added happy mood

Signed-off-by: Ran Regev <[email protected]>

Author: Ran Regev

src/lib.rs

@@ -39,7 +39,8 @@ const BUFSIZE: usize = 2048;
 #[derive(Copy, Debug, Clone, PartialEq, Eq, ValueEnum)]
 pub enum Moods {
     Natural,
-    Sad
+    Sad,
+    Happy
 }
 
 /// Print out Ferris saying something.
@@ -149,11 +150,15 @@ where
     }
 
     // mascot
-
+    let re = regex::bytes::Regex::new(r"'_   -   _'").unwrap();
     match mood {
         Moods::Sad => {
             let new_face: &[u8] =  br#"'_  ~~~  _'"#;
-            let re = regex::bytes::Regex::new(r"'_   -   _'").unwrap();
+            let new_mascot_face = re.replace(MASCOT, new_face);
+            write_buffer.extend_from_slice(new_mascot_face.as_ref());
+        }
+        Moods::Happy => {
+            let new_face: &[u8] =  br#"'_  \_/  _'"#;
             let new_mascot_face = re.replace(MASCOT, new_face);
             write_buffer.extend_from_slice(new_mascot_face.as_ref());
         }