier_prefix($plagiarismsettings['vericite_accountid'], $linkarray['cmid'], $linkarray['userid']) . $inlinepostfix;
$file['filepath'] = "";
$file['userid'] = $linkarray['userid'];
$file['size'] = 100;
$file['content'] = $linkarray['content'];
$vericite['file'] = $file;
} else if (!empty($linkarray['file'])) {
$file = array();
$file['filename'] = (!empty($linkarray['file']->filename)) ? $linkarray['file']->filename : $linkarray['file']->get_filename();
$file['type'] = "file";
$file['identifier'] = $this->plagiarism_vericite_identifier_prefix($plagiarismsettings['vericite_accountid'], $linkarray['cmid'], $linkarray['userid']) . $linkarray['file']->get_pathnamehash();
$file['filepath'] = (!empty($linkarray['file']->filepath)) ? $linkarray['file']->filepath : $linkarray['file']->get_filepath();
$file['userid'] = $linkarray['file']->get_userid();
$file['size'] = $linkarray['file']->get_filesize();
$vericite['file'] = $file;
}
if (empty($vericite['userid']) || !isset($file) || $file['userid'] !== $vericite['userid'] || $file['size'] > 52428800) {
plagiarism_vericite_log("VeriCite: file isn't set or user id is wrong or file size is too large");
return "";
}
plagiarism_vericite_log("VeriCite: vericite: " . print_r($vericite, true));
$output = '';
// Add link/information about this file to $output.
$results = $this->get_file_results($vericite['cmid'], $vericite['userid'], !empty($linkarray['file']) ? $linkarray['file'] : null, $vericite);
if (empty($results)) {
// No results were found.
return '<br />';
}
if (array_key_exists('error', $results)) {
return $results['error'];
}
$rank = $this->plagiarism_vericite_get_css_rank($results['score']);
$similaritystring = ' <span class="' . format_string($rank) . '">' . format_string($results['score']) . '%</span>';
if (!($results['isPreliminary'] == 1 && $results['viewPreliminaryReport'] == 0)) {
//Show Report and/or Score if allowed.
if (!empty($results['reporturl'])) {
// User gets to see link to similarity report & similarity score
if (($results['viewFullReport'] && $results['viewSimilarityScore']) || $results['isInstructor']) {
$output = '<span class="vericite-report"><a href="' . format_string($results['reporturl']) . '" target="_blank">';
$output .= get_string('similarity', 'plagiarism_vericite').':</a>' . $similaritystring . '</span>';
} else if ($results['viewFullReport'] && !$results['viewSimilarityScore']) {
$output = '<span class="vericite-report"><a href="' . format_string($results['reporturl']) . '" target="_blank">';
$output .= get_string('similarity', 'plagiarism_vericite').'</a></span>';
} else if (!$results['viewFullReport'] && $results['viewSimilarityScore']) {
$output = '<span class="vericite-report">' . get_string('similarity', 'plagiarism_vericite').':' . $similaritystring . '</span>';
} else {
//Not able to view report or score...
}
} else if ($results['viewSimilarityScore'] || $results['isInstructor']) {
$output = '<span class="vericite-report">' . get_string('similarity', 'plagiarism_vericite') . $similaritystring . '</span>';
}
}
return "<br/>" . $output . "<br/>";
}
public function get_file_results($cmid, $userid, $file, $vericite=null)
{
global $DB, $USER, $COURSE, $OUTPUT, $CFG;
$plagiarismsettings = plagiarism_vericite_get_settings();
if (empty($plagiarismsettings)) {
// VeriCite is not enabled
return false;
}
plagiarism_vericite_log("VeriCite: get_file_results: cmid: " . $cmid . ", userId: " . $userid . ", file: " . print_r($file, true));
$plagiarismvalues = $DB->get_records_menu('plagiarism_vericite_config', array('cm' => $vericite['cmid']), '', 'name,value');
if (empty($plagiarismvalues['use_vericite'])) {
plagiarism_vericite_log("VeriCite: not in use for this cm");
// VeriCite not in use for this cm
return false;
}
// Whether the user has permissions to see all items in the context of this module.
// This is determined by whether the user is a "course instructor" if they have assignment:grade.
$modulecontext = context_module::instance($vericite['cmid']);
$gradeassignment = has_capability('mod/assign:grade', $modulecontext);
$viewsimilarityscore = $gradeassignment;
$viewfullreport = $gradeassignment;
if ($USER->id == $vericite['userid']) {
// The user wants to see details on their own report.
if ($plagiarismvalues['plagiarism_show_student_score'] == 1) {
$viewsimilarityscore = true;
}
if ($plagiarismvalues['plagiarism_show_student_report'] == 1) {
$viewfullreport = true;
}
}
if (!$viewsimilarityscore && !$viewfullreport) {
plagiarism_vericite_log("VeriCite: The user has no right to see the requested detail");
// The user has no right to see the requested detail.
return false;
}
$viewPreliminaryReport = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_preliminary_report', true);
$results = array(
'analyzed' => 0,
'score' => '',
'reporturl' => '',
'viewSimilarityScore' => $viewsimilarityscore,
'viewFullReport' => $viewfullreport,
'isInstructor' => $gradeassignment,
'viewPreliminaryReport' => $viewPreliminaryReport,
);
// First check if we already have looked up the score for this class.
$fileid = $vericite['file']['identifier'];
$score = -1;
//do not consult the cache if the timesubmitted is less than PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN
$cacheTime = 60 * PLAGIARISM_VERICITE_SCORE_CACHE_MIN;
$mycontent = null;
$contentscore = $DB->get_records('plagiarism_vericite_files', array('cm' => $vericite['cmid'], 'userid' => $userid, 'identifier' => $fileid), '', 'id,cm,userid,identifier,similarityscore,preliminary,timeretrieved, status, timesubmitted');
if (!empty($contentscore)) {
//there should only be 1 result
foreach ($contentscore as $content) {
$mycontent = $content;
if (isset($mycontent->timesubmitted) && (time() - $mycontent->timesubmitted) < (60 * PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN)) {
//don't consult the cache until at least PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN after submission
plagiarism_vericite_log("don't consult cache");
//recheck after PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN_RECHECK minutes instead of the normal cache time
$cacheTime = 60 * PLAGIARISM_VERICITE_SCORE_CACHE_IGNORE_MIN_RECHECK;
}
$results['isPreliminary'] = $mycontent->preliminary;
if ($mycontent->preliminary==1) {
$cacheTime = 60 * PLAGIARISM_VERICITE_SCORE_CACHE_PRELIMINARY_IGNORE_MIN;
}
plagiarism_vericite_log("cacheTime: " . $cacheTime . " , " . time() . " - " . $mycontent->timesubmitted . " = " . (time() - $mycontent->timesubmitted));
plagiarism_vericite_log("VeriCite: content: " . print_r($mycontent, true));
if ($content->status == PLAGIARISM_VERICITE_STATUS_SUCCESS && (time() - $cacheTime) < $content->timeretrieved) {
// Since our reports are dynamic, only use the db as a cache.
// if its too old of a results, don't set the score and just grab a new one from the API.
$score = $content->similarityscore;
plagiarism_vericite_log("VeriCite: content score: " . $score);
} else {
plagiarism_vericite_log("VeriCite: content was too old: " . $content->timeretrieved);
}
break;
}
} else {
plagiarism_vericite_log("VeriCite: no content scores in db");
}
if ($score < 0) {
// Check to see if we've already looked up the scores just recently.
$scorecachearray = $DB->get_records('plagiarism_vericite_score', array('cm' => $cmid), '', 'id, cm, timeretrieved');
$scorecache = array_shift($scorecachearray);
plagiarism_vericite_log("VeriCite: score cache: " . print_r($scorecache, true));
if (empty($scorecache) || $scorecache->timeretrieved < time() - $cacheTime) {
// We couldn't find the score in the cache, try to look it up with the webservice.
$scoreElement = $this->plagiarism_vericite_get_scores($plagiarismsettings, $COURSE->id, $cmid, $fileid, $userid);
if ($scoreElement != null) {
$score = $scoreElement->similarityscore;
$results['isPreliminary'] = $scoreElement->preliminary;
}
// Update score DB table with the current fetch time.
if (empty($scorecache)) {
$scorecacheelement = new StdClass();
$scorecacheelement->cm = $cmid;
$scorecacheelement->timeretrieved = time();
$DB->insert_record('plagiarism_vericite_score', $scorecacheelement);
} else {
$scorecache->timeretrieved = time();
$DB->update_record('plagiarism_vericite_score', $scorecache);
}
plagiarism_vericite_log("VeriCite: looked up score in VeriCite: " . $score);
} else {
plagiarism_vericite_log("VeriCite: Score lookup throttled, didn't look up score in VeriCite: score: " . $score . " ; now: " . time());
}
}
if ($score < 0 && (empty($mycontent) || $mycontent->status == PLAGIARISM_VERICITE_STATUS_SUCCESS)) {
plagiarism_vericite_log("VeriCite: can't find the score in the cache, the db, or VeriCite and it is not scheduled to be uploaded");
// Ok can't find the score in the cache, the db, or VeriCite and it is not scheduled to be uploaded.
$user = ($userid == $USER->id ? $USER : $DB->get_record('user', array('id' => $userid)));
$customdata = array(
'courseid' => $COURSE->id,
'cmid' => $cmid,
'userid' => $user->id,
'userEmail' => $user->email,
'userFirstName' => $user->firstname,
'userLastName' => $user->lastname,
'vericite' => $vericite,
'file' => (!empty($file)) ? serialize($file) : "",
'dataroot' => $CFG->dataroot,
'contentUserGradeAssignment' => has_capability('mod/assign:grade', $modulecontext, $userid)
);
// Store for cron job to submit the file.
$update = true;
if (empty($mycontent)) {
$newelement = new StdClass();
$update = false;
} else {
$newelement = $mycontent;
}
$newelement->cm = $cmid;
$newelement->timeretrieved = 0;
$newelement->identifier = $fileid;
$newelement->userid = $userid;
$newelement->data = base64_encode(serialize($customdata));
$newelement->status = PLAGIARISM_VERICITE_STATUS_SEND;
try {
if ($update) {
$DB->update_record('plagiarism_vericite_files', $newelement);
} else {
$DB->insert_record('plagiarism_vericite_files', $newelement);
}
} catch (Exception $e) {
plagiarism_vericite_log("VeriCite: newelement: " . print_r($newelement, true) . ";user: " . print_r($user, true), $e);
}
plagiarism_vericite_log("VeriCite: scheduled file to be uploaded: " . print_r($newelement, true));
}
if ($score >= 0) {
// We have successfully found the score and it has been evaluated.
$results['analyzed'] = 1;
$results['score'] = $score;
if ($viewfullreport) {
// See if the token already exists.
$conditions = array('cm' => $vericite['cmid'], 'userid' => $vericite['userid'], 'tokenuser' => $USER->id, 'identifier' => $fileid);
plagiarism_vericite_log("VeriCite: looking for token: " . print_r($conditions, true));
$dbtokens = $DB->get_records('plagiarism_vericite_tokens', $conditions);
foreach ($dbtokens as $dbtoken) {
plagiarism_vericite_log("VeriCite: db token: " . print_r($dbtoken, true));
if (time() - (60 * PLAGIARISM_VERICITE_TOKEN_CACHE_MIN) < $dbtoken->timeretrieved) {
// We found an existing token, set token and break out.
$token = $dbtoken->token;
break;
}
}
if (!isset($token)) {
$apiArgs = array();
$apiArgs['context_id'] = $COURSE->id;
$apiArgs['assignment_id_filter'] = $vericite['cmid'];
$apiArgs['consumer'] = $plagiarismsettings['vericite_accountid'];
$apiArgs['consumer_secret'] = $plagiarismsettings['vericite_secretkey'];
$apiArgs['token_user'] = $USER->id;
if (!$gradeassignment) {
// Non instructors can only see their own items.
$apiArgs['external_content_id_filter'] = $fileid;
$apiArgs['user_id_filter'] = $USER->id;
$apiArgs['token_user_role'] = 'Learner';
} else {
// Send over the param for role so that instructors can see more details.
$apiArgs['external_content_id_filter'] = null;
$apiArgs['user_id_filter'] = null;
$apiArgs['token_user_role'] = 'Instructor';
}
$apiArgs['token_user_first_name'] = $USER->firstname;
$apiArgs['token_user_last_name'] = $USER->lastname;
$apiArgs['token_user_email'] = $USER->email;
$urls = plagiarism_vericite_call_api($plagiarismsettings['vericite_api'], PLAGIARISM_VERICITE_ACTION_REPORTS_URLS, $apiArgs);
if (is_array($urls) && count($urls) > 0) {
foreach ($urls as $report_url_link_response) {
$report_url_link_url = $report_url_link_response->getUrl();
$report_url_link_identifier = $report_url_link_response->getExternalContentId();
// We have an incomplete report response.
if (empty($report_url_link_url) || empty($report_url_link_identifier)) {
plagiarism_vericite_log("VeriCite: unexpectedly found a response missing data: " . print_r($report_url_link_response, true));
continue;
}
plagiarism_vericite_log("for each url:\ngetExternalContentId:\n" . $report_url_link_identifier . "\ngetUrl:\n" . $report_url_link_url);
// See if we found the exact token url we are looking for, if so, set it
if ($fileid == $report_url_link_identifier) {
$token = $report_url_link_url;
}
// Store token in db to use again.
$id = - 1;
foreach ($dbtokens as $dbtoken) {
if ($dbtoken->identifier == $report_url_link_identifier) {
// We found an existing score in the db, update it.
$id = $dbtoken->id;
// This is a matched db item from the query above,
// so we should update the token id and time no matter what.
$dbtoken->token = $report_url_link_url;
$dbtoken->timeretrieved = time();
$DB->update_record('plagiarism_vericite_tokens', $dbtoken);
}
}
// If we didn't find and update the db for an existing token, go ahead and
// store a new record in the db for this token url.
if ($id < 0) {
// Token doesn't already exist, add it.
$newelement = new StdClass();
$newelement->cm = $report_url_link_response->getAssignmentId();
$newelement->userid = $report_url_link_response->getUserId();
$newelement->identifier = $report_url_link_identifier;
$newelement->timeretrieved = time();
$newelement->token = $report_url_link_url;
$newelement->tokenuser = $USER->id;
$DB->insert_record('plagiarism_vericite_tokens', $newelement);
}
}
}
}
if (isset($token)) {
$results['reporturl'] = $token;
}
}
} else {
plagiarism_vericite_log("VeriCite: score wasn't found, returning nothing");
return false;
}
plagiarism_vericite_log("VeriCite: results: " . print_r($results, true));
return $results;
}
/* Hook to save plagiarism specific settings on a module settings page.
* @param object $data - data from an mform submission.
*/
public function save_form_elements($data)
{
global $DB;
if (!plagiarism_vericite_get_settings()) {
return;
}
// Array of posible plagiarism config options.
$plagiarismelements = $this->config_options();
// First get existing values.
if (!isset($data->use_vericite)) {
$data->use_vericite = 0;
}
$plagiarismsettings = plagiarism_vericite_get_settings();
if ($plagiarismsettings && !empty($data->use_vericite)) {
// Set values for settings that were hidden from instructor, but set in plugin settings
if (strcmp("assign", $data->modulename) == 0) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default', true) == 1) {
$data->plagiarism_exclude_quotes = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default', true);
} else {
unset($data->plagiarism_exclude_quotes);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default', true) == 1) {
$data->plagiarism_exclude_self_plag = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default', true);
} else {
unset($data->plagiarism_exclude_self_plag);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default', true) == 1) {
$data->plagiarism_store_inst_index = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default', true);
} else {
unset($data->plagiarism_store_inst_index);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default', true) == 1) {
$data->plagiarism_enabled_student_preview = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default', true);
} else {
unset($data->plagiarism_enabled_student_preview);
}
}
} else if (strcmp("forum", $data->modulename) == 0) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_forums_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_forums', true) == 1) {
$data->plagiarism_exclude_quotes = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_forums', true);
} else {
unset($data->plagiarism_exclude_quotes);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_forums_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_forums', true) == 1) {
$data->plagiarism_exclude_self_plag = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_forums', true);
} else {
unset($data->plagiarism_exclude_self_plag);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_forums_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_forums', true) == 1) {
$data->plagiarism_store_inst_index = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_forums', true);
} else {
unset($data->plagiarism_store_inst_index);
}
}
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_forums_hideinstructor', false) == 1) {
if (plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_forums', true) == 1) {
$data->plagiarism_enabled_student_preview = plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_forums', true);
} else {
unset($data->plagiarism_enabled_student_preview);
}
}
}
}
$existingelements = $DB->get_records_menu('plagiarism_vericite_config', array('cm' => $data->coursemodule), '', 'name,id');
foreach ($plagiarismelements as $element) {
$newelement = new StdClass();
$newelement->cm = $data->coursemodule;
$newelement->name = $element;
$newelement->value = (isset($data->$element) ? $data->$element : 0);
if (isset($existingelements[$element])) {
$newelement->id = $existingelements[$element];
$DB->update_record('plagiarism_vericite_config', $newelement);
} else {
$DB->insert_record('plagiarism_vericite_config', $newelement);
}
}
// Now save the assignment title and instructrions and files (not a big deal if this fails, so wrap in try catch).
try {
$plagiarismsettings = plagiarism_vericite_get_settings();
if ($plagiarismsettings && !empty($data->use_vericite)) {
$apiArgs = array();
$apiArgs['context_id'] = $data->course;
$apiArgs['assignment_id'] = $data->coursemodule;
$apiArgs['consumer'] = $plagiarismsettings['vericite_accountid'];
$apiArgs['consumer_secret'] = $plagiarismsettings['vericite_secretkey'];
$assignmentinfo = array();
$assignmentinfo['assignment_title'] = $data->name;
$assignmentinfo['assignment_instructions'] = $data->intro;
$assignmentinfo['assignment_exclude_quotes'] = (!empty($data->plagiarism_exclude_quotes) && $data->plagiarism_exclude_quotes == 1) ? true : false;
$assignmentinfo['assignment_exclude_self_plag'] = (!empty($data->plagiarism_exclude_self_plag) && $data->plagiarism_exclude_self_plag == 1) ? true : false;
$assignmentinfo['assignment_store_in_index'] = (!empty($data->plagiarism_store_inst_index) && $data->plagiarism_store_inst_index == 1) ? true : false;
$assignmentinfo['assignment_enable_student_preview'] = (!empty($data->plagiarism_enabled_student_preview) && $data->plagiarism_enabled_student_preview == 1) ? true : false;
$assignmentinfo['assignment_due_date'] = isset($data->duedate) ? $data->duedate * 1000 : ''; //VeriCite expects the time to be in milliseconds
// Pass in 0 to delete a grade, otherwise, set the grade.
$assignmentinfo['assignment_grade'] = !empty($data->grade) ? $data->grade : 0;
//TODO: attachments (introattachments)
// $assignmentinfo['assignment_attachment_external_content'] = new \Swagger\Client\Model\ExternalContentData(array('file_name' => 'myfilename', 'upload_content_type' => 'uploadtype', 'upload_content_length' => 123456, 'external_content_id' => 44444));
$assignmentinfo['assignment_attachment_external_content'] = null;
$assignmentdata = new \Swagger\Client\Model\AssignmentData($assignmentinfo);
plagiarism_vericite_log("assignment info: " . serialize($assignmentinfo));
$apiArgs['assignment_data'] = $assignmentdata;
plagiarism_vericite_call_api($plagiarismsettings['vericite_api'], PLAGIARISM_VERICITE_ACTION_ASSIGNMENTS, $apiArgs);
}
} catch (Exception $e) {
plagiarism_vericite_log("Attempted to save the assignment title and instructions.", $e);
}
}
/**
* hook to add plagiarism specific settings to a module settings page
*
* @param object $mform - Moodle form
* @param object $context - current context
*/
public function get_form_elements_module($mform, $context, $modulename = '')
{
global $CFG, $DB;
$plagiarismsettings = plagiarism_vericite_get_settings();
if (!$plagiarismsettings) {
return;
}
$cmid = optional_param('update', 0, PARAM_INT);
if (!empty($cmid)) {
$plagiarismvalues = $DB->get_records_menu('plagiarism_vericite_config', array('cm' => $cmid), '', 'name,value');
}
$plagiarismelements = $this->config_options();
// Add form.
$mform->addElement('header', 'plagiarismdesc', get_string('pluginname', 'plagiarism_vericite'));
$ynoptions = array(0 => get_string('no'), 1 => get_string('yes'));
$mform->addElement('checkbox', 'use_vericite', get_string("usevericite", "plagiarism_vericite"));
if (isset($plagiarismvalues['use_vericite'])) {
$mform->setDefault('use_vericite', $plagiarismvalues['use_vericite']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_use_default'])) {
$mform->setDefault('use_vericite', $plagiarismsettings['vericite_use_default']);
}
$mform->addElement('checkbox', 'plagiarism_show_student_score', get_string("studentscorevericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_show_student_score', 'studentscorevericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_show_student_score', 'use_vericite');
$mform->setDefault('plagiarism_show_student_score', true);
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_show_student_score'])) {
$mform->setDefault('plagiarism_show_student_score', $plagiarismvalues['plagiarism_show_student_score']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_student_score_default'])) {
$mform->setDefault('plagiarism_show_student_score', $plagiarismsettings['vericite_student_score_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_student_score_default_forums'])) {
$mform->setDefault('plagiarism_show_student_score', $plagiarismsettings['vericite_student_score_default_forums']);
}
$mform->addElement('checkbox', 'plagiarism_show_student_report', get_string("studentreportvericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_show_student_report', 'studentreportvericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_show_student_report', 'use_vericite');
$mform->setDefault('plagiarism_show_student_report', true);
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_show_student_report'])) {
$mform->setDefault('plagiarism_show_student_report', $plagiarismvalues['plagiarism_show_student_report']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_student_score_default'])) {
$mform->setDefault('plagiarism_show_student_report', $plagiarismsettings['vericite_student_report_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_student_score_default_forums'])) {
$mform->setDefault('plagiarism_show_student_report', $plagiarismsettings['vericite_student_report_default_forums']);
}
// Exclude Quotes
if (!((strcmp("mod_assign", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_hideinstructor', false) == 1)
|| (strcmp("mod_forum", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_quotes_default_forums_hideinstructor', false) == 1) )
) {
$mform->addElement('checkbox', 'plagiarism_exclude_quotes', get_string("excludequotesvericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_exclude_quotes', 'excludequotesvericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_exclude_quotes', 'use_vericite');
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_exclude_quotes'])) {
$mform->setDefault('plagiarism_exclude_quotes', $plagiarismvalues['plagiarism_exclude_quotes']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_exclude_quotes_default'])) {
$mform->setDefault('plagiarism_exclude_quotes', $plagiarismsettings['vericite_exclude_quotes_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_exclude_quotes_default_forums'])) {
$mform->setDefault('plagiarism_exclude_quotes', $plagiarismsettings['vericite_exclude_quotes_default_forums']);
}
}
// Exclude Self Plag
if (!((strcmp("mod_assign", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_hideinstructor', false) == 1)
|| (strcmp("mod_forum", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_exclude_self_plag_default_forums_hideinstructor', false) == 1) )
) {
$mform->addElement('checkbox', 'plagiarism_exclude_self_plag', get_string("excludeselfplagvericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_exclude_self_plag', 'excludeselfplagvericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_exclude_self_plag', 'use_vericite');
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_exclude_self_plag'])) {
$mform->setDefault('plagiarism_exclude_self_plag', $plagiarismvalues['plagiarism_exclude_self_plag']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_exclude_self_plag_default'])) {
$mform->setDefault('plagiarism_exclude_self_plag', $plagiarismsettings['vericite_exclude_self_plag_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_exclude_self_plag_default_forums'])) {
$mform->setDefault('plagiarism_exclude_self_plag', $plagiarismsettings['vericite_exclude_self_plag_default_forums']);
}
}
// Store in Inst Index
if (!((strcmp("mod_assign", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_hideinstructor', false) == 1)
|| (strcmp("mod_forum", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_store_inst_index_default_forums_hideinstructor', false) == 1) )
) {
$mform->addElement('checkbox', 'plagiarism_store_inst_index', get_string("storeinstindexvericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_store_inst_index', 'storeinstindexvericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_store_inst_index', 'use_vericite');
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_store_inst_index'])) {
$mform->setDefault('plagiarism_store_inst_index', $plagiarismvalues['plagiarism_store_inst_index']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_store_inst_index_default'])) {
$mform->setDefault('plagiarism_store_inst_index', $plagiarismsettings['vericite_store_inst_index_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_store_inst_index_default_forums'])) {
$mform->setDefault('plagiarism_store_inst_index', $plagiarismsettings['vericite_store_inst_index_default_forums']);
}
$mform->setDefault('vericite_student_score_default', true);
}
// Enable Student Preview
if (!((strcmp("mod_assign", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_hideinstructor', false) == 1)
|| (strcmp("mod_forum", $modulename) == 0 && plagiarism_vericite_get_setting_boolean($plagiarismsettings, 'vericite_enabled_student_preview_default_forums_hideinstructor', false) == 1) )
) {
$mform->addElement('checkbox', 'plagiarism_enabled_student_preview', get_string("enablestupreviewvericite", "plagiarism_vericite"));
$mform->addHelpButton('plagiarism_enabled_student_preview', 'enablestupreviewvericite', 'plagiarism_vericite');
$mform->disabledIf('plagiarism_enabled_student_preview', 'use_vericite');
// Only show DB saved setting if use_vericite is enabled, otherwise, only show defaults.
if (!empty($plagiarismvalues['use_vericite']) && isset($plagiarismvalues['plagiarism_enabled_student_preview'])) {
$mform->setDefault('plagiarism_enabled_student_preview', $plagiarismvalues['plagiarism_enabled_student_preview']);
} else if (strcmp("mod_forum", $modulename) != 0 && isset($plagiarismsettings['vericite_enabled_student_preview_default'])) {
$mform->setDefault('plagiarism_enabled_student_preview', $plagiarismsettings['vericite_enabled_student_preview_default']);
} else if (strcmp("mod_forum", $modulename) == 0 && isset($plagiarismsettings['vericite_enabled_student_preview_default_forums'])) {
$mform->setDefault('plagiarism_enabled_student_preview', $plagiarismsettings['vericite_enabled_student_preview_default_forums']);
}
$mform->setDefault('vericite_student_score_default', false);
}
}
public function config_options()
{
return array('use_vericite', 'plagiarism_show_student_score', 'plagiarism_show_student_report', 'plagiarism_exclude_quotes', 'plagiarism_exclude_self_plag', 'plagiarism_store_inst_index', 'plagiarism_enabled_student_preview');
}
/**
* Hook to allow a disclosure to be printed notifying users what will happen with their submission
*
* @param int $cmid - course module id
* @return string
*/
public function print_disclosure($cmid)
{
global $OUTPUT, $DB;
$output = '';
if (!empty($cmid)) {
$plagiarismsettings = (array)get_config('plagiarism');
$disclosure = $plagiarismsettings['vericite_student_disclosure'];
if (!empty($disclosure)) {
$plagiarismvalues = $DB->get_records_menu('plagiarism_vericite_config', array('cm' => $cmid), '', 'name,value');
if (!empty($plagiarismvalues) && $plagiarismvalues['use_vericite']) {
$contents = format_text($disclosure, FORMAT_MOODLE, array("noclean" => true));
$output = $OUTPUT->box($contents, 'generalbox boxaligncenter', 'intro');
}
}
}
return $output;
}
/**
* Hook to allow status of submitted files to be updated - called on grading/report pages.
*
* @param object $course - full Course object
* @param object $cm - full cm object
*/
public function update_status($course, $cm)
{
// Called at top of submissions/grading pages - allows printing of admin style links or updating status
}
/**
* called by admin/cron.php
*/
public function cron()
{
}
function plagiarism_vericite_get_scores($plagiarismsettings, $courseid, $cmid, $fileid, $userid)
{
global $DB;
$scoreElement = null;
$apiArgs = array();
$apiArgs['context_id'] = $courseid;
$apiArgs['consumer'] = $plagiarismsettings['vericite_accountid'];
$apiArgs['consumer_secret'] = $plagiarismsettings['vericite_secretkey'];
$apiArgs['assignment_id'] = $cmid;
$apiArgs['user_id'] = null;
$apiArgs['external_content_id'] = null;
$scores = plagiarism_vericite_call_api($plagiarismsettings['vericite_api'], PLAGIARISM_VERICITE_ACTION_REPORTS_SCORES, $apiArgs);
// Store results in the cache and set $score if you find the appropriate file score.
$apiscores = array();
if (is_array($scores) && count($scores) > 0) {
foreach ($scores AS $reportscoreresponse) {
$rsrassignment = $reportscoreresponse->getAssignment();
$rsruser = $reportscoreresponse->getUser();
$rsrcontentid = $reportscoreresponse->getExternalContentId();
$rsrscore = $reportscoreresponse->getScore();
// Prior to PHP 5.5, empty() only supports variables; anything else will result in a parse error.
if(!empty($rsrassignment) && !empty($rsruser) && !empty($rsrcontentid) && isset($rsrscore)) {
plagiarism_vericite_log("scores for each\ngetAssignment: " . $rsrassignment . "\ngetUser: " . $rsruser . "\ngetExternalContentId: " . $rsrcontentid . "\ngetScore: " . $rsrscore);
$newelement = new StdClass();
$newelement->cm = $rsrassignment;
$newelement->userid = $rsruser;
$newelement->identifier = $rsrcontentid;
$newelement->similarityscore = $rsrscore;
$newelement->preliminary = $reportscoreresponse->getPreliminary();
$newelement->timeretrieved = time();
$newelement->status = PLAGIARISM_VERICITE_STATUS_SUCCESS;
$newelement->data = '';
$apiscores = array_merge($apiscores, array($newelement));
if ($newelement->identifier == $fileid && $newelement->userid == $userid) {
// We found this file's score, so set it.
plagiarism_vericite_log("score found");
$scoreElement = $newelement;
}
}
}
}
if (count($apiscores) > 0) {
// We found some scores, let's update the DB.
$dbscores = $DB->get_records('plagiarism_vericite_files', array('cm' => $cmid), '', 'id, cm, userid, identifier, similarityscore, preliminary, timeretrieved');
foreach ($apiscores as $apiscore) {
foreach ($dbscores as $dbscore) {
if ($dbscore->cm == $apiscore->cm && $dbscore->userid == $apiscore->userid && $dbscore->identifier == $apiscore->identifier) {
// We found an existing score in the db, update it.
$apiscore->id = $dbscore->id;
break;
}
}
if (!empty($apiscore->id)) {
$DB->update_record('plagiarism_vericite_files', $apiscore);
} else {
$DB->insert_record('plagiarism_vericite_files', $apiscore);
}
}
}
return $scoreElement;
}
private function plagiarism_vericite_get_css_rank($score)
{
$rank = ceil((100 - (int)$score) / 10);
return 'vericite-rank-' . $rank;
}
private function plagiarism_vericite_identifier_prefix($consumer, $cmid, $userid)
{
return $consumer . '_' . $cmid . '_' . $userid . '_';
}
}
function plagiarism_vericite_log($logstring, $e=null)
{
$plagiarismsettings = plagiarism_vericite_get_settings();
if (!empty($plagiarismsettings['vericite_enable_debugging']) && $plagiarismsettings['vericite_enable_debugging']) {
global $CFG;
$logfile = $CFG->dataroot.'/vericite.log';
if (!$fp = fopen($logfile, 'a')) {
return;
}
fwrite($fp, date('c').' - '.$logstring."\n");
// See if there is an exception to report on.
if (isset($e) && is_callable(array($e, 'getMessage'))) {
fwrite($fp, $e->getMessage() . " \n");
}
fclose($fp);
}
}
function plagiarism_vericite_get_settings()
{
static $plagiarismsettings;
if (!empty($plagiarismsettings) || $plagiarismsettings === false) {
return $plagiarismsettings;
}
$plagiarismsettings = (array)get_config('plagiarism');
// Check if enabled.
if (isset($plagiarismsettings['vericite_use']) && $plagiarismsettings['vericite_use']) {
// Now check to make sure required settings are set!
if (empty($plagiarismsettings['vericite_api'])) {
print_error("VeriCite API URL not set!");
}
if (empty($plagiarismsettings['vericite_accountid'])) {
print_error("VeriCite Account Id not set!");
}
if (empty($plagiarismsettings['vericite_secretkey'])) {
print_error("VeriCite Secret not set!");
}
return $plagiarismsettings;
} else {
return false;
}
}
function plagiarism_vericite_get_setting_boolean($plagiarismsettings, $key, $default = false)
{
return isset($plagiarismsettings[$key]) ? $plagiarismsettings[$key] : $default;
}
function plagiarism_vericite_ends_with($str, $test)
{
return substr_compare($str, $test, -strlen($test), strlen($test)) === 0;
}
function plagiarism_vericite_call_api($host_url, $action, $args) {
global $CFG;
// Use the Moodle central proxy settings.
$config = new \Swagger\Client\Configuration();
if (!empty($CFG->proxytype)) {
$config->setCurlProxyType($CFG->proxytype);
}
if (!empty($CFG->proxyhost)) {
$config->setCurlProxyHost($CFG->proxyhost);
}
if (!empty($CFG->proxyport)) {
$config->setCurlProxyPort($CFG->proxyport);
}
if (!empty($CFG->proxyuser)) {
$config->setCurlProxyUser($CFG->proxyuser);
}
if (!empty($CFG->proxypassword)) {
$config->setCurlProxyPassword($CFG->proxypassword);
}
if (!plagiarism_vericite_ends_with($host_url, '/')) {
$host_url .= '/';
}
$host_url .= PLAGIARISM_VERICITE_API_VERSION;
$config->setHost($host_url);
$api_client = new \Swagger\Client\ApiClient($config);
$assignments_api = new \Swagger\Client\Api\AssignmentsApi($api_client);
$reports_api = new \Swagger\Client\Api\ReportsApi($api_client);
$success = false;
$attempts = 0;
$result = null;
while (!$success && $attempts < 3) {
try{
plagiarism_vericite_log("VeriCite API call: " . $action . ", attempt: " . $attempts . ", args: \n" . serialize($args));
switch ($action) {
case PLAGIARISM_VERICITE_ACTION_ASSIGNMENTS:
$result = $assignments_api->createUpdateAssignment($args['context_id'], $args['assignment_id'], $args['consumer'], $args['consumer_secret'], $args['assignment_data']);
break;
case PLAGIARISM_VERICITE_ACTION_REPORTS_SUBMIT_REQUEST:
$result = $reports_api->submitRequest($args['context_id'], $args['assignment_id'], $args['user_id'], $args['consumer'], $args['consumer_secret'], $args['report_meta_data'], null, "true", $args['product_family_code'], $args['product_tool_code']);
break;
case PLAGIARISM_VERICITE_ACTION_REPORTS_SCORES:
$result = $reports_api->getScores($args['context_id'], $args['consumer'], $args['consumer_secret'], $args['assignment_id'], $args['user_id'], $args['external_content_id']);
break;
case PLAGIARISM_VERICITE_ACTION_REPORTS_URLS:
$result = $reports_api->getReportUrls($args['context_id'], $args['assignment_id_filter'], $args['consumer'], $args['consumer_secret'], $args['token_user'], $args['token_user_role'], $args['token_user_first_name'], $args['token_user_last_name'], $args['token_user_email'], $args['user_id_filter'], $args['external_content_id_filter']);
break;
}
$success = true;
}catch (Exception $e) {
plagiarism_vericite_log("VeriCite API Exception", $e);
}
$attempts++;
}
if (!$success) {
$result = null;
}
plagiarism_vericite_log("VeriCite API call complete:\n" . serialize($result));
return $result;
}
function plagiarism_vericite_serialize_fields($fields) {
$fields_string = '';
foreach ($fields as $key=>$value) {
if (is_array($value)) {
$fields_string .= $key .'=' . json_encode($value) . '&';
} else {
$fields_string .= $key .'=' . $value . '&';
}
}
$fields_string = rtrim($fields_string, '&');
return $fields_string;
}
function plagiarism_vericite_curl_exec($ch) {
global $CFG;
if (!empty($CFG->proxyhost)) {
if (empty($CFG->proxyport)) {
curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost);
} else {
curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport);
}
if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword);
curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
}
if (!empty($CFG->proxytype)) {
if ($CFG->proxytype == 'SOCKS5') {
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
} else {
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, FALSE);
}
}
}
$result = null;
$attempts = 0;
$success = false;
do {
$result = curl_exec($ch);
$responseCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
plagiarism_vericite_log(curl_getinfo($ch, CURLINFO_HEADER_OUT));
plagiarism_vericite_log("attempts: " . $attempts . "; response code: " . $responseCode . "; result:\n" . $result);
if ($result === false || $responseCode != 200) {
// Make sure to return null so that the caller knows it failed.
$result = null;
$success = false;
} else {
// A request could time out, check for a result message error.
if (!empty($result) && (substr($result, 0, 1) === "{" || substr($result, 0, 1) === "[")) {
$result = json_decode($result);
if (isset($result->errorMessage)) {
// The request endpoint timed out, let's call again.
plagiarism_vericite_log($result->errorMessage);
$success = false;
$result = null;
} else if (isset($result->message) && strpos($result->message, "timed out") !== false) {
// The request endpoint timed out, let's call again.
plagiarism_vericite_log("timed out");
$success = false;
$result = null;
} else {
plagiarism_vericite_log("success 1");
$success = true;
// Make sure we return a non-empty result to show success.
if (empty($result)) {
$result = 1;
}
}
} else {