Possibly fixed-for-good a bug that caused events to be fetched but not stored properly in the database; I believe this was caused by FetcherActivity.kt sequentially executing nukeEvents() and insertEvents(), but doing both asynchronously, and individually, which could mean that insertEvents() finishes before nukeEvents() and therefore nukeEvents() would delete the old events as well as the new ones. This doesn't seem entirely logical to me, as no ConflictStrategy has been configured, and inserting new events before the old ones have been cleared (since they both start their primary keys at 0) would have crashed the app.

app/src/main/java/com/denizk0461/studip/activity/FetcherActivity.kt

@@ -6,10 +6,8 @@ import android.os.Bundle
 import android.webkit.WebResourceRequest
 import android.webkit.WebView
 import android.webkit.WebViewClient
-import android.widget.Toast
 import androidx.lifecycle.ViewModelProvider
 import com.denizk0461.studip.R
-import com.denizk0461.studip.data.StudIPParser
 import com.denizk0461.studip.data.getThemedColor
 import com.denizk0461.studip.databinding.ActivityFetcherBinding
 import com.denizk0461.studip.viewmodel.FetcherViewModel
@@ -72,21 +70,25 @@ class FetcherActivity : Activity() {
             ) { p0 ->
                 try {
                     // Decode HTML and parse it into a list of StudIPEvent.kt
-                    StudIPParser().parse(URLDecoder.decode(p0, "UTF-8")) { events ->
-                        // Delete all previously fetched elements
-                        viewModel.nukeEvents()
-
-                        // Insert the list into the database
-                        viewModel.insertEvents(events)
-
-                        // Notify the user that the fetch was successful
-                        Toast.makeText(
-                            this, R.string.toast_fetch_finished, Toast.LENGTH_SHORT
-                        ).show()
-
-                        // Close the activity
-                        finish()
-                    }
+                    // TODO this exception handling and finish() is broken
+                    viewModel.parse(URLDecoder.decode(p0, "UTF-8"))
+//                    StudIPParser(application).parse(URLDecoder.decode(p0, "UTF-8")) { events ->
+//
+//                        // Delete all previously fetched elements
+////                        viewModel.nukeEvents()
+////                        viewModel.replaceEvents(events)
+//
+//                        // Insert the list into the database
+////                        viewModel.insertEvents(events)
+//
+//                        // Notify the user that the fetch was successful
+//                        Toast.makeText(
+//                            this, R.string.toast_fetch_finished, Toast.LENGTH_SHORT
+//                        ).show()
+//
+//                        // Close the activity
+//                        finish()
+//                    }
                 } catch (e: IOException) {
 
                     // Let the user know that an error occurred

app/src/main/java/com/denizk0461/studip/activity/MainActivity.kt

@@ -1,12 +1,11 @@
 package com.denizk0461.studip.activity
 
 import android.os.Bundle
-import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.WindowCompat
+import androidx.fragment.app.FragmentActivity
 import androidx.fragment.app.FragmentTransaction
 import androidx.lifecycle.Lifecycle
 import com.denizk0461.studip.R
-import com.denizk0461.studip.data.Dependencies
 import com.denizk0461.studip.databinding.ActivityMainBinding
 import com.denizk0461.studip.db.AppRepository
 import com.denizk0461.studip.fragment.EventFragment
@@ -17,7 +16,7 @@ import com.denizk0461.studip.model.SettingsPreferences
 /**
  * Main activity that handles all common fragments. This is opened on app launch.
  */
-class MainActivity : AppCompatActivity() {
+class MainActivity : FragmentActivity() {
 
     // View binding
     private lateinit var binding: ActivityMainBinding
@@ -36,7 +35,7 @@ class MainActivity : AppCompatActivity() {
          * Instantiate repository object that is accessed by the fragments' view models to retrieve
          * data.
          */
-        Dependencies.repo = AppRepository(application)
+//        Dependencies.repo = AppRepository(application)
 
         // Inflate view binding and bind to this activity
         binding = ActivityMainBinding.inflate(layoutInflater)
@@ -44,7 +43,8 @@ class MainActivity : AppCompatActivity() {
 
         // Open the fragment that the user specified to open on app start
         if (
-            Dependencies.repo.getBooleanPreference(SettingsPreferences.LAUNCH_CANTEEN_ON_START)
+            AppRepository.getRepositoryInstance(application)
+                .getBooleanPreference(SettingsPreferences.LAUNCH_CANTEEN_ON_START)
         ) {
             // Open canteen fragment
             binding.contentMain.navView.selectedItemId = R.id.food