<?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/>.

/**
 * List of deprecated mod_quiz functions.
 *
 * @package   mod_quiz
 * @copyright 2021 Shamim Rezaie <shamim@moodle.com>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */


> use mod_quiz\access_manager;
/**
> use mod_quiz\quiz_settings;
 * Internal function used in quiz_get_completion_state. Check passing grade (or no attempts left) requirement for completion.
> use mod_quiz\task\update_overdue_attempts;
 *
> 


 * @deprecated since Moodle 3.11
 * @todo MDL-71196 Final deprecation in Moodle 4.3
 * @see \mod_quiz\completion\custom_completion
 * @param stdClass $course
 * @param cm_info|stdClass $cm
 * @param int $userid
 * @param stdClass $quiz
 * @return bool True if the passing grade (or no attempts left) requirement is disabled or met.
 * @throws coding_exception
 */
function quiz_completion_check_passing_grade_or_all_attempts($course, $cm, $userid, $quiz) {
    global $CFG;

    debugging('quiz_completion_check_passing_grade_or_all_attempts has been deprecated.', DEBUG_DEVELOPER);

    if (!$cm->completionpassgrade) {
        return true;
    }

    // Check for passing grade.
    require_once($CFG->libdir . '/gradelib.php');

<     $item = grade_item::fetch(array('courseid' => $course->id, 'itemtype' => 'mod',
<             'itemmodule' => 'quiz', 'iteminstance' => $cm->instance, 'outcomeid' => null));



>     $item = grade_item::fetch(['courseid' => $course->id, 'itemtype' => 'mod',
>             'itemmodule' => 'quiz', 'iteminstance' => $cm->instance, 'outcomeid' => null]);


    if ($item) {

<         $grades = grade_grade::fetch_users_grades($item, array($userid), false);



>         $grades = grade_grade::fetch_users_grades($item, [$userid], false);


        if (!empty($grades[$userid]) && $grades[$userid]->is_passed($item)) {
            return true;
        }
    }

    // If a passing grade is required and exhausting all available attempts is not accepted for completion,
    // then this quiz is not complete.
    if (!$quiz->completionattemptsexhausted) {
        return false;
    }

    // Check if all attempts are used up.
    $attempts = quiz_get_user_attempts($quiz->id, $userid, 'finished', true);
    if (!$attempts) {
        return false;
    }
    $lastfinishedattempt = end($attempts);
    $context = context_module::instance($cm->id);

<     $quizobj = quiz::create($quiz->id, $userid);
<     $accessmanager = new quiz_access_manager($quizobj, time(),



>     $quizobj = quiz_settings::create($quiz->id, $userid);
>     $accessmanager = new access_manager($quizobj, time(),


            has_capability('mod/quiz:ignoretimelimits', $context, $userid, false));

    return $accessmanager->is_finished(count($attempts), $lastfinishedattempt);
}

/**
 * Internal function used in quiz_get_completion_state. Check minimum attempts requirement for completion.
 *
 * @deprecated since Moodle 3.11
 * @todo MDL-71196 Final deprecation in Moodle 4.3
 * @see \mod_quiz\completion\custom_completion
 * @param int $userid
 * @param stdClass $quiz
 * @return bool True if minimum attempts requirement is disabled or met.
 */
function quiz_completion_check_min_attempts($userid, $quiz) {

    debugging('quiz_completion_check_min_attempts has been deprecated.', DEBUG_DEVELOPER);

    if (empty($quiz->completionminattempts)) {
        return true;
    }

    // Check if the user has done enough attempts.
    $attempts = quiz_get_user_attempts($quiz->id, $userid, 'finished', true);
    return $quiz->completionminattempts <= count($attempts);
}

/**
 * Obtains the automatic completion state for this quiz on any conditions
 * in quiz settings, such as if all attempts are used or a certain grade is achieved.
 *
 * @deprecated since Moodle 3.11
 * @todo MDL-71196 Final deprecation in Moodle 4.3
 * @see \mod_quiz\completion\custom_completion
 * @param stdClass $course Course
 * @param cm_info|stdClass $cm Course-module
 * @param int $userid User ID
 * @param bool $type Type of comparison (or/and; can be used as return value if no conditions)
 * @return bool True if completed, false if not. (If no conditions, then return
 *   value depends on comparison type)
 */
function quiz_get_completion_state($course, $cm, $userid, $type) {
    global $DB;

    // No need to call debugging here. Deprecation debugging notice already being called in \completion_info::internal_get_state().


<     $quiz = $DB->get_record('quiz', array('id' => $cm->instance), '*', MUST_EXIST);



>     $quiz = $DB->get_record('quiz', ['id' => $cm->instance], '*', MUST_EXIST);


    if (!$quiz->completionattemptsexhausted && !$cm->completionpassgrade && !$quiz->completionminattempts) {
        return $type;
    }

    if (!quiz_completion_check_passing_grade_or_all_attempts($course, $cm, $userid, $quiz)) {
        return false;
    }

    if (!quiz_completion_check_min_attempts($userid, $quiz)) {
        return false;
    }

    return true;

> }
}
> 
> /**
>  * Retrieves tag information for the given list of quiz slot ids.
>  * Currently the only slots that have tags are random question slots.
>  *
>  * Example:
>  * If we have 3 slots with id 1, 2, and 3. The first slot has two tags, the second
>  * has one tag, and the third has zero tags. The return structure will look like:
>  * [
>  *      1 => [
>  *          quiz_slot_tags.id => { ...tag data... },
>  *          quiz_slot_tags.id => { ...tag data... },
>  *      ],
>  *      2 => [
>  *          quiz_slot_tags.id => { ...tag data... },
>  *      ],
>  *      3 => [],
>  * ]
>  *
>  * @param int[] $slotids The list of id for the quiz slots.
>  * @return array[] List of quiz_slot_tags records indexed by slot id.
>  * @deprecated since Moodle 4.0
>  * @todo Final deprecation on Moodle 4.4 MDL-72438
>  */
> function quiz_retrieve_tags_for_slot_ids($slotids) {
>     debugging('Method quiz_retrieve_tags_for_slot_ids() is deprecated, ' .
>         'see filtercondition->tags from the question_set_reference table.', DEBUG_DEVELOPER);
>     global $DB;
>     if (empty($slotids)) {
>         return [];
>     }
> 
>     $slottags = $DB->get_records_list('quiz_slot_tags', 'slotid', $slotids);
>     $tagsbyid = core_tag_tag::get_bulk(array_filter(array_column($slottags, 'tagid')), 'id, name');
>     $tagsbyname = false; // It will be loaded later if required.
>     $emptytagids = array_reduce($slotids, function($carry, $slotid) {
>         $carry[$slotid] = [];
>         return $carry;
>     }, []);
> 
>     return array_reduce(
>         $slottags,
>         function($carry, $slottag) use ($slottags, $tagsbyid, $tagsbyname) {
>             if (isset($tagsbyid[$slottag->tagid])) {
>                 // Make sure that we're returning the most updated tag name.
>                 $slottag->tagname = $tagsbyid[$slottag->tagid]->name;
>             } else {
>                 if ($tagsbyname === false) {
>                     // We were hoping that this query could be avoided, but life
>                     // showed its other side to us!
>                     $tagcollid = core_tag_area::get_collection('core', 'question');
>                     $tagsbyname = core_tag_tag::get_by_name_bulk(
>                         $tagcollid,
>                         array_column($slottags, 'tagname'),
>                         'id, name'
>                     );
>                 }
>                 if (isset($tagsbyname[$slottag->tagname])) {
>                     // Make sure that we're returning the current tag id that matches
>                     // the given tag name.
>                     $slottag->tagid = $tagsbyname[$slottag->tagname]->id;
>                 } else {
>                     // The tag does not exist anymore (neither the tag id nor the tag name
>                     // matches an existing tag).
>                     // We still need to include this row in the result as some callers might
>                     // be interested in these rows. An example is the editing forms that still
>                     // need to display tag names even if they don't exist anymore.
>                     $slottag->tagid = null;
>                 }
>             }
> 
>             $carry[$slottag->slotid][$slottag->id] = $slottag;
>             return $carry;
>         },
>         $emptytagids
>     );
> }
> 
> /**
>  * Verify that the question exists, and the user has permission to use it.
>  *
>  * @deprecated in 4.1 use mod_quiz\structure::has_use_capability(...) instead.
>  *
>  * @param stdClass $quiz the quiz settings.
>  * @param int $slot which question in the quiz to test.
>  * @return bool whether the user can use this question.
>  */
> function quiz_has_question_use($quiz, $slot) {
>     global $DB;
> 
>     debugging('Deprecated. Please use mod_quiz\structure::has_use_capability instead.');
> 
>     $sql = 'SELECT q.*
>               FROM {quiz_slots} slot
>               JOIN {question_references} qre ON qre.itemid = slot.id
>               JOIN {question_bank_entries} qbe ON qbe.id = qre.questionbankentryid
>               JOIN {question_versions} qve ON qve.questionbankentryid = qbe.id
>               JOIN {question} q ON q.id = qve.questionid
>              WHERE slot.quizid = ?
>                AND slot.slot = ?
>                AND qre.component = ?
>                AND qre.questionarea = ?';
> 
>     $question = $DB->get_record_sql($sql, [$quiz->id, $slot, 'mod_quiz', 'slot']);
> 
>     if (!$question) {
>         return false;
>     }
>     return question_has_capability_on($question, 'use');
> }
> 
> /**
>  * @copyright 2012 the Open University
>  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
>  * @deprecated since Moodle 4.2. Code moved to mod_quiz\task\update_overdue_attempts.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> class mod_quiz_overdue_attempt_updater {
> 
>     /**
>      * @deprecated since Moodle 4.2. Code moved to mod_quiz\task\update_overdue_attempts. that was.
>      */
>     public function update_overdue_attempts($timenow, $processto) {
>         debugging('mod_quiz_overdue_attempt_updater has been deprecated. The code wsa moved to ' .
>                 'mod_quiz\task\update_overdue_attempts.');
>         return (new update_overdue_attempts())->update_all_overdue_attempts((int) $timenow, (int) $processto);
>     }
> 
>     /**
>      * @deprecated since Moodle 4.2. Code moved to mod_quiz\task\update_overdue_attempts.
>      */
>     public function get_list_of_overdue_attempts($processto) {
>         debugging('mod_quiz_overdue_attempt_updater has been deprecated. The code wsa moved to ' .
>                 'mod_quiz\task\update_overdue_attempts.');
>         return (new update_overdue_attempts())->get_list_of_overdue_attempts((int) $processto);
>     }
> }
> 
> /**
>  * Class for quiz exceptions. Just saves a couple of arguments on the
>  * constructor for a moodle_exception.
>  *
>  * @copyright 2008 Tim Hunt
>  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
>  * @since     Moodle 2.0
>  * @deprecated since Moodle 4.2. Please just use moodle_exception.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> class moodle_quiz_exception extends moodle_exception {
>     /**
>      * Constructor.
>      *
>      * @param quiz_settings $quizobj the quiz the error relates to.
>      * @param string $errorcode The name of the string from error.php to print.
>      * @param mixed $a Extra words and phrases that might be required in the error string.
>      * @param string $link The url where the user will be prompted to continue.
>      *      If no url is provided the user will be directed to the site index page.
>      * @param string|null $debuginfo optional debugging information.
>      * @deprecated since Moodle 4.2. Please just use moodle_exception.
>      */
>     public function __construct($quizobj, $errorcode, $a = null, $link = '', $debuginfo = null) {
>         debugging('Class moodle_quiz_exception is deprecated. ' .
>                 'Please use a standard moodle_exception instead.', DEBUG_DEVELOPER);
>         if (!$link) {
>             $link = $quizobj->view_url();
>         }
>         parent::__construct($errorcode, 'quiz', $link, $a, $debuginfo);
>     }
> }
> 
> /**
>  * Update the sumgrades field of the quiz. This needs to be called whenever
>  * the grading structure of the quiz is changed. For example if a question is
>  * added or removed, or a question weight is changed.
>  *
>  * You should call {@see quiz_delete_previews()} before you call this function.
>  *
>  * @param stdClass $quiz a quiz.
>  * @deprecated since Moodle 4.2. Please use grade_calculator::recompute_quiz_sumgrades.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_update_sumgrades($quiz) {
>     debugging('quiz_update_sumgrades is deprecated. ' .
>         'Please use a standard grade_calculator::recompute_quiz_sumgrades instead.', DEBUG_DEVELOPER);
>     quiz_settings::create($quiz->id)->get_grade_calculator()->recompute_quiz_sumgrades();
> }
> 
> /**
>  * Update the sumgrades field of the attempts at a quiz.
>  *
>  * @param stdClass $quiz a quiz.
>  * @deprecated since Moodle 4.2. Please use grade_calculator::recompute_all_attempt_sumgrades.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_update_all_attempt_sumgrades($quiz) {
>     debugging('quiz_update_all_attempt_sumgrades is deprecated. ' .
>         'Please use a standard grade_calculator::recompute_all_attempt_sumgrades instead.', DEBUG_DEVELOPER);
>     quiz_settings::create($quiz->id)->get_grade_calculator()->recompute_all_attempt_sumgrades();
> }
> 
> /**
>  * Update the final grade at this quiz for all students.
>  *
>  * This function is equivalent to calling quiz_save_best_grade for all
>  * users, but much more efficient.
>  *
>  * @param stdClass $quiz the quiz settings.
>  * @deprecated since Moodle 4.2. Please use grade_calculator::recompute_all_final_grades.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_update_all_final_grades($quiz) {
>     debugging('quiz_update_all_final_grades is deprecated. ' .
>         'Please use a standard grade_calculator::recompute_all_final_grades instead.', DEBUG_DEVELOPER);
>     quiz_settings::create($quiz->id)->get_grade_calculator()->recompute_all_final_grades();
> }
> 
> /**
>  * The quiz grade is the maximum that student's results are marked out of. When it
>  * changes, the corresponding data in quiz_grades and quiz_feedback needs to be
>  * rescaled. After calling this function, you probably need to call
>  * quiz_update_all_attempt_sumgrades, grade_calculator::recompute_all_final_grades();
>  * quiz_update_grades. (At least, that is what this comment has said for years, but
>  * it seems to call recompute_all_final_grades itself.)
>  *
>  * @param float $newgrade the new maximum grade for the quiz.
>  * @param stdClass $quiz the quiz we are updating. Passed by reference so its
>  *      grade field can be updated too.
>  * @return bool indicating success or failure.
>  * @deprecated since Moodle 4.2. Please use grade_calculator::update_quiz_maximum_grade.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_set_grade($newgrade, $quiz) {
>     debugging('quiz_set_grade is deprecated. ' .
>         'Please use a standard grade_calculator::update_quiz_maximum_grade instead.', DEBUG_DEVELOPER);
>     quiz_settings::create($quiz->id)->get_grade_calculator()->update_quiz_maximum_grade($newgrade);
>     return true;
> }
> 
> /**
>  * Save the overall grade for a user at a quiz in the quiz_grades table
>  *
>  * @param stdClass $quiz The quiz for which the best grade is to be calculated and then saved.
>  * @param int $userid The userid to calculate the grade for. Defaults to the current user.
>  * @param array $attempts The attempts of this user. Useful if you are
>  * looping through many users. Attempts can be fetched in one master query to
>  * avoid repeated querying.
>  * @return bool Indicates success or failure.
>  * @deprecated since Moodle 4.2. Please use grade_calculator::update_quiz_maximum_grade.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_save_best_grade($quiz, $userid = null, $attempts = []) {
>     debugging('quiz_save_best_grade is deprecated. ' .
>         'Please use a standard grade_calculator::recompute_final_grade instead.', DEBUG_DEVELOPER);
>     quiz_settings::create($quiz->id)->get_grade_calculator()->recompute_final_grade($userid, $attempts);
>     return true;
> }
> 
> /**
>  * Calculate the overall grade for a quiz given a number of attempts by a particular user.
>  *
>  * @param stdClass $quiz    the quiz settings object.
>  * @param array $attempts an array of all the user's attempts at this quiz in order.
>  * @return float          the overall grade
>  * @deprecated since Moodle 4.2. No direct replacement.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_calculate_best_grade($quiz, $attempts) {
>     debugging('quiz_calculate_best_grade is deprecated with no direct replacement. It was only used ' .
>         'in one place in the quiz code so this logic is now private to grade_calculator.', DEBUG_DEVELOPER);
> 
>     switch ($quiz->grademethod) {
> 
>         case QUIZ_ATTEMPTFIRST:
>             $firstattempt = reset($attempts);
>             return $firstattempt->sumgrades;
> 
>         case QUIZ_ATTEMPTLAST:
>             $lastattempt = end($attempts);
>             return $lastattempt->sumgrades;
> 
>         case QUIZ_GRADEAVERAGE:
>             $sum = 0;
>             $count = 0;
>             foreach ($attempts as $attempt) {
>                 if (!is_null($attempt->sumgrades)) {
>                     $sum += $attempt->sumgrades;
>                     $count++;
>                 }
>             }
>             if ($count == 0) {
>                 return null;
>             }
>             return $sum / $count;
> 
>         case QUIZ_GRADEHIGHEST:
>         default:
>             $max = null;
>             foreach ($attempts as $attempt) {
>                 if ($attempt->sumgrades > $max) {
>                     $max = $attempt->sumgrades;
>                 }
>             }
>             return $max;
>     }
> }
> 
> /**
>  * Return the attempt with the best grade for a quiz
>  *
>  * Which attempt is the best depends on $quiz->grademethod. If the grade
>  * method is GRADEAVERAGE then this function simply returns the last attempt.
>  * @return stdClass         The attempt with the best grade
>  * @param stdClass $quiz    The quiz for which the best grade is to be calculated
>  * @param array $attempts An array of all the attempts of the user at the quiz
>  * @deprecated since Moodle 4.2. No direct replacement.
>  * @todo MDL-76612 Final deprecation in Moodle 4.6
>  */
> function quiz_calculate_best_attempt($quiz, $attempts) {
>     debugging('quiz_calculate_best_attempt is deprecated with no direct replacement. ' .
>         'It was not used anywhere!', DEBUG_DEVELOPER);
> 
>     switch ($quiz->grademethod) {
> 
>         case QUIZ_ATTEMPTFIRST:
>             foreach ($attempts as $attempt) {
>                 return $attempt;
>             }
>             break;
> 
>         case QUIZ_GRADEAVERAGE: // We need to do something with it.
>         case QUIZ_ATTEMPTLAST:
>             foreach ($attempts as $attempt) {
>                 $final = $attempt;
>             }
>             return $final;
> 
>         default:
>         case QUIZ_GRADEHIGHEST:
>             $max = -1;
>             foreach ($attempts as $attempt) {
>                 if ($attempt->sumgrades > $max) {
>                     $max = $attempt->sumgrades;
>                     $maxattempt = $attempt;
>                 }
>             }
>             return $maxattempt;
>     }