Filter servers (#540)

Mastodon/Scene/Onboarding/Login/MastodonLoginViewController.swift

@@ -67,7 +67,7 @@ class MastodonLoginViewController: UIViewController {
         fatalError("Wrong cell")
       }
 
-      let server = self.viewModel.serverList[indexPath.row]
+      let server = self.viewModel.filteredServers[indexPath.row]
       var configuration = cell.defaultContentConfiguration()
       configuration.text = server.domain
 
@@ -83,7 +83,7 @@ class MastodonLoginViewController: UIViewController {
         cell.backgroundColor = .systemBackground
       }
 
-      if self.viewModel.serverList.last == server {
+      if self.viewModel.filteredServers.last == server {
         cell.layer.maskedCorners = [.layerMinXMaxYCorner, .layerMaxXMaxYCorner]
         cell.layer.cornerRadius = 10
         cell.layer.masksToBounds = true
@@ -166,9 +166,7 @@ class MastodonLoginViewController: UIViewController {
   }
 
   @objc func textfieldDidChange(_ textField: UITextField) {
-    print(textField.text ?? "---")
-    //TODO: @zeitschlag filter server-list, update tableview
-
+    viewModel.filterServers(withText: textField.text)
     contentView.navigationActionView.nextButton.isEnabled = false
   }
 }
@@ -179,7 +177,7 @@ extension MastodonLoginViewController: OnboardingViewControllerAppearance { }
 //MARK: - UITableViewDelegate
 extension MastodonLoginViewController: UITableViewDelegate {
   func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
-    let server = viewModel.serverList[indexPath.row]
+    let server = viewModel.filteredServers[indexPath.row]
     viewModel.selectedServer = server
 
     contentView.searchTextField.text = server.domain
@@ -195,12 +193,12 @@ extension MastodonLoginViewController: MastodonLoginViewModelDelegate {
     var snapshot = NSDiffableDataSourceSnapshot<MastodonLoginViewSection, Mastodon.Entity.Server>()
 
     snapshot.appendSections([MastodonLoginViewSection.servers])
-    snapshot.appendItems(viewModel.serverList)
+    snapshot.appendItems(viewModel.filteredServers)
 
     dataSource?.applySnapshot(snapshot, animated: false)
 
     OperationQueue.main.addOperation {
-      let numberOfResults = viewModel.serverList.count
+      let numberOfResults = viewModel.filteredServers.count
       self.contentView.updateCorners(numberOfResults: numberOfResults)
     }
   }

Mastodon/Scene/Onboarding/Login/MastodonLoginViewModel.swift

@@ -16,8 +16,9 @@ protocol MastodonLoginViewModelDelegate: AnyObject {
 
 class MastodonLoginViewModel {
 
-  var serverList: [Mastodon.Entity.Server] = []
+  private var serverList: [Mastodon.Entity.Server] = []
   var selectedServer: Mastodon.Entity.Server?
+  var filteredServers: [Mastodon.Entity.Server] = []
 
   weak var appContext: AppContext?
   weak var delegate: MastodonLoginViewModelDelegate?
@@ -42,4 +43,17 @@ class MastodonLoginViewModel {
       self.serverList = servers
     }).store(in: &disposeBag)
   }
+
+  func filterServers(withText query: String?) {
+    guard let query else {
+      filteredServers = serverList
+      delegate?.serversUpdated(self)
+      return
+    }
+
+    filteredServers = serverList.filter { $0.domain.contains(query) }.sorted {$0.totalUsers > $1.totalUsers }
+    delegate?.serversUpdated(self)
+
+//    AuthenticationViewModel.parseDomain(from: query)
+  }
 }