DenysMedvid/moodle-plagiarism_pchkorg
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moodle-plagiarism_pchkorg/classes/plagiarism_pchkorg_api_provider.php

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#14 - All Travis CI checks have been enabled. #13 - A validation has been added. #12 - File with events has been deleted. #11 - A file access.php has been rewritten. #10 - install.xml file has been rewritten by xmldb tool. #9 - A Class with Privacy definition has been created. #8 - All urls and paths have been wrapped with build-in class `moodle_url`. #7 - Check of `MOODLE_INTERNAL` constant has been added to each file where it was needed. #6 - All strings like this have been wrapped with `get_string` function. #5 - All native calls of `curl` have been replaced with moodle `curl` class. #4 - All classes have been renamed with moodle style naming. FileModel had been dropped. #3 - GPL License has been added to each file. #2 - Call of deprecated function has been replaced with a new one.
2019-01-17 16:51:22 +00:00
<?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/>.
defined('MOODLE_INTERNAL') || die();
class plagiarism_pchkorg_api_provider {
private $token;
/**
* @var string
*/
private $endpoint;
private $lasterror;
/**
* @return mixed
*/
public function get_last_error() {
return $this->lasterror;
}
/**
* @param mixed $lasterror
*/
public function set_last_error($lasterror) {
$this->lasterror = $lasterror;
}
public function __construct($token, $endpoint = 'https://plagiarismcheck.org') {
$this->token = $token;
$this->endpoint = $endpoint;
}
public function send_group_text($authorhash, $cousereid, $assignmentid, $submissionid, $attachmentid, $content, $mime,
$filename) {
$boundary = sprintf('PLAGCHECKBOUNDARY-%s', uniqid(time()));
$curl = new curl();
$response = $curl->post(
$this->endpoint . '/lms/moodle/check-text/',
$this->get_body_for_group(
$boundary,
$authorhash,
$cousereid,
$assignmentid,
$submissionid,
$attachmentid,
$content,
$mime,
$filename),
array(
'CURLOPT_RETURNTRANSFER' => true,
'CURLOPT_FOLLOWLOCATION' => true,
'CURLOPT_SSL_VERIFYHOST' => false,
'CURLOPT_SSL_VERIFYPEER' => false,
'CURLOPT_HTTPHEADER' => array(
'X-API-TOKEN: ' . $this->generate_api_token(),
'Content-Type: multipart/form-data; boundary=' . $boundary
),
)
);
$id = null;
if ($json = json_decode($response)) {
if (isset($json->message)) {
$this->set_last_error($json->message);
return null;
}
if (isset($json->success) && $json->success) {
$id = $json->data->text->id;
}
}
return $id;
}
private function get_body_for_group($boundary,
$authorhash,
$cousereid,
$assignmentid,
$submissionid,
$attachmentid,
$content,
$mime,
$filename) {
$eol = "\r\n";
$body = '';
$body .= $this->get_part('token', $this->token, $boundary);
$body .= $this->get_part('hash', $authorhash, $boundary);
$body .= $this->get_part('course_id', $cousereid, $boundary);
$body .= $this->get_part('assignment_id', $assignmentid, $boundary);
$body .= $this->get_part('submission_id', $submissionid, $boundary);
$body .= $this->get_part('attachment_id', $attachmentid, $boundary);
$body .= $this->get_part('filename', $filename, $boundary);
$body .= $this->get_part('language', 'en', $boundary);
$body .= $this->get_file_part('content', $content, $mime, $filename, $boundary);
$body .= '--' . $boundary . '--' . $eol;
return $body;
}
public function send_text($content, $mime, $filename) {
$boundary = sprintf('PLAGCHECKBOUNDARY-%s', uniqid(time()));
$curl = new curl();
$response = $curl->post(
$this->endpoint . '/api/v1/text',
$this->get_body($boundary, $content, $mime, $filename),
array(
'CURLOPT_RETURNTRANSFER' => true,
'CURLOPT_FOLLOWLOCATION' => true,
'CURLOPT_SSL_VERIFYHOST' => false,
'CURLOPT_SSL_VERIFYPEER' => false,
'CURLOPT_POST' => true,
'CURLOPT_HTTPHEADER' => array(
'X-API-TOKEN: ' . $this->generate_api_token(),
'Content-Type: multipart/form-data; boundary=' . $boundary
),
)
);
$id = null;
if ($json = json_decode($response)) {
if (isset($json->message)) {
$this->set_last_error($json->message);
return null;
}
if (isset($json->success) && $json->success) {
$id = $json->data->text->id;
}
}
return $id;
}
private function get_part($name, $value, $boundary) {
$eol = "\r\n";
$part = '--' . $boundary . $eol;
$part .= 'Content-Disposition: form-data; name="' . $name . '"' . $eol . $eol;
$part .= $value . $eol;
return $part;
}
private function get_file_part($name, $value, $mime, $filename, $boundary) {
$eol = "\r\n";
$part = '--' . $boundary . $eol;
$part .= 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $filename . '";' . $eol;
$part .= 'Content-Type: ' . $mime . $eol;
$part .= 'Content-Length: ' . strlen($value) . $eol . $eol;
$part .= $value . $eol;
return $part;
}
private function get_body($boundary, $content, $mime, $filename) {
$eol = "\r\n";
$body = '';
$body .= $this->get_part('language', 'en', $boundary);
$body .= $this->get_file_part('text', $content, $mime, $filename, $boundary);
$body .= '--' . $boundary . '--' . $eol;
return $body;
}
public function user_email_to_hash($email) {
return hash('sha256', $this->token . $email);
}
public function is_group_token() {
return 'G-' === \substr($this->token, 0, 2);
}
public function is_group_member($email = '') {
if (!$this->is_group_token()) {
return true;
}
$curl = new curl();
$response = $curl->post($this->endpoint . '/lms/moodle/is-group-member/', array(
'token' => $this->token,
'hash' => $this->user_email_to_hash($email)
), array(
'CURLOPT_RETURNTRANSFER' => true,
'CURLOPT_FOLLOWLOCATION' => true,
'CURLOPT_SSL_VERIFYHOST' => false,
'CURLOPT_SSL_VERIFYPEER' => false,
));
if ($json = json_decode($response)) {
if (true == $json->is_member) {
return true;
}
}
return false;
}
public function check_text($textid) {
$curl = new curl();
$response = $curl->get($this->endpoint . '/api/v1/text/' . $textid, array(), array(
'CURLOPT_RETURNTRANSFER' => true,
'CURLOPT_FOLLOWLOCATION' => true,
'CURLOPT_SSL_VERIFYHOST' => false,
'CURLOPT_SSL_VERIFYPEER' => false,
'CURLOPT_POST' => false,
'CURLOPT_HTTPHEADER' => array(
'X-API-TOKEN: ' . $this->generate_api_token(),
'Content-Type: application/x-www-form-urlencoded'
),
));
$id = null;
if ($json = json_decode($response)) {
if (isset($json->data) && 5 == $json->data->state) {
$id = $json->data->report->id;
}
}
return $id;
}
public function get_report($id) {
$curl = new curl();
$response = $curl->get($this->endpoint . '/api/v1/text/report/' . $id, array(), array(
'CURLOPT_RETURNTRANSFER' => true,
'CURLOPT_FOLLOWLOCATION' => true,
'CURLOPT_SSL_VERIFYHOST' => false,
'CURLOPT_SSL_VERIFYPEER' => false,
'CURLOPT_POST' => false,
'CURLOPT_HTTPHEADER' => array(
'X-API-TOKEN: ' . $this->generate_api_token(),
),
));
return $response;
}
private function generate_api_token() {
global $USER;
if ($this->is_group_token()) {
return $this->token . '::' . hash('sha256', $this->token . $USER->email);
}
return $this->token;
}
public function is_supported_mime($mime) {
return in_array($mime, array(
'application/msword',
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/rtf',
'application/vnd.oasis.opendocument.text',
'text/plain',
'application/pdf',
), true);
}
}
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