Added reusable loading, empty and error UI components with testing

app/src/main/AndroidManifest.xml

@@ -69,6 +69,9 @@
         <activity
             android:name=".view.general.Homepage4nurse"
             android:exported="false" />
+        <activity
+            android:name=".view.general.Homepage4doctor"
+            android:exported="false" />
         <activity
             android:name=".view.general.TaskDetailActivity"
             android:exported="false" />

app/src/main/java/deakin/gopher/guardian/WelcomeActivity.kt

@@ -1,11 +1,67 @@
 package deakin.gopher.guardian
 
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.view.View
+import android.widget.Button
+import deakin.gopher.guardian.components.EmptyView
+import deakin.gopher.guardian.components.ErrorView
+import deakin.gopher.guardian.components.LoadingView
 import androidx.appcompat.app.AppCompatActivity
 
 class WelcomeActivity : AppCompatActivity() {
+
+    private lateinit var loadingView: LoadingView
+    private lateinit var emptyView: EmptyView
+    private lateinit var errorView: ErrorView
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_welcome) // This links to your activity_welcome.xml
+
+        loadingView = findViewById(R.id.loadingView)
+        emptyView = findViewById(R.id.emptyView)
+        errorView = findViewById(R.id.errorView)
+
+        val btnShowLoading = findViewById<Button>(R.id.btnShowLoading)
+        val btnShowEmpty = findViewById<Button>(R.id.btnShowEmpty)
+        val btnShowError = findViewById<Button>(R.id.btnShowError)
+        val btnHideAll = findViewById<Button>(R.id.btnHideAll)
+
+        btnShowLoading.setOnClickListener {
+            hideAllStateViews()
+            loadingView.show()
+        }
+
+        btnShowEmpty.setOnClickListener {
+            hideAllStateViews()
+            emptyView.show("No records found")
+        }
+
+        btnShowError.setOnClickListener {
+            hideAllStateViews()
+            errorView.show("Failed to load data")
+        }
+
+        btnHideAll.setOnClickListener {
+            hideAllStateViews()
+        }
+
+        errorView.setOnRetryClick {
+            hideAllStateViews()
+            loadingView.show()
+
+            loadingView.postDelayed({
+                loadingView.hide()
+                emptyView.show("Retry completed, but no data available")
+            }, 2000)
+        }
+    }
+
+    private fun hideAllStateViews() {
+        loadingView.hide()
+        emptyView.hide()
+        errorView.hide()
     }
-}
+}

app/src/main/java/deakin/gopher/guardian/components/EmptyView.kt

@@ -0,0 +1,36 @@
+package deakin.gopher.guardian.components
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.FrameLayout
+import android.widget.TextView
+import deakin.gopher.guardian.R
+
+class EmptyView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : FrameLayout(context, attrs) {
+
+    private val message: TextView
+
+    init {
+        LayoutInflater.from(context).inflate(R.layout.view_empty, this, true)
+        visibility = GONE
+        message = findViewById(R.id.emptyMessage)
+    }
+
+    fun setMessage(text: String) {
+        message.text = text
+    }
+
+    fun show(messageText: String? = null) {
+        if (messageText != null) {
+            message.text = messageText
+        }
+        visibility = VISIBLE
+    }
+
+    fun hide() {
+        visibility = GONE
+    }
+}

app/src/main/java/deakin/gopher/guardian/components/ErrorView.kt

@@ -0,0 +1,44 @@
+package deakin.gopher.guardian.components
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.Button
+import android.widget.FrameLayout
+import android.widget.TextView
+import deakin.gopher.guardian.R
+
+class ErrorView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : FrameLayout(context, attrs) {
+
+    private val message: TextView
+    private val retryButton: Button
+
+    init {
+        LayoutInflater.from(context).inflate(R.layout.view_error, this, true)
+        visibility = GONE
+
+        message = findViewById(R.id.errorMessage)
+        retryButton = findViewById(R.id.retryButton)
+    }
+
+    fun setMessage(text: String) {
+        message.text = text
+    }
+
+    fun setOnRetryClick(listener: () -> Unit) {
+        retryButton.setOnClickListener { listener() }
+    }
+
+    fun show(messageText: String? = null) {
+        if (messageText != null) {
+            message.text = messageText
+        }
+        visibility = VISIBLE
+    }
+
+    fun hide() {
+        visibility = GONE
+    }
+}

app/src/main/java/deakin/gopher/guardian/components/LoadingView.kt

@@ -0,0 +1,25 @@
+package deakin.gopher.guardian.components
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.FrameLayout
+import deakin.gopher.guardian.R
+
+class LoadingView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : FrameLayout(context, attrs) {
+
+    init {
+        LayoutInflater.from(context).inflate(R.layout.view_loading, this, true)
+        visibility = GONE
+    }
+
+    fun show() {
+        visibility = VISIBLE
+    }
+
+    fun hide() {
+        visibility = GONE
+    }
+}

app/src/main/java/deakin/gopher/guardian/model/login/Role.kt

@@ -16,16 +16,22 @@ sealed class Role(val name: String) : Serializable {
         private fun readResolve(): Any = Nurse
     }
 
+    data object Doctor : Role("doctor") {
+        private fun readResolve(): Any = Doctor
+    }
+
     companion object {
         private const val CARETAKER_ROLE = "caretaker"
         private const val ADMIN_ROLE = "admin"
         private const val NURSE_ROLE = "nurse"
+        private const val DOCTOR_ROLE = "doctor"
 
         fun create(name: String): Role {
             return when (name.lowercase()) {
                 CARETAKER_ROLE.lowercase() -> Caretaker
                 ADMIN_ROLE.lowercase() -> Admin
                 NURSE_ROLE.lowercase() -> Nurse
+                DOCTOR_ROLE.lowercase() -> Doctor
                 else -> throw IllegalArgumentException("Unknown role: $name")
             }
         }

app/src/main/java/deakin/gopher/guardian/services/NavigationService.kt

@@ -5,6 +5,7 @@ import android.content.Intent
 import deakin.gopher.guardian.model.login.Role
 import deakin.gopher.guardian.view.general.Homepage4admin
 import deakin.gopher.guardian.view.general.Homepage4caretaker
+import deakin.gopher.guardian.view.general.Homepage4doctor
 import deakin.gopher.guardian.view.general.Homepage4nurse
 import deakin.gopher.guardian.view.general.LoginActivity
 import deakin.gopher.guardian.view.general.PatientListActivity
@@ -43,6 +44,15 @@ class NavigationService(val activity: Activity) {
                     ),
                 )
             }
+
+            Role.Doctor -> {
+                activity.startActivity(
+                    Intent(
+                        activity.applicationContext,
+                        Homepage4doctor::class.java,
+                    ),
+                )
+            }
         }
     }
 

app/src/main/java/deakin/gopher/guardian/view/general/Homepage4doctor.kt

@@ -0,0 +1,20 @@
+package deakin.gopher.guardian.view.general
+
+import android.os.Bundle
+import android.widget.Button
+import androidx.appcompat.app.AppCompatActivity
+import deakin.gopher.guardian.R
+import deakin.gopher.guardian.services.EmailPasswordAuthService
+
+class Homepage4doctor : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_homepage4doctor)
+
+        val signOutButton: Button = findViewById(R.id.signOutButton_doctor)
+        signOutButton.setOnClickListener {
+            EmailPasswordAuthService.signOut(this)
+            finish()
+        }
+    }
+}

app/src/main/java/deakin/gopher/guardian/view/general/MainActivity.kt

@@ -47,6 +47,9 @@ class MainActivity : BaseActivity() {
                 Role.Nurse -> {
                     startActivity(Intent(this@MainActivity, Homepage4nurse::class.java))
                 }
+                Role.Doctor -> {
+                    startActivity(Intent(this@MainActivity, Homepage4doctor::class.java))
+                }
             }
         }
     }

app/src/main/res/layout/activity_homepage4doctor.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/welcomeDoctorText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Welcome Doctor"
+        android:textSize="24sp"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/signOutButton_doctor"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="Sign Out"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/welcomeDoctorText" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>