Remove code in AndroidVersionRepository.kt

Author: LukasLechnerDev

app/src/main/java/com/lukaslechner/coroutineusecasesonandroid/usecases/coroutines/usecase14/AndroidVersionRepository.kt

@@ -3,9 +3,6 @@ package com.lukaslechner.coroutineusecasesonandroid.usecases.coroutines.usecase1
 import com.lukaslechner.coroutineusecasesonandroid.mock.AndroidVersion
 import com.lukaslechner.coroutineusecasesonandroid.mock.MockApi
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.async
-import kotlinx.coroutines.launch
-import timber.log.Timber
 
 class AndroidVersionRepository(
     private var database: AndroidVersionDao,
@@ -18,20 +15,10 @@ class AndroidVersionRepository(
     }
 
     suspend fun loadAndStoreRemoteAndroidVersions(): List<AndroidVersion> {
-        return scope.async {
-            val recentVersions = api.getRecentAndroidVersions()
-                Timber.d("Recent Android versions loaded")
-                for (recentVersion in recentVersions) {
-                    Timber.d("Insert $recentVersion to database")
-                    database.insert(recentVersion.mapToEntity())
-                }
-                recentVersions
-            }.await()
-        }
+        return emptyList()
+    }
 
     fun clearDatabase() {
-        scope.launch {
-            database.clear()
-        }
+
     }
 }

app/src/main/java/com/lukaslechner/coroutineusecasesonandroid/usecases/coroutines/usecase14/ContinueCoroutineWhenUserLeavesScreenViewModel.kt

@@ -1,17 +1,45 @@
 package com.lukaslechner.coroutineusecasesonandroid.usecases.coroutines.usecase14
 
+import androidx.lifecycle.viewModelScope
 import com.lukaslechner.coroutineusecasesonandroid.base.BaseViewModel
+import kotlinx.coroutines.launch
 
 class ContinueCoroutineWhenUserLeavesScreenViewModel(
     private var repository: AndroidVersionRepository
 ) : BaseViewModel<UiState>() {
 
+    // more information in this blogpost about "Coroutines & Patterns for work that shouldn't
+    // be cancelled" =>
+    // https://medium.com/androiddevelopers/coroutines-patterns-for-work-that-shouldnt-be-cancelled-e26c40f142ad
+
     fun loadData() {
+        uiState.value = UiState.Loading.LoadFromDb
+
+        viewModelScope.launch {
+            val localVersions = repository.getLocalAndroidVersions()
+            if (localVersions.isNotEmpty()) {
+                uiState.value =
+                    UiState.Success(DataSource.Database, localVersions)
+            } else {
+                uiState.value =
+                    UiState.Error(DataSource.Database, "Database empty!")
+            }
 
+            uiState.value = UiState.Loading.LoadFromNetwork
+
+            try {
+                uiState.value = UiState.Success(
+                    DataSource.Network,
+                    repository.loadAndStoreRemoteAndroidVersions()
+                )
+            } catch (exception: Exception) {
+                uiState.value = UiState.Error(DataSource.Network, "Network Request failed")
+            }
+        }
     }
 
     fun clearDatabase() {
-
+        repository.clearDatabase()
     }
 }