added the network check

app/src/main/java/in/sminnovations/attendanceapp/screens/home/ui/componets/AttendanceScreenContent.kt

@@ -0,0 +1,197 @@
+package `in`.sminnovations.attendanceapp.screens.home.ui.componets
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.KeyboardArrowUp
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedCard
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.PermissionState
+import com.google.accompanist.permissions.isGranted
+
+import `in`.sminnovations.attendanceapp.screens.home.viewModel.AttendanceUiState
+
+@OptIn(ExperimentalPermissionsApi::class)
+@Composable
+internal fun AttendanceScreenContent(
+    uiState: AttendanceUiState,
+    cameraPermissionState: PermissionState,
+    onScannerToggle: () -> Unit,
+    onQrCodeScanned: (String) -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Box(modifier = modifier.fillMaxSize()) {
+        when {
+            !cameraPermissionState.status.isGranted -> {
+                RequestPermissionsContent(cameraPermissionState)
+            }
+            uiState.isScanning -> {
+                ScannerContent(
+                    onQrCodeScanned = onQrCodeScanned,
+                    onClose = onScannerToggle
+                )
+            }
+            uiState.errorMessage != null -> {
+                ErrorContent(
+                    errorMessage = uiState.errorMessage,
+                    userName = uiState.userName,
+                    checkedOutTime = uiState.checkedOutTime
+                )
+            }
+            uiState.isCheckedIn -> {
+                AttendanceStatusCard(
+                    title = "Checked In as",
+                    userName = uiState.userName
+                )
+            }
+            uiState.isCheckedOut -> {
+                AttendanceStatusCard(
+                    title = "Checked Out as",
+                    userName = uiState.userName
+                )
+            }
+        }
+
+        if (uiState.isLoading) {
+            LoadingOverlay()
+        }
+
+        ScannerToggleButton(
+            isScanning = uiState.isScanning,
+            onClick = onScannerToggle,
+            modifier = Modifier.align(Alignment.BottomCenter)
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun ScannerToggleButton(
+    isScanning: Boolean,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    OutlinedCard(
+        onClick = onClick,
+        colors = CardDefaults.cardColors(
+            containerColor = MaterialTheme.colorScheme.primary
+        ),
+        modifier = modifier
+            .fillMaxWidth()
+            .padding(16.dp)
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(vertical = 16.dp),
+            horizontalArrangement = Arrangement.Center,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Icon(
+                imageVector = if (isScanning) Icons.Default.Close else Icons.Default.KeyboardArrowUp,
+                contentDescription = null,
+                modifier = Modifier.padding(end = 8.dp)
+            )
+            Text(
+                text = if (isScanning) "Close Scanner" else "Open Scanner",
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold
+            )
+        }
+    }
+}
+
+
+@Composable
+private fun LoadingOverlay() {
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(Color.Black.copy(alpha = 0.3f)),
+        contentAlignment = Alignment.Center
+    ) {
+        CircularProgressIndicator(
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.size(48.dp)
+        )
+    }
+}
+
+
+
+@Composable
+private fun AttendanceStatusCard(
+    title: String,
+    userName: String?
+) {
+    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+        OutlinedCard {
+            Text(
+                text = title,
+                letterSpacing = 2.sp,
+                lineHeight = 40.sp,
+                fontSize = 30.sp,
+                color = Color.Green,
+                fontWeight = FontWeight.Bold,
+                modifier = Modifier.padding(10.dp, 5.dp)
+            )
+        }
+        Spacer(modifier = Modifier.height(10.dp))
+        Text(
+            text = userName ?: "",
+            letterSpacing = 2.sp,
+            lineHeight = 40.sp,
+            fontSize = 30.sp,
+            fontWeight = FontWeight.Bold
+        )
+    }
+}
+
+
+@Composable
+private fun ScannerContent(
+    onQrCodeScanned: (String) -> Unit,
+    onClose: () -> Unit
+) {
+    Box(modifier = Modifier.fillMaxSize()) {
+        QRCodeScannerScreen(onQrCodeScanned)
+        IconButton(
+            onClick = onClose,
+            modifier = Modifier
+                .align(Alignment.TopStart)
+                .padding(16.dp)
+        ) {
+            Icon(Icons.Default.ArrowBack, contentDescription = "Close Scanner")
+        }
+    }
+
+    BackHandler { onClose() }
+}
+
+

app/src/main/java/in/sminnovations/attendanceapp/screens/home/ui/home.kt

@@ -32,23 +32,20 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.text.SpanStyle
-import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.google.accompanist.permissions.ExperimentalPermissionsApi
 import com.google.accompanist.permissions.PermissionState
-import com.google.accompanist.permissions.isGranted
 import com.google.accompanist.permissions.rememberPermissionState
+import `in`.sminnovations.attendanceapp.screens.home.ui.componets.AttendanceScreenContent
+import `in`.sminnovations.attendanceapp.screens.home.ui.componets.NetworkErrorDialog
 import `in`.sminnovations.attendanceapp.screens.home.ui.componets.QRCodeScannerScreen
-import `in`.sminnovations.attendanceapp.screens.home.viewModel.AttendanceUiState
 import `in`.sminnovations.attendanceapp.screens.home.viewModel.HomeViewModel
 
-@OptIn(ExperimentalPermissionsApi::class, ExperimentalMaterial3Api::class)
+@OptIn(ExperimentalPermissionsApi::class)
 @Composable
 fun HomeScreen(
     viewModel: HomeViewModel = hiltViewModel(),
@@ -56,287 +53,20 @@ fun HomeScreen(
 ) {
     val uiState by viewModel.uiState.collectAsState()
     val cameraPermissionState = rememberPermissionState(Manifest.permission.CAMERA)
-
-    AttendanceScreenContent(
-        uiState = uiState,
-        cameraPermissionState = cameraPermissionState,
-        onScannerToggle = { if (uiState.isScanning) viewModel.stopScanning() else viewModel.startScanning() },
-        onQrCodeScanned = viewModel::setQRCodeValue,
-        modifier = modifier
+    NetworkErrorDialog(
+        showDialog = !uiState.isConnected,
+        onRetry = {
+            viewModel.reStartMonitoring()
+        }
     )
-}
-
-
-@OptIn(ExperimentalPermissionsApi::class)
-@Composable
-private fun AttendanceScreenContent(
-    uiState: AttendanceUiState,
-    cameraPermissionState: PermissionState,
-    onScannerToggle: () -> Unit,
-    onQrCodeScanned: (String) -> Unit,
-    modifier: Modifier = Modifier
-) {
-    Box(modifier = modifier.fillMaxSize()) {
-        when {
-            !cameraPermissionState.status.isGranted -> {
-                RequestPermissionsContent(cameraPermissionState)
-            }
-            uiState.isScanning -> {
-                ScannerContent(
-                    onQrCodeScanned = onQrCodeScanned,
-                    onClose = onScannerToggle
-                )
-            }
-            uiState.errorMessage != null -> {
-                ErrorContent(
-                    errorMessage = uiState.errorMessage,
-                    userName = uiState.userName,
-                    checkedOutTime = uiState.checkedOutTime
-                )
-            }
-            uiState.isCheckedIn -> {
-                AttendanceStatusCard(
-                    title = "Checked In as",
-                    userName = uiState.userName
-                )
-            }
-            uiState.isCheckedOut -> {
-                AttendanceStatusCard(
-                    title = "Checked Out as",
-                    userName = uiState.userName
-                )
-            }
-        }
-
-        // Loading overlay
-        if (uiState.isLoading) {
-            LoadingOverlay()
-        }
-
-        // Bottom scanner toggle button
-        ScannerToggleButton(
-            isScanning = uiState.isScanning,
-            onClick = onScannerToggle,
-            modifier = Modifier.align(Alignment.BottomCenter)
+    if (uiState.isConnected){
+        AttendanceScreenContent(
+            uiState = uiState,
+            cameraPermissionState = cameraPermissionState,
+            onScannerToggle = { if (uiState.isScanning) viewModel.stopScanning() else viewModel.startScanning() },
+            onQrCodeScanned = viewModel::setQRCodeValue,
+            modifier = modifier
         )
-    }
 }
-@OptIn(ExperimentalPermissionsApi::class)
-@Composable
-private fun RequestPermissionsContent(cameraPermissionState: PermissionState) {
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .padding(16.dp),
-        horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
-    ) {
-        Text(
-            text = "Camera Permission Required",
-            style = MaterialTheme.typography.headlineMedium,
-            textAlign = TextAlign.Center
-        )
-        Spacer(modifier = Modifier.height(16.dp))
-        Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
-            Text("Request Permission")
-        }
-    }
 }
 
-@Composable
-private fun ScannerContent(
-    onQrCodeScanned: (String) -> Unit,
-    onClose: () -> Unit
-) {
-    Box(modifier = Modifier.fillMaxSize()) {
-        QRCodeScannerScreen(onQrCodeScanned)
-        IconButton(
-            onClick = onClose,
-            modifier = Modifier
-                .align(Alignment.TopStart)
-                .padding(16.dp)
-        ) {
-            Icon(Icons.Default.ArrowBack, contentDescription = "Close Scanner")
-        }
-    }
-
-    BackHandler { onClose() }
-}
-
-@Composable
-private fun MainContent(uiState: AttendanceUiState) {
-    Box(
-        modifier = Modifier.fillMaxSize(),
-        contentAlignment = Alignment.Center
-    ) {
-        when {
-            uiState.errorMessage != null -> {
-                ErrorContent(
-                    errorMessage = uiState.errorMessage,
-                    userName = uiState.userName,
-                    checkedOutTime = uiState.checkedOutTime
-                )
-            }
-            uiState.isCheckedIn -> {
-                AttendanceStatusCard(
-                    title = "Checked In as",
-                    userName = uiState.userName
-                )
-            }
-            uiState.isCheckedOut -> {
-                AttendanceStatusCard(
-                    title = "Checked Out as",
-                    userName = uiState.userName
-                )
-            }
-        }
-    }
-}
-
-@Composable
-private fun AttendanceStatusCard(
-    title: String,
-    userName: String?
-) {
-    Column(horizontalAlignment = Alignment.CenterHorizontally) {
-        OutlinedCard {
-            Text(
-                text = title,
-                letterSpacing = 2.sp,
-                lineHeight = 40.sp,
-                fontSize = 30.sp,
-                color = Color.Green,
-                fontWeight = FontWeight.Bold,
-                modifier = Modifier.padding(10.dp, 5.dp)
-            )
-        }
-        Spacer(modifier = Modifier.height(10.dp))
-        Text(
-            text = userName ?: "",
-            letterSpacing = 2.sp,
-            lineHeight = 40.sp,
-            fontSize = 30.sp,
-            fontWeight = FontWeight.Bold
-        )
-    }
-}
-@Composable
-private fun ErrorContent(
-    errorMessage: String,
-    userName: String?,
-    checkedOutTime: String
-) {
-    Column(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(20.dp),
-        horizontalAlignment = Alignment.CenterHorizontally
-    ) {
-        // Only show the "Error Message for" text if we have a valid userName
-        if (!userName.isNullOrEmpty()) {
-            OutlinedCard(
-                modifier = Modifier
-                    .fillMaxWidth()
-                    .padding(bottom = 16.dp)
-            ) {
-                Text(
-                    text = buildAnnotatedString {
-                        append("Error Message for ")
-                        withStyle(style = SpanStyle(color = Color.Green)) {
-                            append(userName)
-                        }
-                    },
-                    style = MaterialTheme.typography.titleMedium,
-                    modifier = Modifier.padding(16.dp)
-                )
-            }
-        }
-
-        OutlinedCard(
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(bottom = if (checkedOutTime.isNotEmpty()) 16.dp else 0.dp)
-        ) {
-            Text(
-                text = errorMessage,
-                style = MaterialTheme.typography.titleLarge,
-                color = MaterialTheme.colorScheme.error,
-                modifier = Modifier.padding(16.dp)
-            )
-        }
-
-        if (checkedOutTime.isNotEmpty()) {
-            OutlinedCard(
-                modifier = Modifier.fillMaxWidth()
-            ) {
-                Column(
-                    modifier = Modifier.padding(16.dp),
-                    horizontalAlignment = Alignment.CenterHorizontally
-                ) {
-                    Text(
-                        text = "Check Out Time",
-                        style = MaterialTheme.typography.titleLarge
-                    )
-                    Spacer(modifier = Modifier.height(8.dp))
-                    Text(
-                        text = checkedOutTime,
-                        style = MaterialTheme.typography.titleLarge,
-                        color = Color.Green
-                    )
-                }
-            }
-        }
-    }
-}
-
-@Composable
-private fun LoadingOverlay() {
-    Box(
-        modifier = Modifier
-            .fillMaxSize()
-            .background(Color.Black.copy(alpha = 0.3f)),
-        contentAlignment = Alignment.Center
-    ) {
-        CircularProgressIndicator(
-            color = MaterialTheme.colorScheme.primary,
-            modifier = Modifier.size(48.dp)
-        )
-    }
-}
-
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-private fun ScannerToggleButton(
-    isScanning: Boolean,
-    onClick: () -> Unit,
-    modifier: Modifier = Modifier
-) {
-    OutlinedCard(
-        onClick = onClick,
-        colors = CardDefaults.cardColors(
-            containerColor = MaterialTheme.colorScheme.primary
-        ),
-        modifier = modifier
-            .fillMaxWidth()
-            .padding(16.dp)
-    ) {
-        Row(
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(vertical = 16.dp),
-            horizontalArrangement = Arrangement.Center,
-            verticalAlignment = Alignment.CenterVertically
-        ) {
-            Icon(
-                imageVector = if (isScanning) Icons.Default.Close else Icons.Default.KeyboardArrowUp,
-                contentDescription = null,
-                modifier = Modifier.padding(end = 8.dp)
-            )
-            Text(
-                text = if (isScanning) "Close Scanner" else "Open Scanner",
-                style = MaterialTheme.typography.titleMedium,
-                fontWeight = FontWeight.Bold
-            )
-        }
-    }
-}

app/src/main/java/in/sminnovations/attendanceapp/screens/home/viewModel/homeVM.kt

@@ -1,17 +1,23 @@
 package `in`.sminnovations.attendanceapp.screens.home.viewModel
 
 
-import android.util.Log
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+import androidx.lifecycle.LiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.asFlow
 import androidx.lifecycle.viewModelScope
-import androidx.lifecycle.viewmodel.compose.viewModel
 import com.google.firebase.Timestamp
 import com.google.firebase.firestore.DocumentSnapshot
 import com.google.firebase.firestore.FirebaseFirestore
 import dagger.hilt.android.lifecycle.HiltViewModel
+import `in`.sminnovations.attendanceapp.main.NetworkMonitor
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.tasks.await
@@ -19,18 +25,42 @@ import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 import javax.inject.Inject
+
 @HiltViewModel
 class HomeViewModel @Inject constructor(
+    private val applicationContext: Context,
     private val firebaseFirestore: FirebaseFirestore,
+    private val networkMonitor: NetworkMonitor
 ) : ViewModel() {
 
     private val _uiState = MutableStateFlow(AttendanceUiState())
     val uiState: StateFlow<AttendanceUiState> = _uiState.asStateFlow()
 
     init {
-        viewModelScope.launch {
-            startScanning()
+
+        networkMonitor.startMonitoring()
+        networkMonitor.isConnected.asFlow()
+            .onEach { isConnected ->
+                _uiState.update { currentState ->
+                    currentState.copy(isConnected = isConnected)
+                }
+            }
+            .launchIn(viewModelScope)
+        if (uiState.value.isConnected) {
+            viewModelScope.launch {
+                startScanning()
+            }
         }
+
+    }
+
+    fun stopMonitoring() {
+        networkMonitor.stopMonitoring()
+    }
+
+    fun reStartMonitoring() {
+        networkMonitor.stopMonitoring()
+        networkMonitor.startMonitoring()
     }
 
     fun startScanning() {
@@ -43,13 +73,12 @@ class HomeViewModel @Inject constructor(
         }
     }
 
+
     fun stopScanning() {
         viewModelScope.launch {
             _uiState.update { currentState ->
                 currentState.copy(
-                    isScanning = false,
-                    errorMessage = null,
-                    qrCodeValue = null
+                    isScanning = false, errorMessage = null, qrCodeValue = null
                 )
             }
         }
@@ -77,8 +106,7 @@ class HomeViewModel @Inject constructor(
                 setLoading(true)
                 _uiState.update {
                     it.copy(
-                        errorMessage = null,
-                        userName = null // Reset userName before processing
+                        errorMessage = null, userName = null // Reset userName before processing
                     )
                 }
 
@@ -138,11 +166,11 @@ class HomeViewModel @Inject constructor(
             checkOut != null -> {
                 _uiState.update {
                     it.copy(
-                        checkedOutTime = checkOut,
-                        errorMessage = "Already checked out for today."
+                        checkedOutTime = checkOut, errorMessage = "Already checked out for today."
                     )
                 }
             }
+
             else -> handleError("Invalid attendance record")
         }
     }
@@ -155,15 +183,12 @@ class HomeViewModel @Inject constructor(
                 "checkOut" to "NA"
             )
 
-            firebaseFirestore.collection("attendance_$userId")
-                .document(currentDate)
-                .set(checkInData)
-                .await()
+            firebaseFirestore.collection("attendance_$userId").document(currentDate)
+                .set(checkInData).await()
 
             _uiState.update {
                 it.copy(
-                    isCheckedIn = true,
-                    qrCodeValue = null
+                    isCheckedIn = true, qrCodeValue = null
                 )
             }
         } catch (e: Exception) {
@@ -174,16 +199,14 @@ class HomeViewModel @Inject constructor(
     private suspend fun processCheckOut(userId: String, document: DocumentSnapshot) {
         try {
             val checkOutData = hashMapOf(
-                "checkOut" to formatTimestamp(Timestamp.now()),
-                "DayCompleted" to true
+                "checkOut" to formatTimestamp(Timestamp.now()), "DayCompleted" to true
             )
 
             document.reference.update(checkOutData as Map<String, Any>).await()
 
             _uiState.update {
                 it.copy(
-                    isCheckedOut = true,
-                    qrCodeValue = null
+                    isCheckedOut = true, qrCodeValue = null
                 )
             }
         } catch (e: Exception) {
@@ -193,10 +216,8 @@ class HomeViewModel @Inject constructor(
 
     private suspend fun getEmployeeDocument(userId: String): DocumentSnapshot? {
         return try {
-            val querySnapshot = firebaseFirestore.collection("employees")
-                .whereEqualTo("Id", userId)
-                .get()
-                .await()
+            val querySnapshot =
+                firebaseFirestore.collection("employees").whereEqualTo("Id", userId).get().await()
 
             if (querySnapshot.isEmpty) null else querySnapshot.documents.first()
         } catch (e: Exception) {
@@ -206,10 +227,7 @@ class HomeViewModel @Inject constructor(
 
     private suspend fun getAttendanceDocument(userId: String, date: String): DocumentSnapshot? {
         return try {
-            firebaseFirestore.collection("attendance_$userId")
-                .document(date)
-                .get()
-                .await()
+            firebaseFirestore.collection("attendance_$userId").document(date).get().await()
         } catch (e: Exception) {
             throw Exception("Failed to fetch attendance data")
         }
@@ -227,9 +245,32 @@ class HomeViewModel @Inject constructor(
     }
 
     private fun formatTimestamp(timestamp: Timestamp): String {
-        return SimpleDateFormat("dd MMMM yyyy hh:mm:ss a", Locale.getDefault())
-            .format(timestamp.toDate())
+        return SimpleDateFormat(
+            "dd MMMM yyyy hh:mm:ss a",
+            Locale.getDefault()
+        ).format(timestamp.toDate())
     }
+
+
+    fun isDeviceConnectedToInternet(context: Context): Boolean {
+        val connectivityManager =
+            context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+
+        val network = connectivityManager.activeNetwork ?: return false
+        val networkCapabilities =
+            connectivityManager.getNetworkCapabilities(network) ?: return false
+        return when {
+            networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
+            networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
+            networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> true
+            else -> false
+        }
+    }
+    override fun onCleared() {
+        super.onCleared()
+        networkMonitor.stopMonitoring()
+    }
+
 }
 
 data class AttendanceUiState(
@@ -240,5 +281,6 @@ data class AttendanceUiState(
     val isCheckedOut: Boolean = false,
     val checkedOutTime: String = "",
     val errorMessage: String? = null,
-    val isLoading: Boolean = false
+    val isLoading: Boolean = false,
+    val isConnected : Boolean =true
 )