Update favorite status on icon click

app/src/main/java/gq/kirmanak/mealient/ui/recipes/RecipeViewHolder.kt

@@ -3,6 +3,7 @@ package gq.kirmanak.mealient.ui.recipes
 import android.view.View
 import androidx.annotation.StringRes
 import androidx.recyclerview.widget.RecyclerView
+import dagger.hilt.android.scopes.FragmentScoped
 import gq.kirmanak.mealient.R
 import gq.kirmanak.mealient.database.recipe.entity.RecipeSummaryEntity
 import gq.kirmanak.mealient.databinding.ViewHolderRecipeBinding
@@ -10,28 +11,41 @@ import gq.kirmanak.mealient.extensions.resources
 import gq.kirmanak.mealient.logging.Logger
 import gq.kirmanak.mealient.ui.recipes.images.RecipeImageLoader
 import javax.inject.Inject
-import javax.inject.Singleton
 
 class RecipeViewHolder private constructor(
     private val logger: Logger,
     private val binding: ViewHolderRecipeBinding,
     private val recipeImageLoader: RecipeImageLoader,
-    private val clickListener: (RecipeSummaryEntity) -> Unit,
+    private val clickListener: (ClickEvent) -> Unit,
 ) : RecyclerView.ViewHolder(binding.root) {
 
-    @Singleton
+    @FragmentScoped
     class Factory @Inject constructor(
+        private val recipeImageLoader: RecipeImageLoader,
         private val logger: Logger,
     ) {
 
         fun build(
-            recipeImageLoader: RecipeImageLoader,
             binding: ViewHolderRecipeBinding,
-            clickListener: (RecipeSummaryEntity) -> Unit,
+            clickListener: (ClickEvent) -> Unit,
         ) = RecipeViewHolder(logger, binding, recipeImageLoader, clickListener)
 
     }
 
+    sealed class ClickEvent {
+
+        abstract val recipeSummaryEntity: RecipeSummaryEntity
+
+        data class FavoriteClick(
+            override val recipeSummaryEntity: RecipeSummaryEntity
+        ) : ClickEvent()
+
+        data class RecipeClick(
+            override val recipeSummaryEntity: RecipeSummaryEntity
+        ) : ClickEvent()
+
+    }
+
     private val loadingPlaceholder by lazy {
         binding.resources.getString(R.string.view_holder_recipe_text_placeholder)
     }
@@ -43,7 +57,10 @@ class RecipeViewHolder private constructor(
         item?.let { entity ->
             binding.root.setOnClickListener {
                 logger.d { "bind: item clicked $entity" }
-                clickListener(entity)
+                clickListener(ClickEvent.RecipeClick(entity))
+            }
+            binding.favoriteIcon.setOnClickListener {
+                clickListener(ClickEvent.FavoriteClick(entity))
             }
             binding.favoriteIcon.setImageResource(
                 if (item.isFavorite) {

app/src/main/java/gq/kirmanak/mealient/ui/recipes/RecipesListFragment.kt

@@ -90,7 +90,16 @@ class RecipesListFragment : Fragment(R.layout.fragment_recipes_list) {
     private fun setupRecipeAdapter() {
         logger.v { "setupRecipeAdapter() called" }
 
-        val recipesAdapter = recipePagingAdapterFactory.build { onRecipeClicked(it) }
+        val recipesAdapter = recipePagingAdapterFactory.build {
+            when (it) {
+                is RecipeViewHolder.ClickEvent.FavoriteClick -> {
+                    viewModel.onFavoriteIconClick(it.recipeSummaryEntity)
+                }
+                is RecipeViewHolder.ClickEvent.RecipeClick -> {
+                    onRecipeClicked(it.recipeSummaryEntity)
+                }
+            }
+        }
 
         with(binding.recipes) {
             adapter = recipesAdapter

app/src/main/java/gq/kirmanak/mealient/ui/recipes/RecipesListViewModel.kt

@@ -8,10 +8,12 @@ import androidx.paging.cachedIn
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.data.auth.AuthRepo
 import gq.kirmanak.mealient.data.recipes.RecipeRepo
+import gq.kirmanak.mealient.database.recipe.entity.RecipeSummaryEntity
 import gq.kirmanak.mealient.extensions.valueUpdatesOnly
 import gq.kirmanak.mealient.logging.Logger
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltViewModel
@@ -38,4 +40,15 @@ class RecipesListViewModel @Inject constructor(
             emit(result)
         }
     }
+
+    fun onFavoriteIconClick(recipeSummaryEntity: RecipeSummaryEntity) {
+        logger.v { "onFavoriteIconClick() called with: recipeSummaryEntity = $recipeSummaryEntity" }
+        viewModelScope.launch {
+            if (recipeSummaryEntity.isFavorite) {
+                recipeRepo.removeFavoriteRecipe(recipeSummaryEntity.slug)
+            } else {
+                recipeRepo.addFavoriteRecipe(recipeSummaryEntity.slug)
+            }
+        }
+    }
 }

app/src/main/java/gq/kirmanak/mealient/ui/recipes/RecipesPagingAdapter.kt

@@ -8,28 +8,22 @@ import dagger.hilt.android.scopes.FragmentScoped
 import gq.kirmanak.mealient.database.recipe.entity.RecipeSummaryEntity
 import gq.kirmanak.mealient.databinding.ViewHolderRecipeBinding
 import gq.kirmanak.mealient.logging.Logger
-import gq.kirmanak.mealient.ui.recipes.images.RecipeImageLoader
 import javax.inject.Inject
 
 class RecipesPagingAdapter private constructor(
     private val logger: Logger,
-    private val recipeImageLoader: RecipeImageLoader,
     private val recipeViewHolderFactory: RecipeViewHolder.Factory,
-    private val clickListener: (RecipeSummaryEntity) -> Unit
+    private val clickListener: (RecipeViewHolder.ClickEvent) -> Unit
 ) : PagingDataAdapter<RecipeSummaryEntity, RecipeViewHolder>(RecipeDiffCallback) {
 
     @FragmentScoped
     class Factory @Inject constructor(
         private val logger: Logger,
         private val recipeViewHolderFactory: RecipeViewHolder.Factory,
-        private val recipeImageLoader: RecipeImageLoader,
     ) {
 
-        fun build(clickListener: (RecipeSummaryEntity) -> Unit) = RecipesPagingAdapter(
-            logger,
-            recipeImageLoader,
-            recipeViewHolderFactory,
-            clickListener
+        fun build(clickListener: (RecipeViewHolder.ClickEvent) -> Unit) = RecipesPagingAdapter(
+            logger, recipeViewHolderFactory, clickListener
         )
     }
 
@@ -43,18 +37,16 @@ class RecipesPagingAdapter private constructor(
         logger.v { "onCreateViewHolder() called with: parent = $parent, viewType = $viewType" }
         val inflater = LayoutInflater.from(parent.context)
         val binding = ViewHolderRecipeBinding.inflate(inflater, parent, false)
-        return recipeViewHolderFactory.build(recipeImageLoader, binding, clickListener)
+        return recipeViewHolderFactory.build(binding, clickListener)
     }
 
     private object RecipeDiffCallback : DiffUtil.ItemCallback<RecipeSummaryEntity>() {
         override fun areItemsTheSame(
-            oldItem: RecipeSummaryEntity,
-            newItem: RecipeSummaryEntity
+            oldItem: RecipeSummaryEntity, newItem: RecipeSummaryEntity
         ): Boolean = oldItem.remoteId == newItem.remoteId
 
         override fun areContentsTheSame(
-            oldItem: RecipeSummaryEntity,
-            newItem: RecipeSummaryEntity
+            oldItem: RecipeSummaryEntity, newItem: RecipeSummaryEntity
         ): Boolean = oldItem.name == newItem.name && oldItem.slug == newItem.slug
     }
 }