83 lines
2.2 KiB
PHP
83 lines
2.2 KiB
PHP
<?php namespace MapGuesser\Repository;
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use Generator;
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use MapGuesser\Database\Query\Select;
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use MapGuesser\PersistentData\Model\Map;
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use MapGuesser\PersistentData\Model\Place;
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use MapGuesser\PersistentData\PersistentDataManager;
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class PlaceRepository
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{
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private PersistentDataManager $pdm;
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public function __construct()
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{
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$this->pdm = new PersistentDataManager();
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}
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public function getById(int $placeId): ?Place
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{
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return $this->pdm->selectFromDbById($placeId, Place::class);
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}
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public function getAllForMap(Map $map): Generator
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{
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$select = new Select(\Container::$dbConnection);
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$select->where('map_id', '=', $map->getId());
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yield from $this->pdm->selectMultipleFromDb($select, Place::class);
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}
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//TODO: use Map instead of id
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public function getRandomNForMapWithValidPano(int $mapId, int $n, array $exclude = []): array
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{
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$places = [];
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for ($i = 1; $i <= $n; ++$i) {
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$place = $this->getRandomForMapWithValidPano($mapId, $exclude);
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$places[] = $place;
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$exclude[] = $place->getId();
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}
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return $places;
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}
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//TODO: use Map instead of id
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public function getRandomForMapWithValidPano(int $mapId, array $exclude = []): Place
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{
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do {
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$place = $this->selectRandomFromDbForMap($mapId, $exclude);
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$panoId = $place->getFreshPanoId();
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if ($panoId === null) {
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$exclude[] = $place->getId();
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}
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} while ($panoId === null);
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return $place;
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}
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private function selectRandomFromDbForMap(int $mapId, array $exclude): Place
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{
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//TODO: omit table name here
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$select = new Select(\Container::$dbConnection, 'places');
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$select->where('id', 'NOT IN', $exclude);
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$select->where('map_id', '=', $mapId);
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$numberOfPlaces = $select->count();
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//TODO: prevent this
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if ($numberOfPlaces === 0) {
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throw new \Exception('There is no selectable place (count was 0).');
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}
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$randomOffset = random_int(0, $numberOfPlaces - 1);
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$select->orderBy('id');
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$select->limit(1, $randomOffset);
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return $this->pdm->selectFromDb($select, Place::class);
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}
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}
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