添加多服务器后，可修改默认预览服务器。

fix #149

Bark/Localizable.xcstrings

@@ -19,7 +19,7 @@
         "zh-Hans" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "修改成功!"
+            "value" : "修改成功！"
           }
         }
       }
@@ -908,7 +908,7 @@
         "zh-Hans" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "删除成功"
+            "value" : "删除成功！"
           }
         }
       }
@@ -2350,6 +2350,23 @@
         }
       }
     },
+    "setAsDefaultServer" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Set As Default Server"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "设为预览服务器"
+          }
+        }
+      }
+    },
     "setSounds" : {
       "extractionState" : "manual",
       "localizations" : {
@@ -2373,6 +2390,23 @@
         }
       }
     },
+    "setSuccessfully" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Successfully set"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "设置成功！"
+          }
+        }
+      }
+    },
     "settings" : {
       "extractionState" : "manual",
       "localizations" : {

Controller/ServerListViewController.swift

@@ -13,6 +13,7 @@ import RxSwift
 import UIKit
 
 enum ServerActionType {
+    case select
     case copy
     case reset(key: String?)
     case delete
@@ -21,9 +22,10 @@ enum ServerActionType {
 func == (lhs: ServerActionType, rhs: ServerActionType) -> Bool {
     switch (lhs, rhs) {
     case (.copy, .copy),
-         (.delete, .delete):
+         (.delete, .delete),
+         (.select, .select):
         return true
-    case let (.reset(a), .reset(b)):
+    case (.reset(let a), .reset(let b)):
         return a == b
     default:
         return false
@@ -59,7 +61,7 @@ class ServerListViewController: BaseViewController<ServerListViewModel> {
             make.edges.equalToSuperview()
         }
         
-        closeButton.rx.tap.subscribe {[weak self] in
+        closeButton.rx.tap.subscribe { [weak self] in
             self?.dismiss(animated: true, completion: nil)
         } onError: { _ in
             
@@ -67,9 +69,12 @@ class ServerListViewController: BaseViewController<ServerListViewModel> {
     }
 
     override func bindViewModel() {
-
         let action = getServerAction()
 
+        // 选择 server
+        let selectServer = action.filter { $0.1 == ServerActionType.select }
+            .map { $0.0 }.asDriver(onErrorDriveWith: .empty())
+        
         // 复制 server
         let copyServer = action.filter { $0.1 == ServerActionType.copy }
             .map { $0.0 }.asDriver(onErrorDriveWith: .empty())
@@ -80,13 +85,14 @@ class ServerListViewController: BaseViewController<ServerListViewModel> {
 
         // 重置 server key
         let resetServer = action.compactMap { r -> (Server, String?)? in
-            if case let ServerActionType.reset(key) = r.1 {
+            if case ServerActionType.reset(let key) = r.1 {
                 return (r.0, key)
             }
             return nil
         }.asDriver(onErrorDriveWith: .empty())
 
         let output = viewModel.transform(input: ServerListViewModel.Input(
+            selectServer: selectServer,
             copyServer: copyServer,
             deleteServer: deleteServer,
             resetServer: resetServer
@@ -122,13 +128,12 @@ class ServerListViewController: BaseViewController<ServerListViewModel> {
     }
 
     func getServerAction() -> Driver<(Server, ServerActionType)> {
-
         return tableView.rx
             .itemSelected
             .flatMapLatest { indexPath in
                 let relay = PublishRelay<(Server, ServerActionType)>()
-                guard let viewModel: ServerListTableViewCellViewModel = try? self.tableView.rx.model(at: indexPath)  else {
-                    return relay;
+                guard let viewModel: ServerListTableViewCellViewModel = try? self.tableView.rx.model(at: indexPath) else {
+                    return relay
                 }
 
                 let alertController = UIAlertController(title: nil, message: "\(viewModel.address.value)", preferredStyle: .actionSheet)
@@ -148,6 +153,10 @@ class ServerListViewController: BaseViewController<ServerListViewModel> {
                     self.navigationController?.present(alertController, animated: true, completion: nil)
                 }))
 
+                alertController.addAction(UIAlertAction(title: NSLocalizedString("setAsDefaultServer"), style: .default, handler: { _ in
+                    relay.accept((viewModel.server, .select))
+                }))
+                
                 alertController.addAction(UIAlertAction(title: NSLocalizedString("deleteServer"), style: .destructive, handler: { _ in
 
                     let alertController = UIAlertController(title: nil, message: NSLocalizedString("confirmDeleteServer"), preferredStyle: .alert)

Controller/ServerListViewModel.swift

@@ -15,6 +15,7 @@ import SwiftyJSON
 
 class ServerListViewModel: ViewModel, ViewModelType {
     struct Input {
+        let selectServer: Driver<Server>
         let copyServer: Driver<Server>
         let deleteServer: Driver<Server>
         let resetServer: Driver<(Server, String?)>
@@ -142,8 +143,15 @@ class ServerListViewModel: ViewModel, ViewModelType {
                 )]
             }.asDriver(onErrorDriveWith: .empty())
 
+        // 选择首页预览服务器
+        let serverSelected = input.selectServer.asObservable().map { server in
+            ServerManager.shared.setCurrentServer(serverId: server.id)
+            showSnackbar.accept(NSLocalizedString("setSuccessfully"))
+            return ()
+        }
+        
         // 当前服务器有改动
-        let serverChanged = Observable.merge(serverDeleted, serverResetSuccess)
+        let serverChanged = Observable.merge(serverSelected, serverDeleted, serverResetSuccess)
             .share()
 
         serverChanged.map {