Implemented user setting for displaying allergens next to an offer

app/src/main/java/com/denizk0461/studip/fragment/CanteenFragment.kt

@@ -91,7 +91,9 @@ class CanteenFragment : AppFragment(), CanteenOfferItemAdapter.OnClickListener {
         }
 
         // Set up the view pager's adapter
-        viewPagerAdapter = CanteenOfferPageAdapter(listOf(), 0, this)
+        viewPagerAdapter = CanteenOfferPageAdapter(
+            listOf(), 0, this, viewModel.preferenceAllergen
+        )
 
         // Assign the adapter to the view pager
         binding.viewPager.adapter = viewPagerAdapter
@@ -129,7 +131,7 @@ class CanteenFragment : AppFragment(), CanteenOfferItemAdapter.OnClickListener {
             viewModel.fetchOffers(onRefreshUpdate = { status ->
                 // TODO refresh updates
             }, onFinish = {
-                createTabLayoutMediator()
+//                createTabLayoutMediator()
 //                binding.swipeRefreshLayout.isRefreshing = false
 //                createTabLayoutMediator()
             })

app/src/main/java/com/denizk0461/studip/fragment/SettingsFragment.kt

@@ -7,9 +7,11 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.fragment.app.viewModels
 import com.denizk0461.studip.BuildConfig
 import com.denizk0461.studip.activity.FetcherActivity
 import com.denizk0461.studip.databinding.FragmentSettingsBinding
+import com.denizk0461.studip.viewmodel.SettingsViewModel
 
 /**
  * User-facing fragment view that is used to change app settings.
@@ -25,6 +27,9 @@ class SettingsFragment : AppFragment() {
      */
     private val binding get() = _binding!!
 
+    // View model reference for providing access to the database
+    private val viewModel: SettingsViewModel by viewModels()
+
     // Click counter on the app version button
     private var appVersionClick = 0
 
@@ -45,6 +50,13 @@ class SettingsFragment : AppFragment() {
             launchWebView()
         }
 
+        binding.switchAllergens.apply {
+            isChecked = viewModel.preferenceAllergen
+            setOnCheckedChangeListener { _, b ->
+                viewModel.preferenceAllergen = b
+            }
+        }
+
         // Set click listener for the app version button
         binding.buttonAppVersion.setOnClickListener {
             when (appVersionClick) {