Homework 13 ( Coroutines ) implementation.

app/src/main/kotlin/ru/otus/coroutineshomework/ui/login/LoginFragment.kt

@@ -7,6 +7,11 @@ import android.view.ViewGroup
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.Lifecycle
+//import androidx.lifecycle.LiveData
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import kotlinx.coroutines.launch
 import ru.otus.coroutineshomework.databinding.ContentBinding
 import ru.otus.coroutineshomework.databinding.FragmentLoginBinding
 import ru.otus.coroutineshomework.databinding.LoadingBinding
@@ -42,16 +47,20 @@ class LoginFragment : Fragment() {
 
         setupLogin()
         setupContent()
-
-        loginViewModel.state.observe(viewLifecycleOwner) {
-            when(it) {
-                is LoginViewState.Login -> showLogin(it)
-                LoginViewState.LoggingIn -> showLoggingIn()
-                is LoginViewState.Content -> showContent(it)
-                LoginViewState.LoggingOut -> showLoggingOut()
+        lifecycleScope.launch {
+            viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
+                loginViewModel.state.collect {
+                    when (it) {
+                        is LoginViewState.Login -> showLogin(it)
+                        LoginViewState.LoggingIn -> showLoggingIn()
+                        is LoginViewState.Content -> showContent(it)
+                        LoginViewState.LoggingOut -> showLoggingOut()
+                    }
+                }
             }
         }
     }
+
 
     private fun setupLogin() {
         login.loginButton.setOnClickListener {

app/src/main/kotlin/ru/otus/coroutineshomework/ui/login/LoginViewModel.kt

@@ -3,25 +3,67 @@ package ru.otus.coroutineshomework.ui.login
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import ru.otus.coroutineshomework.ui.login.data.Credentials
+import ru.otus.coroutineshomework.ui.login.data.User
 
 class LoginViewModel : ViewModel() {
 
-    private val _state = MutableLiveData<LoginViewState>(LoginViewState.Login())
-    val state: LiveData<LoginViewState> = _state
+    private val stateFlow = MutableStateFlow<LoginViewState>(LoginViewState.Login())
+    val state: StateFlow<LoginViewState> = stateFlow
+    private val loginApi = LoginApi()
+    private lateinit var userCred: User
 
     /**
      * Login to the network
      * @param name user name
      * @param password user password
      */
     fun login(name: String, password: String) {
-        // TODO: Implement login
+
+        //_state.value = LoginViewState.LoggingIn
+        stateFlow.value = LoginViewState.LoggingIn
+        viewModelScope.launch {
+            loginFlow(name, password).collect {
+                stateFlow.value = it
+            }
+        }
     }
 
     /**
      * Logout from the network
      */
     fun logout() {
-        // TODO: Implement logout
+
+        //_state.value = LoginViewState.LoggingOut
+        stateFlow.value = LoginViewState.LoggingOut
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                loginApi.logout()
+            }
+            //_state.value = LoginViewState.Login()
+            stateFlow.value = LoginViewState.Login()
+        }
     }
+
+    private fun loginFlow(name: String, password: String): Flow<LoginViewState> = flow {
+        emit(LoginViewState.LoggingIn)
+        try {
+            userCred = loginApi.login(Credentials(name, password))
+            emit(LoginViewState.Content(userCred))
+        } catch (e: IllegalArgumentException) {
+            emit(LoginViewState.Login(e))
+
+        }
+    }.flowOn(Dispatchers.IO)
 }
+

app/src/main/kotlin/ru/otus/coroutineshomework/ui/network/NetworkViewModel.kt

@@ -4,8 +4,11 @@ import android.util.Log
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
 import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlin.random.Random
 
@@ -18,7 +21,19 @@ class NetworkViewModel : ViewModel() {
     val result: LiveData<Long?> = _result
 
     fun startTest(numberOfThreads: Int) {
-        // TODO: Implement the logic
+        val results = mutableListOf<Result<Long>>()
+
+        viewModelScope.launch {
+            _running.value = true
+            repeat(numberOfThreads) {
+                results.add(async { emulateBlockingNetworkRequest() }.await())
+            }
+
+            val successRes = results.mapNotNull { it.getOrNull() }
+
+            _result.value = successRes.average().toLong()
+            _running.value = false
+        }
     }
 
     private companion object {

app/src/main/kotlin/ru/otus/coroutineshomework/ui/timer/TimerFragment.kt

@@ -5,9 +5,12 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import ru.otus.coroutineshomework.databinding.FragmentTimerBinding
@@ -25,6 +28,8 @@ class TimerFragment : Fragment() {
         binding.time.text = newValue.toDisplayString()
     }
 
+    private var timerTask: Job? = null
+    private var timerFlow = MutableStateFlow(Duration.ZERO)
     private var started by Delegates.observable(false) { _, _, newValue ->
         setButtonsState(newValue)
         if (newValue) {
@@ -53,12 +58,16 @@ class TimerFragment : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         savedInstanceState?.let {
-            time = it.getLong(TIME).milliseconds
+            timerFlow.value = it.getLong(TIME).milliseconds
             started = it.getBoolean(STARTED)
         }
         setButtonsState(started)
         with(binding) {
-            time.text = this@TimerFragment.time.toDisplayString()
+            lifecycleScope.launch {
+                viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
+                    timerFlow.collect { value -> time.text = value.toDisplayString() }
+                }
+            }
             btnStart.setOnClickListener {
                 started = true
             }
@@ -70,16 +79,21 @@ class TimerFragment : Fragment() {
 
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putLong(TIME, time.inWholeMilliseconds)
+        outState.putLong(TIME, timerFlow.value.inWholeMilliseconds)
         outState.putBoolean(STARTED, started)
     }
 
     private fun startTimer() {
-        // TODO: Start timer
+        timerTask = viewLifecycleOwner.lifecycleScope.launch {
+            while (isActive) {
+                delay(10)
+                timerFlow.emit(timerFlow.value + 10.milliseconds)
+            }
+        }
     }
 
     private fun stopTimer() {
-        // TODO: Stop timer
+        timerTask?.cancel()
     }
 
     override fun onDestroyView() {