feat(InstanceViewModel): 自动给用户输入的实例地址加上 https://

自动给用户输入的实例地址加上 https://

Signed-off-by: Ching <loooching@gmail.com>

DUDUJI/ViewModels/InstanceViewModel.swift

@@ -11,11 +11,20 @@ class InstanceViewModel: ObservableObject {
     @Published var instance: Instance = .defaultInstance()
     @Published var isLoading: Bool = false
 
+    func addPrefixIfNecessary(_ str: String) -> String {
+        if str.hasPrefix("http://") || str.hasPrefix("https://") {
+            return str
+        } else {
+            return "https://" + str
+        }
+    }
+
     func getInstance(from url: String) async {
         DispatchQueue.main.async {
             self.isLoading = true
         }
         do {
+            let url = addPrefixIfNecessary(url)
             let newInstance = try await Instance.instanceFromURL(url: url)
             DispatchQueue.main.async {
                 self.instance = newInstance