Add the option for the gamma cipher.

src/cipher_analytical_machine/cli/actions/cryptography.clj

@@ -44,12 +44,15 @@
   [options arguments action-type]
   (let [message (:message options)
         key (->> (cs/split (:key options) #",")
-                (map #(Integer/parseInt %)))
+                 (map #(Integer/parseInt %))
+                 (into []))
         symbols (:symbols options)]
     (cond
       (= action-type :encrypt)
       (gamma/encrypt-message key symbols message)
-      )))
+
+      (= action-type :decrypt)
+      (gamma/decrypt-message key symbols message))))
 
 (defn cryptography-actions
   [options arguments action-type]

src/cipher_analytical_machine/cli/options.clj

@@ -22,7 +22,7 @@
     (option-values-as-list option values)))
 
 (def cipher-options
-  #{"Caesar" "Simple substitution and Caesar"})
+  #{"Caesar" "Simple substitution and Caesar" "Gamma"})
 
 (def default-cipher "Caesar")