add server pinger

src/main/java/cc.fascinated/service/PlayerService.java

@@ -0,0 +1,93 @@
+package cc.fascinated.service;
+
+import cc.fascinated.common.PlayerUtils;
+import cc.fascinated.common.Tuple;
+import cc.fascinated.common.UUIDUtils;
+import cc.fascinated.exception.impl.BadRequestException;
+import cc.fascinated.exception.impl.ResourceNotFoundException;
+import cc.fascinated.model.cache.CachedPlayer;
+import cc.fascinated.model.cache.CachedPlayerName;
+import cc.fascinated.model.mojang.MojangProfile;
+import cc.fascinated.model.mojang.MojangUsernameToUuid;
+import cc.fascinated.model.player.Cape;
+import cc.fascinated.model.player.Player;
+import cc.fascinated.model.player.Skin;
+import cc.fascinated.repository.PlayerCacheRepository;
+import cc.fascinated.repository.PlayerNameCacheRepository;
+import lombok.extern.log4j.Log4j2;
+import net.jodah.expiringmap.ExpirationPolicy;
+import net.jodah.expiringmap.ExpiringMap;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+@Service @Log4j2
+public class PlayerService {
+
+    private final MojangAPIService mojangAPIService;
+    private final PlayerCacheRepository playerCacheRepository;
+    private final PlayerNameCacheRepository playerNameCacheRepository;
+
+    @Autowired
+    public PlayerService(MojangAPIService mojangAPIService, PlayerCacheRepository playerCacheRepository, PlayerNameCacheRepository playerNameCacheRepository) {
+        this.mojangAPIService = mojangAPIService;
+        this.playerCacheRepository = playerCacheRepository;
+        this.playerNameCacheRepository = playerNameCacheRepository;
+    }
+
+    /**
+     * Get a player from the cache or
+     * from the Mojang API.
+     *
+     * @param id the id of the player
+     * @return the player
+     */
+    public CachedPlayer getPlayer(String id) {
+        UUID uuid = PlayerUtils.getUuidFromString(id);
+        if (uuid == null) { // If the id is not a valid uuid, get the uuid from the username
+            uuid = usernameToUuid(id);
+        }
+
+        Optional<CachedPlayer> cachedPlayer = playerCacheRepository.findById(uuid);
+        if (cachedPlayer.isPresent()) { // Return the cached player if it exists
+            return cachedPlayer.get();
+        }
+
+        MojangProfile mojangProfile = mojangAPIService.getProfile(uuid.toString());
+        Tuple<Skin, Cape> skinAndCape = mojangProfile.getSkinAndCape();
+        CachedPlayer player = new CachedPlayer(
+                uuid,
+                mojangProfile.getName(),
+                skinAndCape.getLeft(), // Skin
+                skinAndCape.getRight(), // Cape
+                System.currentTimeMillis()
+        );
+
+        playerCacheRepository.save(player);
+        return player;
+    }
+
+    /**
+     * Gets the player's uuid from their username.
+     *
+     * @param username the username of the player
+     * @return the uuid of the player
+     */
+    private UUID usernameToUuid(String username) {
+        Optional<CachedPlayerName> cachedPlayerName = playerNameCacheRepository.findById(username);
+        if (cachedPlayerName.isPresent()) {
+            return cachedPlayerName.get().getUniqueId();
+        }
+        MojangUsernameToUuid mojangUsernameToUuid = mojangAPIService.getUuidFromUsername(username);
+        if (mojangUsernameToUuid == null) {
+            throw new ResourceNotFoundException("Player with username '%s' not found".formatted(username));
+        }
+        UUID uuid = UUIDUtils.addDashes(mojangUsernameToUuid.getId());
+        playerNameCacheRepository.save(new CachedPlayerName(username, uuid));
+        return uuid;
+    }
+}