feat(home): 홈 추천 ViewModel을 추가한다

app/src/main/java/kr/co/vividnext/sodalive/di/AppDI.kt

@@ -177,6 +177,7 @@ import kr.co.vividnext.sodalive.user.find_password.FindPasswordViewModel
 import kr.co.vividnext.sodalive.user.login.LoginViewModel
 import kr.co.vividnext.sodalive.user.signup.SignUpViewModel
 import kr.co.vividnext.sodalive.v2.main.MainV2ViewModel
+import kr.co.vividnext.sodalive.v2.main.home.HomeRecommendationViewModel
 import kr.co.vividnext.sodalive.v2.main.home.data.HomeRecommendationApi
 import kr.co.vividnext.sodalive.v2.main.home.data.HomeRecommendationRepository
 import okhttp3.OkHttpClient
@@ -384,6 +385,7 @@ class AppDI(private val context: Context, isDebugMode: Boolean) {
         viewModel { SearchViewModel(get()) }
         viewModel { PointStatusViewModel(get()) }
         viewModel { HomeViewModel(get(), get()) }
+        viewModel { HomeRecommendationViewModel(get()) }
         viewModel { PushNotificationListViewModel(get()) }
         viewModel { CharacterTabViewModel(get()) }
         viewModel { CharacterDetailViewModel(get()) }

app/src/main/java/kr/co/vividnext/sodalive/v2/main/home/HomeRecommendationViewModel.kt

@@ -0,0 +1,126 @@
+package kr.co.vividnext.sodalive.v2.main.home
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import com.orhanobut.logger.Logger
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.schedulers.Schedulers
+import kr.co.vividnext.sodalive.R
+import kr.co.vividnext.sodalive.base.BaseViewModel
+import kr.co.vividnext.sodalive.common.SharedPreferenceManager
+import kr.co.vividnext.sodalive.common.ToastMessage
+import kr.co.vividnext.sodalive.v2.main.home.data.FollowRecommendedCreatorsRequest
+import kr.co.vividnext.sodalive.v2.main.home.data.HomeRecommendationRepository
+import kr.co.vividnext.sodalive.v2.main.home.model.HomeRecommendationGenreCreatorSection
+import kr.co.vividnext.sodalive.v2.main.home.model.HomeRecommendationUiState
+import kr.co.vividnext.sodalive.v2.main.home.model.toContent
+
+class HomeRecommendationViewModel(
+    private val repository: HomeRecommendationRepository
+) : BaseViewModel() {
+
+    private val _recommendationStateLiveData = MutableLiveData<HomeRecommendationUiState>()
+    val recommendationStateLiveData: LiveData<HomeRecommendationUiState>
+        get() = _recommendationStateLiveData
+
+    private val _toastLiveData = MutableLiveData<ToastMessage?>()
+    val toastLiveData: LiveData<ToastMessage?>
+        get() = _toastLiveData
+
+    private val _isLoading = MutableLiveData(false)
+    val isLoading: LiveData<Boolean>
+        get() = _isLoading
+
+    fun loadRecommendations() {
+        _isLoading.value = true
+        _recommendationStateLiveData.value = HomeRecommendationUiState.Loading
+
+        compositeDisposable.add(
+            repository.getRecommendations(token = authToken())
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(
+                    {
+                        _isLoading.value = false
+                        val data = it.data
+                        if (it.success && data != null) {
+                            val content = data.toContent()
+                            _recommendationStateLiveData.value = if (content.isEmpty) {
+                                HomeRecommendationUiState.Empty
+                            } else {
+                                content
+                            }
+                        } else {
+                            showUnknownError(it.message)
+                        }
+                    },
+                    {
+                        _isLoading.value = false
+                        it.message?.let { message -> Logger.e(message) }
+                        showUnknownError(it.message)
+                    }
+                )
+        )
+    }
+
+    fun followCreators(sectionKey: String, creatorIds: List<Long>) {
+        if (creatorIds.isEmpty()) return
+
+        _isLoading.value = true
+        compositeDisposable.add(
+            repository.followRecommendedCreators(
+                request = FollowRecommendedCreatorsRequest(creatorIds = creatorIds),
+                token = authToken()
+            )
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(
+                    {
+                        _isLoading.value = false
+                        if (it.success) {
+                            updateFollowCompleted(sectionKey)
+                        } else {
+                            showUnknownError(it.message)
+                        }
+                    },
+                    {
+                        _isLoading.value = false
+                        it.message?.let { message -> Logger.e(message) }
+                        showUnknownError(it.message)
+                    }
+                )
+        )
+    }
+
+    private fun updateFollowCompleted(sectionKey: String) {
+        val content = _recommendationStateLiveData.value as? HomeRecommendationUiState.Content ?: return
+        _recommendationStateLiveData.value = when (sectionKey) {
+            SECTION_KEY_CHEER_CREATORS -> content.copy(
+                cheerCreators = content.cheerCreators.copy(isFollowCompleted = true)
+            )
+            else -> content.copy(
+                genreCreators = HomeRecommendationGenreCreatorSection(
+                    groups = content.genreCreators.groups.map { group ->
+                        if (group.genre == sectionKey || sectionKey == "$SECTION_KEY_GENRE_CREATORS:${group.genre}") {
+                            group.copy(isFollowCompleted = true)
+                        } else {
+                            group
+                        }
+                    }
+                )
+            )
+        }
+    }
+
+    private fun showUnknownError(message: String?) {
+        _recommendationStateLiveData.value = HomeRecommendationUiState.Error(message = message)
+        _toastLiveData.postValue(ToastMessage(resId = R.string.common_error_unknown))
+    }
+
+    private fun authToken(): String = "Bearer ${SharedPreferenceManager.token}"
+
+    private companion object {
+        const val SECTION_KEY_CHEER_CREATORS = "cheerCreators"
+        const val SECTION_KEY_GENRE_CREATORS = "genreCreators"
+    }
+}