Added initial code for possible future deeplink nav support

app/src/main/AndroidManifest.xml

@@ -29,6 +29,14 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+<!--            <intent-filter android:autoVerify="true">-->
+<!--                <action android:name="android.intent.action.VIEW" />-->
+<!--                <category android:name="android.intent.category.DEFAULT" />-->
+<!--                <category android:name="android.intent.category.BROWSABLE" />-->
+<!--                <data android:scheme="https" />-->
+<!--                <data android:host="github.com" />-->
+<!--                <data android:pathPattern="/rt-bishop/Look4Sat/passes.*" />-->
+<!--            </intent-filter>-->
         </activity>
 
         <meta-data

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -25,6 +25,10 @@ import androidx.compose.animation.core.rememberInfiniteTransition
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
+import androidx.compose.animation.scaleIn
+import androidx.compose.animation.scaleOut
+import androidx.compose.animation.slideInHorizontally
+import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.togetherWith
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -32,6 +36,7 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
@@ -39,11 +44,13 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteDefaults
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteScaffold
 import androidx.compose.material3.adaptive.navigationsuite.NavigationSuiteType
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -62,6 +69,8 @@ import androidx.navigation3.runtime.rememberNavBackStack
 import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator
 import androidx.navigation3.ui.NavDisplay
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
+import com.rtbishop.look4sat.core.presentation.DeeplinkResolver
+import com.rtbishop.look4sat.core.presentation.RadarDestination
 import com.rtbishop.look4sat.core.presentation.Screen
 import com.rtbishop.look4sat.core.presentation.hasEnoughHeight
 import com.rtbishop.look4sat.core.presentation.hasEnoughWidth
@@ -72,13 +81,47 @@ import com.rtbishop.look4sat.feature.satellites.SatellitesDestination
 import com.rtbishop.look4sat.feature.settings.SettingsDestination
 
 @Composable
-fun MainScreen() {
+fun NavRoot(deeplink: String? = null) {
+    val rootBackStack = rememberNavBackStack(Screen.Passes)
+    val deeplinkResolver = DeeplinkResolver()
+    LaunchedEffect(deeplink) {
+        deeplink?.let {
+            val destination = deeplinkResolver.resolve(it) // rootBackStack.clear()
+            rootBackStack.add(destination)
+        }
+    }
+    val navigateBack: () -> Unit = { rootBackStack.removeLastOrNull() }
+    val slideInTransition = slideInHorizontally(initialOffsetX = { it }) togetherWith scaleOut(targetScale = 0.9f)
+    val slideOutTransition = scaleIn(initialScale = 0.9f) togetherWith slideOutHorizontally(targetOffsetX = { it })
+    NavDisplay(
+        modifier = Modifier.fillMaxSize(),
+        backStack = rootBackStack,
+        onBack = navigateBack,
+        transitionSpec = { slideInTransition },
+        popTransitionSpec = { slideOutTransition },
+        predictivePopTransitionSpec = { slideOutTransition },
+        entryDecorators = listOf(
+            rememberSaveableStateHolderNavEntryDecorator(), // Required for saving Compose state per entry
+            rememberViewModelStoreNavEntryDecorator() // Required for ViewModel scoping per entry
+        ),
+        entryProvider = entryProvider {
+            entry<Screen.Passes> { MainScreen(navigateToRadar = { rootBackStack.add(RadarDestination) }) }
+            entry<RadarDestination> {
+                Scaffold { innerPadding ->
+                    RadarDestination(navigateUp = navigateBack)
+                    innerPadding.calculateTopPadding()
+                }
+            }
+        }
+    )
+}
+
+@Composable
+fun MainScreen(navigateToRadar: () -> Unit = {}) {
     val backStack = rememberNavBackStack(Screen.Passes)
     val currentKey = backStack.lastOrNull()
-    val navigateBack: () -> Unit = { if (backStack.size > 1) backStack.removeAt(backStack.size - 1) }
+    val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
     val fadeTransition = fadeIn(animationSpec = tween(350)) togetherWith fadeOut(animationSpec = tween(350))
-//    val slideInTransition = slideInHorizontally(initialOffsetX = { it }) togetherWith scaleOut(targetScale = 0.9f)
-//    val slideOutTransition = scaleIn(initialScale = 0.9f) togetherWith slideOutHorizontally(targetOffsetX = { it })
     val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Map, Screen.Settings)
 
     val context = LocalContext.current
@@ -139,6 +182,7 @@ fun MainScreen() {
                         PassesDestination { catNum, aosTime ->
                             container.satelliteRepo.selectPass(catNum, aosTime)
                             backStack.add(Screen.Radar)
+//                            navigateToRadar()
                         }
                     }
                     entry<Screen.Radar> {

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/Navigation.kt

@@ -38,3 +38,33 @@ sealed class Screen(val iconResId: Int, val titleResId: Int) : NavKey {
     @Serializable
     data object Settings : Screen(R.drawable.ic_settings, R.string.nav_prefs)
 }
+
+@Serializable
+data object RadarDestination : NavKey
+
+interface IDeeplinkMatcher {
+    fun match(deeplink: String): NavKey?
+}
+
+object PassDetailsMatcher : IDeeplinkMatcher {
+    val passDetailsRegex = """https://github.com/rt-bishop/Look4Sat/passes/(.*)""".toRegex()
+
+    override fun match(deeplink: String): NavKey? {
+        val passMatch = passDetailsRegex.find(deeplink)
+        passMatch?.let { match ->
+            val passId = match.groupValues[1]
+            if (passId.isNotEmpty()) return RadarDestination
+        }
+        return null
+    }
+}
+
+class DeeplinkResolver(private val fallbackDestination: NavKey = Screen.Passes) {
+
+    private val matchers: List<IDeeplinkMatcher> = listOf(PassDetailsMatcher)
+
+    fun resolve(deeplink: String): NavKey {
+        matchers.forEach { it.match(deeplink)?.let { match -> return match } }
+        return fallbackDestination
+    }
+}

core/presentation/src/test/java/com/rtbishop/look4sat/core/presentation/DeeplinkResolverTest.kt

@@ -0,0 +1,39 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.presentation
+
+import org.junit.Test
+
+class DeeplinkResolverTest {
+
+    @Test
+    fun returnsDefaultDestination() {
+        val deeplinkResolver = DeeplinkResolver()
+        val result = deeplinkResolver.resolve("/deeplink")
+        assert(result == Screen.Passes)
+    }
+
+    @Test
+    fun returnsRadarDestination() {
+        val passId = "some-pass-id"
+        val passDeeplink = "https://github.com/rt-bishop/Look4Sat/passes/$passId"
+        val deeplinkResolver = DeeplinkResolver()
+        val result = deeplinkResolver.resolve(passDeeplink)
+        assert(result == RadarDestination)
+    }
+}