App architecture modifications.

Now GUI and the app itself is divided into two different binaries.
The app also provides system tray icon.
Whereas the GUI can be used to configure the app.

app/src/_main.rs

@@ -0,0 +1,92 @@
+
+
+#[macro_use]
+extern crate lazy_static; // better switch to once_cell ?
+use pickledb::{PickleDb, PickleDbDumpPolicy, SerializationMethod};
+use log::{info};
+use log::LevelFilter;
+use std::sync::Mutex;
+
+// include assistant commands
+mod assistant_commands;
+use assistant_commands::AssistantCommand;
+
+// include vosk
+mod vosk;
+
+// include events
+mod events;
+
+// include recorder
+mod recorder;
+
+// init PickleDb connection
+lazy_static! {
+    static ref DB: Mutex<PickleDb> = Mutex::new(
+        PickleDb::load(
+            format!("{}/{}", APP_CONFIG_DIR.lock().unwrap(), DB_FILE_NAME),
+            PickleDbDumpPolicy::AutoDump,
+            SerializationMethod::Json
+        )
+        .unwrap_or_else(|_x: _| {
+            info!("Creating new db file at {} ...", format!("{}/{}", APP_CONFIG_DIR.lock().unwrap(), DB_FILE_NAME));
+            PickleDb::new(
+                format!("{}/{}", APP_CONFIG_DIR.lock().unwrap(), DB_FILE_NAME),
+                PickleDbDumpPolicy::AutoDump,
+                SerializationMethod::Json,
+            )
+        })
+    );
+}
+
+fn main() {
+    // init vosk
+    vosk::init_vosk();
+
+    // run the app
+    tauri::Builder::default()
+        .setup(|app| {
+            std::fs::create_dir_all(app.path_resolver().app_config_dir().unwrap())?;
+            APP_CONFIG_DIR.lock().unwrap().push_str(app.path_resolver().app_config_dir().unwrap().to_str().unwrap());
+
+            std::fs::create_dir_all(app.path_resolver().app_log_dir().unwrap())?;
+            APP_LOG_DIR.lock().unwrap().push_str(app.path_resolver().app_log_dir().unwrap().to_str().unwrap());
+
+            // log to file
+            let log_file_path = format!("{}/{}", APP_LOG_DIR.lock().unwrap(), config::LOG_FILE_NAME);
+            println!("!!!===============!!!\nLOGGING TO {}\n!!!===============!!!\n", &log_file_path);
+            simple_logging::log_to_file(&log_file_path, LevelFilter::max()).expect("Failed to start logger ... is directory writable?");
+
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            // db commands
+            tauri_commands::db_read,
+            tauri_commands::db_write,
+            // recorder commands
+            tauri_commands::pv_get_audio_devices,
+            tauri_commands::pv_get_audio_device_name,
+            // listener commands
+            tauri_commands::start_listening,
+            tauri_commands::stop_listening,
+            tauri_commands::is_listening,
+            // sys commands
+            tauri_commands::get_current_ram_usage,
+            tauri_commands::get_peak_ram_usage,
+            tauri_commands::get_cpu_temp,
+            tauri_commands::get_cpu_usage,
+            // sound commands
+            tauri_commands::play_sound,
+            // fs commands
+            tauri_commands::show_in_folder,
+            // etc commands
+            tauri_commands::get_app_version,
+            tauri_commands::get_author_name,
+            tauri_commands::get_repository_link,
+            tauri_commands::get_tg_official_link,
+            tauri_commands::get_feedback_link,
+            tauri_commands::get_log_file_path
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}