Made some improvements to the dietary preference handling, but CanteenOfferPageAdapter.kt still needs some work for the filtering to work properly; it should only filter out elements if they meet NO preferences!

app/src/main/java/com/denizk0461/studip/viewmodel/CanteenViewModel.kt

@@ -2,18 +2,32 @@ package com.denizk0461.studip.viewmodel
 
 import android.app.Application
 import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
 import com.denizk0461.studip.data.StwParser
 import com.denizk0461.studip.model.CanteenOffer
+import com.denizk0461.studip.model.DietaryPrefObject
 import com.denizk0461.studip.model.DietaryPreferences
 
 class CanteenViewModel(app: Application) : TemplateViewModel(app) {
 
     private val parser = StwParser()
 
+    // bad pattern i know
+    private val mutableOffers = MutableLiveData<List<CanteenOffer>>()
+
     val allOffers: LiveData<List<CanteenOffer>> = repo.allOffers
 
-    fun getOffersByPreference(): LiveData<List<CanteenOffer>> =
-        repo.getOffersByPreference()
+    fun getOffersByPreference(): LiveData<List<CanteenOffer>> {
+        val of = repo.getOffersByPreference()
+        mutableOffers.postValue(of.value)
+        return of
+    }
+
+    fun getDietaryPrefs(): DietaryPrefObject = repo.getDietaryPrefsAsObj()
+
+    fun forceRefresh() {
+        mutableOffers.value = mutableOffers.value
+    }
 
 //    fun insertOffers(offers: List<CanteenOffer>) { doAsync { repo.insertOffers(offers) }}
     fun nukeOffers() { doAsync { repo.nukeOffers() }}