[Refactor]: Directly call SearchContentsRepository interface in SearchViewModel

- Remove GetSearchContentsCountUseCase.
- Remove GetSearchContentsCountUseCase from SearchViewModel.
- Remove GetSearchContentsCountUseCase from SearchViewModelTest.

Fixes #1283

core/domain/src/main/kotlin/com/google/samples/apps/nowinandroid/core/domain/GetSearchContentsCountUseCase.kt

@@ -1,31 +0,0 @@
-/*
- * Copyright 2023 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.google.samples.apps.nowinandroid.core.domain
-
-import com.google.samples.apps.nowinandroid.core.data.repository.SearchContentsRepository
-import kotlinx.coroutines.flow.Flow
-import javax.inject.Inject
-
-/**
- * A use case which returns total count of *Fts tables
- */
-class GetSearchContentsCountUseCase @Inject constructor(
-    private val searchContentsRepository: SearchContentsRepository,
-) {
-    operator fun invoke(): Flow<Int> =
-        searchContentsRepository.getSearchContentsCount()
-}

feature/search/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/search/SearchViewModel.kt

@@ -23,8 +23,8 @@ import com.google.samples.apps.nowinandroid.core.analytics.AnalyticsEvent
 import com.google.samples.apps.nowinandroid.core.analytics.AnalyticsEvent.Param
 import com.google.samples.apps.nowinandroid.core.analytics.AnalyticsHelper
 import com.google.samples.apps.nowinandroid.core.data.repository.RecentSearchRepository
+import com.google.samples.apps.nowinandroid.core.data.repository.SearchContentsRepository
 import com.google.samples.apps.nowinandroid.core.domain.GetRecentSearchQueriesUseCase
-import com.google.samples.apps.nowinandroid.core.domain.GetSearchContentsCountUseCase
 import com.google.samples.apps.nowinandroid.core.domain.GetSearchContentsUseCase
 import com.google.samples.apps.nowinandroid.core.model.data.UserSearchResult
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -41,8 +41,8 @@ import javax.inject.Inject
 @HiltViewModel
 class SearchViewModel @Inject constructor(
     getSearchContentsUseCase: GetSearchContentsUseCase,
-    getSearchContentsCountUseCase: GetSearchContentsCountUseCase,
     recentSearchQueriesUseCase: GetRecentSearchQueriesUseCase,
+    private val searchContentsRepository: SearchContentsRepository,
     private val recentSearchRepository: RecentSearchRepository,
     private val savedStateHandle: SavedStateHandle,
     private val analyticsHelper: AnalyticsHelper,
@@ -51,7 +51,7 @@ class SearchViewModel @Inject constructor(
     val searchQuery = savedStateHandle.getStateFlow(key = SEARCH_QUERY, initialValue = "")
 
     val searchResultUiState: StateFlow<SearchResultUiState> =
-        getSearchContentsCountUseCase()
+        searchContentsRepository.getSearchContentsCount()
             .flatMapLatest { totalCount ->
                 if (totalCount < SEARCH_MIN_FTS_ENTITY_COUNT) {
                     flowOf(SearchResultUiState.SearchNotReady)

feature/search/src/test/kotlin/com/google/samples/apps/nowinandroid/feature/search/SearchViewModelTest.kt

@@ -19,7 +19,6 @@ package com.google.samples.apps.nowinandroid.feature.search
 import androidx.lifecycle.SavedStateHandle
 import com.google.samples.apps.nowinandroid.core.analytics.NoOpAnalyticsHelper
 import com.google.samples.apps.nowinandroid.core.domain.GetRecentSearchQueriesUseCase
-import com.google.samples.apps.nowinandroid.core.domain.GetSearchContentsCountUseCase
 import com.google.samples.apps.nowinandroid.core.domain.GetSearchContentsUseCase
 import com.google.samples.apps.nowinandroid.core.testing.data.newsResourcesTestData
 import com.google.samples.apps.nowinandroid.core.testing.data.topicsTestData
@@ -59,15 +58,14 @@ class SearchViewModelTest {
     )
     private val recentSearchRepository = TestRecentSearchRepository()
     private val getRecentQueryUseCase = GetRecentSearchQueriesUseCase(recentSearchRepository)
-    private val getSearchContentsCountUseCase = GetSearchContentsCountUseCase(searchContentsRepository)
     private lateinit var viewModel: SearchViewModel
 
     @Before
     fun setup() {
         viewModel = SearchViewModel(
             getSearchContentsUseCase = getSearchContentsUseCase,
-            getSearchContentsCountUseCase = getSearchContentsCountUseCase,
             recentSearchQueriesUseCase = getRecentQueryUseCase,
+            searchContentsRepository = searchContentsRepository,
             savedStateHandle = SavedStateHandle(),
             recentSearchRepository = recentSearchRepository,
             analyticsHelper = NoOpAnalyticsHelper(),
@@ -84,7 +82,8 @@ class SearchViewModelTest {
     fun stateIsEmptyQuery_withEmptySearchQuery() = runTest {
         searchContentsRepository.addNewsResources(newsResourcesTestData)
         searchContentsRepository.addTopics(topicsTestData)
-        val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
+        val collectJob =
+            launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
 
         viewModel.onSearchQueryChanged("")
 
@@ -95,7 +94,8 @@ class SearchViewModelTest {
 
     @Test
     fun emptyResultIsReturned_withNotMatchingQuery() = runTest {
-        val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
+        val collectJob =
+            launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
 
         viewModel.onSearchQueryChanged("XXX")
         searchContentsRepository.addNewsResources(newsResourcesTestData)
@@ -109,7 +109,8 @@ class SearchViewModelTest {
 
     @Test
     fun recentSearches_verifyUiStateIsSuccess() = runTest {
-        val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.recentSearchQueriesUiState.collect() }
+        val collectJob =
+            launch(UnconfinedTestDispatcher()) { viewModel.recentSearchQueriesUiState.collect() }
         viewModel.onSearchTriggered("kotlin")
 
         val result = viewModel.recentSearchQueriesUiState.value
@@ -120,7 +121,8 @@ class SearchViewModelTest {
 
     @Test
     fun searchNotReady_withNoFtsTableEntity() = runTest {
-        val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
+        val collectJob =
+            launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }
 
         viewModel.onSearchQueryChanged("")