LuckPerms permission provider for offline support

fabric-1.18.2/build.gradle

@@ -18,6 +18,7 @@ configurations {
 }
 
 repositories {
+    mavenCentral()
     maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
 }
 
@@ -32,6 +33,7 @@ dependencies {
     shadow project(path: ':DynmapCore', configuration: 'shadow')
 
     modCompileOnly "me.lucko:fabric-permissions-api:0.1-SNAPSHOT"
+    compileOnly 'net.luckperms:api:5.4'
 }
 
 processResources {

fabric-1.18.2/src/main/java/org/dynmap/fabric_1_18_2/DynmapPlugin.java

@@ -49,10 +49,7 @@ import org.dynmap.fabric_1_18_2.event.CustomServerChunkEvents;
 import org.dynmap.fabric_1_18_2.event.CustomServerLifecycleEvents;
 import org.dynmap.fabric_1_18_2.event.PlayerEvents;
 import org.dynmap.fabric_1_18_2.mixin.BiomeEffectsAccessor;
-import org.dynmap.fabric_1_18_2.permissions.FabricPermissions;
-import org.dynmap.fabric_1_18_2.permissions.FilePermissions;
-import org.dynmap.fabric_1_18_2.permissions.OpPermissions;
-import org.dynmap.fabric_1_18_2.permissions.PermissionProvider;
+import org.dynmap.fabric_1_18_2.permissions.*;
 import org.dynmap.permissions.PermissionsHandler;
 import org.dynmap.renderer.DynmapBlockState;
 
@@ -405,7 +402,11 @@ public class DynmapPlugin {
         /* Set up player login/quit event handler */
         registerPlayerLoginListener();
 
-        if (FabricLoader.getInstance().isModLoaded("fabric-permissions-api-v0")) {
+        if (FabricLoader.getInstance().isModLoaded("luckperms")) {
+            Log.info("Using luckperms for access control");
+            permissions = new LuckPermissions();
+        }
+        else if (FabricLoader.getInstance().isModLoaded("fabric-permissions-api-v0")) {
             Log.info("Using fabric-permissions-api for access control");
             permissions = new FabricPermissions();
         } else {

fabric-1.18.2/src/main/java/org/dynmap/fabric_1_18_2/permissions/FabricPermissions.java

@@ -2,16 +2,17 @@ package org.dynmap.fabric_1_18_2.permissions;
 
 import me.lucko.fabric.api.permissions.v0.Permissions;
 import net.minecraft.entity.player.PlayerEntity;
-import org.dynmap.DynmapCore;
 import org.dynmap.Log;
-import org.dynmap.fabric_1_18_2.DynmapMod;
 import org.dynmap.fabric_1_18_2.DynmapPlugin;
+import org.dynmap.json.simple.parser.JSONParser;
 
 import java.util.Set;
 import java.util.stream.Collectors;
 
 public class FabricPermissions implements PermissionProvider {
 
+    private final JSONParser parser = new JSONParser();
+
     private String permissionKey(String perm) {
         return "dynmap." + perm;
     }

fabric-1.18.2/src/main/java/org/dynmap/fabric_1_18_2/permissions/LuckPermissions.java

@@ -0,0 +1,105 @@
+package org.dynmap.fabric_1_18_2.permissions;
+
+import me.lucko.fabric.api.permissions.v0.Permissions;
+import net.luckperms.api.LuckPerms;
+import net.luckperms.api.LuckPermsProvider;
+import net.luckperms.api.cacheddata.CachedPermissionData;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.util.Tristate;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.server.MinecraftServer;
+import org.dynmap.Log;
+import org.dynmap.fabric_1_18_2.DynmapPlugin;
+import org.dynmap.json.simple.JSONArray;
+import org.dynmap.json.simple.JSONObject;
+import org.dynmap.json.simple.parser.JSONParser;
+import org.dynmap.json.simple.parser.ParseException;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+public class LuckPermissions implements PermissionProvider {
+
+    private final JSONParser parser = new JSONParser();
+    private LuckPerms api = null;
+
+    private Optional<LuckPerms> getApi() {
+        if (api != null) return Optional.of(api);
+        try {
+            api = LuckPermsProvider.get();
+            return Optional.of(api);
+        } catch (Exception ex) {
+            Log.warning("Trying to access LuckPerms before it has loaded");
+            return Optional.empty();
+        }
+    }
+
+    private Optional<UUID> cachedUUID(String username) {
+        try {
+            BufferedReader reader = new BufferedReader(new FileReader(MinecraftServer.USER_CACHE_FILE));
+            JSONArray cache = (JSONArray) parser.parse(reader);
+            for (Object it : cache) {
+                JSONObject user = (JSONObject) it;
+                if (user.get("name").toString().equalsIgnoreCase(username)) {
+                    String uuid = user.get("uuid").toString();
+                    Log.info("Found cached UUID for " + username + ": " + uuid);
+                    return Optional.of(UUID.fromString(uuid));
+                }
+            }
+
+            reader.close();
+        } catch (IOException | ParseException ex) {
+            Log.warning("Unable to read usercache.json");
+        }
+
+        return Optional.empty();
+    }
+
+    private String permissionKey(String perm) {
+        return "dynmap." + perm;
+    }
+
+    @Override
+    public Set<String> hasOfflinePermissions(String player, Set<String> perms) {
+        Log.info("Requesting offline permissions: " + String.join(",", perms) + " for " + player);
+        return perms.stream()
+                .filter(perm -> hasOfflinePermission(player, perm))
+                .collect(Collectors.toSet());
+    }
+
+    @Override
+    public boolean hasOfflinePermission(String player, String perm) {
+        Log.info("Requesting offline permission: " + perm + " for " + player);
+        if (DynmapPlugin.plugin.isOp(player.toLowerCase())) return true;
+        Optional<LuckPerms> api = getApi();
+        Optional<UUID> uuid = cachedUUID(player);
+        if (!uuid.isPresent() || !api.isPresent()) return false;
+        User user = api.get().getUserManager().loadUser(uuid.get()).join();
+        CachedPermissionData permissions = user.getCachedData().getPermissionData();
+        Tristate state = permissions.checkPermission(permissionKey(perm));
+        return state.asBoolean();
+    }
+
+    @Override
+    public boolean has(PlayerEntity player, String permission) {
+        Log.info("Requesting privilege: " + permission);
+        return player != null && Permissions.check(player, permissionKey(permission));
+    }
+
+    @Override
+    public boolean hasPermissionNode(PlayerEntity player, String permission) {
+        if (player != null) {
+            String name = player.getName().getString().toLowerCase();
+            Log.info("Requesting permission node: " + permission + " for " + name);
+            return DynmapPlugin.plugin.isOp(name);
+        }
+        Log.info("Requesting permission node: " + permission);
+        return false;
+    }
+
+}