/
externallib.php
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/
externallib.php
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<?php
// 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/>.
/**
* External Web Service Template
*
* @package localwstemplate
* @copyright 2011 Moodle Pty Ltd (http://moodle.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once($CFG->libdir . "/externallib.php");
class local_moodeka_external extends external_api {
/**
* Returns description of method parameters
* @return external_function_parameters
*/
public static function get_quiz_parameters() {
return new external_function_parameters(
array()
);
}
/**
* Returns welcome message
* @return string welcome message
*/
public static function get_quiz() {
global $USER, $DB, $CFG;
$randomcolors = array('green', 'yellow', 'blue', 'red', 'purple');
$randomicons = array('entertainment', 'sports', 'music', 'tvmovies', 'science', 'geography', 'history', 'knowledge', 'food');
$randomsingletypes = array('single-select-item', 'single-select');
//Parameter validation
$params = self::validate_parameters(self::get_quiz_parameters(), array());
//Context validation
//self::validate_context(context_user::get_instance($USER->id));
//Capability checking
//if (!has_capability('moodle/user:viewdetails', $context)) {
// throw new moodle_exception('cannotviewprofile');
//}
$courses = enrol_get_users_courses($USER->id, true, 'id, shortname, fullname, idnumber, visible');
$result = array();
foreach ($courses as $course) {
// Find all questions the user is allowed to see
$coursecontext = context_course::instance($course->id);
$questions = array();
require_once($CFG->dirroot . "/question/editlib.php");
$category = question_get_default_category($coursecontext->id);
$catquestions = get_questions_category($category);
// only keep multichoice yet.
foreach ($catquestions as $question) {
if ($question->qtype == "multichoice") {
$questions[$question->id] = $question;
}
}
if (!empty($questions)) {
// pick random theme color and icon.
$color = $randomcolors[array_rand($randomcolors)];
$icon = $randomicons[array_rand($randomicons)];
$quizresult = new stdClass();
$quizresult->name = $course->shortname;
$quizresult->id = $icon;
$quizresult->theme = $color;
$quizresult->quizzes = array();
// Only get 8 questions maxim
$i = 0;
foreach($questions as $question) {
if ($i<8) {
$i++;
// Convert them into JSON expected code
$questionresult = new stdClass();
$questionresult->question = clean_param($question->questiontext, PARAM_TEXT);
$questionresult->options = array();
$answernum = 0;
$jsonanswer = array();
foreach ($question->options->answers as $answer) {
// Find out if the answer is the correct one (obviouly we don't support multiple answer yet)
if (($answer->fraction) > 0) {
$jsonanswer[] = $answernum;
}
$questionresult->options[] = clean_param($answer->answer, PARAM_TEXT);
$answernum++;
}
// Detect moodeka quiz type.
if (count($jsonanswer) > 1) {
$type = 'multi-select';
} else {
if ($answernum == 4 and rand(0,1)) {
$type = 'four-quarter';
} else {
$type = $randomsingletypes[array_rand($randomsingletypes)];
}
}
$questionresult->answer = $jsonanswer;
$questionresult->type = $type;
$quizresult->quizzes[] = $questionresult;
}
}
$result[] = $quizresult;
}
}
return $result;
}
/**
* Returns description of method result value
* @return external_description
*/
public static function get_quiz_returns() {
return new external_multiple_structure(
new external_single_structure( array (
'name' => new external_value(PARAM_TEXT, 'Quiz name on the moodeka main page'),
'id' => new external_value(PARAM_TEXT, 'Quiz shortname - likely to be a moodeka icon'),
'theme' => new external_value(PARAM_TEXT, 'color of the quiz'),
'quizzes' => new external_multiple_structure(
new external_single_structure( array (
'type' => new external_value(PARAM_TEXT, 'question type'),
'question' => new external_value(PARAM_TEXT, 'question'),
'options' => new external_multiple_structure(new external_value(PARAM_TEXT, 'question choice')),
'answer' => new external_multiple_structure(new external_value(PARAM_TEXT, 'possible answer')),
)))
))
);
}
}