add "update single component" api to ComponentAdapter

Mariana-Tek · May 6, 2020 · 2f2bfad · 2f2bfad
1 parent 68c5d84
commit 2f2bfad
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diff --git a/example/src/main/java/com/seannajera/dkouple/MainActivity.kt b/example/src/main/java/com/seannajera/dkouple/MainActivity.kt
@@ -1,11 +1,16 @@
 package com.seannajera.dkouple
 
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
 import androidx.appcompat.app.AppCompatActivity
 import androidx.recyclerview.widget.RecyclerView
 
 class MainActivity : AppCompatActivity() {
 
+    private val tag = "Dkouple_MainActivity"
+
     private val componentFactory: ComponentFactory = MainComponentFactory()
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -22,5 +27,20 @@ class MainActivity : AppCompatActivity() {
                 ItemComponent("1", "First Item")
             )
         )
+
+        Handler(Looper.getMainLooper()).postDelayed({
+
+            val firstItemUpdated = componentAdapter.updateComponent(
+                ItemComponent("1", "Still First Item")
+            )
+
+            val nonExistentItemUpdated = componentAdapter.updateComponent(
+                ItemComponent("2", "I am not in the components")
+            )
+
+            Log.i(tag, "First item was updated: $firstItemUpdated") // "First item was updated: true"
+            Log.i(tag, "Non existent item was updated: $nonExistentItemUpdated") // "Non existent item was updated: false"
+
+        }, 5000)
     }
 }
diff --git a/library/src/main/java/com/seannajera/dkouple/ComponentAdapter.kt b/library/src/main/java/com/seannajera/dkouple/ComponentAdapter.kt
@@ -61,6 +61,23 @@ class ComponentAdapter(private val componentFactory: ComponentFactory) :
 
     fun applyComponents(components: List<Component>) = submitList(components)
 
+    fun updateComponent(component: Component): Boolean {
+        var isComponentInList = false
+
+        val updatedComponentList = currentList.map {
+            if (it.id == component.id) {
+                isComponentInList = true
+                return@map component
+            } else {
+                return@map it
+            }
+        }
+
+        if (isComponentInList) submitList(updatedComponentList)
+
+        return isComponentInList
+    }
+
     companion object {
         val componentDiffer = object : DiffUtil.ItemCallback<Component>() {
             override fun areItemsTheSame(