Promo_one.kt

class Promo_one : AppCompatActivity() {

    private val promoOnedb = FirebaseFirestore.getInstance()
    private val promoOneRef: CollectionReference = promoOnedb.collection("tops")
        .document("promotions")
        .collection("tops_national")
    private val promoOneRefTwo: CollectionReference = promoOnedb.collection("tops")
        .document("promotions")
        .collection("blue_bottle")
    //TODO Jy gaan die so doen: Jy gaan dat hy hier bo 'n DocumentReference maak

    //private DocumentReference oneRef = promo_oneRef.document("promo");
    private val ACTIVITY_NUM = 2

    private var promo_one_adapter: PromoOneRecyclerAdapter? = null

    private val TAG = "Blue_bottle"


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_promo_one)
        setUpPromoOneRecyclerView()
        //setupBottomNavigationView();
        title = "Promo One Going"
    }


    private fun setUpPromoOneRecyclerView() {


        //val query = promoOneRef.whereEqualTo("department", "3")
        //val query2 = promoOneRefTwo.whereEqualTo("department", "3")
        //TODO Dan gaan jy hier die query reg maak.

        val task1: Task<*> = promoOneRef.whereEqualTo("department", 3)
            .orderBy("product")
            .get()
        val task2: Task<*> = promoOneRefTwo.whereEqualTo("department", 3)
            .orderBy("product")
            .get()

        val allTasks = Tasks.whenAllSuccess<QuerySnapshot>(task1, task2)


        val options: FirestoreRecyclerOptions<promo_one_data> =
            FirestoreRecyclerOptions.Builder<promo_one_data>().setQuery(
                allTasks, promo_one_data::class.java
            ).build()
        promo_one_adapter = PromoOneRecyclerAdapter(options)
        val promo_one_recyclerView = findViewById<RecyclerView>(R.id.recycler_view_promo_one)
        //recyclerView.setHasFixedSize(true);
        promo_one_recyclerView.layoutManager = LinearLayoutManager(this)
        promo_one_recyclerView.adapter = promo_one_adapter
    }


    override fun onStart() {
        super.onStart()
        promo_one_adapter?.startListening()
    }

    override fun onStop() {
        super.onStop()
        promo_one_adapter?.stopListening()
    }

}