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/adapter/CanteenOfferPageAdapter.kt

@@ -6,8 +6,9 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.denizk0461.studip.databinding.ItemScrollablePageBinding
 import com.denizk0461.studip.model.CanteenOffer
+import com.denizk0461.studip.model.DietaryPrefObject
 
-class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private var daysCovered: Int) : RecyclerView.Adapter<CanteenOfferPageAdapter.CanteenOfferPageViewHolder>() {
+class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private var daysCovered: Int, private var prefs: DietaryPrefObject) : RecyclerView.Adapter<CanteenOfferPageAdapter.CanteenOfferPageViewHolder>() {
 
     class CanteenOfferPageViewHolder(val binding: ItemScrollablePageBinding) : RecyclerView.ViewHolder(binding.root)
 
@@ -28,7 +29,8 @@ class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private va
 
             layoutManager = LinearLayoutManager(holder.binding.root.context, LinearLayoutManager.VERTICAL, false)
 
-            val filtered = offers.filter { it.dateId == position }
+            // TODO second filter needs to be worked on; it shouldn't filter out something if two options are selected and only one is met
+            val filtered = offers.filter { it.dateId == position }.filter { it.dietaryPreferences == prefs.deconstruct() }
             adapter = CanteenOfferItemAdapter(filtered) // TODO check if empty
             scheduleLayoutAnimation()
         }
@@ -39,4 +41,9 @@ class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private va
         offers = items
         notifyDataSetChanged()
     }
+
+    fun refreshView(prefs: DietaryPrefObject) {
+        this.prefs = prefs
+        notifyDataSetChanged()
+    }
 }

app/src/main/java/com/denizk0461/studip/data/StwParser.kt

@@ -76,22 +76,28 @@ class StwParser {
                         val prefs =
                             element.getElementsByClass("field field-name-field-food-types")[0]
 
+                        val prefString = DietaryPrefObject(
+                            isFair = prefs.isDietaryPreferenceMet(PREFERENCE_FAIR),
+                            isFish = prefs.isDietaryPreferenceMet(PREFERENCE_FISH),
+                            isPoultry = prefs.isDietaryPreferenceMet(PREFERENCE_POULTRY),
+                            isLamb = prefs.isDietaryPreferenceMet(PREFERENCE_LAMB),
+                            isVital = prefs.isDietaryPreferenceMet(PREFERENCE_VITAL),
+                            isBeef = prefs.isDietaryPreferenceMet(PREFERENCE_BEEF),
+                            isPork = prefs.isDietaryPreferenceMet(PREFERENCE_PORK),
+                            isVegan = prefs.isDietaryPreferenceMet(PREFERENCE_VEGAN),
+                            isVegetarian = prefs.isDietaryPreferenceMet(PREFERENCE_VEGETARIAN),
+                            isGame = prefs.isDietaryPreferenceMet(PREFERENCE_GAME),
+                        ).deconstruct()
+
+//                        Log.d("eek!4", "prefString = $prefString")
+
                         repo.insert(
                             OfferItem(
                                 itemId,
                                 categoryId,
                                 title = tableRows[1].getFilteredText(),
                                 price = tableRows.getTextOrEmpty(2),
-                                isFair = prefs.isDietaryPreferenceMet(PREFERENCE_FAIR),
-                                isFish = prefs.isDietaryPreferenceMet(PREFERENCE_FISH),
-                                isPoultry = prefs.isDietaryPreferenceMet(PREFERENCE_POULTRY),
-                                isLamb = prefs.isDietaryPreferenceMet(PREFERENCE_LAMB),
-                                isVital = prefs.isDietaryPreferenceMet(PREFERENCE_VITAL),
-                                isBeef = prefs.isDietaryPreferenceMet(PREFERENCE_BEEF),
-                                isPork = prefs.isDietaryPreferenceMet(PREFERENCE_PORK),
-                                isVegan = prefs.isDietaryPreferenceMet(PREFERENCE_VEGAN),
-                                isVegetarian = prefs.isDietaryPreferenceMet(PREFERENCE_VEGETARIAN),
-                                isGame = prefs.isDietaryPreferenceMet(PREFERENCE_GAME),
+                                prefString,
                             )
                         )
                         itemId += 1

app/src/main/java/com/denizk0461/studip/db/EventDAO.kt

@@ -46,14 +46,21 @@ interface EventDAO {
                 "JOIN offer_category ON offer_item.categoryId = offer_category.id " +
                 "JOIN offer_canteen ON offer_category.canteenId = offer_canteen.id " +
                 "JOIN offer_date ON offer_category.dateId = offer_date.id " +
-                "WHERE isFair = :isFair AND isFish = :isFish AND isPoultry = :isPoultry " +
-                "AND isLamb = :isLamb AND isVital = :isVital AND isBeef = :isBeef " +
-                "AND isPork = :isPork AND isVegan = :isVegan AND isVegetarian = :isVegetarian " +
-                "AND isGame = :isGame "
+                "WHERE dietary_preferences = :prefs "
+//                "WHERE isFair = :isFair " +
+//                "OR isFish = :isFish " +
+//                "OR isPoultry = :isPoultry " +
+//                "OR isLamb = :isLamb " +
+//                "OR isVital = :isVital " +
+//                "OR isBeef = :isBeef " +
+//                "OR isPork = :isPork " +
+//                "OR isVegan = :isVegan " +
+//                "OR isVegetarian = :isVegetarian " +
+//                "OR isGame = :isGame "
     )
-    fun getOffersByPreference(
-        isFair: Boolean, isFish: Boolean, isPoultry: Boolean, isLamb: Boolean, isVital: Boolean,
-        isBeef: Boolean, isPork: Boolean, isVegan: Boolean, isVegetarian: Boolean, isGame: Boolean
+    fun getOffersByPreference(prefs: String
+//        isFair: Boolean, isFish: Boolean, isPoultry: Boolean, isLamb: Boolean, isVital: Boolean,
+//        isBeef: Boolean, isPork: Boolean, isVegan: Boolean, isVegetarian: Boolean, isGame: Boolean
     ): LiveData<List<CanteenOffer>>
 
     @get:Query("SELECT id FROM offer_date")

app/src/main/java/com/denizk0461/studip/db/EventDatabase.kt

@@ -14,7 +14,7 @@ import com.denizk0461.studip.model.*
         OfferCategory::class,
         OfferItem::class
     ],
-    version = 8
+    version = 10,
 )
 abstract class EventDatabase : RoomDatabase() {
 

app/src/main/java/com/denizk0461/studip/db/EventRepository.kt

@@ -1,6 +1,7 @@
 package com.denizk0461.studip.db
 
 import android.app.Application
+import android.util.Log
 import androidx.lifecycle.LiveData
 import androidx.preference.PreferenceManager
 import com.denizk0461.studip.model.*
@@ -12,6 +13,8 @@ class EventRepository(private val app: Application) {
 
     val allEvents: LiveData<List<StudIPEvent>> = dao.allEvents
 
+    private val dietaryPrefString = "prefs_obj"
+
     fun insertEvent(event: StudIPEvent) { dao.insertEvent(event) }
     fun insertEvents(events: List<StudIPEvent>) { dao.insertEvents(events) }
     fun nukeEvents() { dao.nukeEvents() }
@@ -19,63 +22,100 @@ class EventRepository(private val app: Application) {
     val allOffers: LiveData<List<CanteenOffer>> = dao.allOffers
 
     // is this better than List.filter?
-    fun getOffersByPreference(prefs: DietaryPrefObject = getDietaryPrefs()): LiveData<List<CanteenOffer>> {
-        return if (isPreferenceSet()) {
+    fun getOffersByPreference(prefs: String = getDietaryPrefs()): LiveData<List<CanteenOffer>> {
+        return if (prefs != "ffffffffff") {//isPreferenceSet()) {
             dao.getOffersByPreference(
-                isFair = prefs.isFair,
-                isFish = prefs.isFish,
-                isPoultry = prefs.isPoultry,
-                isLamb = prefs.isLamb,
-                isVital = prefs.isVital,
-                isBeef = prefs.isBeef,
-                isPork = prefs.isPork,
-                isVegan = prefs.isVegan,
-                isVegetarian = prefs.isVegetarian,
-                isGame = prefs.isGame,
+                prefs
+//                isFair = prefs.isFair,
+//                isFish = prefs.isFish,
+//                isPoultry = prefs.isPoultry,
+//                isLamb = prefs.isLamb,
+//                isVital = prefs.isVital,
+//                isBeef = prefs.isBeef,
+//                isPork = prefs.isPork,
+//                isVegan = prefs.isVegan,
+//                isVegetarian = prefs.isVegetarian,
+//                isGame = prefs.isGame,
             )
         } else {
             dao.allOffers
         }
+//        return dao.allOffers
     }
 
 
-    private fun getDietaryPrefs(): DietaryPrefObject {
-        return DietaryPrefObject(
-            isFair = prefs.getBoolean(DietaryPreferences.FAIR.value, false),
-            isFish = prefs.getBoolean(DietaryPreferences.FISH.value, false),
-            isPoultry = prefs.getBoolean(DietaryPreferences.POULTRY.value, false),
-            isLamb = prefs.getBoolean(DietaryPreferences.LAMB.value, false),
-            isVital = prefs.getBoolean(DietaryPreferences.VITAL.value, false),
-            isBeef = prefs.getBoolean(DietaryPreferences.BEEF.value, false),
-            isPork = prefs.getBoolean(DietaryPreferences.PORK.value, false),
-            isVegan = prefs.getBoolean(DietaryPreferences.VEGAN.value, false),
-            isVegetarian = prefs.getBoolean(DietaryPreferences.VEGETARIAN.value, false),
-            isGame = prefs.getBoolean(DietaryPreferences.GAME.value, false),
-        )
+    fun getDietaryPrefs(): String {
+        return prefs.getString(dietaryPrefString, "ffffffffff") ?: "ffffffffff"
+//        return DietaryPrefObject(
+//            isFair = prefs.getBoolean(DietaryPreferences.FAIR.value, false),
+//            isFish = prefs.getBoolean(DietaryPreferences.FISH.value, false),
+//            isPoultry = prefs.getBoolean(DietaryPreferences.POULTRY.value, false),
+//            isLamb = prefs.getBoolean(DietaryPreferences.LAMB.value, false),
+//            isVital = prefs.getBoolean(DietaryPreferences.VITAL.value, false),
+//            isBeef = prefs.getBoolean(DietaryPreferences.BEEF.value, false),
+//            isPork = prefs.getBoolean(DietaryPreferences.PORK.value, false),
+//            isVegan = prefs.getBoolean(DietaryPreferences.VEGAN.value, false),
+//            isVegetarian = prefs.getBoolean(DietaryPreferences.VEGETARIAN.value, false),
+//            isGame = prefs.getBoolean(DietaryPreferences.GAME.value, false),
+//        )
     }
 
-    private fun isPreferenceSet(): Boolean {
-        getDietaryPrefs().also { p ->
-            if (p.isFair) return true
-            if (p.isFish) return true
-            if (p.isPoultry) return true
-            if (p.isLamb) return true
-            if (p.isVital) return true
-            if (p.isBeef) return true
-            if (p.isPork) return true
-            if (p.isVegan) return true
-            if (p.isVegetarian) return true
-            if (p.isGame) return true
-        }
-        return false
-    }
+    fun getDietaryPrefsAsObj(): DietaryPrefObject = DietaryPrefObject.construct(getDietaryPrefs())
+
+//    private fun isPreferenceSet(): Boolean {
+//        getDietaryPrefs().also { p ->
+//            if (p.isFair) return true
+//            if (p.isFish) return true
+//            if (p.isPoultry) return true
+//            if (p.isLamb) return true
+//            if (p.isVital) return true
+//            if (p.isBeef) return true
+//            if (p.isPork) return true
+//            if (p.isVegan) return true
+//            if (p.isVegetarian) return true
+//            if (p.isGame) return true
+//        }
+//        return false
+//    }
 
     fun setPreference(pref: DietaryPreferences, newValue: Boolean) {
-        prefs.edit().putBoolean(pref.value, newValue).apply()
+//        prefs.edit().putBoolean(pref.value, newValue).apply()
+        val oldString = getDietaryPrefs().toMutableList()
+        when (pref) {
+            DietaryPreferences.FAIR -> oldString[0] = newValue.toChar()
+            DietaryPreferences.FISH -> oldString[1] = newValue.toChar()
+            DietaryPreferences.POULTRY -> oldString[2] = newValue.toChar()
+            DietaryPreferences.LAMB -> oldString[3] = newValue.toChar()
+            DietaryPreferences.VITAL -> oldString[4] = newValue.toChar()
+            DietaryPreferences.BEEF -> oldString[5] = newValue.toChar()
+            DietaryPreferences.PORK -> oldString[6] = newValue.toChar()
+            DietaryPreferences.VEGAN -> oldString[7] = newValue.toChar()
+            DietaryPreferences.VEGETARIAN -> oldString[8] = newValue.toChar()
+            DietaryPreferences.GAME -> oldString[9] = newValue.toChar()
+        }
+        val newString = oldString.joinToString("")
+        Log.d("eek!4", newString)
+        prefs.edit().putString(dietaryPrefString, newString).apply()
     }
 
-    fun getPreference(pref: DietaryPreferences): Boolean =
-        prefs.getBoolean(pref.value, false)
+    private fun Boolean.toChar() = if (this) 't' else 'f'
+
+    fun getPreference(pref: DietaryPreferences): Boolean {
+        val prefString = getDietaryPrefs().toList()
+        return when (pref) {
+            DietaryPreferences.FAIR -> prefString[0] == 't'
+            DietaryPreferences.FISH -> prefString[1] == 't'
+            DietaryPreferences.POULTRY -> prefString[2] == 't'
+            DietaryPreferences.LAMB -> prefString[3] == 't'
+            DietaryPreferences.VITAL -> prefString[4] == 't'
+            DietaryPreferences.BEEF -> prefString[5] == 't'
+            DietaryPreferences.PORK -> prefString[6] == 't'
+            DietaryPreferences.VEGAN -> prefString[7] == 't'
+            DietaryPreferences.VEGETARIAN -> prefString[8] == 't'
+            DietaryPreferences.GAME -> prefString[9] == 't'
+        }
+    }
+//        prefs.getBoolean(pref.value, false)
 
 //    fun insertOffers(offers: List<CanteenOffer>) { dao.insertOffers(offers) }
     fun nukeOffers() {

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

@@ -1,14 +1,18 @@
 package com.denizk0461.studip.fragment
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.core.view.children
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
 import com.denizk0461.studip.adapter.CanteenOfferPageAdapter
 import com.denizk0461.studip.databinding.FragmentCanteenBinding
+import com.denizk0461.studip.model.CanteenOffer
 import com.denizk0461.studip.model.DietaryPreferences
 import com.denizk0461.studip.viewmodel.CanteenViewModel
 import com.google.android.material.chip.Chip
@@ -24,6 +28,8 @@ class CanteenFragment : Fragment() {
 
     private var dates = listOf<String>()
 
+    private lateinit var liveData: LiveData<List<CanteenOffer>>
+
     private lateinit var viewPagerAdapter: CanteenOfferPageAdapter
     private val viewModel: CanteenViewModel by viewModels()
 
@@ -35,21 +41,7 @@ class CanteenFragment : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        /* Since this removes the view before immediately adding it back, this method causes a
-         * flicker. Note for the future: implement a more efficient / better-looking method.
-         *
-         * TODO order the chips alphabetically
-         */
-        for (chip in binding.chipsPreference.children) {
-            val nChip = chip as Chip
-            nChip.setOnCheckedChangeListener { buttonView, _ ->
-                val index = binding.chipsPreference.indexOfChild(buttonView)
-                binding.chipsPreference.removeView(buttonView)
-                binding.chipsPreference.addView(buttonView, index)
-            }
-        }
-
-        val chipMap = mapOf<Chip, DietaryPreferences>(
+        val chipMap = mapOf(
             binding.chipPrefFair to DietaryPreferences.FAIR,
             binding.chipPrefFish to DietaryPreferences.FISH,
             binding.chipPrefPoultry to DietaryPreferences.POULTRY,
@@ -62,28 +54,57 @@ class CanteenFragment : Fragment() {
             binding.chipPrefGame to DietaryPreferences.GAME,
         )
 
-        chipMap.forEach { chip, pref ->
+        chipMap.forEach { (chip, pref) ->
             chip.isChecked = getPreference(pref)
-            chip.setOnCheckedChangeListener { _, newValue ->
+            chip.setOnCheckedChangeListener { buttonView, newValue ->
                 setPreference(pref, newValue)
+                Log.d("eek!4", "object as : ${viewModel.getDietaryPrefs().deconstruct()}")
+
+                /* Since this removes the view before immediately adding it back, this method causes a
+                 * flicker. Note for the future: implement a more efficient / better-looking method.
+                 *
+                 * TODO order the chips alphabetically
+                 */
+                val index = binding.chipsPreference.indexOfChild(buttonView)
+                binding.chipsPreference.removeView(buttonView)
+                binding.chipsPreference.addView(buttonView, index)
             }
         }
 
-        binding.chipPrefFair
-        binding.chipPrefFair.setOnCheckedChangeListener { _, newValue ->
-            setPreference(DietaryPreferences.FAIR, newValue)
-        }
+//        binding.chipPrefFair
+//        binding.chipPrefFair.setOnCheckedChangeListener { _, newValue ->
+//            setPreference(DietaryPreferences.FAIR, newValue)
+//        }
 
-        viewPagerAdapter = CanteenOfferPageAdapter(listOf(), 0)
+        viewPagerAdapter = CanteenOfferPageAdapter(listOf(), 0, viewModel.getDietaryPrefs())
         binding.viewPager.adapter = viewPagerAdapter
 
         createTabLayoutMediator()
 
-        viewModel.allOffers.observe(viewLifecycleOwner) { offers ->
+        liveData = viewModel.getOffersByPreference()
+        liveData.observe(viewLifecycleOwner) { offers ->
 
             dates = offers.map { it.date }.distinct()
             createTabLayoutMediator()
 
+//            val newOffers = mutableListOf<CanteenOffer>()
+
+//            val prefs = viewModel.getDietaryPrefs()
+//            if (prefs.isFair) { newOffers.addAll(offers.filter { it.isFair }) }
+//            if (prefs.isFish) { newOffers.addAll(offers.filter { it.isFish }) }
+//            if (prefs.isPoultry) { newOffers.addAll(offers.filter { it.isPoultry }) }
+//            if (prefs.isLamb) { newOffers.addAll(offers.filter { it.isLamb }) }
+//            if (prefs.isVital) { newOffers.addAll(offers.filter { it.isVital }) }
+//            if (prefs.isBeef) { newOffers.addAll(offers.filter { it.isBeef }) }
+//            if (prefs.isPork) { newOffers.addAll(offers.filter { it.isPork }) }
+//            if (prefs.isVegetarian) { newOffers.addAll(offers.filter { it.isVegetarian }) }
+//            if (prefs.isVegan) { newOffers.addAll(offers.filter { it.isVegan }) }
+//            if (prefs.isGame) { newOffers.addAll(offers.filter { it.isGame }) }
+//            newOffers.sortBy { it ->
+//                Log.d("eek!4", "title: ${it.title} - id: ${it.itemId}")
+//                it.itemId
+//            }
+
             viewPagerAdapter.setNewItems(offers, dates.size)
 
             // TODO this must be changed. if an exception is raised, then this will not fire
@@ -92,7 +113,7 @@ class CanteenFragment : Fragment() {
 
         binding.swipeRefreshLayout.setOnRefreshListener {
             viewModel.fetchOffers(onRefreshUpdate = { status ->
-
+                // TODO refresh updates
             }, onFinish = {
 //                binding.swipeRefreshLayout.isRefreshing = false
             })
@@ -114,9 +135,17 @@ class CanteenFragment : Fragment() {
 
     private fun setPreference(pref: DietaryPreferences, newValue: Boolean) {
         viewModel.setPreference(pref, newValue)
+        viewPagerAdapter.refreshView(viewModel.getDietaryPrefs())
+//        Log.d("eek!4", "this")
+//        liveData.forceRefresh()
+//        viewModel.forceRefresh()
         // notifyDataSetChanged?
     }
 
     private fun getPreference(pref: DietaryPreferences): Boolean =
         viewModel.getPreference(pref)
+
+    private fun MutableLiveData<List<CanteenOffer>>.forceRefresh() {
+        this.value = this.value
+    }
 }

app/src/main/java/com/denizk0461/studip/model/CanteenOffer.kt

@@ -1,9 +1,11 @@
 package com.denizk0461.studip.model
 
+import androidx.room.ColumnInfo
+
 //@Entity(tableName = "offers")
 data class CanteenOffer(
 //    @PrimaryKey val id: Int,
-    val id: Int,
+    val itemId: Int,
     val date: String,
     val dateId: Int,
     val category: String,
@@ -12,14 +14,5 @@ data class CanteenOffer(
     val canteenId: Int,
     val title: String,
     val price: String, // price for students
-    val isFair: Boolean, // artgerechte Tierhaltung
-    val isFish: Boolean, // Fisch
-    val isPoultry: Boolean, // Geflügel
-    val isLamb: Boolean, // Lamm
-    val isVital: Boolean, // mensaVital
-    val isBeef: Boolean, // Rindfleisch
-    val isPork: Boolean, // Schweinefleisch
-    val isVegan: Boolean, // plant-based (vegan)
-    val isVegetarian: Boolean, // vegetarisch
-    val isGame: Boolean, // Wild
+    @ColumnInfo(name = "dietary_preferences") val dietaryPreferences: String,
 )

app/src/main/java/com/denizk0461/studip/model/DietaryPrefObject.kt

@@ -11,4 +11,38 @@ data class DietaryPrefObject(
     val isVegan: Boolean,
     val isVegetarian: Boolean,
     val isGame: Boolean,
-)
+) {
+    companion object {
+        /* assume that the values must be parsed as follows:
+         * "xxxxxxxxxx"
+         * t = true, f = false
+         */
+        fun construct(values: String) = DietaryPrefObject(
+            isFair = values[0] == 't',
+            isFish = values[1] == 't',
+            isPoultry = values[2] == 't',
+            isLamb = values[3] == 't',
+            isVital = values[4] == 't',
+            isBeef = values[5] == 't',
+            isPork = values[6] == 't',
+            isVegan = values[7] == 't',
+            isVegetarian = values[8] == 't',
+            isGame = values[9] == 't',
+        )
+    }
+
+    fun deconstruct() = String(
+        charArrayOf(
+            if (this.isFair) 't' else 'f',
+            if (this.isFish) 't' else 'f',
+            if (this.isPoultry) 't' else 'f',
+            if (this.isLamb) 't' else 'f',
+            if (this.isVital) 't' else 'f',
+            if (this.isBeef) 't' else 'f',
+            if (this.isPork) 't' else 'f',
+            if (this.isVegan) 't' else 'f',
+            if (this.isVegetarian) 't' else 'f',
+            if (this.isGame) 't' else 'f',
+        )
+    )
+}

app/src/main/java/com/denizk0461/studip/model/OfferItem.kt

@@ -1,5 +1,6 @@
 package com.denizk0461.studip.model
 
+import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.ForeignKey
 import androidx.room.PrimaryKey
@@ -16,18 +17,19 @@ import androidx.room.PrimaryKey
     ]
 )
 data class OfferItem(
-    @PrimaryKey val id: Int,
+    @PrimaryKey val itemId: Int,
     val categoryId: Int,
     val title: String,
     val price: String,
-    val isFair: Boolean,
-    val isFish: Boolean,
-    val isPoultry: Boolean,
-    val isLamb: Boolean,
-    val isVital: Boolean,
-    val isBeef: Boolean,
-    val isPork: Boolean,
-    val isVegan: Boolean,
-    val isVegetarian: Boolean,
-    val isGame: Boolean,
+    @ColumnInfo(name = "dietary_preferences") val dietaryPreferences: String,
+//    val isFair: Boolean,
+//    val isFish: Boolean,
+//    val isPoultry: Boolean,
+//    val isLamb: Boolean,
+//    val isVital: Boolean,
+//    val isBeef: Boolean,
+//    val isPork: Boolean,
+//    val isVegan: Boolean,
+//    val isVegetarian: Boolean,
+//    val isGame: Boolean,
 )

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() }}

app/src/main/res/drawable/cross.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z"/>
+</vector>

app/src/main/res/layout/fragment_canteen.xml

@@ -61,7 +61,9 @@
                 android:id="@+id/chip_pref_fish"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text="@string/pref_fish"/>
+                android:text="@string/pref_fish"
+                app:chipIcon="@drawable/cross"
+                app:checkedIcon="@drawable/flatware"/>
 
             <com.google.android.material.chip.Chip
                 style="@style/Widget.Material3.Chip.Filter"