Merge branch 'master' into develop-bloodmoon

common/src/main/java/eu/mhsl/craftattack/spawn/common/api/repositories/CraftAttackReportRepository.java

@@ -11,15 +11,14 @@ public class CraftAttackReportRepository extends ReportRepository {
 
     public ReqResp<PlayerReports> queryReports(UUID player) {
         return this.get(
-            "report",
-            (parameters) -> parameters.addParameter("uuid", player.toString()),
+            "users/%s/reports".formatted(player.toString()),
             PlayerReports.class
         );
     }
 
     public ReqResp<ReportUrl> createReport(ReportCreationInfo data) {
         return this.post(
-            "report",
+            "reports",
             data,
             ReportUrl.class
         );

common/src/main/java/eu/mhsl/craftattack/spawn/common/api/repositories/ReportRepository.java

@@ -23,19 +23,18 @@ public abstract class ReportRepository extends HttpRepository {
 
     public record PlayerReports(
         List<Report> from_self,
-        Object to_self
+        List<Report> to_self
     ) {
         public record Report(
-            @Nullable Reporter reported,
-            @NotNull String subject,
-            boolean draft,
-            @NotNull String status,
+            @Nullable UUID reported,
+            @NotNull String reason,
+            @Nullable Long created,
+            @Nullable Status status,
             @NotNull String url
         ) {
-            public record Reporter(
-                @NotNull String username,
-                @NotNull String uuid
-            ) {
+            public enum Status {
+                open,
+                closed,
             }
         }
     }

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/metaGameplay/infoBars/InfoBarSetting.java

@@ -46,6 +46,4 @@ public class InfoBarSetting extends MultiBoolSetting<InfoBarSetting.InfoBarConfi
     public Class<?> dataType() {
         return InfoBarConfiguration.class;
     }
-
-
 }

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/metaGameplay/infoBars/InfoBars.java

@@ -1,25 +1,18 @@
 package eu.mhsl.craftattack.spawn.common.appliances.metaGameplay.infoBars;
 
 import eu.mhsl.craftattack.spawn.common.appliances.metaGameplay.settings.Settings;
-import eu.mhsl.craftattack.spawn.core.Main;
 import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
 import eu.mhsl.craftattack.spawn.core.appliance.ApplianceCommand;
 import eu.mhsl.craftattack.spawn.common.appliances.metaGameplay.infoBars.bars.MsptBar;
 import eu.mhsl.craftattack.spawn.common.appliances.metaGameplay.infoBars.bars.PlayerCounterBar;
 import eu.mhsl.craftattack.spawn.common.appliances.metaGameplay.infoBars.bars.TpsBar;
-import org.bukkit.Bukkit;
-import org.bukkit.NamespacedKey;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Listener;
-import org.bukkit.persistence.PersistentDataContainer;
-import org.bukkit.persistence.PersistentDataType;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.ArrayList;
 import java.util.List;
 
 public class InfoBars extends Appliance {
-    private final NamespacedKey infoBarKey = new NamespacedKey(Main.instance(), "infobars");
     private final List<Bar> infoBars = List.of(
         new TpsBar(),
         new MsptBar(),
@@ -27,41 +20,19 @@ public class InfoBars extends Appliance {
     );
 
     public void showAllEnabled(Player player) {
-        this.getEnabledBars(player).forEach(bar -> this.show(player, bar));
+        InfoBarSetting.InfoBarConfiguration config = Settings.instance().getSetting(player, Settings.Key.InfoBars, InfoBarSetting.InfoBarConfiguration.class);
+        this.setVisible(player, MsptBar.name, config.mspt());
+        this.setVisible(player, PlayerCounterBar.name, config.playerCounter());
+        this.setVisible(player, TpsBar.name, config.tps());
     }
 
-    public void hideAllEnabled(Player player) {
-        this.getEnabledBars(player).forEach(bar -> this.hide(player, bar));
-        this.setEnabledBars(player, List.of());
-    }
-
-    public void show(Player player, String bar) {
+    public void setVisible(Player player, String bar, boolean visible) {
         this.validateBarName(bar);
-        List<String> existingBars = new ArrayList<>(this.getEnabledBars(player));
-        existingBars.add(bar);
-        player.showBossBar(this.getBarByName(bar).getBossBar());
-        this.setEnabledBars(player, existingBars);
-    }
-
-    public void hide(Player player, String bar) {
-        this.validateBarName(bar);
-        List<String> existingBars = new ArrayList<>(this.getEnabledBars(player));
-        existingBars.remove(bar);
-        player.hideBossBar(this.getBarByName(bar).getBossBar());
-        this.setEnabledBars(player, existingBars);
-    }
-
-    private List<String> getEnabledBars(Player player) {
-        PersistentDataContainer container = player.getPersistentDataContainer();
-        if(!container.has(this.infoBarKey)) return List.of();
-        return container.get(this.infoBarKey, PersistentDataType.LIST.strings());
-    }
-
-    private void setEnabledBars(Player player, List<String> bars) {
-        Bukkit.getScheduler().runTask(
-            Main.instance(),
-            () -> player.getPersistentDataContainer().set(this.infoBarKey, PersistentDataType.LIST.strings(), bars)
-        );
+        if(visible) {
+            player.showBossBar(this.getBarByName(bar).getBossBar());
+        } else {
+            player.hideBossBar(this.getBarByName(bar).getBossBar());
+        }
     }
 
     private Bar getBarByName(String name) {
@@ -79,13 +50,7 @@ public class InfoBars extends Appliance {
     @Override
     public void onEnable() {
         Settings.instance().declareSetting(InfoBarSetting.class);
-        Settings.instance().addChangeListener(InfoBarSetting.class, player -> {
-            this.hideAllEnabled(player);
-            InfoBarSetting.InfoBarConfiguration config = Settings.instance().getSetting(player, Settings.Key.InfoBars, InfoBarSetting.InfoBarConfiguration.class);
-            if(config.mspt()) this.show(player, MsptBar.name);
-            if(config.playerCounter()) this.show(player, PlayerCounterBar.name);
-            if(config.tps()) this.show(player, TpsBar.name);
-        });
+        Settings.instance().addChangeListener(InfoBarSetting.class, this::showAllEnabled);
     }
 
     @Override

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/metaGameplay/report/Report.java

@@ -6,6 +6,7 @@ import eu.mhsl.craftattack.spawn.core.api.client.ReqResp;
 import eu.mhsl.craftattack.spawn.common.api.repositories.CraftAttackReportRepository;
 import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
 import eu.mhsl.craftattack.spawn.core.appliance.ApplianceCommand;
+import eu.mhsl.craftattack.spawn.core.util.text.ComponentUtil;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.ComponentBuilder;
 import net.kyori.adventure.text.TextComponent;
@@ -19,7 +20,9 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
+import java.util.function.Function;
 
 public class Report extends Appliance {
     public static Component helpText() {
@@ -78,7 +81,7 @@ public class Report extends Appliance {
                         .appendNewline()
                         .append(
                             Component
-                                .text(createdReport.data().url(), NamedTextColor.GRAY) // URL mit Weltkugel-Emoji
+                                .text(createdReport.data().url(), NamedTextColor.GRAY)
                                 .clickEvent(ClickEvent.clickEvent(ClickEvent.Action.OPEN_URL, createdReport.data().url()))
                         )
                         .appendNewline()
@@ -128,43 +131,50 @@ public class Report extends Appliance {
             return;
         }
 
-        List<ReportRepository.PlayerReports.Report> reports = userReports
-            .data()
-            .from_self()
-            .stream()
-            .filter(report -> !report.draft())
-            .toList()
-            .reversed();
+        Function<List<ReportRepository.PlayerReports.Report>, List<ReportRepository.PlayerReports.Report>> filterClosed = reports -> reports.stream()
+            .filter(report -> Objects.equals(report.status(), ReportRepository.PlayerReports.Report.Status.closed))
+            .toList();
 
-        if(reports.isEmpty()) {
-            issuer.sendMessage(
-                Component.text()
-                    .append(Component.text("Du hast noch niemanden reportet.", NamedTextColor.RED))
-                    .appendNewline()
-                    .append(Component.text("Um jemanden zu melden, nutze /report", NamedTextColor.GRAY))
-            );
-            return;
-        }
+        List<ReportRepository.PlayerReports.Report> reportsToOthers = filterClosed.apply(userReports.data().from_self()).reversed();
+        List<ReportRepository.PlayerReports.Report> reportsToSelf = filterClosed.apply(userReports.data().to_self()).reversed();
 
         ComponentBuilder<TextComponent, TextComponent.Builder> component = Component.text()
-            .append(Component.newline())
-            .append(Component.text("Von dir erstellte Reports: ", NamedTextColor.GOLD))
-            .appendNewline();
+            .append(Component.text(
+                !reportsToSelf.isEmpty()
+                    ? "Du wurdest insgesamt %d mal von anderen Spielern gemeldet.".formatted(reportsToSelf.size())
+                    : "Du wurdest von keinem anderen Spieler gemeldet.",
+                NamedTextColor.GOLD)
+            );
 
-        reports.forEach(report -> {
-            component
-                .append(Component.text(" - ", NamedTextColor.WHITE))
-                .append(
-                    report.reported() != null
-                        ? Component.text(report.reported().username(), NamedTextColor.WHITE)
-                        : Component.text("Unbekannt", NamedTextColor.YELLOW)
-                )
-                .append(Component.text(String.format(": %s", report.subject()), NamedTextColor.GRAY))
+        component.appendNewline();
+
+        component.append(Component.text("Von dir erstellte Reports: ", NamedTextColor.GOLD));
+        reportsToOthers.forEach(report -> {
+            Component button = Component.text("[\uD83D\uDC41/\uD83D\uDD8A]")
                 .clickEvent(ClickEvent.openUrl(report.url()))
-                .hoverEvent(HoverEvent.showText(Component.text("Klicke, um den Report einzusehen.", NamedTextColor.GOLD)));
-            component.appendNewline();
+                .hoverEvent(HoverEvent.showText(ComponentUtil.clickLink(report.url())));
+
+            Component reportedDisplayName = report.reported() != null
+                ? Component.text(Optional.ofNullable(Bukkit.getOfflinePlayer(report.reported()).getName()).orElse(report.reported().toString()), NamedTextColor.WHITE)
+                : Component.text("Unbekannt", NamedTextColor.YELLOW);
+
+            component
+                .appendNewline()
+                .append(Component.text(" \u27A1 ", NamedTextColor.GRAY))
+                .append(button)
+                .append(Component.text(" du gegen ", NamedTextColor.GRAY))
+                .append(reportedDisplayName)
+                .append(Component.text(String.format(": %s", report.reason()), NamedTextColor.GRAY));
         });
 
+        if(reportsToOthers.isEmpty()) {
+            component
+                .appendNewline()
+                .append(Component.text("Du hast noch niemanden reportet.", NamedTextColor.RED))
+                .appendNewline()
+                .append(Component.text("Um jemanden zu melden, nutze /report", NamedTextColor.GRAY));
+        }
+
         issuer.sendMessage(component.build());
     }
 

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/metaGameplay/settings/SettingsShortcutSetting.java

@@ -25,7 +25,7 @@ public class SettingsShortcutSetting extends BoolSetting implements CategorizedS
 
     @Override
     protected Boolean defaultValue() {
-        return false;
+        return true;
     }
 
     @Override

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/security/antiBoatFreecam/AntiBoatFreecam.java

@@ -0,0 +1,51 @@
+package eu.mhsl.craftattack.spawn.common.appliances.security.antiBoatFreecam;
+
+import eu.mhsl.craftattack.spawn.common.appliances.tooling.acInform.AcInform;
+import eu.mhsl.craftattack.spawn.core.Main;
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Boat;
+import org.bukkit.entity.Player;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@SuppressWarnings("unused")
+public class AntiBoatFreecam extends Appliance {
+    private static final float MAX_YAW_OFFSET = 106.0f;
+    private final Map<Player, Float> violatedPlayers = new HashMap<>();
+
+    public AntiBoatFreecam() {
+        Bukkit.getScheduler().runTaskTimerAsynchronously(
+            Main.instance(),
+            () -> Bukkit.getOnlinePlayers().forEach(player -> {
+                if(!(player.getVehicle() instanceof Boat boat)) return;
+                if(!boat.getPassengers().getFirst().equals(player)) return;
+                float playerYaw = player.getYaw();
+                float boatYaw = boat.getYaw();
+
+                float yawDelta = wrapDegrees(playerYaw - boatYaw);
+                if(Math.abs(yawDelta) <= MAX_YAW_OFFSET) return;
+
+                this.violatedPlayers.merge(player, 1f, Float::sum);
+                float violationCount = this.violatedPlayers.get(player);
+                if(violationCount != 1 && violationCount % 100 != 0) return;
+                Main.instance().getAppliance(AcInform.class).notifyAdmins(
+                    "internal",
+                    player.getName(),
+                    "illegalBoatLookYaw",
+                    violationCount
+                );
+            }),
+            1L,
+            1L
+        );
+    }
+
+    private static float wrapDegrees(float deg) {
+        deg = deg % 360f;
+        if (deg >= 180f) deg -= 360f;
+        if (deg < -180f) deg += 360f;
+        return deg;
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/security/antiFormattedBook/AntiFormattedBook.java

@@ -0,0 +1,66 @@
+package eu.mhsl.craftattack.spawn.common.appliances.security.antiFormattedBook;
+
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import net.kyori.adventure.text.*;
+import net.kyori.adventure.text.format.Style;
+import net.kyori.adventure.text.format.TextColor;
+import net.kyori.adventure.text.format.TextDecoration;
+import org.bukkit.event.Listener;
+import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.Objects;
+
+public class AntiFormattedBook extends Appliance {
+    private static final char SECTION = '\u00A7';
+
+    public boolean containsFormatting(BookMeta meta) {
+        if (this.hasFormattingDeep(meta.title())) return true;
+        if (this.hasFormattingDeep(meta.author())) return true;
+
+        for (Component c : meta.pages()) {
+            if (this.hasFormattingDeep(c)) return true;
+        }
+        return false;
+    }
+
+    private boolean hasFormattingDeep(@Nullable Component component) {
+        if(component == null) return false;
+        if (this.hastFormatting(component)) return true;
+
+        if (component instanceof TextComponent tc && tc.content().indexOf(SECTION) >= 0) return true;
+
+        if (component instanceof NBTComponent<?, ?> nbt) {
+            if (nbt.separator() != null && this.hasFormattingDeep(nbt.separator())) return true;
+        }
+
+        for (Component child : component.children()) {
+            if (this.hasFormattingDeep(child)) return true;
+        }
+        return false;
+    }
+
+    private boolean hastFormatting(Component component) {
+        Style style = component.style();
+
+        TextColor color = style.color();
+        if (color != null) return true;
+        if (style.font() != null) return true;
+        if (style.insertion() != null && !Objects.requireNonNull(style.insertion()).isEmpty()) return true;
+
+        for (var decoration : style.decorations().entrySet()) {
+            if (decoration.getValue() == TextDecoration.State.TRUE) return true;
+        }
+
+        return style.hoverEvent() != null || style.clickEvent() != null;
+    }
+
+    @Override
+    protected @NotNull List<Listener> listeners() {
+        return List.of(
+            new BookEditListener()
+        );
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/security/antiFormattedBook/BookEditListener.java

@@ -0,0 +1,36 @@
+package eu.mhsl.craftattack.spawn.common.appliances.security.antiFormattedBook;
+
+import eu.mhsl.craftattack.spawn.common.appliances.tooling.acInform.AcInform;
+import eu.mhsl.craftattack.spawn.core.Main;
+import eu.mhsl.craftattack.spawn.core.appliance.ApplianceListener;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerEditBookEvent;
+import org.bukkit.inventory.meta.BookMeta;
+
+import java.util.List;
+
+class BookEditListener extends ApplianceListener<AntiFormattedBook> {
+    @EventHandler
+    public void onBookEdit(PlayerEditBookEvent event) {
+        Player player = event.getPlayer();
+        BookMeta meta = event.getNewBookMeta();
+
+        if (this.getAppliance().containsFormatting(meta)) {
+            Main.instance().getAppliance(AcInform.class).notifyAdmins(
+                "internal",
+                player.getName(),
+                "illegalBookFormatting",
+                1f
+            );
+
+            BookMeta sanitized = meta.clone();
+            sanitized.title(null);
+            sanitized.author(null);
+            //noinspection ResultOfMethodCallIgnored
+            sanitized.pages(List.of(Component.empty()));
+            event.setNewBookMeta(sanitized);
+        }
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/security/antiIllegalBundlePicker/AntiIllegalBundlePicker.java

@@ -0,0 +1,78 @@
+package eu.mhsl.craftattack.spawn.common.appliances.security.antiIllegalBundlePicker;
+
+import eu.mhsl.craftattack.spawn.common.appliances.tooling.acInform.AcInform;
+import eu.mhsl.craftattack.spawn.core.Main;
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.InventoryView;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.BundleMeta;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class AntiIllegalBundlePicker extends Appliance {
+    private static final int visibleSlotsInBundle = 9;
+
+    public void trackBundle(InventoryClickEvent event) {
+        ItemStack bundle = Objects.requireNonNull(event.getCurrentItem());
+        final int rawSlot = event.getRawSlot();
+        final Player player = (Player) event.getWhoClicked();
+        final InventoryView view = event.getView();
+        final List<ItemStack> before = this.getBundleContents(bundle);
+
+        Bukkit.getScheduler().runTask(Main.instance(), () -> {
+            ItemStack afterStack = view.getItem(rawSlot);
+            if(afterStack == null || afterStack.getType() != Material.BUNDLE) return;
+
+            List<ItemStack> after = this.getBundleContents(afterStack);
+            int removedSlotIndex = this.findRemoved(before, after);
+
+            if(removedSlotIndex >= visibleSlotsInBundle) {
+                Main.instance().getAppliance(AcInform.class).notifyAdmins(
+                    "internal",
+                    player.getName(),
+                    "illegalBundlePick",
+                    (float) removedSlotIndex
+                );
+            }
+        });
+    }
+
+    private int findRemoved(@NotNull List<ItemStack> before, @NotNull List<ItemStack> after) {
+        for (int i = 0; i < Math.max(before.size(), after.size()); i++) {
+            ItemStack a = i < after.size() ? after.get(i) : null;
+            ItemStack b = i < before.size() ? before.get(i) : null;
+
+            if (b == null && a == null) continue;
+            if (b == null) throw new IllegalStateException("Size of bundle was smaller before pickup Action");
+
+            if (a == null) return i;
+            if (!a.isSimilar(b)) return i;
+            if (a.getAmount() != b.getAmount()) return i;
+        }
+        throw new IllegalStateException("Failed to find picked Item in bundle");
+    }
+
+    private List<ItemStack> getBundleContents(@NotNull ItemStack bundle) {
+        if (bundle.getType() != Material.BUNDLE)
+            throw new IllegalStateException("ItemStack is not a bundle");
+
+        BundleMeta meta = (BundleMeta) bundle.getItemMeta();
+        return meta.getItems().stream()
+            .map(ItemStack::clone)
+            .collect(Collectors.toCollection(ArrayList::new));
+    }
+
+    @Override
+    protected @NotNull List<Listener> listeners() {
+        return List.of(
+            new OnBundlePickListener()
+        );
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/security/antiIllegalBundlePicker/OnBundlePickListener.java

@@ -0,0 +1,18 @@
+package eu.mhsl.craftattack.spawn.common.appliances.security.antiIllegalBundlePicker;
+
+import eu.mhsl.craftattack.spawn.core.appliance.ApplianceListener;
+import org.bukkit.Material;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.inventory.InventoryAction;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.ItemStack;
+
+class OnBundlePickListener extends ApplianceListener<AntiIllegalBundlePicker> {
+    @EventHandler
+    public void onBundlePick(InventoryClickEvent event) {
+        if(!event.getAction().equals(InventoryAction.PICKUP_FROM_BUNDLE)) return;
+        final ItemStack bundle = event.getCurrentItem();
+        if (bundle == null || bundle.getType() != Material.BUNDLE) return;
+        this.getAppliance().trackBundle(event);
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/tooling/deviceFingerprinting/DeviceFingerprinting.java

@@ -0,0 +1,177 @@
+package eu.mhsl.craftattack.spawn.common.appliances.tooling.deviceFingerprinting;
+
+import com.google.common.reflect.TypeToken;
+import com.google.gson.Gson;
+import eu.mhsl.craftattack.spawn.core.Main;
+import eu.mhsl.craftattack.spawn.core.api.server.HttpServer;
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import net.kyori.adventure.resource.ResourcePackInfo;
+import net.kyori.adventure.resource.ResourcePackRequest;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerResourcePackStatusEvent;
+import org.jetbrains.annotations.NotNull;
+import spark.Response;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.reflect.Type;
+import java.net.URI;
+import java.util.*;
+
+@Appliance.Flags(enabled = false)
+public class DeviceFingerprinting extends Appliance {
+    public record PackInfo(@NotNull String url, @NotNull UUID uuid, @NotNull String hash) {
+        private static final String failingUrl = "http://127.0.0.1:0";
+        public PackInfo asFailing() {
+            return new PackInfo(failingUrl, this.uuid, this.hash);
+        }
+    }
+
+    public enum PackStatus {
+        UNCACHED,
+        CACHED,
+        INVALID;
+
+        public static PackStatus fromBukkitStatus(PlayerResourcePackStatusEvent.Status status) {
+            return switch(status) {
+                case DISCARDED -> CACHED;
+                case FAILED_DOWNLOAD -> UNCACHED;
+                default -> INVALID;
+            };
+        }
+    }
+
+    public enum PlayerStatus {
+        PREPARATION,
+        TESTING,
+        FINISHED,
+        NEW
+    }
+
+    private List<PackInfo> packs;
+    private final Map<Player, FingerprintData> fingerprints = new WeakHashMap<>();
+    private final UUID basePackId = UUID.randomUUID();
+
+    @Override
+    public void onEnable() {
+        this.packs = this.readPacksFromConfig();
+    }
+
+    public void startFingerprinting(Player player) {
+        this.fingerprints.put(player, FingerprintData.create(player));
+        Main.logger().info(String.format("Sending base ressource-pack with id '%s' to '%s'%n", this.basePackId, player.getName()));
+        this.sendPack(player, new PackInfo("http://localhost:8080/api/devicefingerprinting/base.zip", this.basePackId, "3296e8bdd30b4f7cffd11c780a1dc70da2948e71"));
+    }
+
+    public void onPackUpdate(Player player, UUID packId, PlayerResourcePackStatusEvent.Status status) {
+        if(!this.fingerprints.containsKey(player)) return;
+        FingerprintData playerFingerprint = this.fingerprints.get(player);
+        if(!playerFingerprint.isInTestingOrPreparation()) return;
+
+        if(packId.equals(this.basePackId)) {
+            Main.logger().info(String.format("Base pack for '%s' updated: '%s'", player.getName(), status));
+
+            if(status != PlayerResourcePackStatusEvent.Status.ACCEPTED) return;
+            Main.logger().info(String.format("Base pack loaded successfully, sending now all packs to '%s'...", player.getName()));
+            playerFingerprint.setTesting();
+            this.packs.forEach(pack -> this.sendPack(player, pack.asFailing()));
+            return;
+        }
+
+        PackInfo pack = this.packs.stream()
+            .filter(packInfo -> Objects.equals(packInfo.uuid, packId))
+            .findAny()
+            .orElse(null);
+        if(pack == null) return;
+        int packIndex = this.packs.indexOf(pack);
+
+        List<PackStatus> pendingPacks = playerFingerprint.getPendingPacks();
+        PackStatus newPackStatus = PackStatus.fromBukkitStatus(status);
+        if(newPackStatus == PackStatus.INVALID) return;
+        pendingPacks.set(packIndex, newPackStatus);
+
+        playerFingerprint.updateFingerprint();
+        if(Objects.requireNonNull(playerFingerprint.getStatus()) == PlayerStatus.NEW) {
+            Main.logger().info(String.format("Sending fingerprint packs to Player '%s', as it is a unseen Player!", player.getName()));
+            this.sendNewFingerprint(player, Objects.requireNonNull(playerFingerprint.getFingerPrint()));
+        }
+    }
+
+    private void sendNewFingerprint(Player player, long fingerprintId) {
+        for (int i = 0; i < this.packs.size(); i++) {
+            if ((fingerprintId & (1L << i)) != 0) {
+                PackInfo pack = this.packs.get(i);
+                this.sendPack(player, pack);
+            }
+        }
+    }
+
+    public void sendPack(Player player, PackInfo pack) {
+        player.sendResourcePacks(
+            ResourcePackRequest.resourcePackRequest()
+                .required(true)
+                .packs(ResourcePackInfo.resourcePackInfo(pack.uuid, URI.create(pack.url), pack.hash))
+        );
+    }
+
+    private List<DeviceFingerprinting.PackInfo> readPacksFromConfig() {
+        try (InputStreamReader reader = new InputStreamReader(Objects.requireNonNull(Main.class.getResourceAsStream("/deviceFingerprinting/packs.json")))) {
+            Type packListType = new TypeToken<List<DeviceFingerprinting.PackInfo>>(){}.getType();
+            List<DeviceFingerprinting.PackInfo> packs = new Gson().fromJson(reader, packListType);
+            if (packs.isEmpty()) throw new IllegalStateException("No resource packs found in packs.json.");
+            return packs;
+        } catch (IOException e) {
+            throw new IllegalStateException("Failed to parse packs.json.", e);
+        }
+    }
+
+    @Override
+    public void httpApi(HttpServer.ApiBuilder apiBuilder) {
+        apiBuilder.rawGet(
+            "base.zip",
+            (request, response) -> this.servePack("base.zip", response)
+        );
+
+        for(int i = 0; i < this.packs.size(); i++) {
+            int packIndex = i;
+            apiBuilder.rawGet(
+                String.format("packs/%d", i),
+                (request, response) -> this.servePack(String.valueOf(packIndex), response)
+            );
+        }
+    }
+
+    private Object servePack(String name, Response response) {
+        try {
+            String resourcePath = String.format("/deviceFingerprinting/packs/%s", name);
+            var inputStream = Main.class.getResourceAsStream(resourcePath);
+
+            if (inputStream == null) {
+                throw new IllegalStateException("Pack file not found: " + resourcePath);
+            }
+
+            response.header("Content-Type", "application/zip");
+            response.header("Content-Disposition", String.format("attachment; filename=\"pack-%s.zip\"", name));
+
+            var outputStream = response.raw().getOutputStream();
+            inputStream.transferTo(outputStream);
+            outputStream.close();
+
+            return HttpServer.nothing;
+        } catch (IOException e) {
+            throw new RuntimeException(String.format("Failed to serve pack '%s'", name), e);
+        }
+    }
+
+    public List<PackInfo> getPacks() {
+        return this.packs;
+    }
+
+    @Override
+    protected @NotNull List<Listener> listeners() {
+        return List.of(
+            new PlayerJoinListener()
+        );
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/tooling/deviceFingerprinting/FingerprintData.java

@@ -0,0 +1,91 @@
+package eu.mhsl.craftattack.spawn.common.appliances.tooling.deviceFingerprinting;
+
+import eu.mhsl.craftattack.spawn.core.Main;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+
+class FingerprintData {
+    public final Player player;
+    private DeviceFingerprinting.PlayerStatus status;
+    private @Nullable Long fingerPrint;
+    private final List<DeviceFingerprinting.PackStatus> pendingPacks;
+    int packCount = Main.instance().getAppliance(DeviceFingerprinting.class).getPacks().size();
+
+    private FingerprintData(Player player) {
+        this.player = player;
+        this.status = DeviceFingerprinting.PlayerStatus.PREPARATION;
+        this.fingerPrint = null;
+        this.pendingPacks = Arrays.asList(new DeviceFingerprinting.PackStatus[this.packCount]);
+    }
+
+    public static FingerprintData create(Player player) {
+        return new FingerprintData(player);
+    }
+
+    public void setTesting() {
+        this.status = DeviceFingerprinting.PlayerStatus.TESTING;
+    }
+
+    public void updateFingerprint() {
+        long fingerPrint = 0;
+        for (int i = 0; i < this.pendingPacks.size(); i++) {
+            var status = this.pendingPacks.get(i);
+            if(status == null) return;
+            switch (status) {
+                case CACHED:
+                    fingerPrint |= 1L << i;
+                    break;
+                case UNCACHED:
+                    break;
+                default:
+                    return;
+            }
+        }
+
+        if(fingerPrint == 0) {
+            this.status = DeviceFingerprinting.PlayerStatus.NEW;
+            this.fingerPrint = this.createNewFingerprint();
+            Main.logger().info(String.format("Player %s's was marked as a new Player!", this.player.getName()));
+        } else {
+            this.status = DeviceFingerprinting.PlayerStatus.FINISHED;
+            this.fingerPrint = fingerPrint;
+        }
+
+        Main.logger().info(String.format("Player %s's fingerprint is '%s'", this.player.getName(), fingerPrint));
+    }
+
+    private long createNewFingerprint() {
+        long id = 0;
+        Random random = new Random();
+        for (int i = 0; i < this.packCount / 2; i++) {
+            while (true) {
+                int bitIndex = random.nextInt(this.packCount);
+                if ((id & (1L << bitIndex)) == 0) {
+                    id |= 1L << bitIndex;
+                    break;
+                }
+            }
+        }
+        return id;
+    }
+
+    public List<DeviceFingerprinting.PackStatus> getPendingPacks() {
+        return this.pendingPacks;
+    }
+
+    public DeviceFingerprinting.PlayerStatus getStatus() {
+        return this.status;
+    }
+
+    public @Nullable Long getFingerPrint() {
+        return this.fingerPrint;
+    }
+
+    public boolean isInTestingOrPreparation() {
+        return this.status == DeviceFingerprinting.PlayerStatus.TESTING || this.status == DeviceFingerprinting.PlayerStatus.PREPARATION;
+    }
+}

common/src/main/java/eu/mhsl/craftattack/spawn/common/appliances/tooling/deviceFingerprinting/PlayerJoinListener.java

@@ -0,0 +1,22 @@
+package eu.mhsl.craftattack.spawn.common.appliances.tooling.deviceFingerprinting;
+
+import eu.mhsl.craftattack.spawn.core.appliance.ApplianceListener;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerResourcePackStatusEvent;
+
+class PlayerJoinListener extends ApplianceListener<DeviceFingerprinting> {
+    @EventHandler
+    public void onJoin(PlayerJoinEvent event) {
+        this.getAppliance().startFingerprinting(event.getPlayer());
+    }
+
+    @EventHandler
+    public void onResourcePackEvent(PlayerResourcePackStatusEvent event) {
+        this.getAppliance().onPackUpdate(
+            event.getPlayer(),
+            event.getID(),
+            event.getStatus()
+        );
+    }
+}