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
@@ -78,20 +80,22 @@ fun Navbar(
 ) {
     NavigationBar(modifier) {
         Screen.bottomBarItems.forEach { screen ->
-            NavigationBarItem(
+            if (MyServerService.getToken().isBlank() || screen.route !== "login") {
-                icon = { Icon(screen.icon, contentDescription = null) },
+                NavigationBarItem(
-                label = { Text(stringResource(screen.resourceId)) },
+                    icon = { Icon(screen.icon, contentDescription = null) },
-                selected = currentDestination?.hierarchy?.any { it.route == screen.route } == true,
+                    label = { Text(stringResource(screen.resourceId)) },
-                onClick = {
+                    selected = currentDestination?.hierarchy?.any { it.route == screen.route } == true,
-                    navController.navigate(screen.route) {
+                    onClick = {
-                        popUpTo(navController.graph.findStartDestination().id) {
+                        navController.navigate(screen.route) {
-                            saveState = true
+                            popUpTo(navController.graph.findStartDestination().id) {
+                                saveState = false
+                            }
+                            launchSingleTop = true
+                            restoreState = false
                         }
-                        launchSingleTop = true
-                        restoreState = true
                     }
-                }
+                )
-            )
+            }
         }
     }
 }
@@ -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() }
+        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>
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