dit: when first arg is dit display unix timestamp

dit/src/main.rs

@@ -1,24 +1,26 @@
+use libdit::libdit::dit_struct_to_unix;
 pub use libdit::libdit::unix_to_dit_string;
 use libdit::libdit::Dit;
 pub use libstardit::libstardit::unix_to_stardit;
+use std::env;
+use std::process::exit;
 use std::str::FromStr;
 pub use std::time::{SystemTime, UNIX_EPOCH};
 
 fn main() {
-	/*
-		let code: &str = &r"0.12.34";
-		match Dit::from_str(code) {
-			Ok(dit) => {
-				println!(
-					r"Dit: deca: {} decim: {} desec: {}",
-					dit.deca, dit.decim, dit.desec
-				);
-			}
-			Err(_) => {
-				println!("{} is not a valid DIT!", code);
-			}
+	let args: Vec<String> = env::args().collect();
+
+	match args.len() {
+		1 => current(),
+		2 => parse(args[1].to_string()),
+		_ => {
+			eprintln!("Wrong usage");
+			exit(1);
 		}
-	*/
+	}
+}
+
+fn current() {
 	let current_timestamp = SystemTime::now()
 		.duration_since(UNIX_EPOCH)
 		.unwrap()
@@ -31,6 +33,18 @@ fn main() {
 		unix_to_dit_string(current_timestamp),
 		stardit.year,
 		stardit.weekade,
-		stardit.day_name
+		stardit.day_name,
 	);
 }
+
+fn parse(arg: String) {
+	match Dit::from_str(&arg) {
+		Ok(dit) => {
+			println!("{}", dit_struct_to_unix(dit));
+		}
+		Err(_) => {
+			eprintln!("{} is not a valid DIT!", arg);
+			exit(1);
+		}
+	}
+}