Added customization class

src/main/java/it/cavallium/App.java

@@ -45,7 +45,7 @@ public class App extends Application {
 
 		scene = new Scene(loadFXML("primary"), 800, 600);
 		stage.setScene(scene);
-		stage.setTitle("TransferBot");
+		stage.setTitle(StaticSettings.BRANDING_NAME);
 		stage.show();
 		logService.append(Level.INFO, "Initialized");
 	}

src/main/java/it/cavallium/PrimaryController.java

@@ -1,5 +1,8 @@
 package it.cavallium;
 
+import static it.cavallium.StaticSettings.REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP;
+import static it.cavallium.StaticSettings.requiresAdminPrivilegesOnSourceSupergroup;
+
 import com.google.i18n.phonenumbers.NumberParseException;
 import com.google.i18n.phonenumbers.PhoneNumberUtil;
 import com.google.i18n.phonenumbers.PhoneNumberUtil.PhoneNumberFormat;
@@ -59,7 +62,7 @@ public class PrimaryController {
 
 		var srcItems = sourceGroupCombo.getItems();
 		srcItems.clear();
-		for (BaseChatInfo originSupergroups : App.getTransferService().getAdminSupergroups(true, false)) {
+		for (BaseChatInfo originSupergroups : App.getTransferService().getAdminSupergroups(REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP, false)) {
 			srcItems.add(originSupergroups);
 		}
 

src/main/java/it/cavallium/StaticSettings.java

@@ -0,0 +1,11 @@
+package it.cavallium;
+
+public class StaticSettings {
+
+	public static final String BRANDING_NAME = "TransferBot";
+	public static final boolean REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP = true;
+
+	public static boolean requiresAdminPrivilegesOnSourceSupergroup() {
+		return REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP;
+	}
+}

src/main/java/it/cavallium/TransferServiceImpl.java

@@ -1,6 +1,8 @@
 package it.cavallium;
 
 import static it.cavallium.PrimaryController.getUserbotPhoneNumber;
+import static it.cavallium.StaticSettings.REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP;
+import static it.cavallium.StaticSettings.requiresAdminPrivilegesOnSourceSupergroup;
 
 import com.google.i18n.phonenumbers.NumberParseException;
 import com.google.i18n.phonenumbers.PhoneNumberUtil;
@@ -17,6 +19,7 @@ import it.tdlight.jni.TdApi.AuthorizationStateReady;
 import it.tdlight.jni.TdApi.ChatMemberStatusAdministrator;
 import it.tdlight.jni.TdApi.ChatMemberStatusCreator;
 import it.tdlight.jni.TdApi.ChatMemberStatusLeft;
+import it.tdlight.jni.TdApi.ChatMemberStatusMember;
 import it.tdlight.jni.TdApi.GetMe;
 import it.tdlight.jni.TdApi.GetUserPrivacySettingRules;
 import it.tdlight.jni.TdApi.Ok;
@@ -309,7 +312,7 @@ public class TransferServiceImpl implements TransferService {
 				.then(phaseDescriptionConsumer.apply("Transfer from " + sourceGroup.getTitle() + " to " + destGroup.getTitle()))
 
 				// Check and get the set of userbots that can transfer users from group X to group Y
-				.then(phaseDescriptionConsumer.apply("Checking available userbots for removing users in the source group"))
+				.then(phaseDescriptionConsumer.apply("Checking available userbots for " + (REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP ? "removing" : "managing") + " users in the source group"))
 				.thenMany(Flux.fromIterable(sourceSupergroupClients))
 				.flatMap(client -> client
 						.send(new TdApi.GetMe())
@@ -322,19 +325,32 @@ public class TransferServiceImpl implements TransferService {
 						.flatMap(MonoUtils::orElseThrow)
 						.timeout(Duration.ofSeconds(5))
 						.filter(sourceGroupFullInfo -> {
+							if (requiresAdminPrivilegesOnSourceSupergroup()) {
 								if (sourceGroupFullInfo.status.getConstructor() == ChatMemberStatusAdministrator.CONSTRUCTOR) {
 									var statusAdmin = (ChatMemberStatusAdministrator) sourceGroupFullInfo.status;
 									if (statusAdmin.canRestrictMembers) {
 										return true;
 									} else {
 										App.getLogService().append(Level.WARN, "Userbot " + client + " failed: Can't restrict members of group " + sourceGroup.getTitle());
+										return false;
 									}
 								} else if (sourceGroupFullInfo.status.getConstructor() == ChatMemberStatusCreator.CONSTRUCTOR) {
 									return true;
 								} else {
 									App.getLogService().append(Level.WARN, "Userbot " + client + " failed: Can't administer group " + sourceGroup.getTitle());
-							}
 									return false;
+								}
+							} else {
+								switch (sourceGroupFullInfo.status.getConstructor()) {
+									case ChatMemberStatusAdministrator.CONSTRUCTOR:
+									case ChatMemberStatusCreator.CONSTRUCTOR:
+									case ChatMemberStatusMember.CONSTRUCTOR:
+										return true;
+									default:
+										App.getLogService().append(Level.WARN, "Userbot " + client + " failed: Can't access group " + sourceGroup.getTitle() + " (probably restricted, left or banned)");
+										return false;
+								}
+							}
 						})
 						.map(_v -> client)
 						.onErrorResume(e -> {
@@ -537,6 +553,8 @@ public class TransferServiceImpl implements TransferService {
 										});
 							})
 							.<User>flatMap(user -> {
+								if (REMOVE_MEMBERS_FROM_SOURCE_SUPERGROUP) {
+									// Remove the user from the source supergroup
 									return client.<Ok>send(new TdApi.SetChatMemberStatus(sourceGroup.getSupergroupId(), user.id, new ChatMemberStatusLeft()))
 											.flatMap(result -> {
 												if (result.failed()) {
@@ -556,6 +574,10 @@ public class TransferServiceImpl implements TransferService {
 												transferredSuccessfullyUsersStats.incrementAndGet();
 												return userStatusConsumer.apply(new UserStatus(getName(user), user.id, UserStatusType.DONE, "")).then(Mono.empty()).thenReturn(user);
 											});
+								} else {
+									// Don't remove the user from the source supergroup
+									return Mono.just(user);
+								}
 							})
 							.delayElements(App.getSettingsService().getDelayBetweenAdds())
 							.collect(Collectors.toSet())