feat(home): 크리에이터 랭킹 ViewModel을 추가한다

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

@@ -0,0 +1,70 @@
+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.HomeCreatorRankingRepository
+import kr.co.vividnext.sodalive.v2.main.home.model.HomeCreatorRankingUiState
+import kr.co.vividnext.sodalive.v2.main.home.model.toCreatorRankingItems
+
+class HomeCreatorRankingViewModel(
+    private val repository: HomeCreatorRankingRepository
+) : BaseViewModel() {
+
+    private val _rankingStateLiveData = MutableLiveData<HomeCreatorRankingUiState>()
+    val rankingStateLiveData: LiveData<HomeCreatorRankingUiState>
+        get() = _rankingStateLiveData
+
+    private val _toastLiveData = MutableLiveData<ToastMessage?>()
+    val toastLiveData: LiveData<ToastMessage?>
+        get() = _toastLiveData
+
+    private val _isLoading = MutableLiveData(false)
+    val isLoading: LiveData<Boolean>
+        get() = _isLoading
+
+    fun loadCreatorRankings() {
+        _isLoading.value = true
+        _rankingStateLiveData.value = HomeCreatorRankingUiState.Loading
+
+        compositeDisposable.add(
+            repository.getCreatorRankings(token = authToken())
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(
+                    {
+                        _isLoading.value = false
+                        val data = it.data
+                        if (it.success && data != null) {
+                            val items = data.toCreatorRankingItems()
+                            _rankingStateLiveData.value = if (items.isEmpty()) {
+                                HomeCreatorRankingUiState.Empty
+                            } else {
+                                HomeCreatorRankingUiState.Content(items = items)
+                            }
+                        } else {
+                            showUnknownError(it.message)
+                        }
+                    },
+                    {
+                        _isLoading.value = false
+                        it.message?.let { message -> Logger.e(message) }
+                        showUnknownError(it.message)
+                    }
+                )
+        )
+    }
+
+    private fun showUnknownError(message: String?) {
+        _rankingStateLiveData.value = HomeCreatorRankingUiState.Error(message = message)
+        _toastLiveData.postValue(ToastMessage(resId = R.string.common_error_unknown))
+    }
+
+    private fun authToken(): String = "Bearer ${SharedPreferenceManager.token}"
+}

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

@@ -0,0 +1,17 @@
+package kr.co.vividnext.sodalive.v2.main.home.model
+
+import kr.co.vividnext.sodalive.v2.widget.creatorranking.CreatorRankingItem
+
+sealed interface HomeCreatorRankingUiState {
+    data object Loading : HomeCreatorRankingUiState
+
+    data class Content(
+        val items: List<CreatorRankingItem>
+    ) : HomeCreatorRankingUiState
+
+    data object Empty : HomeCreatorRankingUiState
+
+    data class Error(
+        val message: String? = null
+    ) : HomeCreatorRankingUiState
+}