singleton (AuthRepository) repo refactor

app/src/main/java/ru/myitschool/work/App.kt

@@ -20,6 +20,6 @@ class App : Application() {
         super.onCreate()
         instance = this
 
-        AuthRepository.init(applicationContext)
+        AuthRepository.getInstance(applicationContext)
     }
 }

app/src/main/java/ru/myitschool/work/core/Constants.kt

@@ -1,7 +1,10 @@
 package ru.myitschool.work.core
 
 object Constants {
+
     const val HOST = "http://10.0.2.2:8080"
+//    const val HOST = "http://127.0.0.1:8080"
+
     const val AUTH_URL = "/auth"
     const val INFO_URL = "/info"
     const val BOOKING_URL = "/booking"

app/src/main/java/ru/myitschool/work/data/repo/AuthRepository.kt

@@ -7,42 +7,48 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import ru.myitschool.work.data.source.NetworkDataSource
 
-object AuthRepository {
+class AuthRepository private constructor(context: Context) {
-    private const val PREFS_NAME = "auth_prefs"
-    private const val KEY_CODE = "auth_code"
-    private const val KEY_NAME = "user_name"
-    private const val KEY_PHOTO = "user_photo"
 
-    private var _context: Context? = null
+    companion object {
+        @Volatile
+        private var INSTANCE: AuthRepository? = null
+
+        fun getInstance(context: Context): AuthRepository {
+            return INSTANCE ?: synchronized(this) {
+                INSTANCE ?: AuthRepository(context.applicationContext).also { INSTANCE = it }
+            }
+        }
+
+        fun clearInstance() {
+            INSTANCE = null
+        }
+    }
+
+    private val PREFS_NAME = "auth_prefs"
+    private val KEY_CODE = "auth_code"
+    private val KEY_NAME = "user_name"
+    private val KEY_PHOTO = "user_photo"
+
+    private val context: Context = context.applicationContext
     private var codeCache: String? = null
     private var userCache: UserCache? = null
 
     private val _isAuthorized = MutableStateFlow(false)
     val isAuthorized: StateFlow<Boolean> = _isAuthorized.asStateFlow()
 
-    fun init(context: Context) {
+    init {
-        if (_context == null) {
+        val prefs = context.getSharedPreferences(PREFS_NAME, MODE_PRIVATE)
-            _context = context.applicationContext
+        codeCache = prefs.getString(KEY_CODE, null)
+        val name = prefs.getString(KEY_NAME, null)
+        val photo = prefs.getString(KEY_PHOTO, null)
 
-            val prefs = _context!!.getSharedPreferences(PREFS_NAME, MODE_PRIVATE)
+        if (codeCache != null && name != null) {
-            codeCache = prefs.getString(KEY_CODE, null)
+            userCache = UserCache(name, photo)
-            val name = prefs.getString(KEY_NAME, null)
+            _isAuthorized.value = true
-            val photo = prefs.getString(KEY_PHOTO, null)
-
-            if (codeCache != null && name != null) {
-                userCache = UserCache(name, photo)
-                _isAuthorized.value = true
-            }
         }
     }
 
-    private fun requireContext(): Context {
+    private fun getPrefs() = context.getSharedPreferences(PREFS_NAME, MODE_PRIVATE)
-        return _context ?: throw IllegalStateException(
-            "AuthRepository not inited"
-        )
-    }
-
-    private fun getPrefs() = requireContext().getSharedPreferences(PREFS_NAME, MODE_PRIVATE)
 
     suspend fun checkAndSave(text: String): Result<Boolean> {
         return NetworkDataSource.checkAuth(text).onSuccess { success ->

app/src/main/java/ru/myitschool/work/data/repo/BookRepository.kt

@@ -4,9 +4,10 @@ import ru.myitschool.work.data.model.BookingInfoResponse
 import ru.myitschool.work.data.source.AuthException
 import ru.myitschool.work.data.source.NetworkDataSource
 
-object BookRepository {
+class BookRepository(private val authRepository: AuthRepository) {
+
     suspend fun getAvailableBookings(): Result<BookingInfoResponse> {
-        val code = AuthRepository.getCurrentCode()
+        val code = authRepository.getCurrentCode()
         return if (code != null) {
             NetworkDataSource.getBookingInfo(code)
         } else {
@@ -15,7 +16,7 @@ object BookRepository {
     }
 
     suspend fun book(date: String, placeId: Int): Result<Unit> {
-        val code = AuthRepository.getCurrentCode()
+        val code = authRepository.getCurrentCode()
         return if (code != null) {
             NetworkDataSource.book(code, date, placeId)
         } else {

app/src/main/java/ru/myitschool/work/data/repo/MainRepository.kt

@@ -4,9 +4,10 @@ import ru.myitschool.work.data.model.UserInfoResponse
 import ru.myitschool.work.data.source.AuthException
 import ru.myitschool.work.data.source.NetworkDataSource
 
-object MainRepository {
+class MainRepository(private val authRepository: AuthRepository) {
+
     suspend fun getUserInfo(): Result<UserInfoResponse> {
-        val code = AuthRepository.getCurrentCode()
+        val code = authRepository.getCurrentCode()
         return if (code != null) {
             NetworkDataSource.getInfo(code)
         } else {

app/src/main/java/ru/myitschool/work/ui/screen/NavigationGraph.kt

@@ -6,7 +6,9 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
@@ -24,8 +26,10 @@ fun AppNavHost(
     modifier: Modifier = Modifier,
     navController: NavHostController = rememberNavController()
 ) {
-    // authorized state follow
+    val context = LocalContext.current
-    val isAuthorized by AuthRepository.isAuthorized.collectAsState()
+    val authRepository = remember { AuthRepository.getInstance(context) }
+
+    val isAuthorized by authRepository.isAuthorized.collectAsState()
 
     LaunchedEffect(isAuthorized) {
         if (isAuthorized) {

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt

@@ -21,6 +21,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.stringResource
@@ -34,7 +35,7 @@ import ru.myitschool.work.ui.nav.MainScreenDestination
 
 @Composable
 fun AuthScreen(
-    viewModel: AuthViewModel = viewModel(),
+    viewModel: AuthViewModel = viewModel(factory = AuthViewModelFactory(LocalContext.current)),
     navController: NavController
 ) {
     val state by viewModel.uiState.collectAsState()

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt

@@ -1,6 +1,8 @@
 package ru.myitschool.work.ui.screen.auth
 
+import android.content.Context
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -12,10 +14,11 @@ import kotlinx.coroutines.launch
 import ru.myitschool.work.data.repo.AuthRepository
 import ru.myitschool.work.domain.auth.CheckAndSaveAuthCodeUseCase
 
-private val authRepo = AuthRepository
-private val checkAndSaveAuthCodeUseCase = CheckAndSaveAuthCodeUseCase(authRepo)
 
-class AuthViewModel : ViewModel() {
+class AuthViewModel(
+    private val authRepository: AuthRepository,
+    private val checkAndSaveAuthCodeUseCase: CheckAndSaveAuthCodeUseCase
+) : ViewModel() {
     private val _uiState = MutableStateFlow<AuthState>(AuthState.Data())
     val uiState: StateFlow<AuthState> = _uiState.asStateFlow()
 
@@ -68,6 +71,18 @@ class AuthViewModel : ViewModel() {
     }
 }
 
+
+class AuthViewModelFactory(private val context: Context) : ViewModelProvider.Factory {
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        if (modelClass.isAssignableFrom(AuthViewModel::class.java)) {
+            val authRepository = AuthRepository.getInstance(context)
+            val useCase = CheckAndSaveAuthCodeUseCase(authRepository)
+            return AuthViewModel(authRepository, useCase) as T
+        }
+        throw IllegalArgumentException("Unknown ViewModel class")
+    }
+}
+
 sealed interface AuthAction {
     object NavigateToMain : AuthAction
 }

app/src/main/java/ru/myitschool/work/ui/screen/book/BookScreen.kt

@@ -19,13 +19,14 @@ import androidx.navigation.NavController
 import ru.myitschool.work.R
 import ru.myitschool.work.core.TestIds
 import androidx.compose.material3.Icon
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.style.TextAlign
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun BookScreen(
-    viewModel: BookViewModel = viewModel(),
+    viewModel: BookViewModel = viewModel(factory = BookViewModelFactory(LocalContext.current)),
     navController: NavController
 ) {
     val state by viewModel.uiState.collectAsState()

app/src/main/java/ru/myitschool/work/ui/screen/book/BookViewModel.kt

@@ -1,6 +1,8 @@
 package ru.myitschool.work.ui.screen.book
 
+import android.content.Context
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -9,14 +11,14 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import ru.myitschool.work.data.repo.AuthRepository
 import ru.myitschool.work.data.repo.BookRepository
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 
-private val bookRepo = BookRepository
 
-class BookViewModel : ViewModel() {
+class BookViewModel(private val bookRepo: BookRepository) : ViewModel() {
     private val _uiState = MutableStateFlow<BookState>(BookState.Loading)
     val uiState: StateFlow<BookState> = _uiState.asStateFlow()
 
@@ -179,4 +181,16 @@ class BookViewModel : ViewModel() {
 sealed interface BookAction {
     object NavigateBack : BookAction
     object NavigateBackWithRefresh : BookAction
+}
+
+
+class BookViewModelFactory(private val context: Context) : ViewModelProvider.Factory {
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        if (modelClass.isAssignableFrom(BookViewModel::class.java)) {
+            val authRepository = AuthRepository.getInstance(context)
+            val bookRepository = BookRepository(authRepository)
+            return BookViewModel(bookRepository) as T
+        }
+        throw IllegalArgumentException("Unknown ViewModel class")
+    }
 }

app/src/main/java/ru/myitschool/work/ui/screen/main/MainScreen.kt

@@ -46,7 +46,7 @@ import ru.myitschool.work.ui.nav.BookScreenDestination
 
 @Composable
 fun MainScreen(
-    viewModel: MainViewModel = viewModel(),
+    viewModel: MainViewModel = viewModel(factory = MainViewModelFactory(LocalContext.current)),
     navController: NavController
 ) {
     val state by viewModel.uiState.collectAsState()

app/src/main/java/ru/myitschool/work/ui/screen/main/MainViewModel.kt

@@ -1,6 +1,8 @@
 package ru.myitschool.work.ui.screen.main
 
+import android.content.Context
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -14,10 +16,11 @@ import java.time.format.DateTimeFormatter
 import ru.myitschool.work.data.repo.AuthRepository
 import ru.myitschool.work.data.repo.MainRepository
 
-private val authRepo = AuthRepository
-private val mainRepo = MainRepository
 
-class MainViewModel : ViewModel() {
+
+class MainViewModel(private val authRepo: AuthRepository,
+                    private val mainRepo: MainRepository)
+    : ViewModel() {
     private val _uiState = MutableStateFlow<MainState>(MainState.Loading)
     val uiState: StateFlow<MainState> = _uiState.asStateFlow()
 
@@ -95,6 +98,17 @@ class MainViewModel : ViewModel() {
     }
 }
 
+class MainViewModelFactory(private val context: Context) : ViewModelProvider.Factory {
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        if (modelClass.isAssignableFrom(MainViewModel::class.java)) {
+            val authRepository = AuthRepository.getInstance(context)
+            val mainRepository = MainRepository(authRepository)
+            return MainViewModel(authRepository, mainRepository) as T
+        }
+        throw IllegalArgumentException("Unknown ViewModel class")
+    }
+}
+
 sealed interface MainAction {
     object NavigateToAuth : MainAction
     object NavigateToBooking : MainAction