Add config for telemetry and profanity filter

Closes #20

Forge/src/main/java/com/aizistral/nochatrestrictions/config/NCRConfig.java

@@ -0,0 +1,79 @@
+package com.aizistral.nochatrestrictions.config;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Optional;
+
+import org.jetbrains.annotations.Nullable;
+
+import com.aizistral.nochatrestrictions.core.NCRCore;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import net.minecraft.client.Minecraft;
+
+public record NCRConfig(boolean allowTelemetry, boolean allowProfanityFilter) {
+    private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+    private static @Nullable NCRConfig instance = null;
+
+    private static NCRConfig getDefault() {
+	return new NCRConfig(false, false);
+    }
+
+    public static NCRConfig getInstance() {
+	if (instance == null) {
+	    instance = loadConfig("NoChatRestrictions.json");
+	}
+
+	return instance;
+    }
+
+    private static NCRConfig loadConfig(String fileName) {
+	NCRCore.LOGGER.debug("Reading config file {}...", fileName);
+	NCRConfig config = readFile(fileName).orElseGet(NCRConfig::getDefault);
+
+	NCRCore.LOGGER.info("Telemetry Allowed: {}", config.allowTelemetry());
+	NCRCore.LOGGER.info("Profanity Filter Allowed: {}", config.allowProfanityFilter());
+
+	NCRCore.LOGGER.debug("Writing config file {} back to disk...");
+	writeFile(fileName, config);
+
+	return config;
+    }
+
+    private static Optional<NCRConfig> readFile(String fileName) {
+	Path file = Minecraft.getInstance().gameDirectory.toPath().resolve("config").resolve(fileName);
+
+	if (!Files.isRegularFile(file))
+	    return Optional.empty();
+
+	try (BufferedReader reader = Files.newBufferedReader(file)) {
+	    return Optional.of(GSON.fromJson(reader, NCRConfig.class));
+	} catch (Exception ex) {
+	    NCRCore.LOGGER.fatal("Could not read config file: {}", file);
+	    NCRCore.LOGGER.fatal("This likely indicates the file is corrupted. "
+		    + "You can try deleting it to fix this problem. Full stacktrace below:");
+	    NCRCore.LOGGER.catching(ex);
+	    throw new RuntimeException("Could not read config file: " + file, ex);
+	}
+    }
+
+    private static void writeFile(String fileName, NCRConfig config) {
+	Path file = Minecraft.getInstance().gameDirectory.toPath().resolve("config").resolve(fileName);
+
+	try {
+	    Files.createDirectories(file.getParent());
+	    try (BufferedWriter writer = Files.newBufferedWriter(file)) {
+		GSON.toJson(config, writer);
+	    }
+	} catch (Exception ex) {
+	    NCRCore.LOGGER.fatal("Could not write config file: {}", file);
+	    NCRCore.LOGGER.fatal("Full stacktrace below:");
+	    NCRCore.LOGGER.catching(ex);
+	    throw new RuntimeException("Could not write config file: " + file,ex);
+	}
+    }
+
+}

Forge/src/main/java/com/aizistral/nochatrestrictions/core/WrappedUserApiService.java

@@ -4,7 +4,11 @@ import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.Executor;
 
+import org.jetbrains.annotations.Nullable;
+
+import com.aizistral.nochatrestrictions.config.NCRConfig;
 import com.google.common.collect.ImmutableSet;
+import com.mojang.authlib.exceptions.AuthenticationException;
 import com.mojang.authlib.minecraft.TelemetrySession;
 import com.mojang.authlib.minecraft.UserApiService;
 import com.mojang.authlib.minecraft.report.AbuseReportLimits;
@@ -12,30 +16,46 @@ import com.mojang.authlib.yggdrasil.request.AbuseReportRequest;
 import com.mojang.authlib.yggdrasil.response.KeyPairResponse;
 
 public class WrappedUserApiService implements UserApiService {
-    private static final UserProperties FORCED_PROPERTIES;
-
-    static {
-	ImmutableSet.Builder<UserFlag> flags = ImmutableSet.builder();
-
-	flags.add(UserFlag.CHAT_ALLOWED); // always let the player access chat
-	flags.add(UserFlag.SERVERS_ALLOWED); // always let the player open multiplayer menu
-	flags.add(UserFlag.REALMS_ALLOWED); // always let the player open Realms menu
-	// flags.add(UserFlag.TELEMETRY_ENABLED); // not adding this for obvious reasons
-	// flags.add(UserFlag.OPTIONAL_TELEMETRY_AVAILABLE); // thanks but no thanks
-	// flags.add(UserFlag.PROFANITY_FILTER_ENABLED) // not adding this one either
-
-	FORCED_PROPERTIES = new UserProperties(flags.build(), Map.of());
-    }
-
     private final UserApiService service;
+    private @Nullable UserProperties properties = null;
 
     public WrappedUserApiService(UserApiService service) {
 	this.service = service;
     }
 
     @Override
-    public UserProperties fetchProperties() {
-	return FORCED_PROPERTIES;
+    public UserProperties fetchProperties() throws AuthenticationException {
+	if (this.properties != null)
+	    return this.properties;
+
+	NCRConfig config = NCRConfig.getInstance();
+	UserProperties properties = this.service.fetchProperties();
+	ImmutableSet.Builder<UserFlag> flags = ImmutableSet.builder();
+
+	flags.add(UserFlag.CHAT_ALLOWED); // always let the player access chat
+	flags.add(UserFlag.SERVERS_ALLOWED); // always let the player open multiplayer menu
+	flags.add(UserFlag.REALMS_ALLOWED); // always let the player open Realms menu
+	flags.add(UserFlag.FRIENDS_ENABLED); // not sure if we need this, but let it be
+	// flags.add(UserFlag.CHAT_FRIENDS_ONLY); // not adding this for obvious reasons
+
+	this.addOptionalFlag(UserFlag.ACCEPT_FRIEND_INVITES, flags, properties); // I assume this is user-controller
+
+	if (config.allowTelemetry()) { // weird flex but ok
+	    this.addOptionalFlag(UserFlag.TELEMETRY_ENABLED, flags, properties);
+	    this.addOptionalFlag(UserFlag.OPTIONAL_TELEMETRY_AVAILABLE, flags, properties);
+	}
+
+	if (config.allowProfanityFilter()) { // never seen anyone actually want this, but sure
+	    this.addOptionalFlag(UserFlag.PROFANITY_FILTER_ENABLED, flags, properties);
+	}
+
+	return this.properties = new UserProperties(flags.build(), Map.of());
+    }
+
+    private void addOptionalFlag(UserFlag flag, ImmutableSet.Builder<UserFlag> builder, UserProperties properties) {
+	if (properties.flag(flag)) {
+	    builder.add(flag);
+	}
     }
 
     @Override
@@ -50,7 +70,10 @@ public class WrappedUserApiService implements UserApiService {
 
     @Override
     public TelemetrySession newTelemetrySession(Executor executor) {
-	return TelemetrySession.DISABLED;
+	if (NCRConfig.getInstance().allowTelemetry())
+	    return this.service.newTelemetrySession(executor);
+	else
+	    return TelemetrySession.DISABLED;
     }
 
     // Methods below primarily concern chat reporting. Not doing anything with them