load authlib-injector server from external file

HMCL/src/main/java/org/jackhuang/hmcl/Launcher.java

@@ -20,6 +20,9 @@ package org.jackhuang.hmcl;
 import javafx.application.Application;
 import javafx.application.Platform;
 import javafx.stage.Stage;
+import org.jackhuang.hmcl.auth.authlibinjector.AuthlibInjectorServer;
+import org.jackhuang.hmcl.setting.Accounts;
+import org.jackhuang.hmcl.setting.AuthlibInjectorServers;
 import org.jackhuang.hmcl.setting.ConfigHolder;
 import org.jackhuang.hmcl.task.Schedulers;
 import org.jackhuang.hmcl.task.TaskExecutor;
@@ -41,6 +44,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
+import static org.jackhuang.hmcl.setting.ConfigHolder.config;
 import static org.jackhuang.hmcl.ui.FXUtils.runInFX;
 import static org.jackhuang.hmcl.util.Logging.LOG;
 import static org.jackhuang.hmcl.util.i18n.I18n.i18n;
@@ -54,6 +58,14 @@ public final class Launcher extends Application {
         try {
             try {
                 ConfigHolder.init();
+                AuthlibInjectorServers.init();
+
+                if (ConfigHolder.isNewlyCreated() && !AuthlibInjectorServers.getConfigInstance().getUrls().isEmpty()) {
+                    config().setPreferredLoginType(Accounts.getLoginType(Accounts.FACTORY_AUTHLIB_INJECTOR));
+                    AuthlibInjectorServers.getConfigInstance().getUrls().stream()
+                            .map(AuthlibInjectorServer::new)
+                            .forEach(config().getAuthlibInjectorServers()::add);
+                }
             } catch (IOException e) {
                 Main.showErrorAndExit(i18n("fatal.config_loading_failure", Paths.get("").toAbsolutePath().normalize()));
             }

HMCL/src/main/java/org/jackhuang/hmcl/setting/AuthlibInjectorServers.java

@@ -0,0 +1,78 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2019  huangyuhui <huanghongxun2008@126.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.jackhuang.hmcl.setting;
+
+import com.google.gson.JsonParseException;
+import org.jackhuang.hmcl.util.gson.JsonUtils;
+import org.jackhuang.hmcl.util.gson.Validation;
+import org.jackhuang.hmcl.util.io.FileUtils;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.List;
+import java.util.logging.Level;
+
+import static org.jackhuang.hmcl.util.Logging.LOG;
+
+public class AuthlibInjectorServers implements Validation {
+
+    public static final String CONFIG_FILENAME = "authlib-injectors.json";
+
+    private final List<String> urls;
+
+    public AuthlibInjectorServers(List<String> urls) {
+        this.urls = urls;
+    }
+
+    public List<String> getUrls() {
+        return urls;
+    }
+
+    @Override
+    public void validate() throws JsonParseException {
+        if (urls == null)
+            throw new JsonParseException("authlib-injectors.json -> urls cannot be null");
+    }
+
+    private static final Path configLocation = Paths.get(CONFIG_FILENAME);
+    private static AuthlibInjectorServers configInstance;
+
+    public synchronized static void init() {
+        if (configInstance != null) {
+            throw new IllegalStateException("AuthlibInjectorServers is already loaded");
+        }
+
+        configInstance = new AuthlibInjectorServers(Collections.emptyList());
+
+        if (Files.exists(configLocation)) {
+            try {
+                String content = FileUtils.readText(configLocation);
+                configInstance = JsonUtils.GSON.fromJson(content, AuthlibInjectorServers.class);
+            } catch (IOException | JsonParseException e) {
+                LOG.log(Level.WARNING, "Malformed authlib-injectors.json", e);
+            }
+        }
+    }
+
+    public static AuthlibInjectorServers getConfigInstance() {
+        return configInstance;
+    }
+}

HMCL/src/main/java/org/jackhuang/hmcl/setting/ConfigHolder.java

@@ -52,6 +52,10 @@ public final class ConfigHolder {
         return configInstance;
     }
 
+    public static boolean isNewlyCreated() {
+        return newlyCreated;
+    }
+
     public synchronized static void init() throws IOException {
         if (configInstance != null) {
             throw new IllegalStateException("Configuration is already loaded");