/*
 * Copyright 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.codelabs.paging

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import androidx.savedstate.SavedStateRegistryOwner
import com.example.android.codelabs.paging.data.ArticleRepository
import com.example.android.codelabs.paging.ui.ViewModelFactory

/**
 * Class that handles object creation.
 * Like this, objects can be passed as parameters in the constructors and then replaced for
 * testing, where needed.
 */
object Injection {

    /**
     * Creates an instance of [ArticleRepository]
     */
    private fun provideArticleRepository(): ArticleRepository = ArticleRepository()

    /**
     * Provides the [ViewModelProvider.Factory] that is then used to get a reference to
     * [ViewModel] objects.
     */
    fun provideViewModelFactory(owner: SavedStateRegistryOwner): ViewModelProvider.Factory {
        return ViewModelFactory(owner, provideArticleRepository())
    }
}
