Initialize RecipesFragment

app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt

@@ -9,6 +9,7 @@ import android.widget.Toast
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.findNavController
 import com.google.android.material.textfield.TextInputLayout
 import dagger.hilt.android.AndroidEntryPoint
 import gq.kirmanak.mealie.databinding.FragmentAuthenticationBinding
@@ -46,6 +47,7 @@ class AuthenticationFragment : Fragment() {
     private fun checkIfAuthenticatedAlready() {
         Timber.v("checkIfAuthenticatedAlready() called")
         lifecycleScope.launchWhenCreated {
+            if (viewModel.isAuthenticated()) navigateToRecipes()
             Toast.makeText(
                 requireContext(),
                 if (viewModel.isAuthenticated()) "User is authenticated"
@@ -55,6 +57,10 @@ class AuthenticationFragment : Fragment() {
         }
     }
 
+    private fun navigateToRecipes() {
+        findNavController().navigate(AuthenticationFragmentDirections.actionAuthenticationFragmentToRecipesFragment())
+    }
+
     private fun onLoginClicked() {
         Timber.v("onLoginClicked() called")
         val email: String
@@ -73,6 +79,7 @@ class AuthenticationFragment : Fragment() {
         }
         lifecycleScope.launchWhenResumed {
             val exception = viewModel.authenticate(email, pass, url)
+            if (exception == null) navigateToRecipes()
             Toast.makeText(
                 requireContext(),
                 "Exception is ${exception?.message ?: "null"}",

app/src/main/java/gq/kirmanak/mealie/ui/recipes/RecipeViewModel.kt

@@ -0,0 +1,18 @@
+package gq.kirmanak.mealie.ui.recipes
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.Pager
+import androidx.paging.PagingData
+import androidx.paging.cachedIn
+import dagger.hilt.android.lifecycle.HiltViewModel
+import gq.kirmanak.mealie.data.recipes.RecipeRepo
+import gq.kirmanak.mealie.data.recipes.db.RecipeEntity
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+@HiltViewModel
+class RecipeViewModel @Inject constructor(private val recipeRepo: RecipeRepo) : ViewModel() {
+    private val pager: Pager<Int, RecipeEntity> by lazy { recipeRepo.createPager() }
+    val recipeFlow: Flow<PagingData<RecipeEntity>> by lazy { pager.flow.cachedIn(viewModelScope) }
+}

app/src/main/java/gq/kirmanak/mealie/ui/recipes/RecipesFragment.kt

@@ -0,0 +1,47 @@
+package gq.kirmanak.mealie.ui.recipes
+
+import android.os.Bundle
+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.lifecycleScope
+import androidx.recyclerview.widget.LinearLayoutManager
+import dagger.hilt.android.AndroidEntryPoint
+import gq.kirmanak.mealie.databinding.FragmentRecipesBinding
+import kotlinx.coroutines.flow.collectLatest
+
+@AndroidEntryPoint
+class RecipesFragment : Fragment() {
+    private var _binding: FragmentRecipesBinding? = null
+    private val binding: FragmentRecipesBinding
+        get() = checkNotNull(_binding) { "Binding requested when fragment is off screen" }
+    private val viewModel by viewModels<RecipeViewModel>()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentRecipesBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.recipes.layoutManager = LinearLayoutManager(requireContext())
+        val recipesPagingAdapter = RecipesPagingAdapter()
+        binding.recipes.adapter = recipesPagingAdapter
+        lifecycleScope.launchWhenResumed {
+            viewModel.recipeFlow.collectLatest {
+                recipesPagingAdapter.submitData(it)
+            }
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

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

@@ -0,0 +1,41 @@
+package gq.kirmanak.mealie.ui.recipes
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.paging.PagingDataAdapter
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import gq.kirmanak.mealie.data.recipes.db.RecipeEntity
+import gq.kirmanak.mealie.databinding.ViewHolderRecipeBinding
+import timber.log.Timber
+
+class RecipesPagingAdapter : PagingDataAdapter<RecipeEntity, RecipeViewHolder>(RecipeDiffCallback) {
+    override fun onBindViewHolder(holder: RecipeViewHolder, position: Int) {
+        val item = getItem(position)
+        holder.bind(item)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecipeViewHolder {
+        Timber.v("onCreateViewHolder() called with: parent = $parent, viewType = $viewType")
+        val inflater = LayoutInflater.from(parent.context)
+        val binding = ViewHolderRecipeBinding.inflate(inflater, parent, false)
+        return RecipeViewHolder(binding)
+    }
+}
+
+class RecipeViewHolder(private val binding: ViewHolderRecipeBinding) :
+    RecyclerView.ViewHolder(binding.root) {
+    fun bind(item: RecipeEntity?) {
+        binding.name.text = item?.name
+    }
+}
+
+private object RecipeDiffCallback : DiffUtil.ItemCallback<RecipeEntity>() {
+    override fun areItemsTheSame(oldItem: RecipeEntity, newItem: RecipeEntity): Boolean {
+        return oldItem.localId == newItem.localId
+    }
+
+    override fun areContentsTheSame(oldItem: RecipeEntity, newItem: RecipeEntity): Boolean {
+        return oldItem == newItem
+    }
+}