[feat] #1 main-navigator

feature/main/src/main/java/org/sopt/main/navigator/MainActivity.kt

@@ -0,0 +1,43 @@
+package org.sopt.main.navigator
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import dagger.hilt.android.AndroidEntryPoint
+import org.sopt.designsystem.ui.theme.NOWSOPTAndroidTheme
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            NOWSOPTAndroidTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    MainScreen(
+                        modifier = Modifier
+                            .fillMaxSize()
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun GreetingPreview() {
+    NOWSOPTAndroidTheme {
+        MainScreen()
+    }
+}

feature/main/src/main/java/org/sopt/main/navigator/MainNavigator.kt

@@ -0,0 +1,52 @@
+package org.sopt.main.navigator
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.navigation.NavDestination
+import androidx.navigation.NavHostController
+import androidx.navigation.NavOptions
+import androidx.navigation.compose.currentBackStackEntryAsState
+import androidx.navigation.compose.rememberNavController
+import org.sopt.main.home.navigation.navigateHome
+import org.sopt.main.login.navigation.LoginRoute
+import org.sopt.main.login.navigation.navigateLogin
+import org.sopt.main.model.User
+import org.sopt.main.signup.navigation.navigateSignup
+
+class MainNavigator(
+    val navController: NavHostController
+) {
+    private val currentDestination: NavDestination?
+        @Composable get() = navController
+            .currentBackStackEntryAsState().value?.destination
+
+    val startDestination = LoginRoute.route
+
+    fun navigateLogin(user: User) {
+        navController.navigateLogin(user)
+    }
+
+    fun navigateSignup() {
+        navController.navigateSignup()
+    }
+
+    fun navigateHome(user: User) {
+        navController.navigateHome(user)
+    }
+
+    fun popBackStackIfNotHome() {
+        if (!isSameCurrentDestination(LoginRoute.route)) {
+            navController.popBackStack()
+        }
+    }
+
+    private fun isSameCurrentDestination(route: String) =
+        navController.currentDestination?.route == route
+}
+
+@Composable
+fun rememberMainNavigator(
+    navController: NavHostController = rememberNavController(),
+): MainNavigator = remember(navController) {
+    MainNavigator(navController)
+}

feature/main/src/main/java/org/sopt/main/navigator/MainScreen.kt

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+package org.sopt.main.navigator
+
+import androidx.compose.material3.Scaffold
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.rememberNavController
+import org.sopt.main.home.navigation.homeNavGraph
+import org.sopt.main.login.navigation.loginNavGraph
+import org.sopt.main.signup.navigation.signupNavGraph
+
+@Composable
+fun MainScreen(
+    modifier: Modifier = Modifier,
+    navigator: MainNavigator = rememberMainNavigator(),
+) {
+    val context = LocalContext.current
+
+    Scaffold(
+        modifier = modifier,
+        content = { it ->
+            val padding = it
+            NavHost(
+                navController = navigator.navController,
+                startDestination = navigator.startDestination,
+            ) {
+                loginNavGraph(
+                    navController = navigator.navController,
+                    popBackStack = navigator::popBackStackIfNotHome,
+                    navigateSignup = navigator::navigateSignup,
+                    navigateHome = navigator::navigateHome
+                )
+
+                signupNavGraph(
+                    popBackStack = navigator::popBackStackIfNotHome,
+                    navigateLogin = navigator::navigateLogin
+                )
+
+                homeNavGraph(
+                    navController = navigator.navController,
+                    popBackStack = navigator::popBackStackIfNotHome,
+                )
+            }
+        }
+    )
+}