Architecture Overview

Layers

Layer	Technology	Role
Frontend	SolidJS + Kobalte + Vite	UI (dashboard / settings / updates / licenses)
Backend	Rust / Tauri v2	Media retrieval, Discord integration, settings management
Android native	Kotlin	Notification access, foreground service, JNI bridge

Directories

src/                          Frontend (SolidJS)
  components/                 UI components (panels, cards, etc.)
  locales/{ja,en}.json        i18n strings (auto-selected from OS language at startup)
src-tauri/
  src/
    adb/                      ADB client and dumpsys parser
    apk_label/                App name resolution by pulling APKs (+disk cache)
    artwork/                  ArtworkResolver plugin group (Niconico, YouTube, etc.)
    android/discord.rs        C FFI wrapper for the Discord Social SDK
    commands/app.rs           IPC commands exposed to the frontend
    tray.rs, config.rs ...    Tray / settings / i18n / shutdown handling
  gen/android/                Android project (Kotlin)
    app/src/main/java/...     MediaCollectorService (notification access) /
                              MediaInfoService (FGS) / MediaBridge (JNI) etc.
site/                         Documentation site (Astro Starlight)
scripts/                      Build helper scripts (license generation, etc.)

Main Data Flows

• Desktop: the adb module parses dumpsys media_session → frontend fetches via the IPC command get_media_info every 5 seconds → updates Discord IPC only on change
• Android: Kotlin-side events (notification posted/removed + a 30-second safety timer) flow into Rust through the JNI MediaBridge.updateMediaInfo and are delivered to the frontend as the Tauri event media-updated (normally event-driven, with a 30-second safety polling interval as backup)

IPC Command List

Tauri commands callable from the frontend (commands/app.rs):

Command	Environment	Purpose
get_adb_status	Desktop	Get ADB connection status
get_media_info	Common	Get current media information
connect_discord / disconnect_discord	Common	Control the Discord connection
update_discord_presence	Common	Update Rich Presence
get_discord_status	Common	Get Discord connection status
get_rpc_enabled / set_rpc_enabled	Android	Persist the RPC toggle
get_settings / update_settings	Common	Read/write settings
list_media_apps	Android (empty-array stub on desktop)	List apps for the whitelist
get_notification_access_status / open_notification_access_settings	Android (success-path stubs on desktop)	Check & open notification access permission
get_signing_fingerprint	Android (None on desktop)	Get the APK signing fingerprint
check_android_update / download_android_update / install_android_update	Android	Check, download, and install Android updates
get_install_permission_status / open_install_permission_settings	Android	Check & open the unknown-apps install permission

Key External Dependencies

• adb_client — ADB protocol
• discord-rich-presence — desktop Discord IPC
• Discord Social SDK (Android) — not committed to the repository due to its terms; CI downloads it each time (see Release)

For design philosophy and implementation details, see also the comments in the source code.