get base4::decode working

src/base4.rs

@@ -29,12 +29,42 @@ pub fn encode(text: String) -> String {
     for i in 0..words_as_bytes.len() {
         results.push(Vec::new());
         for j in 0..words_as_bytes[i].len() {
-            results[i].push(core::num_to_cat(words_as_bytes[i][j] as u32, alphabet(), char_length()));
+            results[i].push(core::num_to_cat(
+                words_as_bytes[i][j] as u32,
+                alphabet(),
+                char_length(),
+            ));
         }
     }
 
     let results: Vec<String> = results.into_iter().map(|item| item.join(" ")).collect();
     let results = results.join("; ");
     return results;
-
+}
+
+/// Decodes base 4 catspeak to english text
+/// 
+/// ```
+/// use cat2text::base4::decode;
+/// 
+/// assert_eq!("i love cats", decode("meow mreow mrrp; meow mrow meow meow mrow mrow mrrp mrrp mreow meow mrrp mrrp; meow meow mrow meow meow mrrp mrrp mrrp meow mrrp meow mrow".to_string()));
+/// ```
+pub fn decode(text: String) -> String {
+    let catspeak_words: Vec<String> = text
+        .split("; ")
+        .into_iter()
+        .map(|item| item.to_string())
+        .collect();
+    let mut output: String = String::new();
+    for engl_word in catspeak_words {
+        let mut word = "".to_string();
+        for engl_letter in core::split_every_3(engl_word) {
+            let char_num = core::cat_to_num(engl_letter.split(" ").map(|item| item.to_string()).collect(), alphabet(), char_length());
+            word += String::from_utf8(vec![(char_num + 96) as u8]).unwrap().as_str();
+        }
+        word += " ";
+        output += word.as_str();
+    }
+
+    return output.trim().to_string();
 }

src/main.rs

@@ -18,11 +18,9 @@ fn main() {
             stdin.read_line(&mut input).unwrap();
             println!(
                 "{}",
-                core::num_to_cat(
-                    input.trim().parse().unwrap(),
-                    base4::alphabet(),
-                    base4::char_length()
-                )
+                base4::decode(
+                    input.trim().to_string()
+                    )
             );
         } else if trimmed == "2".to_string() {
             input = "".to_string();