refactor: extract constants

src/args.rs

@@ -1,5 +1,16 @@
 use std::env;
 
+use crate::constants::{DEFAULT_BREAK_MINS, DEFAULT_WORK_MINS};
+
+pub const FLAG_HELP: &str = "-h";
+pub const FLAG_HELP_LONG: &str = "--help";
+pub const FLAG_VERSION: &str = "-v";
+pub const FLAG_VERSION_LONG: &str = "--version";
+pub const FLAG_NOTIFY: &str = "-n";
+pub const FLAG_NOTIFY_LONG: &str = "--notify";
+pub const FLAG_VISUALIZER: &str = "-z";
+pub const FLAG_VISUALIZER_LONG: &str = "--visualizer";
+
 #[derive(Debug, PartialEq, Eq)]
 pub struct CliConfig {
   pub work_mins: u32,
@@ -30,10 +41,10 @@ impl Cli {
 
     for arg in args.into_iter().skip(1) {
       match arg.as_str() {
-        "-h" | "--help" => return CliAction::PrintHelp,
-        "-v" | "--version" => return CliAction::PrintVersion,
-        "-n" | "--notify" => enable_notifications = true,
-        "-z" | "--visualizer" => enable_visualizer = true,
+        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_VISUALIZER | FLAG_VISUALIZER_LONG => enable_visualizer = true,
         "--" => {}
         s if s.starts_with('-') => {
           return CliAction::Error(format!("Unknown option: '{}'", s));
@@ -47,8 +58,8 @@ impl Cli {
       .filter_map(|s| s.parse::<u32>().ok())
       .collect();
 
-    let work_mins = numbers.first().copied().unwrap_or(25);
-    let break_mins = numbers.get(1).copied().unwrap_or(5);
+    let work_mins = numbers.first().copied().unwrap_or(DEFAULT_WORK_MINS);
+    let break_mins = numbers.get(1).copied().unwrap_or(DEFAULT_BREAK_MINS);
 
     if numbers.len() > 2 {
       return CliAction::Error(format!("Unexpected argument: '{}'", positional[2]));
@@ -64,14 +75,37 @@ impl Cli {
 
   pub fn print_help() {
     println!("Usage: termato [options] [work_minutes] [break_minutes]");
+
     println!();
+
     println!("Options:");
-    println!("  -n, --notify      Enable desktop notifications");
-    println!("  -z, --visualizer  Display visualizer of playing audio");
-    println!("  -h, --help        Print this help message");
-    println!("  -v, --version     Print the version number");
+
+    println!(
+      "  {:<19} Enable desktop notifications",
+      format_args!("{}, {}", FLAG_NOTIFY, FLAG_NOTIFY_LONG)
+    );
+
+    println!(
+      "  {:<19} Display visualizer of playing audio",
+      format_args!("{}, {}", FLAG_VISUALIZER, FLAG_VISUALIZER_LONG)
+    );
+
+    println!(
+      "  {:<19} Print this help message",
+      format_args!("{}, {}", FLAG_HELP, FLAG_HELP_LONG)
+    );
+
+    println!(
+      "  {:<19} Print the version number",
+      format_args!("{}, {}", FLAG_VERSION, FLAG_VERSION_LONG)
+    );
+
     println!();
-    println!("Defaults: work_minutes = 25, break_minutes = 5");
+
+    println!(
+      "Defaults: work_minutes = {}, break_minutes = {}",
+      DEFAULT_WORK_MINS, DEFAULT_BREAK_MINS
+    );
   }
 
   pub fn print_version() {