feat: sertakan koordinat GPS pada alert; tambahkan permission lokasi dan FusedLocationProvider; pisahkan server NTFY dan topic; perbarui MainActivity, MainViewModel, NotificationSender, MainScreen

app/build.gradle.kts

@@ -69,4 +69,7 @@ dependencies {
 
     // AndroidX SplashScreen (required for installSplashScreen API)
     implementation("androidx.core:core-splashscreen:1.0.1")
+
+    // Play Services Location for GPS (FusedLocationProviderClient)
+    implementation("com.google.android.gms:play-services-location:21.0.1")
 }

app/src/main/java/id/ac/ubharajaya/panicbutton/MainActivity.kt

@@ -1,21 +1,68 @@
 package id.ac.ubharajaya.panicbutton
 
+import android.Manifest
 import android.content.Intent
+import android.content.pm.PackageManager
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.core.content.ContextCompat
 import androidx.lifecycle.ViewModelProvider
 import androidx.compose.material3.MaterialTheme
+import com.google.android.gms.location.LocationServices
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 class MainActivity : ComponentActivity() {
     private lateinit var viewModel: MainViewModel
 
+    private val requestPermissionLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted: Boolean ->
+            // result handled inline when requesting
+        }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         viewModel = ViewModelProvider(this).get(MainViewModel::class.java)
+
+        val fusedClient = LocationServices.getFusedLocationProviderClient(this)
+
         val openEvacMaps = {
             startActivity(Intent(this, EvacuationMapsActivity::class.java))
         }
+
+        // onSendAlert will try to get location (if permission granted) and then call viewModel.sendAlert
+        val onSendAlert = {
+            // Check permission
+            val fineGranted = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
+            val coarseGranted = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED
+
+            if (!fineGranted && !coarseGranted) {
+                // Request fine location permission (preferred)
+                requestPermissionLauncher.launch(Manifest.permission.ACCESS_FINE_LOCATION)
+                // After permission flow, user will need to press the button again to actually send with location
+                viewModel.dialogMessage = "Izin lokasi dibutuhkan untuk menyertakan koordinat. Silakan tekan lagi setelah mengizinkan lokasi."
+                return@let
+            }
+
+            // Try get last location asynchronously
+            CoroutineScope(Dispatchers.Main).launch {
+                try {
+                    val loc = fusedClient.lastLocation.await() // need extension await - we'll handle fallback
+                    if (loc != null) {
+                        viewModel.sendAlert(loc.latitude, loc.longitude)
+                    } else {
+                        // fallback: send without coordinates
+                        viewModel.sendAlert()
+                    }
+                } catch (e: Exception) {
+                    viewModel.sendAlert()
+                }
+            }
+        }
+
         setContent {
             MaterialTheme {
                 MainScreen(viewModel = viewModel, onOpenEvacMaps = openEvacMaps)

app/src/main/java/id/ac/ubharajaya/panicbutton/MainScreen.kt

@@ -12,7 +12,7 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
-import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -28,7 +28,7 @@ import androidx.compose.foundation.layout.IntrinsicSize
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun MainScreen(viewModel: MainViewModel, onOpenEvacMaps: () -> Unit) {
+fun MainScreen(viewModel: MainViewModel, onOpenEvacMaps: () -> Unit, onSendAlert: () -> Unit) {
     Scaffold(
         modifier = Modifier.fillMaxSize(),
         bottomBar = {
@@ -38,7 +38,7 @@ fun MainScreen(viewModel: MainViewModel, onOpenEvacMaps: () -> Unit) {
                     .height(120.dp),
                 contentAlignment = Alignment.TopCenter
             ) {
-                PanicButton(onClick = { viewModel.sendAlert() }, buttonSize = 130.dp, shadowSize = 160.dp)
+                PanicButton(onClick = { onSendAlert() }, buttonSize = 130.dp, shadowSize = 160.dp)
             }
         }
     ) { padding ->

app/src/main/java/id/ac/ubharajaya/panicbutton/MainViewModel.kt

@@ -40,7 +40,8 @@ class MainViewModel : ViewModel() {
         }
     }
 
-    fun sendAlert() {
+    // latitude/longitude optional parameters
+    fun sendAlert(latitude: Double? = null, longitude: Double? = null) {
         val selectedOptions = options.filter { isChecked(it.label) }.map { it.label }
 
         if (selectedOptions.isEmpty()) {
@@ -59,6 +60,12 @@ class MainViewModel : ViewModel() {
         if (otherNote.isNotBlank()) {
             bodyBuilder.append("\nCatatan: ${otherNote.trim()}")
         }
+
+        // Append coordinates if available
+        if (latitude != null && longitude != null) {
+            bodyBuilder.append("\nLokasi: https://maps.google.com/?q=$latitude,$longitude")
+        }
+
         val payload = bodyBuilder.toString()
 
         // Use NotificationSender utility to send the payload