[feat] #13 뷰모델 세팅 + UiState 추가

app/src/main/java/com/sopt/now/presentation/Home/HomeViewModel.kt

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+package com.sopt.now.presentation.Home
+
+class HomeViewModel {
+}

app/src/main/java/com/sopt/now/presentation/Login/LoginViewModel.kt

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+package com.sopt.now.presentation.Login
+
+class LoginViewModel {
+}

app/src/main/java/com/sopt/now/presentation/Mypage/MypageViewModel.kt

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+package com.sopt.now.presentation.Mypage
+
+class MypageViewModel {
+}

app/src/main/java/com/sopt/now/presentation/common/ViewModelFactory.kt

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+package com.sopt.now.presentation.common
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.sopt.now.presentation.Home.HomeViewModel
+import com.sopt.now.presentation.Login.LoginViewModel
+import com.sopt.now.presentation.Mypage.MypageViewModel
+import com.sopt.now.presentation.Signup.SignupViewModel
+import java.lang.IllegalArgumentException
+
+class ViewModelFactory: ViewModelProvider.Factory {
+    override fun <T: ViewModel> create(modelClass: Class<T>): T {
+        if(modelClass.isAssignableFrom(SignupViewModel::class.java)) {
+            return SignupViewModel() as T
+        } else if(modelClass.isAssignableFrom(LoginViewModel::class.java)) {
+            return LoginViewModel() as T
+        } else if(modelClass.isAssignableFrom(HomeViewModel::class.java)) {
+            return HomeViewModel() as T
+        } else if(modelClass.isAssignableFrom(MypageViewModel::class.java)) {
+            return MypageViewModel() as T
+        }
+        throw IllegalArgumentException("Unknown ViewModel Class")
+    }
+}

app/src/main/java/com/sopt/now/util/BaseResponse.kt

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+package com.sopt.now.util
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class BaseResponse<T>(
+    @SerialName("code")
+    val code: Int,
+    @SerialName("message")
+    val message: String,
+    @SerialName("data")
+    val data: T,
+)

app/src/main/java/com/sopt/now/util/UiState.kt

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+package com.sopt.now.util
+
+sealed class UiState<out T> {
+    object Loading : UiState<Nothing>()
+
+    object Empty : UiState<Nothing>()
+
+    data class Success<T>(val data: T) : UiState<T>()
+
+    data class Error(val message: String?) : UiState<Nothing>()
+}