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package com.example.pizzaorder
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import android.content.Context
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import android.content.Intent
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import androidx.annotation.StringRes
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import androidx.compose.foundation.layout.Arrangement
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.fillMaxWidth
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import androidx.compose.foundation.layout.padding
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import androidx.compose.material.icons.Icons
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import androidx.compose.material.icons.automirrored.filled.ArrowBack
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import androidx.compose.material.icons.filled.MoreVert
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import androidx.compose.material3.AlertDialog
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import androidx.compose.material3.Button
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import androidx.compose.material3.ButtonDefaults
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import androidx.compose.material3.ExperimentalMaterial3Api
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import androidx.compose.material3.HorizontalDivider
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import androidx.compose.material3.Icon
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import androidx.compose.material3.IconButton
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.ModalBottomSheet
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import androidx.compose.material3.Scaffold
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import androidx.compose.material3.Text
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import androidx.compose.material3.TopAppBar
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import androidx.compose.material3.TopAppBarDefaults
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import androidx.compose.material3.rememberModalBottomSheetState
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.collectAsState
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import androidx.compose.runtime.getValue
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import androidx.compose.runtime.mutableStateOf
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import androidx.compose.runtime.remember
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import androidx.compose.runtime.rememberCoroutineScope
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import androidx.compose.runtime.setValue
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.res.dimensionResource
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import androidx.compose.ui.res.stringResource
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import androidx.compose.ui.unit.dp
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import androidx.lifecycle.viewmodel.compose.viewModel
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import androidx.navigation.NavHostController
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import androidx.navigation.compose.NavHost
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import androidx.navigation.compose.composable
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import androidx.navigation.compose.currentBackStackEntryAsState
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import androidx.navigation.compose.rememberNavController
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import com.example.pizzaorder.ui.BurgerScreen
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import com.example.pizzaorder.ui.ForgotPasswordScreen
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import com.example.pizzaorder.ui.LoginScreen
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import com.example.pizzaorder.ui.OrderPlacedScreen
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import com.example.pizzaorder.ui.OrderSummaryScreen
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import com.example.pizzaorder.ui.OrderViewModel
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import com.example.pizzaorder.ui.PizzaScreen
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import com.example.pizzaorder.ui.SignUpScreen
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import com.example.pizzaorder.ui.StartOrderScreen
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import com.google.firebase.auth.FirebaseAuth
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enum class PizzaScreenPages(@StringRes val title: Int) {
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Login(title = R.string.login),
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SignUp(title = R.string.signup),
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ForgotPassword(title = R.string.forgot_password),
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Start(title = R.string.start_order),
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Pizza(title = R.string.choose_pizza_type),
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Burger(title = R.string.choose_burger_type),
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Pickup(title = R.string.choose_pickup_date),
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Summary(title = R.string.order_summary),
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OrderPlaced(title = R.string.order_placed)
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}
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@OptIn(ExperimentalMaterial3Api::class)
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@Composable
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fun PizzaAppBar(
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currentScreen: PizzaScreenPages,
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canNavigateBack: Boolean,
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navigateUp: () -> Unit,
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onMenuClicked: () -> Unit,
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modifier: Modifier = Modifier
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) {
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TopAppBar(
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title = { Text(stringResource(currentScreen.title)) },
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colors = TopAppBarDefaults.mediumTopAppBarColors(
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containerColor = MaterialTheme.colorScheme.primaryContainer
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),
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modifier = modifier,
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navigationIcon = {
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if (canNavigateBack) {
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IconButton(onClick = navigateUp) {
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Icon(
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imageVector = Icons.AutoMirrored.Filled.ArrowBack,
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contentDescription = stringResource(R.string.back_button)
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)
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}
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}
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},
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actions = {
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IconButton(onClick = onMenuClicked) {
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Icon(
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imageVector = Icons.Default.MoreVert,
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contentDescription = stringResource(R.string.menu_button)
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)
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}
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}
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)
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}
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@OptIn(ExperimentalMaterial3Api::class)
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@Composable
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fun PizzaApp(
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viewModel: OrderViewModel = viewModel(),
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navController: NavHostController = rememberNavController()
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) {
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val backStackEntry by navController.currentBackStackEntryAsState()
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val currentScreen = PizzaScreenPages.valueOf(
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backStackEntry?.destination?.route ?: PizzaScreenPages.Start.name
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)
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val isAuthenticated = FirebaseAuth.getInstance().currentUser != null
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var showBottomSheet by remember { mutableStateOf(false) }
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var showLoginDialog by remember { mutableStateOf(false) }
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val sheetState = rememberModalBottomSheetState()
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val scope = rememberCoroutineScope()
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if (showLoginDialog) {
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AlertDialog(
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onDismissRequest = {showLoginDialog = false},
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title = { Text("Login Required") },
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text = { Text("You need to log in to access this feature.") },
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confirmButton = {
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Button(onClick = {showLoginDialog = false}) {
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Text("OK")
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}
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}
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)
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}
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if (showBottomSheet) {
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ModalBottomSheet(
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onDismissRequest = { showBottomSheet = false },
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sheetState = sheetState
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) {
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MenuContent(
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onHomeClicked = {
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showBottomSheet = false
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if (isAuthenticated) {
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navController.navigate(PizzaScreenPages.Start.name)
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} else {
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showLoginDialog = true
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}
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},
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onOrdersClicked = {
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showBottomSheet = false
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if (isAuthenticated) {
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navController.navigate(PizzaScreenPages.Summary.name)
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} else {
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showLoginDialog = true
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}
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},
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onLogoutClicked = {
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FirebaseAuth.getInstance().signOut()
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showBottomSheet = false
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navController.navigate(PizzaScreenPages.Login.name) {
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popUpTo(PizzaScreenPages.Login.name) { inclusive = true }
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}
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}
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)
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}
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}
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Scaffold(
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topBar = {
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PizzaAppBar(
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currentScreen = currentScreen,
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canNavigateBack = navController.previousBackStackEntry != null,
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navigateUp = { navController.navigateUp() },
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onMenuClicked = { showBottomSheet = true }
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)
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},
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bottomBar = {
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}
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) { innerPadding ->
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val uiState by viewModel.uiState.collectAsState()
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NavHost(
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navController = navController,
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startDestination = if (isAuthenticated) PizzaScreenPages.Start.name else PizzaScreenPages.Login.name,
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modifier = Modifier.padding(innerPadding)
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) {
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composable(route = PizzaScreenPages.Login.name) {
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LoginScreen(
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navController = navController,
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modifier = Modifier
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.fillMaxSize()
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.padding(dimensionResource(R.dimen.padding_medium))
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)
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}
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composable(route = PizzaScreenPages.SignUp.name) {
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SignUpScreen(
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navController = navController,
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modifier = Modifier
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.fillMaxSize()
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.padding(dimensionResource(R.dimen.padding_medium))
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)
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}
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composable(route = PizzaScreenPages.ForgotPassword.name) {
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ForgotPasswordScreen(
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navController = navController,
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modifier = Modifier
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.fillMaxSize()
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.padding(dimensionResource(R.dimen.padding_medium))
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)
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}
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composable(route = PizzaScreenPages.Start.name) {
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StartOrderScreen(
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navController = navController,
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modifier = Modifier.fillMaxSize())
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}
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composable(route = PizzaScreenPages.Pizza.name) {
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PizzaScreen(
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viewModel = viewModel,
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navController = navController)
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}
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composable(route = PizzaScreenPages.Burger.name) {
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BurgerScreen(
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viewModel = viewModel,
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navController = navController)
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}
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composable(route = PizzaScreenPages.Summary.name) {
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OrderSummaryScreen(
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viewModel = viewModel,
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onBack = { navController.popBackStack() },
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onPlace = { navController.navigate(PizzaScreenPages.OrderPlaced.name) })
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}
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composable(route = PizzaScreenPages.OrderPlaced.name) {
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OrderPlacedScreen(
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onBack = {
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viewModel.clearOrder()
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navController.navigate(PizzaScreenPages.Start.name) }
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)
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}
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}
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}
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}
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@Composable
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fun MenuContent(
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onHomeClicked: () -> Unit,
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onOrdersClicked: () -> Unit,
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onLogoutClicked: () -> Unit
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) {
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Column(
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modifier = Modifier
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.fillMaxWidth()
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.padding(16.dp),
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verticalArrangement = Arrangement.spacedBy(16.dp)
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) {
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Text(
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text = "Menu",
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style = MaterialTheme.typography.titleMedium,
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modifier = Modifier.padding(bottom = 8.dp)
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)
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HorizontalDivider()
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Button(
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onClick = onHomeClicked,
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modifier = Modifier.fillMaxWidth()
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) {
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Text("Home")
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}
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Button(
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onClick = onOrdersClicked,
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modifier = Modifier.fillMaxWidth()
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) {
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Text("Orders")
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}
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Button(
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onClick = onLogoutClicked,
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modifier = Modifier.fillMaxWidth(),
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colors = ButtonDefaults.buttonColors(containerColor = Color.Red)
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) {
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Text("Logout")
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}
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}
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} |
...
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...
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