mapguesser/src/Repository/PlaceRepository.php
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use sql field names with tables where join happens
2023-05-02 18:10:22 +02:00

195 lines
7.5 KiB
PHP

<?php namespace MapGuesser\Repository;
use Generator;
use SokoWeb\Database\Query\Select;
use MapGuesser\PersistentData\Model\Challenge;
use MapGuesser\PersistentData\Model\Map;
use MapGuesser\PersistentData\Model\Place;
class PlaceRepository
{
public function getById(int $placeId): ?Place
{
return \Container::$persistentDataManager->selectFromDbById($placeId, Place::class);
}
public function getAllForMap(Map $map): Generator
{
$select = new Select(\Container::$dbConnection);
$select->where('map_id', '=', $map->getId());
yield from \Container::$persistentDataManager->selectMultipleFromDb($select, Place::class);
}
//TODO: use Map and User instead of id
public function getRandomNPlaces(int $mapId, int $n, ?int $userId): array
{
if (!isset($userId)) { // anonymous single player
return $this->getRandomNForMapWithValidPano($mapId, $n);
} else { // authorized user or multiplayer game with selection based on what the host played before
$unvisitedPlaces = $this->getRandomUnvisitedNForMapWithValidPano($mapId, $n, $userId);
if (count($unvisitedPlaces) == $n) {
return $unvisitedPlaces;
}
$oldPlaces = $this->getRandomOldNForMapWithValidPano($mapId, $n - count($unvisitedPlaces), $userId);
return array_merge($unvisitedPlaces, $oldPlaces);
}
}
//TODO: use Map instead of id
private function getRandomNForMapWithValidPano(int $mapId, int $n): array
{
$places = [];
$select = new Select(\Container::$dbConnection, 'places');
$select->where('map_id', '=', $mapId);
$numberOfPlaces = $select->count();
$exclude = [];
for ($i = 1; $i <= $n; ++$i) {
$place = $this->getRandomForMapWithValidPano($numberOfPlaces, $select, $exclude);
$places[] = $place;
$exclude[] = $place->getId();
}
return $places;
}
private function getRandomForMapWithValidPano(int $numberOfPlaces, Select $select, array &$exclude, ?callable $pickRandomInt = null): ?Place
{
do {
$numberOfPlacesLeft = $numberOfPlaces - count($exclude);
$place = $this->selectRandomFromDbForMap($numberOfPlacesLeft, $select, $exclude, $pickRandomInt);
if ($place === null) {
// there is no more never visited place left
return null;
}
$panoId = $place->getFreshPanoId();
if ($panoId === null) {
$exclude[] = $place->getId();
}
} while ($panoId === null);
return $place;
}
private function selectRandomFromDbForMap(int $numberOfPlacesLeft, Select $select, array $exclude, ?callable $pickRandomInt): ?Place
{
if ($numberOfPlacesLeft <= 0)
return null;
if (!isset($pickRandomInt)) {
$randomOffset = random_int(0, $numberOfPlacesLeft - 1);
} else {
$randomOffset = $pickRandomInt($numberOfPlacesLeft);
}
$select->where('id', 'NOT IN', $exclude);
$select->limit(1, $randomOffset);
return \Container::$persistentDataManager->selectFromDb($select, Place::class);
}
// Never visited places
private function getRandomUnvisitedNForMapWithValidPano(int $mapId, int $n, int $userId): array
{
$places = [];
$exclude = [];
// list of places visited by user
$selectPlacesByCurrentUser = new Select(\Container::$dbConnection, 'user_played_place');
$selectPlacesByCurrentUser->columns(['place_id', 'last_time']);
$selectPlacesByCurrentUser->where('user_id', '=', $userId);
$selectPlacesByCurrentUser->setDerivedTableAlias('places_by_current_user');
// count the places never visited
$selectUnvisited = new Select(\Container::$dbConnection, 'places');
$selectUnvisited->leftJoin($selectPlacesByCurrentUser, ['places', 'id'], '=', ['places_by_current_user', 'place_id']);
$selectUnvisited->where('map_id', '=', $mapId);
$selectUnvisited->where(['places_by_current_user', 'last_time'], '=', null);
$numberOfUnvisitedPlaces = $selectUnvisited->count();
// look for as many new places as possible but maximum $n
do {
$place = $this->getRandomForMapWithValidPano($numberOfUnvisitedPlaces, $selectUnvisited, $exclude);
if (isset($place)) {
$places[] = $place;
$exclude[] = $place->getId();
}
} while (count($places) < $n && isset($place));
return $places;
}
// Places visited in the longest time
private function getRandomOldNForMapWithValidPano(int $mapId, int $n, int $userId): array
{
$places = [];
$exclude = [];
// list of places visited by user
$selectPlacesByCurrentUser = new Select(\Container::$dbConnection, 'user_played_place');
$selectPlacesByCurrentUser->columns(['place_id', 'last_time']);
$selectPlacesByCurrentUser->where('user_id', '=', $userId);
$selectPlacesByCurrentUser->setDerivedTableAlias('places_by_current_user');
// count places that were visited at least once
$selectOldPlaces = new Select(\Container::$dbConnection, 'places');
$selectOldPlaces->innerJoin($selectPlacesByCurrentUser, ['places', 'id'], '=', ['places_by_current_user', 'place_id']);
$selectOldPlaces->where('map_id', '=', $mapId);
$numberOfOldPlaces = $selectOldPlaces->count();
// set order by datetime, oldest first
$selectOldPlaces->orderBy('last_time');
// selection algorithm with preference (weighting) for older places using Box-Muller transform
$pickGaussianRandomInt = function($numberOfPlaces) {
$stdev = 0.2;
$avg = 0.0;
$x = mt_rand() / mt_getrandmax();
$y = mt_rand() / mt_getrandmax();
$randomNum = abs(sqrt(-2 * log($x)) * cos(2 * pi() * $y) * $stdev + $avg);
return (int) min($randomNum * $numberOfPlaces, $numberOfPlaces - 1);
};
// look for n - numberOfUnvisitedPlaces places
while (count($places) < $n)
{
$place = $this->getRandomForMapWithValidPano($numberOfOldPlaces, $selectOldPlaces, $exclude, $pickGaussianRandomInt);
if (isset($place))
{
$places[] = $place;
$exclude[] = $place->getId();
}
}
return $places;
}
public function getByRoundInChallenge(Challenge $challenge, int $round): ?Place
{
$select = new Select(\Container::$dbConnection);
$select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
$select->where(['place_in_challenge', 'challenge_id'], '=', $challenge->getId());
$select->orderBy(['place_in_challenge', 'round']);
$select->limit(1, $round);
return \Container::$persistentDataManager->selectFromDb($select, Place::class);
}
public function getAllInChallenge(Challenge $challenge): Generator
{
$select = new Select(\Container::$dbConnection);
$select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
$select->where(['place_in_challenge', 'challenge_id'], '=', $challenge->getId());
$select->orderBy(['place_in_challenge', 'round']);
yield from \Container::$persistentDataManager->selectMultipleFromDb($select, Place::class);
}
}