532 lines
17 KiB
PHP
532 lines
17 KiB
PHP
<?php
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require_once "vendor/autoload.php";
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require_once "AutoStoring.php";
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require_once "ExpressionBuilder.php";
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require_once "globals.php";
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const TEST_ONGOING = "ongoing";
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const TEST_CONCLUDED = "concluded";
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class TestSummary
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{
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public int $challengeN; // Number of challenges
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public int $correctAnswerN; // Number of correct answers
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private float $percentage; // Ratio of correct answers
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// Calculate percentage.
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private function calculatePercentage() : void {
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if ($this->challengeN > 0) {
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$this->percentage = $this->correctAnswerN / (double)$this->challengeN * 100.0;
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} else { // avoid division by zero
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$this->percentage = 0.0;
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}
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}
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function __construct(int $challengeN, int $correctAnswerN)
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{
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$this->challengeN = $challengeN;
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$this->correctAnswerN = $correctAnswerN;
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$this->calculatePercentage();
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}
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// Get challenge count.
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function getChallengeN(): int
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{
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return $this->challengeN;
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}
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// Get number of correct answers.
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function getCorrectAnswerN(): int
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{
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return $this->correctAnswerN;
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}
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function setCorrectAnswerN(int $correctAnswerN): void
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{
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$this->correctAnswerN = $correctAnswerN;
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$this->calculatePercentage();
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}
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// Get ratio of correct results.
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function getPercentage(): float
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{
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return ($this->correctAnswerN * 100.0) / $this->challengeN;
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}
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// Build from array.
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static function fromArray(array $a): TestSummary
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{
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return new TestSummary($a["challenge_n"], $a["correct_answer_n"]);
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}
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// Convert to array.
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function toArray(): array
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{
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return ["challenge_n" => $this->challengeN, "correct_answer_n" => $this->correctAnswerN, "percentage" => $this->percentage];
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}
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}
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class Test extends AutoStoring
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{
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const TEST_ONGOING = "ongoing";
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const TEST_CONCLUDED = "concluded";
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// ---------
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public int $id; // ID
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public int $gameId; // ID of associated game
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public string $gameName; // Name of the associated game
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public string $nickname; // Associated user's nickname
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public string $state; // State of the test (ongoing/concluded)
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public bool $timeLimited; // The user is allowed to submit the test in a given period of time.
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public bool $repeatable; // Is the user allowed to take this test multiple times?
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public int $startTime; // Start time (UNIX timestamp)
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public int $endTime; // End time (UNIX timestamp)
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public int $endLimitTime; // Time limit on test submission (UNIX timestamp)
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public TestSummary $summary; // Summmary, if game has ended
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public array $challenges; // Test challenges
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private TestMgr $testMgr; // Reference to TestMgr managing this Test instance
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// -------------
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// Preprocess challenges.
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private function preprocessChallenges(): void
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{
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foreach ($this->challenges as &$ch) {
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shuffle($ch["answers"]); // shuffle answers
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$ch["correct_answer"] = array_search($ch["correct_answer"], $ch["answers"]); // remap correct answer
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$ch["player_answer"] = -1; // create player answer field
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}
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}
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// -------------
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// Store modifications.
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public function storeMods(): void
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{
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$this->testMgr->updateTest($this);
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}
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// -------------
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// Construct new test based on Game and User objects
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function __construct(TestMgr &$testMgr, Game|array &$game_array, User &$user = null)
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{
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parent::__construct();
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$this->testMgr = $testMgr;
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$this->id = -1;
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if (is_array($game_array)) { // populating fields from an array
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$a = &$game_array;
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$this->id = $a["_id"] ?? -1;
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$this->gameId = $a["gameid"];
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$this->gameName = $a["gamename"];
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$this->nickname = $a["nickname"];
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$this->state = $a["state"];
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$this->timeLimited = $a["time_limited"];
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$this->startTime = $a["start_time"];
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$this->endTime = $a["end_time"] ?? 0;
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$this->endLimitTime = $a["end_limit_time"] ?? 0;
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$this->repeatable = $a["repeatable"];
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$this->challenges = $a["challenges"];
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if (isset($a["summary"])) {
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$this->summary = TestSummary::fromArray($a["summary"]);
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} else { // backward compatibility
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$this->summary = new TestSummary(count($a["challenges"]), 0);
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}
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} else { // populating fields from Game and User objects
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$game = &$game_array;
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$this->endTime = 0;
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// Fill-in basic properties
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$this->gameId = $game->getId();
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$this->gameName = $game->getName();
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$this->challenges = $game->getChallenges();
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$this->preprocessChallenges();
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$this->nickname = $user->getNickname();
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$this->state = self::TEST_ONGOING;
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$gp = $game->getProperties();
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$this->timeLimited = (($gp["time_limit"] ?: -1) > -1);
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$now = time();
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$this->startTime = $now;
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if ($this->timeLimited) {
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$this->endLimitTime = $now + $gp["time_limit"];
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} else {
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$this->endLimitTime = -1; // dummy value, not used, since timeLimited is false
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}
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$this->repeatable = $gp["repeatable"];
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// Create a blank summary
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$this->summary = new TestSummary(count($this->challenges), 0);
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}
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// auto-conclude time-constrained test if expired
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if ($this->timeLimited && $this->isOngoing() && ($this->endLimitTime <= time())) {
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$this->concludeTest();
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$this->endTime = $this->endLimitTime; // date back end time to the limiting value
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}
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}
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// Convert test to array.
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function toArray(array $omit = []): array
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{
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$a = [
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"_id" => $this->id,
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"gameid" => $this->gameId,
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"nickname" => $this->nickname,
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"gamename" => $this->gameName,
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"state" => $this->state,
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"time_limited" => $this->timeLimited,
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"start_time" => $this->startTime,
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"end_time" => $this->endTime,
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"end_limit_time" => $this->endLimitTime,
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"repeatable" => $this->repeatable,
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"challenges" => $this->challenges,
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"summary" => $this->summary->toArray()
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];
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// omit specific fields
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foreach ($omit as $field) {
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unset($a[$field]);
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}
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return $a;
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}
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// Get number of challenges.
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function getChallengeCount(): int
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{
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return count($this->challenges);
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}
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// Save answer. Asserting $safe prevents saving answers to a concluded test.
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function saveAnswer(int $chidx, int $ansidx, bool $safe = true): bool
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{
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if (!$safe || $this->state === self::TEST_ONGOING) {
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if (($chidx < $this->getChallengeCount()) && ($ansidx < $this->challenges[$chidx]["answers"])) {
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$this->challenges[$chidx]["player_answer"] = $ansidx;
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$this->commitMods();
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return true;
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}
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}
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return false;
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}
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// Clear answer.
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function clearAnswer(int $chidx, bool $safe = true): bool
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{
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if (!$safe || $this->state === self::TEST_ONGOING) {
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if ($chidx < $this->getChallengeCount()) {
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$this->challenges[$chidx]["player_answer"] = -1;
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$this->commitMods();
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return true;
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}
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}
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return false;
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}
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// Conclude test.
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function concludeTest(): void
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{
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// check the answers
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$cans_n = 0; // number of correct answers
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foreach ($this->challenges as &$ch) {
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if ($ch["player_answer"] === $ch["correct_answer"]) {
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$cans_n++;
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}
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}
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// set state and fill summary
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$this->state = TEST_CONCLUDED;
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$this->endTime = time();
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$this->summary->setCorrectAnswerN($cans_n);
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// save test
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$this->commitMods();
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}
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// --------
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public function getId(): int
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{
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return $this->id;
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}
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public function getStartTime(): int
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{
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return $this->startTime;
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}
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public function getEndTime(): int
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{
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return $this->endTime;
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}
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public function getSummary(): TestSummary
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{
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return $this->summary;
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}
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public function getNickname(): string
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{
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return $this->nickname;
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}
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public function getGameId(): int
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{
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return $this->gameId;
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}
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public function isConcluded() : bool
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{
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return $this->state === self::TEST_CONCLUDED;
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}
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public function isOngoing() : bool
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{
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return $this->state === self::TEST_ONGOING;
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}
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}
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class TestMgr
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{
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private \SleekDB\Store $db; // test database
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// -------------
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// Update timed tests.
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// function updateTimedTests(array $test_data_array)
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// {
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// $now = time();
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// foreach ($test_data_array as $test_data) {
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// // look for unprocessed expired tests
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// if (($test_data["state"] === TEST_ONGOING) && ($test_data["time_limited"]) && ($test_data["end_limit_time"] < $now)) {
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// conclude_test($test_data["_id"]);
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// }
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// }
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// }
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// -------------
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function __construct()
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{
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$this->db = new \SleekDB\Store(TESTDB, DATADIR, ["timeout" => false]);
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}
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// Get test by ID from the database.
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function getTest(string $testid): Test|null
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{
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$test_data_array = $this->db->findById($testid);
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return count($test_data_array) != 0 ? new Test($this, $test_data_array) : null;
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}
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// Update test in the database.
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function updateTest(Test &$test): void {
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$a = $test->toArray();
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$this->db->update($a);
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}
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// Add test to the database.
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function addTest(Game &$game, User &$user): Test {
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// create new test
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$test = new Test($this,$game, $user);
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// insert into database
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$a = $test->toArray(["_id"]);
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$a = $this->db->insert($a);
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$test = new Test($this,$a);
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return $test;
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}
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function addOrContinueTest(Game &$game, User &$user): Test|null {
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// check if the user had taken this test before
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$fetch_criteria = [["gameid", "=", (int)$game->getId()], "AND", ["nickname", "=", $user->getNickname()]];
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$previous_tests = $this->db->findBy($fetch_criteria);
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if (count($previous_tests) > 0) { // if there are previous attempts, then...
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fetch:
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// re-fetch tests, look only for ongoing
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$ongoing_tests = $this->db->findBy([$fetch_criteria, "AND", ["state", "=", TEST_ONGOING]]);
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if (count($ongoing_tests) !== 0) { // if there's an ongoing test
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$testid = $ongoing_tests[0]["_id"];
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$test = $this->getTest($testid);
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if ($test->isConcluded()) { // tests get concluded if they got found to be expired
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goto fetch; // like a loop...
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}
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return $test;
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} else { // there's no ongoing test
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if ($game->getProperties()["repeatable"]) { // test is repeatable...
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goto add_test;
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} else { // test is non-repeatable, cannot be attempted more times
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return null;
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}
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}
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} else { // there were no previous attempts
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goto add_test;
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}
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// ----------------
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add_test:
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return $this->addTest($game, $user);
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}
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// Delete test from the database.
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function deleteTest(string $testid): void {
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$this->db->deleteById($testid);
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}
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// Get concluded tests by game ID and nickname.
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function getConcludedTests(string $gameid, string $nickname): array {
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$fetch_criteria = [["gameid", "=", (int)$gameid], "AND", ["nickname", "=", $nickname], "AND", ["state", "=", Test::TEST_CONCLUDED]];
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$test_data_array = $this->db->findBy($fetch_criteria);
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$tests = [];
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foreach ($test_data_array as $a) {
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$tests[] = new Test($this, $a);
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}
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return $tests;
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}
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// Get test results by game ID.
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function getResultsByGameId(string $gameid, string $filter, string $orderby, bool $exclude_challenge_data): array
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{
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$qb = $this->db->createQueryBuilder();
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$qb = $qb->where(["gameid", "=", (int)$gameid]);
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// filtering
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if (trim($filter) !== "") {
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// auto complete starting and ending parenthesis
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if (!str_starts_with($filter, "(")) {
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$filter = "(" . $filter;
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}
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if (!str_ends_with($filter, ")")) {
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$filter = $filter . ")";
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}
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$criteria = ExpressionBuilder::buildQuery($filter);
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$qb->where($criteria);
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}
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// ordering
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if (trim($orderby) !== "") {
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$ordering = ExpressionBuilder::buildOrdering($orderby);
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$qb->orderBy($ordering);
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}
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// excluding challenge data
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if ($exclude_challenge_data) {
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$qb->except(["challenges"]);
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}
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$test_data_array = $qb->getQuery()->fetch();
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return $test_data_array;
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}
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// Generate detailed statistics.
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function generateDetailedStats(string $gameid, array $testids): array
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{
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if ((count($testids) === 0) || ($gameid === "")) {
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return [];
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}
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// fetch relevant entries
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$qb = $this->db->createQueryBuilder();
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$criteria = [["gameid", "=", (int)$gameid], "AND", ["state", "=", "concluded"], "AND", ["_id", "IN", $testids]];
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$qb->where($criteria);
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$qb->select(["challenges"]);
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$entries = $qb->getQuery()->fetch();
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$challenge_indices = [];
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// count answers
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$aggregated = [];
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foreach ($entries as $entry) {
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foreach ($entry["challenges"] as $challenge) {
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$correct_answer = $challenge["answers"][$challenge["correct_answer"]];
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$compound = $challenge["question"] . $correct_answer . count($challenge["answers"]) . $challenge["image_url"];
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$idhash = md5($compound);
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// if this is a new challenge to the list...
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if (!isset($challenge_indices[$idhash])) {
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$challenge_indices[$idhash] = count($challenge_indices);
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$challenge_info = [ // copy challenge info
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"hash" => $idhash,
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"image_url" => $challenge["image_url"],
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"question" => $challenge["question"],
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"answers" => $challenge["answers"],
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"correct_answer" => $correct_answer,
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"player_answers" => array_fill(0, count($challenge["answers"]), 0),
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"answer_count" => count($challenge["answers"]),
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];
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$aggregated[$challenge_indices[$idhash]] = $challenge_info; // insert challenge info
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}
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// fetch challenge index
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$challenge_idx = $challenge_indices[$idhash];
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// add up player answer
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$answer_idx = array_search($challenge["answers"][$challenge["player_answer"]], $aggregated[$challenge_idx]["answers"]); // transform player answer index to report answer index
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$aggregated[$challenge_idx]["player_answers"][(int)$answer_idx]++;
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}
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}
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// produce derived info
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foreach ($aggregated as &$entry) {
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$entry["answer_ratio"] = $entry["player_answers"];
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$answer_n = count($entry["answer_ratio"]);
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$sum = array_sum($entry["player_answers"]);
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if ($sum === 0) {
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continue;
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}
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for ($i = 0; $i < $answer_n; $i++) {
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$entry["answer_ratio"][$i] = $entry["player_answers"][$i] / $sum;
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}
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}
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// match challenges
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return $aggregated;
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}
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// Upgrade test. Just load tests and save them.
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function upgradeTests(array $ids = []) : void {
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$a = [];
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if ($ids === []) {
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$a = $this->db->findAll();
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} else {
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$a = $this->db->findBy(["_id", "IN", $ids]);
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}
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foreach ($a as $t) {
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$test = new Test($this, $t);
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$test->storeMods();
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}
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}
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// Extract timed test IDs. Scan the database for tests with time limit ON.
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function extractExpiredTimedTestIds(bool $ongoingOnly = true) : array {
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$query = [["time_limited", "=", true], "AND", ["end_limit_time", "<", time()]];
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if ($ongoingOnly) {
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$query = [ ...$query, "AND", ["state", "=", TEST_ONGOING]];
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}
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$qb = $this->db->createQueryBuilder();
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$a = $qb->where($query)->select(["_id"])->orderBy(["_id" => "ASC"])->getQuery()->fetch();
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return array_map(fn($a) => $a["_id"], $a);
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}
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} |