Navigation & Deep Links

The app uses Navigation 3 with typed, serializable routes and centralized deep link resolution.

Route Architecture

All routes are defined in core/navigation/src/commonMain/kotlin/org/meshtastic/core/navigation/Routes.kt.

Route Hierarchy

interface Route : NavKey           // All routes implement NavKey
interface Graph : Route            // Graph roots for navigation hierarchies

@Serializable
sealed interface SettingsRoute : Route {
    @Serializable data class Settings(val destNum: Int? = null) : SettingsRoute, Graph
    @Serializable data object DeviceConfiguration : SettingsRoute
    @Serializable data object HelpDocs : SettingsRoute
    @Serializable data class HelpDocPage(val pageId: String) : SettingsRoute
    // ...
}

Conventions

• Routes are @Serializable for state restoration
• Use data object for routes without parameters
• Use data class for parameterized routes
• Group related routes under a sealed interface
• Graph entry points implement both the route interface and Graph

Deep Link Router

DeepLinkRouter in core/navigation maps URI deep links to typed backstack lists.

URI Format

meshtastic://meshtastic/{path}

Supported Deep Links

URI Path	Route	Notes
/settings	SettingsRoute.Settings(null)	Settings root
/settings/helpDocs	SettingsRoute.HelpDocs	Docs browser
/settings/helpDocs/{pageId}	SettingsRoute.HelpDocPage(pageId)	Specific doc page
/settings/help-docs	SettingsRoute.HelpDocs	Compatibility alias
/nodes	NodesRoute.Nodes	Node list
/nodes/{destNum}	NodesRoute.NodeDetail(destNum)	Node detail
/messages/{contactKey}	ContactsRoute.Messages(contactKey)	Conversation
/map	MapRoute.Map(null)	Map view

Backstack Synthesis

Deep links synthesize a full backstack, not just the target screen:

// /settings/helpDocs/messages-and-channels produces:
listOf(
    SettingsRoute.Settings(null),
    SettingsRoute.HelpDocs,
    SettingsRoute.HelpDocPage("messages-and-channels"),
)

This ensures the user can navigate "up" correctly.

Adding a Deep Link

1. Define the typed route in Routes.kt.
2. Add the mapping in DeepLinkRouter.settingsSubRoutes (or equivalent for other graphs).
3. Add a test in DeepLinkRouterTest.kt.
4. Register the navigation entry in the appropriate feature module.

Navigation Entry Registration

Each feature module provides entries via an extension function:

fun EntryProviderScope<NavKey>.docsEntries(backStack: NavBackStack<NavKey>) {
    entry<SettingsRoute.HelpDocs> { DocsBrowserScreen(backStack) }
    entry<SettingsRoute.HelpDocPage> { route -> DocsPageRouteScreen(route.pageId, backStack) }
}

These are called from the settings navigation composition.

Testing

Deep link routing is tested in:

core/navigation/src/commonTest/kotlin/org/meshtastic/core/navigation/DeepLinkRouterTest.kt

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