Show a message when the network connection is lost

androidApp/src/main/java/bou/amine/apps/readerforselfossv2/android/HomeActivity.kt

@@ -17,6 +17,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.SearchView
 import androidx.core.view.doOnNextLayout
 import androidx.drawerlayout.widget.DrawerLayout
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.*
 import androidx.room.Room
 import androidx.work.Constraints
@@ -178,6 +179,12 @@ class HomeActivity : AppCompatActivity(), SearchView.OnQueryTextListener, DIAwar
 
         dataBase = AndroidDeviceDatabase(applicationContext)
 
+        lifecycleScope.launch {
+            repository.toastMessageState.collect {
+                Toast.makeText(baseContext, it, Toast.LENGTH_SHORT).show()
+            }
+        }
+
         handleBottomBar()
         handleDrawer()
 

shared/src/commonMain/kotlin/bou/amine/apps/readerforselfossv2/repository/RepositoryImpl.kt

@@ -10,6 +10,9 @@ import com.russhwolf.settings.Settings
 import io.github.aakira.napier.Napier
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 
 class Repository(private val api: SelfossApi, private val apiDetails: ApiDetailsService, connectivityStatus: ConnectivityStatus) {
@@ -18,6 +21,9 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
     var items = ArrayList<SelfossModel.Item>()
     private val isConnectionAvailable = connectivityStatus.isNetworkConnected
 
+    private val _toastMessageState = MutableSharedFlow<String>(0)
+    val toastMessageState = _toastMessageState.asSharedFlow()
+
     var baseUrl = apiDetails.getBaseUrl()
     lateinit var dateUtils: DateUtils
 
@@ -45,6 +51,13 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
             updateApiVersion()
             dateUtils = DateUtils(apiMajorVersion)
             reloadBadges()
+
+            isConnectionAvailable.asStateFlow().collect { connectionAvailable ->
+                if (!connectionAvailable) {
+                    // TODO: Localize this string
+                    _toastMessageState.emit("Network connection lost")
+                }
+            }
         }
     }
 
@@ -65,7 +78,6 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
                 items = ArrayList(fetchedItems)
             }
         } else {
-            // TODO: Provide an error message if the connection is not available.
             // TODO: Get items from the database
         }
         return items
@@ -88,7 +100,7 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
                 appendItems(fetchedItems)
             }
         } else {
-            // TODO: Provide an error message
+            // TODO: Get items from the database
         }
         return items
     }
@@ -105,6 +117,7 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
                 null
             )
         } else {
+            // TODO: Provide an error message
             null
         }
     }
@@ -186,7 +199,6 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
     }
 
     suspend fun unmarkAsRead(item: SelfossModel.Item): Boolean {
-        // TODO: Check internet connection
         val success = unmarkAsReadById(item.id)
 
         if (success) {
@@ -196,7 +208,6 @@ class Repository(private val api: SelfossApi, private val apiDetails: ApiDetails
     }
 
     suspend fun unmarkAsReadById(id: Int): Boolean {
-        // TODO: Check internet connection
         var success = false
         if (isConnectionAvailable.value && !offlineOverride) {
             success = api.unmarkAsRead(id.toString())?.isSuccess == true