ProductViewModel.kt

package com.rohitjakhar.sagarkhurana.viewmodel

import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import androidx.paging.Pager
import androidx.paging.PagingConfig
import androidx.paging.cachedIn
import com.google.firebase.auth.ktx.auth
import com.google.firebase.ktx.Firebase
import com.rohitjakhar.sagarkhurana.data.RemoteDataStore
import com.rohitjakhar.sagarkhurana.pagingdatasource.ProductFilterPaging
import com.rohitjakhar.sagarkhurana.pagingdatasource.ProductPagingSource
import com.rohitjakhar.sagarkhurana.utils.Constant.PRODUCT

class ProductViewModel : ViewModel() {

    private val mobile = Firebase.auth.currentUser?.phoneNumber
    private val db =
        RemoteDataStore.firebaseUserCollection.document( "00").collection(PRODUCT)

    private val dbFilter =
        RemoteDataStore.firebaseUserCollection.document(mobile ?: "00").collection(PRODUCT)
            .whereEqualTo("productId", "89427a4d-42e9-4da6-b735-27886c433225")

    val fetechAllData = Pager(PagingConfig(20)) {
        ProductPagingSource(db)
    }.flow.cachedIn(viewModelScope)

    val filterData = Pager(PagingConfig(20)) {
        ProductFilterPaging(dbFilter)
    }.flow.cachedIn(viewModelScope)
}