Edited canteen views to have direct database access in the CanteenPageFragment.kt, allowing for filtering the individual days through the database; filtering now works (with changes animated!!) through updating a LiveData and observing it in the page fragment

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

@@ -4,53 +4,29 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
 import androidx.viewpager2.adapter.FragmentStateAdapter
 import com.denizk0461.studip.fragment.CanteenPageFragment
-import com.denizk0461.studip.model.CanteenOfferGroup
 
 
 /**
  * Custom ViewPager adapter for managing multiple pages of canteen offers.
  *
  * @param fragmentActivity  parent fragment activity
- * @param offers            all offers for a given canteen, grouped by category (not filtered by day at
- *                          this point)
- * @param daysCovered       tells for how many days offers are available for.
- *                          Example: if the next two weeks are available, Monday through Friday and
- *                          excluding weekends, this value should be 10.
- * @param onClickListener   for managing click and long press events
- * @param displayAllergens  whether the user wants allergens to be marked
  */
 class CanteenOfferPageAdapter(
     fragmentActivity: FragmentActivity,
-    private var offers: List<CanteenOfferGroup>,
-    private var daysCovered: Int,
-    private val onClickListener: CanteenOfferItemAdapter.OnClickListener,
-    private val displayAllergens: Boolean,
 ) : FragmentStateAdapter(fragmentActivity) {
 
+    private var count: Int = 0
+
     // Returns the count of days covered
-    override fun getItemCount(): Int = daysCovered
+    override fun getItemCount(): Int = count
 
     override fun createFragment(position: Int): Fragment =
         CanteenPageFragment(
-            offers,
-            onClickListener,
-            displayAllergens,
             position,
         )
 
-    /**
-     * Update the entire list of items
-     *
-     * @param items the new set of items
-     */
-    fun setNewItems(items: List<CanteenOfferGroup>, daysCovered: Int) {
-        // Update the count of days covered
-        this.daysCovered = daysCovered
-
-        // Update items
-        offers = items
-
-        // Force an update of the view. TODO replace with individual updates, as this is inefficient
+    fun setItemCount(newCount: Int) {
+        count = newCount
         notifyDataSetChanged()
     }
 }