mtgc/src-tauri/src/lib.rs

mod commands;
mod news;
mod state;
mod sync;

use std::sync::Mutex;

use tauri::Manager;

use state::AppState;

/// Write a line to the platform log.
///
/// On Android this reaches `adb logcat` under the tag `RustStdoutStderr`: tao's
/// Android glue `dup2`s stdout/stderr into a pipe and forwards each line to the
/// system log, so a plain `eprintln!` is all that's needed and no logging
/// dependency is warranted. On desktop it's just stderr.
///
/// This matters because Tauri command failures are *returned* to the WebView as
/// values, not raised — so without logging them explicitly they never appear in
/// logcat at all, and the UI only ever shows a truncated version.
#[macro_export]
macro_rules! mlog {
    ($($arg:tt)*) => { eprintln!("[mtgc] {}", format_args!($($arg)*)) };
}

/// Log a command failure (with its full, untruncated message) and pass the
/// result through unchanged.
pub(crate) fn logged<T>(what: &str, result: Result<T, String>) -> Result<T, String> {
    if let Err(e) = &result {
        crate::mlog!("{what} failed: {e}");
    }
    result
}

/// Register the Kotlin-side `SyncPlugin` and stash its handle in app state, so
/// the sync commands can call across to SAF. See `sync.rs` for why library sync
/// goes through a Java plugin rather than plain `std::fs`.
#[cfg(target_os = "android")]
fn sync_plugin() -> tauri::plugin::TauriPlugin<tauri::Wry> {
    tauri::plugin::Builder::new("mtgc-sync")
        .setup(|app, api| {
            let handle = api.register_android_plugin("com.garrettmills.mtgc", "SyncPlugin")?;
            app.manage(sync::SyncBridge(handle));
            Ok(())
        })
        .build()
}

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    let builder = tauri::Builder::default().plugin(tauri_plugin_dialog::init())
        .plugin(tauri_plugin_opener::init());
    #[cfg(target_os = "android")]
    let builder = builder.plugin(sync_plugin());

    builder
        .setup(|app| {
            let data_dir = app
                .path()
                .app_data_dir()
                .expect("resolve app data dir");
            std::fs::create_dir_all(&data_dir).ok();
            mlog!("data dir: {}", data_dir.display());
            app.manage(Mutex::new(AppState::new(data_dir)));
            Ok(())
        })
        .invoke_handler(tauri::generate_handler![
            commands::get_status,
            commands::update_card_data,
            commands::cancel_update_card_data,
            commands::import_reference_db,
            sync::sync_status,
            sync::sync_pick_folder,
            sync::sync_set_document,
            sync::sync_list_documents,
            sync::sync_set_document_name,
            sync::sync_forget_document,
            sync::sync_now,
            sync::convert_legacy_library,
            news::get_news,
            news::get_set_cards,
            commands::search_cards,
            commands::add_owned,
            commands::set_owned,
            commands::set_location,
            commands::search_library,
            commands::search_reference,
            commands::get_library_stats,
            commands::get_library_facets,
            commands::get_reference_facets,
            commands::list_decks,
            commands::create_deck,
            commands::delete_deck,
            commands::rename_deck,
            commands::duplicate_deck,
            commands::set_deck_format,
            commands::set_deck_commander,
            commands::set_deck_card,
            commands::deck_contents,
            commands::suggest_cards,
            commands::card_decks,
            commands::export_deck,
            commands::import_deck,
            commands::export_library_cards,
            commands::import_library_cards,
        ])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}