Add basic linux notification support

src/main.rs

@@ -4,6 +4,7 @@ use crate::matcher::Matcher;
 use crate::matcher::scrolling::ScrollingMatcher;
 use crate::engine::Engine;
 use crate::config::Configs;
+use crate::ui::UIManager;
 use std::thread;
 use clap::{App, Arg};
 use std::path::Path;
@@ -50,7 +51,8 @@ fn main() {
 }
 
 fn espanso_main(configs: Configs) {
-    let ui_manager = UIManager::new();
+    let ui_manager = ui::get_uimanager();
+    ui_manager.notify("Hello guys");
 
     let (txc, rxc) = mpsc::channel();
 

src/ui/linux.rs

@@ -0,0 +1,25 @@
+use std::process::Command;
+
+pub struct LinuxUIManager {
+
+}
+
+impl super::UIManager for LinuxUIManager {
+    fn initialize(&self) {
+        // TODO: check if notify-send is present and log an error otherwise.
+    }
+
+    fn notify(&self, message: &str) {
+        let res = Command::new("notify-send")
+                        .args(&["-t", "2000", "espanso", message])
+                        .output();
+
+        if let Err(_) = res {
+            // TODO: print error log
+        }
+    }
+}
+
+impl LinuxUIManager {
+
+}

src/ui/mod.rs

@@ -10,16 +10,20 @@ mod macos;
 pub trait UIManager {
     fn initialize(&self);
     fn notify(&self, message: &str);
-
-    fn new() -> impl UIManager {
-        let manager = get_uimanager();
-        manager.initialize();
-        manager
-    }
 }
 
 // MAC IMPLEMENTATION
 #[cfg(target_os = "macos")]
-fn get_uimanager() -> impl UIManager {
-    macos::MacUIManager{}
+pub fn get_uimanager() -> impl UIManager {
+    let manager = macos::MacUIManager{};
+    manager.initialize();
+    manager
+}
+
+// LINUX IMPLEMENTATION
+#[cfg(target_os = "linux")]
+pub fn get_uimanager() -> impl UIManager {
+    let manager = linux::LinuxUIManager{};
+    manager.initialize();
+    manager
 }