Update UI to bare minimum to allow for core lib testing

qtquick/qml/pages/setup/LoginPage.qml

@@ -1,10 +1,14 @@
 import QtQuick 2.12
 import QtQuick.Controls 2.12
 
+import nl.netsoj.chris.Jellyfin 1.0
+
+import "../../components"
 import "../../.."
 
 Page {
     property string loginMessage
+    property StackView stackView: StackView.view
     header: ToolBar {
         Label {
             anchors.horizontalCenter: parent.horizontalCenter
@@ -20,11 +24,27 @@ Page {
         TextField {
             id: usernameField
             width: parent.width
+            placeholderText: qsTr("Username")
             EnterKey.type: Qt.EnterKeyNext
         }
         TextField {
             id: passwordField
             width: parent.width
+            placeholderText: qsTr("Password")
+            echoMode: TextInput.Password
+        }
+
+        Label {
+            id: loginError
+            width: parent.width
+            wrapMode: Text.WordWrap
+            text: qsTr("Invalid username/password")
+            visible: false
+        }
+
+        Button {
+            text: qsTr("Login")
+            onClicked: login()
         }
         Label {
             width: parent.width
@@ -32,4 +52,29 @@ Page {
             wrapMode: Text.WordWrap
         }
     }
+
+    BusyDialog {
+        id: busyDialog
+        anchors.centerIn: Overlay.overlay
+        title: qsTr("Logging in as %1").arg(usernameField.text)
+    }
+
+    function login() {
+        busyDialog.open()
+        ApiClient.authenticate(usernameField.text, passwordField.text, true)
+    }
+
+    Connections {
+        target: ApiClient
+        onAuthenticatedChanged: {
+            busyDialog.close()
+            if (authenticated) {
+                stackView.replace(null, Qt.resolvedUrl("../MainPage.qml"), {})
+            }
+        }
+        onAuthenticationError: {
+            busyDialog.close()
+            loginError.visible = true
+        }
+    }
 }