ProductFragment.kt

package com.rohitjakhar.sagarkhurana.ui.product

import android.content.Intent
import android.os.Bundle
import android.view.*
import androidx.fragment.app.Fragment
import androidx.fragment.app.viewModels
import androidx.lifecycle.lifecycleScope
import androidx.navigation.fragment.findNavController
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import com.google.firebase.auth.ktx.auth
import com.google.firebase.ktx.Firebase
import com.rohitjakhar.sagarkhurana.R
import com.rohitjakhar.sagarkhurana.adapter.ProductAdapter
import com.rohitjakhar.sagarkhurana.databinding.FragmentProductBinding
import com.rohitjakhar.sagarkhurana.ui.auth.AuthActivity
import com.rohitjakhar.sagarkhurana.utils.Helper.dLog
import com.rohitjakhar.sagarkhurana.viewmodel.ProductViewModel
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.flow.filter
import kotlinx.coroutines.launch

class ProductFragment : Fragment() {

    private var _binding: FragmentProductBinding? = null
    private val binding get() = _binding!!
    private val mAdapter = ProductAdapter()
    private val productViewModel by viewModels<ProductViewModel>()

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = FragmentProductBinding.inflate(inflater, container, false)

        setHasOptionsMenu(true)

        binding.rvProduc.apply {
            setHasFixedSize(true)
            layoutManager = LinearLayoutManager(requireContext())
            adapter = mAdapter
            addItemDecoration(
                DividerItemDecoration(
                    requireContext(),
                    DividerItemDecoration.HORIZONTAL
                )
            )
        }

        lifecycleScope.launch {
            productViewModel.fetechAllData.collect {
                mAdapter.submitData(it)
            }
        }

        binding.filterLayout.setOnClickListener {
            dLog("clicked")
            mAdapter.refresh()
            lifecycleScope.launch {
                productViewModel.filterData.collect {
                    mAdapter.submitData(it)
                   dLog(it.toString())
                }
                mAdapter.notifyDataSetChanged()
            }
        }
        binding.imgBtnAddProduct.setOnClickListener {
            val ac = ProductFragmentDirections.actionNavProductFragmentToAddProductFragment()
            findNavController().navigate(ac)
        }
        return binding.root
    }

    override fun onDestroy() {
        _binding = null
        super.onDestroy()
    }

    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        inflater.inflate(R.menu.top_menu, menu)
        super.onCreateOptionsMenu(menu, inflater)
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        if (item.itemId == R.id.nav_log_out) {
            try {
                dLog("user Logout")
                Firebase.auth.signOut()
                startActivity(
                    Intent(requireActivity(), AuthActivity::class.java).apply {
                        this.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                    }
                )
                requireActivity().finish()
            } catch (e: Exception) {
                dLog("error logout: ${e.message}")
            }
        }
        return true
    }
}