Android-Developer-Basic · Radaana · Jan 25, 2025
diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/CookbookAdapter.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/CookbookAdapter.kt
@@ -0,0 +1,69 @@
+package ru.otus.cookbook.ui
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import ru.otus.cookbook.R
+import ru.otus.cookbook.data.RecipeListItem
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+
+
+class CookbookAdapter(
+    private val listener: Listener
+) : ListAdapter<RecipeListItem, RecyclerView.ViewHolder>(DiffUtilItem()) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        return when (viewType) {
+            RecipeListItem.RecipeItem.layoutId -> {
+                val view = LayoutInflater.from(parent.context)
+                    .inflate(R.layout.vh_recipe_item, parent, false)
+                RecipeViewHolder(view, listener)
+            }
+
+            RecipeListItem.CategoryItem.layoutId -> {
+                val view = LayoutInflater.from(parent.context)
+                    .inflate(R.layout.vh_recipe_category, parent, false)
+                CategoryViewHolder(view)
+            }
+
+            else -> throw IllegalArgumentException("Not found view type for chat adapter")
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is RecipeViewHolder -> holder.bind(getItem(position) as RecipeListItem.RecipeItem)
+            is CategoryViewHolder -> holder.bind(getItem(position) as RecipeListItem.CategoryItem)
+        }
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return when (currentList[position]) {
+            is RecipeListItem.RecipeItem -> RecipeListItem.RecipeItem.layoutId
+            is RecipeListItem.CategoryItem -> RecipeListItem.CategoryItem.layoutId
+            else -> -1
+        }
+    }
+}
+
+class DiffUtilItem : DiffUtil.ItemCallback<RecipeListItem>() {
+    override fun areItemsTheSame(oldItem: RecipeListItem, newItem: RecipeListItem): Boolean {
+        if (oldItem::class != newItem::class) return false
+
+        return when {
+            oldItem is RecipeListItem.CategoryItem && newItem is RecipeListItem.CategoryItem -> oldItem.name == newItem.name
+            oldItem is RecipeListItem.RecipeItem && newItem is RecipeListItem.RecipeItem -> oldItem.id == newItem.id
+            else -> false
+        }
+    }
+
+    override fun areContentsTheSame(oldItem: RecipeListItem, newItem: RecipeListItem): Boolean {
+        return when {
+            oldItem is RecipeListItem.CategoryItem && newItem is RecipeListItem.CategoryItem -> oldItem.name == newItem.name
+            oldItem is RecipeListItem.RecipeItem && newItem is RecipeListItem.RecipeItem -> oldItem.title == newItem.title && oldItem.description == newItem.description && oldItem.imageUrl == newItem.imageUrl
+            else -> false
+        }
+    }
+
+}
diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/CookbookFragment.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/CookbookFragment.kt
@@ -1,21 +1,25 @@
 package ru.otus.cookbook.ui
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.flowWithLifecycle
 import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.findNavController
 import kotlinx.coroutines.launch
+import ru.otus.cookbook.R
 import ru.otus.cookbook.data.RecipeListItem
 import ru.otus.cookbook.databinding.FragmentCookbookBinding
 
-class CookbookFragment : Fragment() {
+class CookbookFragment : Fragment(), Listener {
 
     private val binding = FragmentBindingDelegate<FragmentCookbookBinding>(this)
     private val model: CookbookFragmentViewModel by viewModels { CookbookFragmentViewModel.Factory }
+    private val adapter: CookbookAdapter by lazy { CookbookAdapter(this) }
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -37,10 +41,17 @@ class CookbookFragment : Fragment() {
     }
 
     private fun setupRecyclerView() = binding.withBinding {
-        // Setup RecyclerView
+        cookbook.adapter = adapter
+
     }
 
     private fun onRecipeListUpdated(recipeList: List<RecipeListItem>) {
-        // Handle recipe list
+        adapter.submitList(recipeList)
+    }
+
+    override fun onItemClicked(id: Int) {
+        Log.d("onItemClicked", id.toString())
+        val action = CookbookFragmentDirections.actionCookbookFragmentToRecipeFragment(id)
+        findNavController().navigate(action)
     }
 }
diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/DeleteDialogFragment.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/DeleteDialogFragment.kt
@@ -0,0 +1,44 @@
+package ru.otus.cookbook.ui
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.fragment.app.DialogFragment
+import androidx.navigation.fragment.findNavController
+import ru.otus.cookbook.R
+
+
+class DeleteDialogFragment : DialogFragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_delete_dialog, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val dialogText = view.findViewById<TextView>(R.id.dialogText)
+
+        dialogText.text = getString(
+            R.string.are_you_sure_you_wand_to_delete,
+            DeleteDialogFragmentArgs.fromBundle(requireArguments()).title
+        )
+        view.findViewById<TextView>(R.id.ok).setOnClickListener {
+            val navController = findNavController()
+            navController.previousBackStackEntry?.savedStateHandle?.set(CONFIRMATION_RESULT, true)
+            navController.popBackStack()
+        }
+        view.findViewById<TextView>(R.id.cancel).setOnClickListener {
+            findNavController().popBackStack()
+        }
+    }
+
+    companion object {
+        const val CONFIRMATION_RESULT = "result"
+    }
+}
diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/Listener.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/Listener.kt
@@ -0,0 +1,5 @@
+package ru.otus.cookbook.ui
+
+interface Listener {
+    fun onItemClicked(id: Int)
+}
diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/RecipeFragment.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/RecipeFragment.kt
@@ -6,16 +6,22 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.flowWithLifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.viewmodel.MutableCreationExtras
+import androidx.navigation.fragment.findNavController
 import kotlinx.coroutines.launch
+import ru.otus.cookbook.R
 import ru.otus.cookbook.data.Recipe
 import ru.otus.cookbook.databinding.FragmentRecipeBinding
 
 class RecipeFragment : Fragment() {
 
-    private val recipeId: Int get() = TODO("Use Safe Args to get the recipe ID: https://developer.android.com/guide/navigation/use-graph/pass-data#Safe-args")
+    private val recipeId: Int get() = RecipeFragmentArgs.fromBundle(requireArguments()).recipeId
 
     private val binding = FragmentBindingDelegate<FragmentRecipeBinding>(this)
     private val model: RecipeFragmentViewModel by viewModels(
@@ -43,6 +49,42 @@ class RecipeFragment : Fragment() {
                 .flowWithLifecycle(viewLifecycleOwner.lifecycle)
                 .collect(::displayRecipe)
         }
+        binding.withBinding {
+            recipeMenuBar.setNavigationOnClickListener {
+                findNavController().popBackStack()
+            }
+            recipeMenuBar.setOnMenuItemClickListener { item ->
+                when (item.itemId) {
+                    R.id.delete -> {
+                        val action = RecipeFragmentDirections.actionRecipeFragmentToDeleteDialogFragment(getTitle())
+                        findNavController().navigate(action)
+                        true
+                    }
+                    else -> false
+                }
+            }
+        }
+
+        val navBackStackEntry = findNavController().getBackStackEntry(R.id.recipeFragment)
+
+        val observer = LifecycleEventObserver { _, event ->
+            if (event == Lifecycle.Event.ON_RESUME
+                && navBackStackEntry.savedStateHandle.contains(DeleteDialogFragment.CONFIRMATION_RESULT)) {
+                val isConfirmed = navBackStackEntry.savedStateHandle.get<Boolean>(DeleteDialogFragment.CONFIRMATION_RESULT) ?: false;
+                if (isConfirmed) {
+                    deleteRecipe()
+                    findNavController().popBackStack()
+                }
+            }
+        }
+
+        navBackStackEntry.lifecycle.addObserver(observer)
+
+        viewLifecycleOwner.lifecycle.addObserver(LifecycleEventObserver { _, event ->
+            if (event == Lifecycle.Event.ON_DESTROY) {
+                navBackStackEntry.lifecycle.removeObserver(observer)
+            }
+        })
     }
 
     /**
@@ -52,8 +94,10 @@ class RecipeFragment : Fragment() {
         return model.recipe.value.title
     }
 
-    private fun displayRecipe(recipe: Recipe) {
-        // Display the recipe
+    private fun displayRecipe(recipe: Recipe) = binding.withBinding {
+        title.text = recipe.title
+        desc.text = recipe.description
+        steps.text = recipe.steps.joinToString("\n")
     }
 
     private fun deleteRecipe() {

diff --git a/app/src/main/kotlin/ru/otus/cookbook/ui/RecipeViewHolder.kt b/app/src/main/kotlin/ru/otus/cookbook/ui/RecipeViewHolder.kt
@@ -0,0 +1,35 @@
+package ru.otus.cookbook.ui
+
+import android.view.View
+import android.widget.TextView
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.recyclerview.widget.RecyclerView
+import ru.otus.cookbook.R
+import ru.otus.cookbook.data.RecipeListItem
+
+class RecipeViewHolder (
+    private val view: View,
+    private val listener: Listener,
+) : RecyclerView.ViewHolder(view) {
+    private val root: ConstraintLayout by lazy { view.findViewById(R.id.recipeItem) }
+    private val letter: TextView by lazy { view.findViewById(R.id.letter) }
+    private val title: TextView by lazy { view.findViewById(R.id.recipeTitle) }
+    private val desc: TextView by lazy { view.findViewById(R.id.recipeDesc) }
+
+    fun bind(item: RecipeListItem.RecipeItem) {
+        letter.text = item.title.substring(0, 1)
+        title.text = item.title
+        desc.text = item.description
+        root.setOnClickListener { listener.onItemClicked(item.id) }
+    }
+}
+
+class CategoryViewHolder (
+    private val view: View,
+) : RecyclerView.ViewHolder(view) {
+    private val title: TextView by lazy { view.findViewById(R.id.categoryTitle) }
+
+    fun bind(item: RecipeListItem.CategoryItem) {
+        title.text = item.name
+    }
+}
diff --git a/app/src/main/res/drawable/arrow_back_24px.xml b/app/src/main/res/drawable/arrow_back_24px.xml
@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal"
+    android:autoMirrored="true">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M313,520L537,744L480,800L160,480L480,160L537,216L313,440L800,440L800,520L313,520Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/delete_24px.xml b/app/src/main/res/drawable/delete_24px.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M280,840Q247,840 223.5,816.5Q200,793 200,760L200,240L160,240L160,160L360,160L360,120L600,120L600,160L800,160L800,240L760,240L760,760Q760,793 736.5,816.5Q713,840 680,840L280,840ZM680,240L280,240L280,760Q280,760 280,760Q280,760 280,760L680,760Q680,760 680,760Q680,760 680,760L680,240ZM360,680L440,680L440,320L360,320L360,680ZM520,680L600,680L600,320L520,320L520,680ZM280,240L280,240L280,760Q280,760 280,760Q280,760 280,760L280,760Q280,760 280,760Q280,760 280,760L280,240Z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
@@ -1,19 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     tools:context=".MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/cookbook"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:defaultNavHost="true"
+        app:navGraph="@navigation/navigation"/>
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_cookbook.xml b/app/src/main/res/layout/fragment_cookbook.xml
@@ -1,6 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_height="match_parent">
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/cookbook"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+        tools:listitem="@layout/vh_recipe_item"
+        android:background="@color/white"
+        tools:itemCount="5" />
+</LinearLayout>