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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/>.
/**
* Choice module external API
*
* @package mod_choice
* @category external
* @copyright 2015 Costantino Cito <ccito@cvaconsulting.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 3.0
*/
defined('MOODLE_INTERNAL') || die;
require_once($CFG->libdir . '/externallib.php');
require_once($CFG->dirroot . '/mod/choice/lib.php');
/**
* Choice module external functions
*
* @package mod_choice
* @category external
* @copyright 2015 Costantino Cito <ccito@cvaconsulting.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 3.0
*/
class mod_choice_external extends external_api {
/**
* Describes the parameters for get_choices_by_courses.
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function get_choice_results_parameters() {
return new external_function_parameters (array('choiceid' => new external_value(PARAM_INT, 'choice instance id')));
}
/**
* Returns user's results for a specific choice
* and a list of those users that did not answered yet.
*
* @param int $choiceid the choice instance id
* @return array of responses details
* @since Moodle 3.0
*/
public static function get_choice_results($choiceid) {
global $USER, $PAGE;
$params = self::validate_parameters(self::get_choice_results_parameters(), array('choiceid' => $choiceid));
if (!$choice = choice_get_choice($params['choiceid'])) {
throw new moodle_exception("invalidcoursemodule", "error");
}
list($course, $cm) = get_course_and_cm_from_instance($choice, 'choice');
$context = context_module::instance($cm->id);
self::validate_context($context);
$groupmode = groups_get_activity_groupmode($cm);
// Check if we have to include responses from inactive users.
$onlyactive = $choice->includeinactive ? false : true;
$users = choice_get_response_data($choice, $cm, $groupmode, $onlyactive);
// Show those who haven't answered the question.
if (!empty($choice->showunanswered)) {
$choice->option[0] = get_string('notanswered', 'choice');
$choice->maxanswers[0] = 0;
}
$results = prepare_choice_show_results($choice, $course, $cm, $users);
$options = array();
$fullnamecap = has_capability('moodle/site:viewfullnames', $context);
foreach ($results->options as $optionid => $option) {
$userresponses = array();
$numberofuser = 0;
$percentageamount = 0;
if (property_exists($option, 'user') and
(has_capability('mod/choice:readresponses', $context) or choice_can_view_results($choice))) {
$numberofuser = count($option->user);
$percentageamount = ((float)$numberofuser / (float)$results->numberofuser) * 100.0;
if ($choice->publish) {
foreach ($option->user as $userresponse) {
$response = array();
$response['userid'] = $userresponse->id;
$response['fullname'] = fullname($userresponse, $fullnamecap);
$userpicture = new user_picture($userresponse);
$userpicture->size = 1; // Size f1.
$response['profileimageurl'] = $userpicture->get_url($PAGE)->out(false);
// Add optional properties.
foreach (array('answerid', 'timemodified') as $field) {
if (property_exists($userresponse, 'answerid')) {
$response[$field] = $userresponse->$field;
}
}
$userresponses[] = $response;
}
}
}
$options[] = array('id' => $optionid,
'text' => external_format_string($option->text, $context->id),
'maxanswer' => $option->maxanswer,
'userresponses' => $userresponses,
'numberofuser' => $numberofuser,
'percentageamount' => $percentageamount
);
}
$warnings = array();
return array(
'options' => $options,
'warnings' => $warnings
);
}
/**
* Describes the get_choice_results return value.
*
* @return external_single_structure
* @since Moodle 3.0
*/
public static function get_choice_results_returns() {
return new external_single_structure(
array(
'options' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'choice instance id'),
'text' => new external_value(PARAM_RAW, 'text of the choice'),
'maxanswer' => new external_value(PARAM_INT, 'maximum number of answers'),
'userresponses' => new external_multiple_structure(
new external_single_structure(
array(
'userid' => new external_value(PARAM_INT, 'user id'),
'fullname' => new external_value(PARAM_NOTAGS, 'user full name'),
'profileimageurl' => new external_value(PARAM_URL, 'profile user image url'),
'answerid' => new external_value(PARAM_INT, 'answer id', VALUE_OPTIONAL),
'timemodified' => new external_value(PARAM_INT, 'time of modification', VALUE_OPTIONAL),
), 'User responses'
)
),
'numberofuser' => new external_value(PARAM_INT, 'number of users answers'),
'percentageamount' => new external_value(PARAM_FLOAT, 'percentage of users answers')
), 'Options'
)
),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for mod_choice_get_choice_options.
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function get_choice_options_parameters() {
return new external_function_parameters (array('choiceid' => new external_value(PARAM_INT, 'choice instance id')));
}
/**
* Returns options for a specific choice
*
* @param int $choiceid the choice instance id
* @return array of options details
* @since Moodle 3.0
*/
public static function get_choice_options($choiceid) {
global $USER;
$warnings = array();
$params = self::validate_parameters(self::get_choice_options_parameters(), array('choiceid' => $choiceid));
if (!$choice = choice_get_choice($params['choiceid'])) {
throw new moodle_exception("invalidcoursemodule", "error");
}
list($course, $cm) = get_course_and_cm_from_instance($choice, 'choice');
$context = context_module::instance($cm->id);
self::validate_context($context);
require_capability('mod/choice:choose', $context);
$groupmode = groups_get_activity_groupmode($cm);
$onlyactive = $choice->includeinactive ? false : true;
$allresponses = choice_get_response_data($choice, $cm, $groupmode, $onlyactive);
$timenow = time();
$choiceopen = true;
$showpreview = false;
if (!empty($choice->timeopen) && ($choice->timeopen > $timenow)) {
$choiceopen = false;
$warnings[1] = get_string("notopenyet", "choice", userdate($choice->timeopen));
if ($choice->showpreview) {
$warnings[2] = get_string('previewonly', 'choice', userdate($choice->timeopen));
$showpreview = true;
}
}
if (!empty($choice->timeclose) && ($timenow > $choice->timeclose)) {
$choiceopen = false;
$warnings[3] = get_string("expired", "choice", userdate($choice->timeclose));
}
$optionsarray = array();
if ($choiceopen or $showpreview) {
$options = choice_prepare_options($choice, $USER, $cm, $allresponses);
foreach ($options['options'] as $option) {
$optionarr = array();
$optionarr['id'] = $option->attributes->value;
$optionarr['text'] = external_format_string($option->text, $context->id);
$optionarr['maxanswers'] = $option->maxanswers;
$optionarr['displaylayout'] = $option->displaylayout;
$optionarr['countanswers'] = $option->countanswers;
foreach (array('checked', 'disabled') as $field) {
if (property_exists($option->attributes, $field) and $option->attributes->$field == 1) {
$optionarr[$field] = 1;
} else {
$optionarr[$field] = 0;
}
}
// When showpreview is active, we show options as disabled.
if ($showpreview or ($optionarr['checked'] == 1 and !$choice->allowupdate)) {
$optionarr['disabled'] = 1;
}
$optionsarray[] = $optionarr;
}
}
foreach ($warnings as $key => $message) {
$warnings[$key] = array(
'item' => 'choice',
'itemid' => $cm->id,
'warningcode' => $key,
'message' => $message
);
}
return array(
'options' => $optionsarray,
'warnings' => $warnings
);
}
/**
* Describes the get_choice_results return value.
*
* @return external_multiple_structure
* @since Moodle 3.0
*/
public static function get_choice_options_returns() {
return new external_single_structure(
array(
'options' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'option id'),
'text' => new external_value(PARAM_RAW, 'text of the choice'),
'maxanswers' => new external_value(PARAM_INT, 'maximum number of answers'),
'displaylayout' => new external_value(PARAM_BOOL, 'true for orizontal, otherwise vertical'),
'countanswers' => new external_value(PARAM_INT, 'number of answers'),
'checked' => new external_value(PARAM_BOOL, 'we already answered'),
'disabled' => new external_value(PARAM_BOOL, 'option disabled'),
)
), 'Options'
),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for submit_choice_response.
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function submit_choice_response_parameters() {
return new external_function_parameters (
array(
'choiceid' => new external_value(PARAM_INT, 'choice instance id'),
'responses' => new external_multiple_structure(
new external_value(PARAM_INT, 'answer id'),
'Array of response ids'
),
)
);
}
/**
* Submit choice responses
*
* @param int $choiceid the choice instance id
* @param array $responses the response ids
* @return array answers information and warnings
* @since Moodle 3.0
*/
public static function submit_choice_response($choiceid, $responses) {
global $USER;
$warnings = array();
$params = self::validate_parameters(self::submit_choice_response_parameters(),
array(
'choiceid' => $choiceid,
'responses' => $responses
));
if (!$choice = choice_get_choice($params['choiceid'])) {
throw new moodle_exception("invalidcoursemodule", "error");
}
list($course, $cm) = get_course_and_cm_from_instance($choice, 'choice');
$context = context_module::instance($cm->id);
self::validate_context($context);
require_capability('mod/choice:choose', $context);
$timenow = time();
if (!empty($choice->timeopen) && ($choice->timeopen > $timenow)) {
throw new moodle_exception("notopenyet", "choice", '', userdate($choice->timeopen));
} else if (!empty($choice->timeclose) && ($timenow > $choice->timeclose)) {
throw new moodle_exception("expired", "choice", '', userdate($choice->timeclose));
}
if (!choice_get_my_response($choice) or $choice->allowupdate) {
// When a single response is given, we convert the array to a simple variable
// in order to avoid choice_user_submit_response to check with allowmultiple even
// for a single response.
if (count($params['responses']) == 1) {
$params['responses'] = reset($params['responses']);
}
choice_user_submit_response($params['responses'], $choice, $USER->id, $course, $cm);
} else {
throw new moodle_exception('missingrequiredcapability', 'webservice', '', 'allowupdate');
}
$answers = choice_get_my_response($choice);
return array(
'answers' => $answers,
'warnings' => $warnings
);
}
/**
* Describes the submit_choice_response return value.
*
* @return external_multiple_structure
* @since Moodle 3.0
*/
public static function submit_choice_response_returns() {
return new external_single_structure(
array(
'answers' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'answer id'),
'choiceid' => new external_value(PARAM_INT, 'choiceid'),
'userid' => new external_value(PARAM_INT, 'user id'),
'optionid' => new external_value(PARAM_INT, 'optionid'),
'timemodified' => new external_value(PARAM_INT, 'time of last modification')
), 'Answers'
)
),
'warnings' => new external_warnings(),
)
);
}
/**
* Returns description of method parameters
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function view_choice_parameters() {
return new external_function_parameters(
array(
'choiceid' => new external_value(PARAM_INT, 'choice instance id')
)
);
}
/**
* Trigger the course module viewed event and update the module completion status.
*
* @param int $choiceid the choice instance id
* @return array of warnings and status result
* @since Moodle 3.0
* @throws moodle_exception
*/
public static function view_choice($choiceid) {
global $CFG;
$params = self::validate_parameters(self::view_choice_parameters(),
array(
'choiceid' => $choiceid
));
$warnings = array();
// Request and permission validation.
if (!$choice = choice_get_choice($params['choiceid'])) {
throw new moodle_exception("invalidcoursemodule", "error");
}
list($course, $cm) = get_course_and_cm_from_instance($choice, 'choice');
$context = context_module::instance($cm->id);
self::validate_context($context);
// Trigger course_module_viewed event and completion.
choice_view($choice, $course, $cm, $context);
$result = array();
$result['status'] = true;
$result['warnings'] = $warnings;
return $result;
}
/**
* Returns description of method result value
*
* @return external_description
* @since Moodle 3.0
*/
public static function view_choice_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_choices_by_courses.
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function get_choices_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 choices in a provided list of courses,
* if no list is provided all choices that the user can view will be returned.
*
* @param array $courseids the course ids
* @return array of choices details
* @since Moodle 3.0
*/
public static function get_choices_by_courses($courseids = array()) {
global $CFG;
$returnedchoices = array();
$warnings = array();
$params = self::validate_parameters(self::get_choices_by_courses_parameters(), array('courseids' => $courseids));
$courses = array();
if (empty($params['courseids'])) {
$courses = enrol_get_my_courses();
$params['courseids'] = array_keys($courses);
}
// Ensure there are courseids to loop through.
if (!empty($params['courseids'])) {
list($courses, $warnings) = external_util::validate_courses($params['courseids'], $courses);
// Get the choices in this course, this function checks users visibility permissions.
// We can avoid then additional validate_context calls.
$choices = get_all_instances_in_courses("choice", $courses);
foreach ($choices as $choice) {
$context = context_module::instance($choice->coursemodule);
// Entry to return.
$choicedetails = array();
// First, we return information that any user can see in the web interface.
$choicedetails['id'] = $choice->id;
$choicedetails['coursemodule'] = $choice->coursemodule;
$choicedetails['course'] = $choice->course;
$choicedetails['name'] = external_format_string($choice->name, $context->id);
// Format intro.
$options = array('noclean' => true);
list($choicedetails['intro'], $choicedetails['introformat']) =
external_format_text($choice->intro, $choice->introformat, $context->id, 'mod_choice', 'intro', null, $options);
$choicedetails['introfiles'] = external_util::get_area_files($context->id, 'mod_choice', 'intro', false, false);
if (has_capability('mod/choice:choose', $context)) {
$choicedetails['publish'] = $choice->publish;
$choicedetails['showresults'] = $choice->showresults;
$choicedetails['showpreview'] = $choice->showpreview;
$choicedetails['timeopen'] = $choice->timeopen;
$choicedetails['timeclose'] = $choice->timeclose;
$choicedetails['display'] = $choice->display;
$choicedetails['allowupdate'] = $choice->allowupdate;
$choicedetails['allowmultiple'] = $choice->allowmultiple;
$choicedetails['limitanswers'] = $choice->limitanswers;
$choicedetails['showunanswered'] = $choice->showunanswered;
$choicedetails['includeinactive'] = $choice->includeinactive;
}
if (has_capability('moodle/course:manageactivities', $context)) {
$choicedetails['timemodified'] = $choice->timemodified;
$choicedetails['completionsubmit'] = $choice->completionsubmit;
$choicedetails['section'] = $choice->section;
$choicedetails['visible'] = $choice->visible;
$choicedetails['groupmode'] = $choice->groupmode;
$choicedetails['groupingid'] = $choice->groupingid;
}
$returnedchoices[] = $choicedetails;
}
}
$result = array();
$result['choices'] = $returnedchoices;
$result['warnings'] = $warnings;
return $result;
}
/**
* Describes the mod_choice_get_choices_by_courses return value.
*
* @return external_single_structure
* @since Moodle 3.0
*/
public static function get_choices_by_courses_returns() {
return new external_single_structure(
array(
'choices' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'Choice instance id'),
'coursemodule' => new external_value(PARAM_INT, 'Course module id'),
'course' => new external_value(PARAM_INT, 'Course id'),
'name' => new external_value(PARAM_RAW, 'Choice name'),
'intro' => new external_value(PARAM_RAW, 'The choice intro'),
'introformat' => new external_format_value('intro'),
'introfiles' => new external_files('Files in the introduction text', VALUE_OPTIONAL),
'publish' => new external_value(PARAM_BOOL, 'If choice is published', VALUE_OPTIONAL),
'showresults' => new external_value(PARAM_INT, '0 never, 1 after answer, 2 after close, 3 always',
VALUE_OPTIONAL),
'display' => new external_value(PARAM_INT, 'Display mode (vertical, horizontal)', VALUE_OPTIONAL),
'allowupdate' => new external_value(PARAM_BOOL, 'Allow update', VALUE_OPTIONAL),
'allowmultiple' => new external_value(PARAM_BOOL, 'Allow multiple choices', VALUE_OPTIONAL),
'showunanswered' => new external_value(PARAM_BOOL, 'Show users who not answered yet', VALUE_OPTIONAL),
'includeinactive' => new external_value(PARAM_BOOL, 'Include inactive users', VALUE_OPTIONAL),
'limitanswers' => new external_value(PARAM_BOOL, 'Limit unswers', VALUE_OPTIONAL),
'timeopen' => new external_value(PARAM_INT, 'Date of opening validity', VALUE_OPTIONAL),
'timeclose' => new external_value(PARAM_INT, 'Date of closing validity', VALUE_OPTIONAL),
'showpreview' => new external_value(PARAM_BOOL, 'Show preview before timeopen', VALUE_OPTIONAL),
'timemodified' => new external_value(PARAM_INT, 'Time of last modification', VALUE_OPTIONAL),
'completionsubmit' => new external_value(PARAM_BOOL, 'Completion on user submission', VALUE_OPTIONAL),
'section' => new external_value(PARAM_INT, 'Course section id', VALUE_OPTIONAL),
'visible' => new external_value(PARAM_BOOL, 'Visible', VALUE_OPTIONAL),
'groupmode' => new external_value(PARAM_INT, 'Group mode', VALUE_OPTIONAL),
'groupingid' => new external_value(PARAM_INT, 'Group id', VALUE_OPTIONAL),
), 'Choices'
)
),
'warnings' => new external_warnings(),
)
);
}
/**
* Describes the parameters for delete_choice_responses.
*
* @return external_function_parameters
* @since Moodle 3.0
*/
public static function delete_choice_responses_parameters() {
return new external_function_parameters (
array(
'choiceid' => new external_value(PARAM_INT, 'choice instance id'),
'responses' => new external_multiple_structure(
new external_value(PARAM_INT, 'response id'),
'Array of response ids, empty for deleting all the current user responses.',
VALUE_DEFAULT,
array()
),
)
);
}
/**
* Delete the given submitted responses in a choice
*
* @param int $choiceid the choice instance id
* @param array $responses the response ids, empty for deleting all the current user responses
* @return array status information and warnings
* @throws moodle_exception
* @since Moodle 3.0
*/
public static function delete_choice_responses($choiceid, $responses = array()) {
$status = false;
$warnings = array();
$params = self::validate_parameters(self::delete_choice_responses_parameters(),
array(
'choiceid' => $choiceid,
'responses' => $responses
));
if (!$choice = choice_get_choice($params['choiceid'])) {
throw new moodle_exception("invalidcoursemodule", "error");
}
list($course, $cm) = get_course_and_cm_from_instance($choice, 'choice');
$context = context_module::instance($cm->id);
self::validate_context($context);
require_capability('mod/choice:choose', $context);
$candeleteall = has_capability('mod/choice:deleteresponses', $context);
if ($candeleteall || $choice->allowupdate) {
// Check if we can delete our own responses.
if (!$candeleteall) {
$timenow = time();
if (!empty($choice->timeclose) && ($timenow > $choice->timeclose)) {
throw new moodle_exception("expired", "choice", '', userdate($choice->timeclose));
}
}
if (empty($params['responses'])) {
// No responses indicated so delete only my responses.
$todelete = array_keys(choice_get_my_response($choice));
} else {
// Fill an array with the responses that can be deleted for this choice.
if ($candeleteall) {
// Teacher/managers can delete any.
$allowedresponses = array_keys(choice_get_all_responses($choice));
} else {
// Students can delete only their own responses.
$allowedresponses = array_keys(choice_get_my_response($choice));
}
$todelete = array();
foreach ($params['responses'] as $response) {
if (!in_array($response, $allowedresponses)) {
$warnings[] = array(
'item' => 'response',
'itemid' => $response,
'warningcode' => 'nopermissions',
'message' => 'Invalid response id, the response does not exist or you are not allowed to delete it.'
);
} else {
$todelete[] = $response;
}
}
}
$status = choice_delete_responses($todelete, $choice, $cm, $course);
} else {
// The user requires the capability to delete responses.
throw new required_capability_exception($context, 'mod/choice:deleteresponses', 'nopermissions', '');
}
return array(
'status' => $status,
'warnings' => $warnings
);
}
/**
* Describes the delete_choice_responses return value.
*
* @return external_multiple_structure
* @since Moodle 3.0
*/
public static function delete_choice_responses_returns() {
return new external_single_structure(
array(
'status' => new external_value(PARAM_BOOL, 'status, true if everything went right'),
'warnings' => new external_warnings(),
)
);
}
}