Course work: implement login

app/build.gradle.kts

@@ -94,4 +94,7 @@ dependencies {
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
+
+    implementation("javax.inject:javax.inject:1")
+    implementation("androidx.compose.runtime:runtime-livedata")
 }

app/src/main/java/com/example/mobile_labs/api/MyServerService.kt

@@ -1,8 +1,11 @@
 package com.example.mobile_labs.api
 
+import android.util.Log
+import com.example.mobile_labs.api.models.Credentials
 import com.example.mobile_labs.api.models.EventRemote
 import com.example.mobile_labs.api.models.PerformanceRemote
 import com.example.mobile_labs.api.models.PersonRemote
+import com.example.mobile_labs.api.models.Token
 import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
 import kotlinx.serialization.json.Json
 import okhttp3.MediaType.Companion.toMediaType
@@ -52,6 +55,11 @@ interface MyServerService {
         @Path("id") id: Int,
     ): EventRemote
 
+    @POST("api/login")
+    suspend fun login(
+        @Body credentials: Credentials
+    ): Token
+
     companion object {
         private const val BASE_URL = "http://10.0.2.2:8000/"
 
@@ -96,6 +104,10 @@ interface MyServerService {
             }
         }
 
+        fun getToken(): String {
+            return _token
+        }
+
         fun setToken(token: String) {
             _token = token
         }

app/src/main/java/com/example/mobile_labs/api/models/Credentials.kt

@@ -4,6 +4,6 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 data class Credentials(
-    val login: String = "",
+    val email: String = "",
     val password: String = "",
 )

app/src/main/java/com/example/mobile_labs/api/models/Token.kt

@@ -0,0 +1,8 @@
+package com.example.mobile_labs.api.models
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class Token(
+    val token: String
+)

app/src/main/java/com/example/mobile_labs/api/people/PeopleRemoteMediator.kt

@@ -72,8 +72,8 @@ class PeopleRemoteMediator(
                     )
                 }
 
-//                dbRemoteKeyRepository.deleteRemoteKey(RemoteKeyType.PERSON)
+                dbRemoteKeyRepository.deleteRemoteKey(RemoteKeyType.PERSON)
-//                dbPersonRepository.clearPeople()
+                dbPersonRepository.clearPeople()
                 dbRemoteKeyRepository.createRemoteKeys(keys)
                 dbPersonRepository.insertPeople(people)
             }

app/src/main/java/com/example/mobile_labs/common/AppViewModelProvider.kt

@@ -7,6 +7,7 @@ import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import com.example.mobile_labs.TheatreApplication
 import com.example.mobile_labs.ui.event.list.EventListViewModel
+import com.example.mobile_labs.ui.login.LoginViewModel
 import com.example.mobile_labs.ui.performance.list.PerformanceListViewModel
 import com.example.mobile_labs.ui.performance.view.PerformanceViewModel
 import com.example.mobile_labs.ui.person.list.PeopleListViewModel
@@ -25,6 +26,9 @@ object AppViewModelProvider {
         initializer {
             PerformanceViewModel(this.createSavedStateHandle(), theatreApplication().container.performanceRestRepository)
         }
+        initializer {
+            LoginViewModel()
+        }
     }
 }
 

app/src/main/java/com/example/mobile_labs/ui/login/Login.kt

@@ -0,0 +1,116 @@
+package com.example.mobile_labs.ui.login
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.*
+import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.ui.*
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.unit.*
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavHostController
+import com.example.mobile_labs.R
+import com.example.mobile_labs.common.AppViewModelProvider
+import com.example.mobile_labs.ui.navigation.Screen
+
+@Composable
+@OptIn(ExperimentalMaterial3Api::class)
+fun Login(
+    navController: NavHostController,
+    viewModel: LoginViewModel = viewModel(factory = AppViewModelProvider.Factory)
+) {
+    val success = viewModel.successState.observeAsState().value
+
+    val login = remember { mutableStateOf(TextFieldValue(""))}
+    val password = remember { mutableStateOf(TextFieldValue(""))}
+
+    if (success == false) {
+        AlertDialog(
+            title = {
+                Text(
+                    text = "Ошибка авторизации",
+                    fontWeight = FontWeight.Bold,
+                    fontSize = 20.sp
+                )
+            },
+            text = {
+                Text(
+                    text = "Неверный логин или пароль",
+                    fontWeight = FontWeight.Normal,
+                    fontSize = 16.sp
+                )
+            },
+            onDismissRequest = {
+                viewModel.calmSuccessState()
+            },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        viewModel.calmSuccessState()
+                    }
+                ) {
+                    Text("OK")
+                }
+
+            }
+        )
+    }
+
+    Row(
+        horizontalArrangement = Arrangement.Center,
+        modifier = Modifier.fillMaxSize()
+    ) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier.fillMaxWidth(0.7f).fillMaxHeight().padding(vertical=100.dp)
+        ) {
+            Text(
+                text = "Вход",
+                style = TextStyle(
+                    fontSize = 40.sp,
+                    fontWeight = FontWeight(400),
+                ),
+                modifier = Modifier.fillMaxHeight(0.3f)
+            )
+            OutlinedTextField(
+                modifier = Modifier.fillMaxWidth().padding(bottom=30.dp),
+                value = login.value,
+                onValueChange = { login.value = it },
+                label = { Text(stringResource(id = R.string.login)) },
+                singleLine = true
+            )
+            OutlinedTextField(
+                modifier = Modifier.fillMaxWidth().padding(bottom=30.dp),
+                value = password.value,
+                onValueChange = { password.value = it },
+                label = { Text(stringResource(id = R.string.password)) },
+                singleLine = true
+            )
+            Button(
+                {
+                    viewModel.login(login.value.text, password.value.text, navController)
+                },
+                modifier = Modifier.padding(bottom=20.dp).fillMaxWidth(0.5f)
+            ) {
+                Text(
+                    text = "Войти",
+                    style = TextStyle(
+                        fontSize = 24.sp,
+                        fontWeight = FontWeight(400),
+                        color = Color(0xFFFFFFFF),
+                    )
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobile_labs/ui/login/LoginViewModel.kt

@@ -0,0 +1,49 @@
+package com.example.mobile_labs.ui.login
+
+import android.util.Log
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.navigation.NavHostController
+import com.example.mobile_labs.api.MyServerService
+import com.example.mobile_labs.api.models.Credentials
+import com.example.mobile_labs.ui.navigation.Screen
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+class LoginViewModel : ViewModel() {
+    private val _successState = MutableLiveData<Boolean?>()
+    val successState: LiveData<Boolean?>
+        get() = _successState
+
+    fun calmSuccessState() {
+        _successState.postValue(null)
+    }
+
+    fun login(login: String, password: String, navController: NavHostController) {
+        viewModelScope.launch {
+            val token = MyServerService.getInstance().login(Credentials(login, password))
+
+            if (token.token.isEmpty()) {
+                _successState.postValue(false)
+                return@launch
+            }
+
+            MyServerService.setToken(token.token)
+
+            _successState.setValue(true)
+
+            navigate(navController)
+        }
+    }
+    fun navigate(navController: NavHostController) {
+        Screen.About.route.let {
+            navController.navigate(it) {
+                popUpTo(it) {
+                    inclusive = true
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobile_labs/ui/navigation/MainNavbar.kt

@@ -33,8 +33,10 @@ import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import com.example.mobile_labs.ui.theme.Mobile_LabsTheme
 import com.example.mobile_labs.R
+import com.example.mobile_labs.api.MyServerService
 import com.example.mobile_labs.ui.about.About
 import com.example.mobile_labs.ui.event.list.EventList
+import com.example.mobile_labs.ui.login.Login
 import com.example.mobile_labs.ui.performance.list.PerformanceList
 import com.example.mobile_labs.ui.performance.view.PerformanceView
 import com.example.mobile_labs.ui.person.list.PeopleList
@@ -78,6 +80,7 @@ fun Navbar(
 ) {
     NavigationBar(modifier) {
         Screen.bottomBarItems.forEach { screen ->
+            if (MyServerService.getToken().isBlank() || screen.route !== "login") {
                 NavigationBarItem(
                     icon = { Icon(screen.icon, contentDescription = null) },
                     label = { Text(stringResource(screen.resourceId)) },
@@ -85,15 +88,16 @@ fun Navbar(
                     onClick = {
                         navController.navigate(screen.route) {
                             popUpTo(navController.graph.findStartDestination().id) {
-                            saveState = true
+                                saveState = false
                             }
                             launchSingleTop = true
-                        restoreState = true
+                            restoreState = false
                         }
                     }
                 )
             }
         }
+    }
 }
 
 @Composable
@@ -108,9 +112,14 @@ fun Navhost(
         modifier.padding(innerPadding)
     ) {
         composable(Screen.Schedule.route) { EventList(navController) }
-        composable(Screen.Repertoire.route) { PerformanceList(navController) }
+        composable(Screen.Repertoire.route) {
+            PerformanceList(navController)
+        }
         composable(Screen.PeopleList.route) { PeopleList() }
         composable(Screen.About.route) {  About() }
+        if (MyServerService.getToken().isBlank()) {
+            composable(Screen.Login.route) { Login(navController) }
+        }
         composable(
             Screen.PerformanceView.route,
             arguments = listOf(navArgument("id") { type = NavType.IntType })

app/src/main/java/com/example/mobile_labs/ui/navigation/Screen.kt

@@ -3,12 +3,14 @@ package com.example.mobile_labs.ui.navigation
 import androidx.annotation.StringRes
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.DateRange
+import androidx.compose.material.icons.filled.Face
 import androidx.compose.material.icons.filled.Favorite
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.List
 import androidx.compose.material.icons.filled.Person
 import androidx.compose.ui.graphics.vector.ImageVector
 import com.example.mobile_labs.R
+import com.example.mobile_labs.api.MyServerService
 
 enum class Screen(
     val route: String,
@@ -30,10 +32,19 @@ enum class Screen(
     ),
     About(
         "about", R.string.about_main_title, Icons.Filled.Info
+    ),
+    Login(
+        "login", R.string.login_main_title, Icons.Filled.Face
     );
 
     companion object {
-        val bottomBarItems = listOf(
+        val bottomBarItems = if (MyServerService.getToken().isBlank()) listOf(
+            Schedule,
+            Repertoire,
+            PeopleList,
+            About,
+            Login
+        ) else listOf(
             Schedule,
             Repertoire,
             PeopleList,

app/src/main/java/com/example/mobile_labs/ui/performance/list/PerformanceList.kt

@@ -1,6 +1,7 @@
 package com.example.mobile_labs.ui.performance.list
 
 import android.content.res.Configuration
+import android.util.Log
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
@@ -28,6 +29,7 @@ import androidx.paging.compose.itemContentType
 import androidx.paging.compose.itemKey
 import coil.compose.AsyncImage
 import com.example.mobile_labs.R
+import com.example.mobile_labs.api.MyServerService
 import com.example.mobile_labs.database.performance.model.Performance
 import com.example.mobile_labs.common.AppViewModelProvider
 import com.example.mobile_labs.ui.navigation.Screen

app/src/main/res/values/strings.xml

@@ -6,12 +6,15 @@
     <string name="performance_author">Автор</string>
     <string name="performance_director">Режиссёр</string>
     <string name="performance_actors">Актёры</string>
-    <string name="people_main_title">Люди театра</string>
+    <string name="people_main_title">Труппа</string>
     <string name="about_main_title">О нас</string>
+    <string name="login_main_title">Вход</string>
     <string name="performance_view_main_title">Представление</string>
     <string name="people_missing_description">Данные о людях отсутствуют</string>
     <string name="events_missing_description">Данные о событиях отсутствуют</string>
     <string name="performance_missing_description">Данные о представлениях отсутствуют</string>
+    <string name="login">Логин</string>
+    <string name="password">Пароль</string>
     <string name="about_text">
         <p>
             Netus quis congue nascetur ullamcorper nibh, nostra iaculis turpis! Facilisi pretium vehicula purus porttitor vitae aliquet dignissim. Donec diam molestie litora magnis dolor aptent scelerisque mus. Sit mi, venenatis interdum. Commodo vel malesuada tincidunt eget. Aenean laoreet lacinia platea sem? Libero urna odio diam? Nisl, sodales nisi gravida. Interdum elementum libero turpis dapibus tristique per sed maecenas ante integer massa? Tortor molestie sapien himenaeos condimentum. Facilisis accumsan ullamcorper semper fermentum elementum quisque. Curae;, vivamus ante hac elit fringilla odio ornare curabitur quisque magna commodo. Placerat proin!