feat: add in cart total text to bottom nav button (#38)

Author: mchuangatmp

core-sdk-samples/higgs-shop-sample-app/app/src/main/kotlin/com/mparticle/example/higgsshopsampleapp/activities/MainActivity.kt

@@ -2,6 +2,7 @@ package com.mparticle.example.higgsshopsampleapp.activities
 
 import android.content.Intent
 import android.os.Bundle
+import android.view.MenuItem
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
@@ -15,6 +16,7 @@ import com.mparticle.MParticle
 import com.mparticle.example.higgsshopsampleapp.R
 import com.mparticle.example.higgsshopsampleapp.databinding.ActivityMainBinding
 import com.mparticle.example.higgsshopsampleapp.utils.Constants
+import com.mparticle.example.higgsshopsampleapp.viewmodels.CartViewModel
 
 
 class MainActivity : AppCompatActivity() {
@@ -83,4 +85,13 @@ class MainActivity : AppCompatActivity() {
     fun setActionBarTitle(title: String?) {
         getSupportActionBar()?.setTitle(title)
     }
+
+    fun updateBottomNavCartButtonText(size: Int) {
+        val bottomNavigation: BottomNavigationView = findViewById(R.id.bottom_nav)
+        val item: MenuItem = bottomNavigation.menu.findItem(R.id.navigation_cart)
+        when(size) {
+            0 -> item.title = getString(R.string.nav_cart)
+            else -> item.title = getString(R.string.nav_cart) + " (${size})"
+        }
+    }
 }

core-sdk-samples/higgs-shop-sample-app/app/src/main/kotlin/com/mparticle/example/higgsshopsampleapp/fragments/CartFragment.kt

@@ -52,6 +52,12 @@ class CartFragment : Fragment() {
                 _binding?.tvCartSubtotalPrice?.text = "$${subTotalPrice}"
             })
 
+        cartViewModel.cartTotalLiveData.observe(
+            viewLifecycleOwner,
+            { total ->
+                (activity as MainActivity).updateBottomNavCartButtonText(total)
+            })
+
         cartViewModel.cartResponseLiveData.observe(viewLifecycleOwner, Observer { items ->
             Log.d(TAG, "Size: " + items?.size)
 
@@ -61,13 +67,15 @@ class CartFragment : Fragment() {
                 _binding?.tvCartSubtotalPrice?.text = getString(R.string.detail_price)
                 btnCTA.isClickable = false
                 btnCTA.alpha = 0.3F
+                (activity as MainActivity).updateBottomNavCartButtonText(0)
                 return@Observer
             }
             btnCTA.setBackgroundResource(R.drawable.rounded_button)
             _binding?.tvCart0?.visibility = View.GONE
             _binding?.rvCartList?.visibility = View.VISIBLE
             val adapter = CartItemsAdapter()
             adapter.list = items.toMutableList()
+            cartViewModel.getTotalCartItems(this.requireContext())
 
             _binding?.rvCartList?.let { listView ->
                 if (listView.adapter == null) {

core-sdk-samples/higgs-shop-sample-app/app/src/main/kotlin/com/mparticle/example/higgsshopsampleapp/fragments/ShopFragment.kt

@@ -78,5 +78,20 @@ class ShopFragment : Fragment() {
             }
         })
         shopViewModel.getProducts(this.requireContext())
+
+        shopViewModel.cartTotalSizeResponseLiveData.observe(viewLifecycleOwner, Observer { total ->
+            Log.d(TAG, "Total: " + total)
+
+            if (total == null || total == 0) {
+                (activity as MainActivity).updateBottomNavCartButtonText(0)
+                return@Observer
+            }
+            (activity as MainActivity).updateBottomNavCartButtonText(total)
+        })
+    }
+
+    override fun onResume() {
+        super.onResume()
+        shopViewModel.getTotalCartItems(this.requireContext())
     }
 }

core-sdk-samples/higgs-shop-sample-app/app/src/main/kotlin/com/mparticle/example/higgsshopsampleapp/viewmodels/CartViewModel.kt

@@ -18,6 +18,7 @@ import java.math.BigDecimal
 class CartViewModel : ViewModel() {
     val cartResponseLiveData = MutableLiveData<List<CartItemEntity>>()
     val cartSubtotalPriceLiveData = MutableLiveData<BigDecimal>()
+    val cartTotalLiveData = MutableLiveData<Int>()
     private val cartRepository = CartRepository()
     private val TAG = "CartViewModel"
 
@@ -27,6 +28,17 @@ class CartViewModel : ViewModel() {
         }
     }
 
+    fun getTotalCartItems(context: Context) {
+        viewModelScope.launch {
+            val items = cartRepository.getCartItems(context)
+            var total = 0
+            items.forEach {
+                total += it.quantity
+            }
+            cartTotalLiveData.value = total
+        }
+    }
+
     fun getSubtotalPrice(context: Context) {
         viewModelScope.launch {
             val items = cartRepository.getCartItems(context)

core-sdk-samples/higgs-shop-sample-app/app/src/main/kotlin/com/mparticle/example/higgsshopsampleapp/viewmodels/ShopViewModel.kt

@@ -4,14 +4,18 @@ import android.content.Context
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.mparticle.example.higgsshopsampleapp.repositories.CartRepository
 import com.mparticle.example.higgsshopsampleapp.repositories.ProductsRepository
 import com.mparticle.example.higgsshopsampleapp.repositories.network.models.Product
 import kotlinx.coroutines.launch
 
 class ShopViewModel() : ViewModel() {
-    val inventoryResponseLiveData = MutableLiveData<List<Product>>()
     private val TAG = "ProductsViewModel"
 
+    val inventoryResponseLiveData = MutableLiveData<List<Product>>()
+    val cartTotalSizeResponseLiveData = MutableLiveData<Int>()
+
+    private val cartRepository = CartRepository()
     private val repository = ProductsRepository()
 
     fun getProducts (context: Context) {
@@ -20,8 +24,14 @@ class ShopViewModel() : ViewModel() {
         }
     }
 
-    override fun onCleared() {
-        super.onCleared()
-        //repository.cancelCoroutinesJob()
+    fun getTotalCartItems(context: Context) {
+        viewModelScope.launch {
+            val items = cartRepository.getCartItems(context)
+            var total = 0
+            items.forEach {
+                total += it.quantity
+            }
+            cartTotalSizeResponseLiveData.value = total
+        }
     }
 }