FILTERING WORKS

app/src/main/java/com/denizk0461/studip/adapter/CanteenOfferPageAdapter.kt

@@ -1,14 +1,14 @@
 package com.denizk0461.studip.adapter
 
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.ViewGroup
 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, private var prefs: DietaryPrefObject) : RecyclerView.Adapter<CanteenOfferPageAdapter.CanteenOfferPageViewHolder>() {
+class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private var daysCovered: Int, private var prefsRegex: Regex) : RecyclerView.Adapter<CanteenOfferPageAdapter.CanteenOfferPageViewHolder>() {
 
     class CanteenOfferPageViewHolder(val binding: ItemScrollablePageBinding) : RecyclerView.ViewHolder(binding.root)
 
@@ -30,8 +30,26 @@ class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private va
             layoutManager = LinearLayoutManager(holder.binding.root.context, LinearLayoutManager.VERTICAL, false)
 
             // 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
+//            Log.d("eek!5", prefsRegex.toString())
+            val filteredForDate = offers.filter { it.dateId == position }
+
+            val filteredForPreferences = if (prefsRegex.toString() == "ffffffffff") {
+                // show all elements and skip filtering
+                filteredForDate
+            } else {
+                filteredForDate.filter {
+                    Log.d("eek!5", it.dietaryPreferences)
+                    prefsRegex.matches(it.dietaryPreferences)
+                }
+            }
+//                .filter { it.dietaryPreferences == prefs.deconstruct() }
+
+//            val filtered2 = filtered
+//            offers
+
+
+
+            adapter = CanteenOfferItemAdapter(filteredForPreferences) // TODO check if empty
             scheduleLayoutAnimation()
         }
     }
@@ -42,8 +60,11 @@ class CanteenOfferPageAdapter(private var offers: List<CanteenOffer>, private va
         notifyDataSetChanged()
     }
 
-    fun refreshView(prefs: DietaryPrefObject) {
-        this.prefs = prefs
+    fun refreshView(prefsRegex: Regex) {
+        this.prefsRegex = prefsRegex
         notifyDataSetChanged()
     }
+
+//    private fun constructRegex(pref: String): String =
+//        pref.replace('f', '.')
 }

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

@@ -6,7 +6,7 @@ import androidx.lifecycle.LiveData
 import androidx.preference.PreferenceManager
 import com.denizk0461.studip.model.*
 
-class EventRepository(private val app: Application) {
+class EventRepository(app: Application) {
 
     private val dao: EventDAO = EventDatabase.getInstance(app.applicationContext).dao()
     private val prefs = PreferenceManager.getDefaultSharedPreferences(app)
@@ -21,31 +21,8 @@ class EventRepository(private val app: Application) {
 
     val allOffers: LiveData<List<CanteenOffer>> = dao.allOffers
 
-    // is this better than List.filter?
-    fun getOffersByPreference(prefs: String = getDietaryPrefs()): LiveData<List<CanteenOffer>> {
-        return if (prefs != "ffffffffff") {//isPreferenceSet()) {
-            dao.getOffersByPreference(
-                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
-    }
-
-
     fun getDietaryPrefs(): String {
-        return prefs.getString(dietaryPrefString, "ffffffffff") ?: "ffffffffff"
+        return prefs.getString(dietaryPrefString, "..........") ?: ".........."
 //        return DietaryPrefObject(
 //            isFair = prefs.getBoolean(DietaryPreferences.FAIR.value, false),
 //            isFish = prefs.getBoolean(DietaryPreferences.FISH.value, false),
@@ -98,7 +75,7 @@ class EventRepository(private val app: Application) {
         prefs.edit().putString(dietaryPrefString, newString).apply()
     }
 
-    private fun Boolean.toChar() = if (this) 't' else 'f'
+    private fun Boolean.toChar() = if (this) 't' else '.'
 
     fun getPreference(pref: DietaryPreferences): Boolean {
         val prefString = getDietaryPrefs().toList()

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

@@ -5,17 +5,14 @@ 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
 import com.google.android.material.tabs.TabLayoutMediator
 
 class CanteenFragment : Fragment() {
@@ -71,40 +68,17 @@ class CanteenFragment : Fragment() {
             }
         }
 
-//        binding.chipPrefFair
-//        binding.chipPrefFair.setOnCheckedChangeListener { _, newValue ->
-//            setPreference(DietaryPreferences.FAIR, newValue)
-//        }
-
-        viewPagerAdapter = CanteenOfferPageAdapter(listOf(), 0, viewModel.getDietaryPrefs())
+        viewPagerAdapter = CanteenOfferPageAdapter(listOf(), 0, getPrefRegex())
         binding.viewPager.adapter = viewPagerAdapter
 
         createTabLayoutMediator()
 
-        liveData = viewModel.getOffersByPreference()
+        liveData = viewModel.allOffers
         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
@@ -135,17 +109,12 @@ 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?
+        viewPagerAdapter.refreshView(getPrefRegex())
     }
 
     private fun getPreference(pref: DietaryPreferences): Boolean =
         viewModel.getPreference(pref)
 
-    private fun MutableLiveData<List<CanteenOffer>>.forceRefresh() {
-        this.value = this.value
-    }
+    private fun getPrefRegex(): Regex =
+        Regex(viewModel.getDietaryPrefs().deconstruct().replace('t', '.'))
 }

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

@@ -15,7 +15,7 @@ data class DietaryPrefObject(
     companion object {
         /* assume that the values must be parsed as follows:
          * "xxxxxxxxxx"
-         * t = true, f = false
+         * t = true, . = false
          */
         fun construct(values: String) = DietaryPrefObject(
             isFair = values[0] == 't',

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

@@ -2,7 +2,6 @@ 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
@@ -12,26 +11,10 @@ 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>> {
-        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() }}
-
     fun fetchOffers(onRefreshUpdate: (status: Int) -> Unit, onFinish: () -> Unit) { doAsync { parser.parse(onRefreshUpdate, onFinish) }}
 
     fun setPreference(pref: DietaryPreferences, newValue: Boolean) { repo.setPreference(pref, newValue) }