feat: extend parser to support combining flag options

src/args.rs

@@ -47,12 +47,26 @@ impl Cli {
       match arg.as_str() {
         FLAG_HELP | FLAG_HELP_LONG => return CliAction::PrintHelp,
         FLAG_VERSION | FLAG_VERSION_LONG => return CliAction::PrintVersion,
-        FLAG_NOTIFY | FLAG_NOTIFY_LONG => enable_notifications = true,
         FLAG_SOUND | FLAG_SOUND_LONG => enable_sound = true,
         FLAG_VISUALIZER | FLAG_VISUALIZER_LONG => enable_visualizer = true,
         "--" => {}
+        s if s.starts_with("--") => match s {
+          FLAG_NOTIFY_LONG => enable_notifications = true,
+          FLAG_VISUALIZER_LONG => enable_visualizer = true,
+          FLAG_SOUND_LONG => enable_sound = true,
+          _ => return CliAction::Error(format!("Unknown option: '{}'", s)),
+        },
         s if s.starts_with('-') => {
-          return CliAction::Error(format!("Unknown option: '{}'", s));
+          for ch in s.chars().skip(1) {
+            match ch {
+              'h' => return CliAction::PrintHelp,
+              'v' => return CliAction::PrintVersion,
+              'n' => enable_notifications = true,
+              's' => enable_sound = true,
+              'z' => enable_visualizer = true,
+              _ => return CliAction::Error(format!("Unknown option: '-{}'", ch)),
+            }
+          }
         }
         s => positional.push(s.to_string()),
       }
@@ -213,4 +227,33 @@ mod tests {
       })
     );
   }
+
+  #[test]
+  fn test_combined_short_flags() {
+    let args = vec![
+      "termato".to_string(),
+      "-nsz".to_string(),
+      "25".to_string(),
+      "5".to_string(),
+    ];
+    assert_eq!(
+      Cli::parse_args(args),
+      CliAction::Run(CliConfig {
+        work_mins: 25,
+        break_mins: 5,
+        enable_notifications: true,
+        enable_sound: true,
+        enable_visualizer: true,
+      })
+    );
+  }
+
+  #[test]
+  fn test_combined_short_flags_with_invalid_char() {
+    let args = vec!["termato".to_string(), "-nxz".to_string()];
+    assert_eq!(
+      Cli::parse_args(args),
+      CliAction::Error("Unknown option: '-x'".to_string())
+    );
+  }
 }