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moodle/mod/quiz/classes/external.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/>.
/**
* Quiz external API
*
* @package mod_quiz
* @category external
* @copyright 2016 Juan Leyva <juan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 3.1
*/
defined('MOODLE_INTERNAL') || die;
require_once($CFG->libdir . '/externallib.php');
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
/**
* Quiz external functions
*
* @package mod_quiz
* @category external
* @copyright 2016 Juan Leyva <juan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 3.1
*/
class mod_quiz_external extends external_api {
/**
* Describes the parameters for get_quizzes_by_courses.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_quizzes_by_courses_parameters() {
return new external_function_parameters (
array(
'courseids' => new external_multiple_structure(
new external_value(PARAM_INT, 'course id'), 'Array of course ids', VALUE_DEFAULT, array()
),
)
);
}
/**
* Returns a list of quizzes in a provided list of courses,
* if no list is provided all quizzes that the user can view will be returned.
*
* @param array $courseids Array of course ids
* @return array of quizzes details
* @since Moodle 3.1
*/
public static function get_quizzes_by_courses($courseids = array()) {
global $USER;
$warnings = array();
$returnedquizzes = array();
$params = array(
'courseids' => $courseids,
);
$params = self::validate_parameters(self::get_quizzes_by_courses_parameters(), $params);
$mycourses = array();
if (empty($params['courseids'])) {
$mycourses = enrol_get_my_courses();
$params['courseids'] = array_keys($mycourses);
}
// Ensure there are courseids to loop through.
if (!empty($params['courseids'])) {
list($courses, $warnings) = external_util::validate_courses($params['courseids'], $mycourses);
// Get the quizzes in this course, this function checks users visibility permissions.
// We can avoid then additional validate_context calls.
$quizzes = get_all_instances_in_courses("quiz", $courses);
foreach ($quizzes as $quiz) {
$context = context_module::instance($quiz->coursemodule);
// Update quiz with override information.
$quiz = quiz_update_effective_access($quiz, $USER->id);
// Entry to return.
$quizdetails = array();
// First, we return information that any user can see in the web interface.
$quizdetails['id'] = $quiz->id;
$quizdetails['coursemodule'] = $quiz->coursemodule;
$quizdetails['course'] = $quiz->course;
$quizdetails['name'] = external_format_string($quiz->name, $context->id);
if (has_capability('mod/quiz:view', $context)) {
// Format intro.
list($quizdetails['intro'], $quizdetails['introformat']) = external_format_text($quiz->intro,
$quiz->introformat, $context->id, 'mod_quiz', 'intro', null);
$quizdetails['introfiles'] = external_util::get_area_files($context->id, 'mod_quiz', 'intro', false, false);
$viewablefields = array('timeopen', 'timeclose', 'grademethod', 'section', 'visible', 'groupmode',
'groupingid', 'attempts', 'timelimit', 'grademethod', 'decimalpoints',
'questiondecimalpoints', 'sumgrades', 'grade', 'preferredbehaviour');
// Some times this function returns just empty.
$hasfeedback = quiz_has_feedback($quiz);
$quizdetails['hasfeedback'] = (!empty($hasfeedback)) ? 1 : 0;
$timenow = time();
$quizobj = quiz::create($quiz->id, $USER->id);
$accessmanager = new quiz_access_manager($quizobj, $timenow, has_capability('mod/quiz:ignoretimelimits',
$context, null, false));
// Fields the user could see if have access to the quiz.
if (!$accessmanager->prevent_access()) {
$quizdetails['hasquestions'] = (int) $quizobj->has_questions();
$quizdetails['autosaveperiod'] = get_config('quiz', 'autosaveperiod');
$additionalfields = array('attemptonlast', 'reviewattempt', 'reviewcorrectness', 'reviewmarks',
'reviewspecificfeedback', 'reviewgeneralfeedback', 'reviewrightanswer',
'reviewoverallfeedback', 'questionsperpage', 'navmethod',
'browsersecurity', 'delay1', 'delay2', 'showuserpicture', 'showblocks',
'completionattemptsexhausted', 'completionpass', 'overduehandling',
'graceperiod', 'canredoquestions', 'allowofflineattempts');
$viewablefields = array_merge($viewablefields, $additionalfields);
}
// Fields only for managers.
if (has_capability('moodle/course:manageactivities', $context)) {
$additionalfields = array('shuffleanswers', 'timecreated', 'timemodified', 'password', 'subnet');
$viewablefields = array_merge($viewablefields, $additionalfields);
}
foreach ($viewablefields as $field) {
$quizdetails[$field] = $quiz->{$field};
}
}
$returnedquizzes[] = $quizdetails;
}
}
$result = array();
$result['quizzes'] = $returnedquizzes;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_quizzes_by_courses return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_quizzes_by_courses_returns() {
return new external_single_structure(
array(
'quizzes' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'Standard Moodle primary key.'),
'course' => new external_value(PARAM_INT, 'Foreign key reference to the course this quiz is part of.'),
'coursemodule' => new external_value(PARAM_INT, 'Course module id.'),
'name' => new external_value(PARAM_RAW, 'Quiz name.'),
'intro' => new external_value(PARAM_RAW, 'Quiz introduction text.', VALUE_OPTIONAL),
'introformat' => new external_format_value('intro', VALUE_OPTIONAL),
'introfiles' => new external_files('Files in the introduction text', VALUE_OPTIONAL),
'timeopen' => new external_value(PARAM_INT, 'The time when this quiz opens. (0 = no restriction.)',
VALUE_OPTIONAL),
'timeclose' => new external_value(PARAM_INT, 'The time when this quiz closes. (0 = no restriction.)',
VALUE_OPTIONAL),
'timelimit' => new external_value(PARAM_INT, 'The time limit for quiz attempts, in seconds.',
VALUE_OPTIONAL),
'overduehandling' => new external_value(PARAM_ALPHA, 'The method used to handle overdue attempts.
\'autosubmit\', \'graceperiod\' or \'autoabandon\'.',
VALUE_OPTIONAL),
'graceperiod' => new external_value(PARAM_INT, 'The amount of time (in seconds) after the time limit
runs out during which attempts can still be submitted,
if overduehandling is set to allow it.', VALUE_OPTIONAL),
'preferredbehaviour' => new external_value(PARAM_ALPHANUMEXT, 'The behaviour to ask questions to use.',
VALUE_OPTIONAL),
'canredoquestions' => new external_value(PARAM_INT, 'Allows students to redo any completed question
within a quiz attempt.', VALUE_OPTIONAL),
'attempts' => new external_value(PARAM_INT, 'The maximum number of attempts a student is allowed.',
VALUE_OPTIONAL),
'attemptonlast' => new external_value(PARAM_INT, 'Whether subsequent attempts start from the answer
to the previous attempt (1) or start blank (0).',
VALUE_OPTIONAL),
'grademethod' => new external_value(PARAM_INT, 'One of the values QUIZ_GRADEHIGHEST, QUIZ_GRADEAVERAGE,
QUIZ_ATTEMPTFIRST or QUIZ_ATTEMPTLAST.', VALUE_OPTIONAL),
'decimalpoints' => new external_value(PARAM_INT, 'Number of decimal points to use when displaying
grades.', VALUE_OPTIONAL),
'questiondecimalpoints' => new external_value(PARAM_INT, 'Number of decimal points to use when
displaying question grades.
(-1 means use decimalpoints.)', VALUE_OPTIONAL),
'reviewattempt' => new external_value(PARAM_INT, 'Whether users are allowed to review their quiz
attempts at various times. This is a bit field, decoded by the
mod_quiz_display_options class. It is formed by ORing together
the constants defined there.', VALUE_OPTIONAL),
'reviewcorrectness' => new external_value(PARAM_INT, 'Whether users are allowed to review their quiz
attempts at various times.
A bit field, like reviewattempt.', VALUE_OPTIONAL),
'reviewmarks' => new external_value(PARAM_INT, 'Whether users are allowed to review their quiz attempts
at various times. A bit field, like reviewattempt.',
VALUE_OPTIONAL),
'reviewspecificfeedback' => new external_value(PARAM_INT, 'Whether users are allowed to review their
quiz attempts at various times. A bit field, like
reviewattempt.', VALUE_OPTIONAL),
'reviewgeneralfeedback' => new external_value(PARAM_INT, 'Whether users are allowed to review their
quiz attempts at various times. A bit field, like
reviewattempt.', VALUE_OPTIONAL),
'reviewrightanswer' => new external_value(PARAM_INT, 'Whether users are allowed to review their quiz
attempts at various times. A bit field, like
reviewattempt.', VALUE_OPTIONAL),
'reviewoverallfeedback' => new external_value(PARAM_INT, 'Whether users are allowed to review their quiz
attempts at various times. A bit field, like
reviewattempt.', VALUE_OPTIONAL),
'questionsperpage' => new external_value(PARAM_INT, 'How often to insert a page break when editing
the quiz, or when shuffling the question order.',
VALUE_OPTIONAL),
'navmethod' => new external_value(PARAM_ALPHA, 'Any constraints on how the user is allowed to navigate
around the quiz. Currently recognised values are
\'free\' and \'seq\'.', VALUE_OPTIONAL),
'shuffleanswers' => new external_value(PARAM_INT, 'Whether the parts of the question should be shuffled,
in those question types that support it.', VALUE_OPTIONAL),
'sumgrades' => new external_value(PARAM_FLOAT, 'The total of all the question instance maxmarks.',
VALUE_OPTIONAL),
'grade' => new external_value(PARAM_FLOAT, 'The total that the quiz overall grade is scaled to be
out of.', VALUE_OPTIONAL),
'timecreated' => new external_value(PARAM_INT, 'The time when the quiz was added to the course.',
VALUE_OPTIONAL),
'timemodified' => new external_value(PARAM_INT, 'Last modified time.',
VALUE_OPTIONAL),
'password' => new external_value(PARAM_RAW, 'A password that the student must enter before starting or
continuing a quiz attempt.', VALUE_OPTIONAL),
'subnet' => new external_value(PARAM_RAW, 'Used to restrict the IP addresses from which this quiz can
be attempted. The format is as requried by the address_in_subnet
function.', VALUE_OPTIONAL),
'browsersecurity' => new external_value(PARAM_ALPHANUMEXT, 'Restriciton on the browser the student must
use. E.g. \'securewindow\'.', VALUE_OPTIONAL),
'delay1' => new external_value(PARAM_INT, 'Delay that must be left between the first and second attempt,
in seconds.', VALUE_OPTIONAL),
'delay2' => new external_value(PARAM_INT, 'Delay that must be left between the second and subsequent
attempt, in seconds.', VALUE_OPTIONAL),
'showuserpicture' => new external_value(PARAM_INT, 'Option to show the user\'s picture during the
attempt and on the review page.', VALUE_OPTIONAL),
'showblocks' => new external_value(PARAM_INT, 'Whether blocks should be shown on the attempt.php and
review.php pages.', VALUE_OPTIONAL),
'completionattemptsexhausted' => new external_value(PARAM_INT, 'Mark quiz complete when the student has
exhausted the maximum number of attempts',
VALUE_OPTIONAL),
'completionpass' => new external_value(PARAM_INT, 'Whether to require passing grade', VALUE_OPTIONAL),
'allowofflineattempts' => new external_value(PARAM_INT, 'Whether to allow the quiz to be attempted
offline in the mobile app', VALUE_OPTIONAL),
'autosaveperiod' => new external_value(PARAM_INT, 'Auto-save delay', VALUE_OPTIONAL),
'hasfeedback' => new external_value(PARAM_INT, 'Whether the quiz has any non-blank feedback text',
VALUE_OPTIONAL),
'hasquestions' => new external_value(PARAM_INT, 'Whether the quiz has questions', VALUE_OPTIONAL),
'section' => new external_value(PARAM_INT, 'Course section id', VALUE_OPTIONAL),
'visible' => new external_value(PARAM_INT, 'Module visibility', VALUE_OPTIONAL),
'groupmode' => new external_value(PARAM_INT, 'Group mode', VALUE_OPTIONAL),
'groupingid' => new external_value(PARAM_INT, 'Grouping id', VALUE_OPTIONAL),
)
)
),
'warnings' => new external_warnings(),
)
);
}
/**
* Utility function for validating a quiz.
*
* @param int $quizid quiz instance id
* @return array array containing the quiz, course, context and course module objects
* @since Moodle 3.1
*/
protected static function validate_quiz($quizid) {
global $DB;
// Request and permission validation.
$quiz = $DB->get_record('quiz', array('id' => $quizid), '*', MUST_EXIST);
list($course, $cm) = get_course_and_cm_from_instance($quiz, 'quiz');
$context = context_module::instance($cm->id);
self::validate_context($context);
return array($quiz, $course, $cm, $context);
}
/**
* Describes the parameters for view_quiz.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function view_quiz_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
)
);
}
/**
* Trigger the course module viewed event and update the module completion status.
*
* @param int $quizid quiz instance id
* @return array of warnings and status result
* @since Moodle 3.1
* @throws moodle_exception
*/
public static function view_quiz($quizid) {
global $DB;
$params = self::validate_parameters(self::view_quiz_parameters(), array('quizid' => $quizid));
$warnings = array();
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
// Trigger course_module_viewed event and completion.
quiz_view($quiz, $course, $cm, $context);
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the view_quiz return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function view_quiz_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status: true if success'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_user_attempts.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_user_attempts_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'userid' => new external_value(PARAM_INT, 'user id, empty for current user', VALUE_DEFAULT, 0),
'status' => new external_value(PARAM_ALPHA, 'quiz status: all, finished or unfinished', VALUE_DEFAULT, 'finished'),
'includepreviews' => new external_value(PARAM_BOOL, 'whether to include previews or not', VALUE_DEFAULT, false),
)
);
}
/**
* Return a list of attempts for the given quiz and user.
*
* @param int $quizid quiz instance id
* @param int $userid user id
* @param string $status quiz status: all, finished or unfinished
* @param bool $includepreviews whether to include previews or not
* @return array of warnings and the list of attempts
* @since Moodle 3.1
* @throws invalid_parameter_exception
*/
public static function get_user_attempts($quizid, $userid = 0, $status = 'finished', $includepreviews = false) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid,
'userid' => $userid,
'status' => $status,
'includepreviews' => $includepreviews,
);
$params = self::validate_parameters(self::get_user_attempts_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
if (!in_array($params['status'], array('all', 'finished', 'unfinished'))) {
throw new invalid_parameter_exception('Invalid status value');
}
// Default value for userid.
if (empty($params['userid'])) {
$params['userid'] = $USER->id;
}
$user = core_user::get_user($params['userid'], '*', MUST_EXIST);
core_user::require_active_user($user);
// Extra checks so only users with permissions can view other users attempts.
if ($USER->id != $user->id) {
require_capability('mod/quiz:viewreports', $context);
}
$attempts = quiz_get_user_attempts($quiz->id, $user->id, $params['status'], $params['includepreviews']);
$result = array();
$result['attempts'] = $attempts;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes a single attempt structure.
*
* @return external_single_structure the attempt structure
*/
private static function attempt_structure() {
return new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'Attempt id.', VALUE_OPTIONAL),
'quiz' => new external_value(PARAM_INT, 'Foreign key reference to the quiz that was attempted.',
VALUE_OPTIONAL),
'userid' => new external_value(PARAM_INT, 'Foreign key reference to the user whose attempt this is.',
VALUE_OPTIONAL),
'attempt' => new external_value(PARAM_INT, 'Sequentially numbers this students attempts at this quiz.',
VALUE_OPTIONAL),
'uniqueid' => new external_value(PARAM_INT, 'Foreign key reference to the question_usage that holds the
details of the the question_attempts that make up this quiz
attempt.', VALUE_OPTIONAL),
'layout' => new external_value(PARAM_RAW, 'Attempt layout.', VALUE_OPTIONAL),
'currentpage' => new external_value(PARAM_INT, 'Attempt current page.', VALUE_OPTIONAL),
'preview' => new external_value(PARAM_INT, 'Whether is a preview attempt or not.', VALUE_OPTIONAL),
'state' => new external_value(PARAM_ALPHA, 'The current state of the attempts. \'inprogress\',
\'overdue\', \'finished\' or \'abandoned\'.', VALUE_OPTIONAL),
'timestart' => new external_value(PARAM_INT, 'Time when the attempt was started.', VALUE_OPTIONAL),
'timefinish' => new external_value(PARAM_INT, 'Time when the attempt was submitted.
0 if the attempt has not been submitted yet.', VALUE_OPTIONAL),
'timemodified' => new external_value(PARAM_INT, 'Last modified time.', VALUE_OPTIONAL),
'timemodifiedoffline' => new external_value(PARAM_INT, 'Last modified time via webservices.', VALUE_OPTIONAL),
'timecheckstate' => new external_value(PARAM_INT, 'Next time quiz cron should check attempt for
state changes. NULL means never check.', VALUE_OPTIONAL),
'sumgrades' => new external_value(PARAM_FLOAT, 'Total marks for this attempt.', VALUE_OPTIONAL),
)
);
}
/**
* Describes the get_user_attempts return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_user_attempts_returns() {
return new external_single_structure(
array(
'attempts' => new external_multiple_structure(self::attempt_structure()),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_user_best_grade.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_user_best_grade_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'userid' => new external_value(PARAM_INT, 'user id', VALUE_DEFAULT, 0),
)
);
}
/**
* Get the best current grade for the given user on a quiz.
*
* @param int $quizid quiz instance id
* @param int $userid user id
* @return array of warnings and the grade information
* @since Moodle 3.1
*/
public static function get_user_best_grade($quizid, $userid = 0) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid,
'userid' => $userid,
);
$params = self::validate_parameters(self::get_user_best_grade_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
// Default value for userid.
if (empty($params['userid'])) {
$params['userid'] = $USER->id;
}
$user = core_user::get_user($params['userid'], '*', MUST_EXIST);
core_user::require_active_user($user);
// Extra checks so only users with permissions can view other users attempts.
if ($USER->id != $user->id) {
require_capability('mod/quiz:viewreports', $context);
}
$result = array();
$grade = quiz_get_best_grade($quiz, $user->id);
if ($grade === null) {
$result['hasgrade'] = false;
} else {
$result['hasgrade'] = true;
$result['grade'] = $grade;
}
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_user_best_grade return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_user_best_grade_returns() {
return new external_single_structure(
array(
'hasgrade' => new external_value(PARAM_BOOL, 'Whether the user has a grade on the given quiz.'),
'grade' => new external_value(PARAM_FLOAT, 'The grade (only if the user has a grade).', VALUE_OPTIONAL),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_combined_review_options.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_combined_review_options_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'userid' => new external_value(PARAM_INT, 'user id (empty for current user)', VALUE_DEFAULT, 0),
)
);
}
/**
* Combines the review options from a number of different quiz attempts.
*
* @param int $quizid quiz instance id
* @param int $userid user id (empty for current user)
* @return array of warnings and the review options
* @since Moodle 3.1
*/
public static function get_combined_review_options($quizid, $userid = 0) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid,
'userid' => $userid,
);
$params = self::validate_parameters(self::get_combined_review_options_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
// Default value for userid.
if (empty($params['userid'])) {
$params['userid'] = $USER->id;
}
$user = core_user::get_user($params['userid'], '*', MUST_EXIST);
core_user::require_active_user($user);
// Extra checks so only users with permissions can view other users attempts.
if ($USER->id != $user->id) {
require_capability('mod/quiz:viewreports', $context);
}
$attempts = quiz_get_user_attempts($quiz->id, $user->id, 'all', true);
$result = array();
$result['someoptions'] = [];
$result['alloptions'] = [];
list($someoptions, $alloptions) = quiz_get_combined_reviewoptions($quiz, $attempts);
foreach (array('someoptions', 'alloptions') as $typeofoption) {
foreach ($$typeofoption as $key => $value) {
$result[$typeofoption][] = array(
"name" => $key,
"value" => (!empty($value)) ? $value : 0
);
}
}
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_combined_review_options return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_combined_review_options_returns() {
return new external_single_structure(
array(
'someoptions' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
'value' => new external_value(PARAM_INT, 'option value'),
)
)
),
'alloptions' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
'value' => new external_value(PARAM_INT, 'option value'),
)
)
),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for start_attempt.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function start_attempt_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
),
'forcenew' => new external_value(PARAM_BOOL, 'Whether to force a new attempt or not.', VALUE_DEFAULT, false),
)
);
}
/**
* Starts a new attempt at a quiz.
*
* @param int $quizid quiz instance id
* @param array $preflightdata preflight required data (like passwords)
* @param bool $forcenew Whether to force a new attempt or not.
* @return array of warnings and the attempt basic data
* @since Moodle 3.1
* @throws moodle_quiz_exception
*/
public static function start_attempt($quizid, $preflightdata = array(), $forcenew = false) {
global $DB, $USER;
$warnings = array();
$attempt = array();
$params = array(
'quizid' => $quizid,
'preflightdata' => $preflightdata,
'forcenew' => $forcenew,
);
$params = self::validate_parameters(self::start_attempt_parameters(), $params);
$forcenew = $params['forcenew'];
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
$quizobj = quiz::create($cm->instance, $USER->id);
// Check questions.
if (!$quizobj->has_questions()) {
throw new moodle_quiz_exception($quizobj, 'noquestionsfound');
}
// Create an object to manage all the other (non-roles) access rules.
$timenow = time();
$accessmanager = $quizobj->get_access_manager($timenow);
// Validate permissions for creating a new attempt and start a new preview attempt if required.
list($currentattemptid, $attemptnumber, $lastattempt, $messages, $page) =
quiz_validate_new_attempt($quizobj, $accessmanager, $forcenew, -1, false);
// Check access.
if (!$quizobj->is_preview_user() && $messages) {
// Create warnings with the exact messages.
foreach ($messages as $message) {
$warnings[] = array(
'item' => 'quiz',
'itemid' => $quiz->id,
'warningcode' => '1',
'message' => clean_text($message, PARAM_TEXT)
);
}
} else {
if ($accessmanager->is_preflight_check_required($currentattemptid)) {
// Need to do some checks before allowing the user to continue.
$provideddata = array();
foreach ($params['preflightdata'] as $data) {
$provideddata[$data['name']] = $data['value'];
}
$errors = $accessmanager->validate_preflight_check($provideddata, [], $currentattemptid);
if (!empty($errors)) {
throw new moodle_quiz_exception($quizobj, array_shift($errors));
}
// Pre-flight check passed.
$accessmanager->notify_preflight_check_passed($currentattemptid);
}
if ($currentattemptid) {
if ($lastattempt->state == quiz_attempt::OVERDUE) {
throw new moodle_quiz_exception($quizobj, 'stateoverdue');
} else {
throw new moodle_quiz_exception($quizobj, 'attemptstillinprogress');
}
}
$offlineattempt = WS_SERVER ? true : false;
$attempt = quiz_prepare_and_start_new_attempt($quizobj, $attemptnumber, $lastattempt, $offlineattempt);
}
$result = array();
$result['attempt'] = $attempt;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the start_attempt return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function start_attempt_returns() {
return new external_single_structure(
array(
'attempt' => self::attempt_structure(),
'warnings' => new external_warnings(),
)
);
}
/**
* Utility function for validating a given attempt
*
* @param array $params array of parameters including the attemptid and preflight data
* @param bool $checkaccessrules whether to check the quiz access rules or not
* @param bool $failifoverdue whether to return error if the attempt is overdue
* @return array containing the attempt object and access messages
* @throws moodle_quiz_exception
* @since Moodle 3.1
*/
protected static function validate_attempt($params, $checkaccessrules = true, $failifoverdue = true) {
global $USER;
$attemptobj = quiz_attempt::create($params['attemptid']);
$context = context_module::instance($attemptobj->get_cm()->id);
self::validate_context($context);
// Check that this attempt belongs to this user.
if ($attemptobj->get_userid() != $USER->id) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'notyourattempt');
}
// General capabilities check.
$ispreviewuser = $attemptobj->is_preview_user();
if (!$ispreviewuser) {
$attemptobj->require_capability('mod/quiz:attempt');
}
// Check the access rules.
$accessmanager = $attemptobj->get_access_manager(time());
$messages = array();
if ($checkaccessrules) {
// If the attempt is now overdue, or abandoned, deal with that.
$attemptobj->handle_if_time_expired(time(), true);
$messages = $accessmanager->prevent_access();
if (!$ispreviewuser && $messages) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'attempterror');
}
}
// Attempt closed?.
if ($attemptobj->is_finished()) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'attemptalreadyclosed');
} else if ($failifoverdue && $attemptobj->get_state() == quiz_attempt::OVERDUE) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'stateoverdue');
}
// User submitted data (like the quiz password).
if ($accessmanager->is_preflight_check_required($attemptobj->get_attemptid())) {
$provideddata = array();
foreach ($params['preflightdata'] as $data) {
$provideddata[$data['name']] = $data['value'];
}
$errors = $accessmanager->validate_preflight_check($provideddata, [], $params['attemptid']);
if (!empty($errors)) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), array_shift($errors));
}
// Pre-flight check passed.
$accessmanager->notify_preflight_check_passed($params['attemptid']);
}
if (isset($params['page'])) {
// Check if the page is out of range.
if ($params['page'] != $attemptobj->force_page_number_into_range($params['page'])) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'Invalid page number');
}
// Prevent out of sequence access.
if (!$attemptobj->check_page_access($params['page'])) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'Out of sequence access');
}
// Check slots.
$slots = $attemptobj->get_slots($params['page']);
if (empty($slots)) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'noquestionsfound');
}
}
return array($attemptobj, $messages);
}
/**
* Describes a single question structure.
*
* @return external_single_structure the question data. Some fields may not be returned depending on the quiz display settings.
* @since Moodle 3.1
* @since Moodle 3.2 blockedbyprevious parameter added.
*/
private static function question_structure() {
return new external_single_structure(
array(
'slot' => new external_value(PARAM_INT, 'slot number'),
'type' => new external_value(PARAM_ALPHANUMEXT, 'question type, i.e: multichoice'),
'page' => new external_value(PARAM_INT, 'page of the quiz this question appears on'),
'html' => new external_value(PARAM_RAW, 'the question rendered'),
'sequencecheck' => new external_value(PARAM_INT, 'the number of real steps in this attempt', VALUE_OPTIONAL),
'lastactiontime' => new external_value(PARAM_INT, 'the timestamp of the most recent step in this question attempt',
VALUE_OPTIONAL),
'hasautosavedstep' => new external_value(PARAM_BOOL, 'whether this question attempt has autosaved data',
VALUE_OPTIONAL),
'flagged' => new external_value(PARAM_BOOL, 'whether the question is flagged or not'),
'number' => new external_value(PARAM_INT, 'question ordering number in the quiz', VALUE_OPTIONAL),
'state' => new external_value(PARAM_ALPHA, 'the state where the question is in.
It will not be returned if the user cannot see it due to the quiz display correctness settings.',
VALUE_OPTIONAL),
'status' => new external_value(PARAM_RAW, 'current formatted state of the question', VALUE_OPTIONAL),
'blockedbyprevious' => new external_value(PARAM_BOOL, 'whether the question is blocked by the previous question',
VALUE_OPTIONAL),
'mark' => new external_value(PARAM_RAW, 'the mark awarded.
It will be returned only if the user is allowed to see it.', VALUE_OPTIONAL),
'maxmark' => new external_value(PARAM_FLOAT, 'the maximum mark possible for this question attempt.
It will be returned only if the user is allowed to see it.', VALUE_OPTIONAL),
),
'The question data. Some fields may not be returned depending on the quiz display settings.'
);
}
/**
* Return questions information for a given attempt.
*
* @param quiz_attempt $attemptobj the quiz attempt object
* @param bool $review whether if we are in review mode or not
* @param mixed $page string 'all' or integer page number
* @return array array of questions including data
*/
private static function get_attempt_questions_data(quiz_attempt $attemptobj, $review, $page = 'all') {
global $PAGE;
$questions = array();
$contextid = $attemptobj->get_quizobj()->get_context()->id;
$displayoptions = $attemptobj->get_display_options($review);
$renderer = $PAGE->get_renderer('mod_quiz');
foreach ($attemptobj->get_slots($page) as $slot) {
$question = array(
'slot' => $slot,
'type' => $attemptobj->get_question_type_name($slot),
'page' => $attemptobj->get_question_page($slot),
'flagged' => $attemptobj->is_question_flagged($slot),
'html' => $attemptobj->render_question($slot, $review, $renderer) . $PAGE->requires->get_end_code(),
'sequencecheck' => $attemptobj->get_question_attempt($slot)->get_sequence_check_count(),
'lastactiontime' => $attemptobj->get_question_attempt($slot)->get_last_step()->get_timecreated(),
'hasautosavedstep' => $attemptobj->get_question_attempt($slot)->has_autosaved_step()
);
if ($attemptobj->is_real_question($slot)) {
$question['number'] = $attemptobj->get_question_number($slot);
$showcorrectness = $displayoptions->correctness && $attemptobj->get_question_attempt($slot)->has_marks();
if ($showcorrectness) {
$question['state'] = (string) $attemptobj->get_question_state($slot);
}
$question['status'] = $attemptobj->get_question_status($slot, $displayoptions->correctness);
$question['blockedbyprevious'] = $attemptobj->is_blocked_by_previous_question($slot);
}
if ($displayoptions->marks >= question_display_options::MAX_ONLY) {
$question['maxmark'] = $attemptobj->get_question_attempt($slot)->get_max_mark();
}
if ($displayoptions->marks >= question_display_options::MARK_AND_MAX) {
$question['mark'] = $attemptobj->get_question_mark($slot);
}
$questions[] = $question;
}
return $questions;
}
/**
* Describes the parameters for get_attempt_data.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_attempt_data_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'page' => new external_value(PARAM_INT, 'page number'),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Returns information for the given attempt page for a quiz attempt in progress.
*
* @param int $attemptid attempt id
* @param int $page page number
* @param array $preflightdata preflight required data (like passwords)
* @return array of warnings and the attempt data, next page, message and questions
* @since Moodle 3.1
* @throws moodle_quiz_exceptions
*/
public static function get_attempt_data($attemptid, $page, $preflightdata = array()) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'page' => $page,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::get_attempt_data_parameters(), $params);
list($attemptobj, $messages) = self::validate_attempt($params);
if ($attemptobj->is_last_page($params['page'])) {
$nextpage = -1;
} else {
$nextpage = $params['page'] + 1;
}
$result = array();
$result['attempt'] = $attemptobj->get_attempt();
$result['messages'] = $messages;
$result['nextpage'] = $nextpage;
$result['warnings'] = $warnings;
$result['questions'] = self::get_attempt_questions_data($attemptobj, false, $params['page']);
return $result;
}
/**
* Describes the get_attempt_data return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_attempt_data_returns() {
return new external_single_structure(
array(
'attempt' => self::attempt_structure(),
'messages' => new external_multiple_structure(
new external_value(PARAM_TEXT, 'access message'),
'access messages, will only be returned for users with mod/quiz:preview capability,
for other users this method will throw an exception if there are messages'),
'nextpage' => new external_value(PARAM_INT, 'next page number'),
'questions' => new external_multiple_structure(self::question_structure()),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_attempt_summary.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_attempt_summary_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Returns a summary of a quiz attempt before it is submitted.
*
* @param int $attemptid attempt id
* @param int $preflightdata preflight required data (like passwords)
* @return array of warnings and the attempt summary data for each question
* @since Moodle 3.1
*/
public static function get_attempt_summary($attemptid, $preflightdata = array()) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::get_attempt_summary_parameters(), $params);
list($attemptobj, $messages) = self::validate_attempt($params, true, false);
$result = array();
$result['warnings'] = $warnings;
$result['questions'] = self::get_attempt_questions_data($attemptobj, false, 'all');
return $result;
}
/**
* Describes the get_attempt_summary return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_attempt_summary_returns() {
return new external_single_structure(
array(
'questions' => new external_multiple_structure(self::question_structure()),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for save_attempt.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function save_attempt_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'data' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_RAW, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'the data to be saved'
),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Processes save requests during the quiz. This function is intended for the quiz auto-save feature.
*
* @param int $attemptid attempt id
* @param array $data the data to be saved
* @param array $preflightdata preflight required data (like passwords)
* @return array of warnings and execution result
* @since Moodle 3.1
*/
public static function save_attempt($attemptid, $data, $preflightdata = array()) {
global $DB;
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'data' => $data,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::save_attempt_parameters(), $params);
// Add a page, required by validate_attempt.
list($attemptobj, $messages) = self::validate_attempt($params);
$transaction = $DB->start_delegated_transaction();
// Create the $_POST object required by the question engine.
$_POST = array();
foreach ($data as $element) {
$_POST[$element['name']] = $element['value'];
}
$timenow = time();
// Update the timemodifiedoffline field.
$attemptobj->set_offline_modified_time($timenow);
$attemptobj->process_auto_save($timenow);
$transaction->allow_commit();
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the save_attempt return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function save_attempt_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status: true if success'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for process_attempt.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function process_attempt_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'data' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_RAW, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
),
'the data to be saved', VALUE_DEFAULT, array()
),
'finishattempt' => new external_value(PARAM_BOOL, 'whether to finish or not the attempt', VALUE_DEFAULT, false),
'timeup' => new external_value(PARAM_BOOL, 'whether the WS was called by a timer when the time is up',
VALUE_DEFAULT, false),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Process responses during an attempt at a quiz and also deals with attempts finishing.
*
* @param int $attemptid attempt id
* @param array $data the data to be saved
* @param bool $finishattempt whether to finish or not the attempt
* @param bool $timeup whether the WS was called by a timer when the time is up
* @param array $preflightdata preflight required data (like passwords)
* @return array of warnings and the attempt state after the processing
* @since Moodle 3.1
*/
public static function process_attempt($attemptid, $data, $finishattempt = false, $timeup = false, $preflightdata = array()) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'data' => $data,
'finishattempt' => $finishattempt,
'timeup' => $timeup,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::process_attempt_parameters(), $params);
// Do not check access manager rules and evaluate fail if overdue.
$attemptobj = quiz_attempt::create($params['attemptid']);
$failifoverdue = !($attemptobj->get_quizobj()->get_quiz()->overduehandling == 'graceperiod');
list($attemptobj, $messages) = self::validate_attempt($params, false, $failifoverdue);
// Create the $_POST object required by the question engine.
$_POST = array();
foreach ($params['data'] as $element) {
$_POST[$element['name']] = $element['value'];
}
$timenow = time();
$finishattempt = $params['finishattempt'];
$timeup = $params['timeup'];
$result = array();
// Update the timemodifiedoffline field.
$attemptobj->set_offline_modified_time($timenow);
$result['state'] = $attemptobj->process_attempt($timenow, $finishattempt, $timeup, 0);
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the process_attempt return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function process_attempt_returns() {
return new external_single_structure(
array(
'state' => new external_value(PARAM_ALPHANUMEXT, 'state: the new attempt state:
inprogress, finished, overdue, abandoned'),
'warnings' => new external_warnings(),
)
);
}
/**
* Validate an attempt finished for review. The attempt would be reviewed by a user or a teacher.
*
* @param array $params Array of parameters including the attemptid
* @return array containing the attempt object and display options
* @since Moodle 3.1
* @throws moodle_exception
* @throws moodle_quiz_exception
*/
protected static function validate_attempt_review($params) {
$attemptobj = quiz_attempt::create($params['attemptid']);
$attemptobj->check_review_capability();
$displayoptions = $attemptobj->get_display_options(true);
if ($attemptobj->is_own_attempt()) {
if (!$attemptobj->is_finished()) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'attemptclosed');
} else if (!$displayoptions->attempt) {
throw new moodle_exception($attemptobj->cannot_review_message());
}
} else if (!$attemptobj->is_review_allowed()) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'noreviewattempt');
}
return array($attemptobj, $displayoptions);
}
/**
* Describes the parameters for get_attempt_review.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_attempt_review_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'page' => new external_value(PARAM_INT, 'page number, empty for all the questions in all the pages',
VALUE_DEFAULT, -1),
)
);
}
/**
* Returns review information for the given finished attempt, can be used by users or teachers.
*
* @param int $attemptid attempt id
* @param int $page page number, empty for all the questions in all the pages
* @return array of warnings and the attempt data, feedback and questions
* @since Moodle 3.1
* @throws moodle_exception
* @throws moodle_quiz_exception
*/
public static function get_attempt_review($attemptid, $page = -1) {
global $PAGE;
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'page' => $page,
);
$params = self::validate_parameters(self::get_attempt_review_parameters(), $params);
list($attemptobj, $displayoptions) = self::validate_attempt_review($params);
if ($params['page'] !== -1) {
$page = $attemptobj->force_page_number_into_range($params['page']);
} else {
$page = 'all';
}
// Prepare the output.
$result = array();
$result['attempt'] = $attemptobj->get_attempt();
$result['questions'] = self::get_attempt_questions_data($attemptobj, true, $page, true);
$result['additionaldata'] = array();
// Summary data (from behaviours).
$summarydata = $attemptobj->get_additional_summary_data($displayoptions);
foreach ($summarydata as $key => $data) {
// This text does not need formatting (no need for external_format_[string|text]).
$result['additionaldata'][] = array(
'id' => $key,
'title' => $data['title'], $attemptobj->get_quizobj()->get_context()->id,
'content' => $data['content'],
);
}
// Feedback if there is any, and the user is allowed to see it now.
$grade = quiz_rescale_grade($attemptobj->get_attempt()->sumgrades, $attemptobj->get_quiz(), false);
$feedback = $attemptobj->get_overall_feedback($grade);
if ($displayoptions->overallfeedback && $feedback) {
$result['additionaldata'][] = array(
'id' => 'feedback',
'title' => get_string('feedback', 'quiz'),
'content' => $feedback,
);
}
$result['grade'] = $grade;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_attempt_review return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_attempt_review_returns() {
return new external_single_structure(
array(
'grade' => new external_value(PARAM_RAW, 'grade for the quiz (or empty or "notyetgraded")'),
'attempt' => self::attempt_structure(),
'additionaldata' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_ALPHANUMEXT, 'id of the data'),
'title' => new external_value(PARAM_TEXT, 'data title'),
'content' => new external_value(PARAM_RAW, 'data content'),
)
)
),
'questions' => new external_multiple_structure(self::question_structure()),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for view_attempt.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function view_attempt_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'page' => new external_value(PARAM_INT, 'page number'),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Trigger the attempt viewed event.
*
* @param int $attemptid attempt id
* @param int $page page number
* @param array $preflightdata preflight required data (like passwords)
* @return array of warnings and status result
* @since Moodle 3.1
*/
public static function view_attempt($attemptid, $page, $preflightdata = array()) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'page' => $page,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::view_attempt_parameters(), $params);
list($attemptobj, $messages) = self::validate_attempt($params);
// Log action.
$attemptobj->fire_attempt_viewed_event();
// Update attempt page, throwing an exception if $page is not valid.
if (!$attemptobj->set_currentpage($params['page'])) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'Out of sequence access');
}
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the view_attempt return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function view_attempt_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status: true if success'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for view_attempt_summary.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function view_attempt_summary_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
'preflightdata' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'data name'),
'value' => new external_value(PARAM_RAW, 'data value'),
)
), 'Preflight required data (like passwords)', VALUE_DEFAULT, array()
)
)
);
}
/**
* Trigger the attempt summary viewed event.
*
* @param int $attemptid attempt id
* @param array $preflightdata preflight required data (like passwords)
* @return array of warnings and status result
* @since Moodle 3.1
*/
public static function view_attempt_summary($attemptid, $preflightdata = array()) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
'preflightdata' => $preflightdata,
);
$params = self::validate_parameters(self::view_attempt_summary_parameters(), $params);
list($attemptobj, $messages) = self::validate_attempt($params);
// Log action.
$attemptobj->fire_attempt_summary_viewed_event();
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the view_attempt_summary return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function view_attempt_summary_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status: true if success'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for view_attempt_review.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function view_attempt_review_parameters() {
return new external_function_parameters (
array(
'attemptid' => new external_value(PARAM_INT, 'attempt id'),
)
);
}
/**
* Trigger the attempt reviewed event.
*
* @param int $attemptid attempt id
* @return array of warnings and status result
* @since Moodle 3.1
*/
public static function view_attempt_review($attemptid) {
$warnings = array();
$params = array(
'attemptid' => $attemptid,
);
$params = self::validate_parameters(self::view_attempt_review_parameters(), $params);
list($attemptobj, $displayoptions) = self::validate_attempt_review($params);
// Log action.
$attemptobj->fire_attempt_reviewed_event();
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the view_attempt_review return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function view_attempt_review_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status: true if success'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for view_quiz.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_quiz_feedback_for_grade_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'grade' => new external_value(PARAM_FLOAT, 'the grade to check'),
)
);
}
/**
* Get the feedback text that should be show to a student who got the given grade in the given quiz.
*
* @param int $quizid quiz instance id
* @param float $grade the grade to check
* @return array of warnings and status result
* @since Moodle 3.1
* @throws moodle_exception
*/
public static function get_quiz_feedback_for_grade($quizid, $grade) {
global $DB;
$params = array(
'quizid' => $quizid,
'grade' => $grade,
);
$params = self::validate_parameters(self::get_quiz_feedback_for_grade_parameters(), $params);
$warnings = array();
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
$result = array();
$result['feedbacktext'] = '';
$result['feedbacktextformat'] = FORMAT_MOODLE;
$feedback = quiz_feedback_record_for_grade($params['grade'], $quiz);
if (!empty($feedback->feedbacktext)) {
list($text, $format) = external_format_text($feedback->feedbacktext, $feedback->feedbacktextformat, $context->id,
'mod_quiz', 'feedback', $feedback->id);
$result['feedbacktext'] = $text;
$result['feedbacktextformat'] = $format;
$feedbackinlinefiles = external_util::get_area_files($context->id, 'mod_quiz', 'feedback', $feedback->id);
if (!empty($feedbackinlinefiles)) {
$result['feedbackinlinefiles'] = $feedbackinlinefiles;
}
}
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_quiz_feedback_for_grade return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_quiz_feedback_for_grade_returns() {
return new external_single_structure(
array(
'feedbacktext' => new external_value(PARAM_RAW, 'the comment that corresponds to this grade (empty for none)'),
'feedbacktextformat' => new external_format_value('feedbacktext', VALUE_OPTIONAL),
'feedbackinlinefiles' => new external_files('feedback inline files', VALUE_OPTIONAL),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_quiz_access_information.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_quiz_access_information_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id')
)
);
}
/**
* Return access information for a given quiz.
*
* @param int $quizid quiz instance id
* @return array of warnings and the access information
* @since Moodle 3.1
* @throws moodle_quiz_exception
*/
public static function get_quiz_access_information($quizid) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid
);
$params = self::validate_parameters(self::get_quiz_access_information_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
$result = array();
// Capabilities first.
$result['canattempt'] = has_capability('mod/quiz:attempt', $context);;
$result['canmanage'] = has_capability('mod/quiz:manage', $context);;
$result['canpreview'] = has_capability('mod/quiz:preview', $context);;
$result['canreviewmyattempts'] = has_capability('mod/quiz:reviewmyattempts', $context);;
$result['canviewreports'] = has_capability('mod/quiz:viewreports', $context);;
// Access manager now.
$quizobj = quiz::create($cm->instance, $USER->id);
$ignoretimelimits = has_capability('mod/quiz:ignoretimelimits', $context, null, false);
$timenow = time();
$accessmanager = new quiz_access_manager($quizobj, $timenow, $ignoretimelimits);
$result['accessrules'] = $accessmanager->describe_rules();
$result['activerulenames'] = $accessmanager->get_active_rule_names();
$result['preventaccessreasons'] = $accessmanager->prevent_access();
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_quiz_access_information return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_quiz_access_information_returns() {
return new external_single_structure(
array(
'canattempt' => new external_value(PARAM_BOOL, 'Whether the user can do the quiz or not.'),
'canmanage' => new external_value(PARAM_BOOL, 'Whether the user can edit the quiz settings or not.'),
'canpreview' => new external_value(PARAM_BOOL, 'Whether the user can preview the quiz or not.'),
'canreviewmyattempts' => new external_value(PARAM_BOOL, 'Whether the users can review their previous attempts
or not.'),
'canviewreports' => new external_value(PARAM_BOOL, 'Whether the user can view the quiz reports or not.'),
'accessrules' => new external_multiple_structure(
new external_value(PARAM_TEXT, 'rule description'), 'list of rules'),
'activerulenames' => new external_multiple_structure(
new external_value(PARAM_PLUGIN, 'rule plugin names'), 'list of active rules'),
'preventaccessreasons' => new external_multiple_structure(
new external_value(PARAM_TEXT, 'access restriction description'), 'list of reasons'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_attempt_access_information.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_attempt_access_information_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id'),
'attemptid' => new external_value(PARAM_INT, 'attempt id, 0 for the user last attempt if exists', VALUE_DEFAULT, 0),
)
);
}
/**
* Return access information for a given attempt in a quiz.
*
* @param int $quizid quiz instance id
* @param int $attemptid attempt id, 0 for the user last attempt if exists
* @return array of warnings and the access information
* @since Moodle 3.1
* @throws moodle_quiz_exception
*/
public static function get_attempt_access_information($quizid, $attemptid = 0) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid,
'attemptid' => $attemptid,
);
$params = self::validate_parameters(self::get_attempt_access_information_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
$attempttocheck = 0;
if (!empty($params['attemptid'])) {
$attemptobj = quiz_attempt::create($params['attemptid']);
if ($attemptobj->get_userid() != $USER->id) {
throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'notyourattempt');
}
$attempttocheck = $attemptobj->get_attempt();
}
// Access manager now.
$quizobj = quiz::create($cm->instance, $USER->id);
$ignoretimelimits = has_capability('mod/quiz:ignoretimelimits', $context, null, false);
$timenow = time();
$accessmanager = new quiz_access_manager($quizobj, $timenow, $ignoretimelimits);
$attempts = quiz_get_user_attempts($quiz->id, $USER->id, 'finished', true);
$lastfinishedattempt = end($attempts);
if ($unfinishedattempt = quiz_get_user_attempt_unfinished($quiz->id, $USER->id)) {
$attempts[] = $unfinishedattempt;
// Check if the attempt is now overdue. In that case the state will change.
$quizobj->create_attempt_object($unfinishedattempt)->handle_if_time_expired(time(), false);
if ($unfinishedattempt->state != quiz_attempt::IN_PROGRESS and $unfinishedattempt->state != quiz_attempt::OVERDUE) {
$lastfinishedattempt = $unfinishedattempt;
}
}
$numattempts = count($attempts);
if (!$attempttocheck) {
$attempttocheck = $unfinishedattempt ? $unfinishedattempt : $lastfinishedattempt;
}
$result = array();
$result['isfinished'] = $accessmanager->is_finished($numattempts, $lastfinishedattempt);
$result['preventnewattemptreasons'] = $accessmanager->prevent_new_attempt($numattempts, $lastfinishedattempt);
if ($attempttocheck) {
$endtime = $accessmanager->get_end_time($attempttocheck);
$result['endtime'] = ($endtime === false) ? 0 : $endtime;
$attemptid = $unfinishedattempt ? $unfinishedattempt->id : null;
$result['ispreflightcheckrequired'] = $accessmanager->is_preflight_check_required($attemptid);
}
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_attempt_access_information return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_attempt_access_information_returns() {
return new external_single_structure(
array(
'endtime' => new external_value(PARAM_INT, 'When the attempt must be submitted (determined by rules).',
VALUE_OPTIONAL),
'isfinished' => new external_value(PARAM_BOOL, 'Whether there is no way the user will ever be allowed to attempt.'),
'ispreflightcheckrequired' => new external_value(PARAM_BOOL, 'whether a check is required before the user
starts/continues his attempt.', VALUE_OPTIONAL),
'preventnewattemptreasons' => new external_multiple_structure(
new external_value(PARAM_TEXT, 'access restriction description'),
'list of reasons'),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for get_quiz_required_qtypes.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_quiz_required_qtypes_parameters() {
return new external_function_parameters (
array(
'quizid' => new external_value(PARAM_INT, 'quiz instance id')
)
);
}
/**
* Return the potential question types that would be required for a given quiz.
* Please note that for random question types we return the potential question types in the category choosen.
*
* @param int $quizid quiz instance id
* @return array of warnings and the access information
* @since Moodle 3.1
* @throws moodle_quiz_exception
*/
public static function get_quiz_required_qtypes($quizid) {
global $DB, $USER;
$warnings = array();
$params = array(
'quizid' => $quizid
);
$params = self::validate_parameters(self::get_quiz_required_qtypes_parameters(), $params);
list($quiz, $course, $cm, $context) = self::validate_quiz($params['quizid']);
$quizobj = quiz::create($cm->instance, $USER->id);
$quizobj->preload_questions();
$quizobj->load_questions();
// Question types used.
$result = array();
$result['questiontypes'] = $quizobj->get_all_question_types_used(true);
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the get_quiz_required_qtypes return value.
*
* @return external_single_structure
* @since Moodle 3.1
*/
public static function get_quiz_required_qtypes_returns() {
return new external_single_structure(
array(
'questiontypes' => new external_multiple_structure(
new external_value(PARAM_PLUGIN, 'question type'), 'list of question types used in the quiz'),
'warnings' => new external_warnings(),
)
);
}
}