Unify forms, add to/remove from playlist on all platforms, UI improvements

tvOS/AccountSelectionView.swift

@@ -0,0 +1,47 @@
+import Defaults
+import Foundation
+import SwiftUI
+
+struct AccountSelectionView: View {
+    @EnvironmentObject<InstancesModel> private var instancesModel
+    @EnvironmentObject<InvidiousAPI> private var api
+
+    @Default(.accounts) private var accounts
+    @Default(.instances) private var instances
+
+    var body: some View {
+        Section(header: Text("Current Account")) {
+            Button(api.account?.name ?? "Not selected") {
+                if let account = nextAccount {
+                    api.setAccount(account)
+                }
+            }
+            .disabled(nextAccount == nil)
+            .contextMenu {
+                ForEach(instances) { instance in
+                    Button(accountButtonTitle(instance: instance, account: instance.anonymousAccount)) {
+                        api.setAccount(instance.anonymousAccount)
+                    }
+
+                    ForEach(instancesModel.accounts(instance.id)) { account in
+                        Button(accountButtonTitle(instance: instance, account: account)) {
+                            api.setAccount(account)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private var nextAccount: Instance.Account? {
+        guard api.account != nil else {
+            return accounts.first
+        }
+
+        return accounts.next(after: api.account!)
+    }
+
+    func accountButtonTitle(instance: Instance, account: Instance.Account) -> String {
+        instances.count > 1 ? "\(account.description) — \(instance.shortDescription)" : account.description
+    }
+}