too many things added

rodo.rkt

@@ -1,6 +1,6 @@
 #! /usr/bin/env racket
 #lang racket/base
-(require json)
+(require json racket/vector)
 
 ;; set the name of the program here
 (define program-name "rodo")
@@ -12,6 +12,14 @@
 (define (displayln-hash-ref hash-list key)
   (displayln (hash-ref hash-list key)))
 
+;; (define (add-to-list)
+;;  (let ([args (vector-ref (current-command-line-arguments) 1)])
+;;    (string-append "> Added " args " to list")))
+
+;;(define (remove-from-list)
+;;  (let ([args (vector-ref (current-command-line-arguments) 1)])
+;;    (string-append "> Removed " args " from list")))
+
 ;; define all messages for quick access
 (define messages 
   (hash 
@@ -20,12 +28,9 @@
     'file-exists (string-append "> ." program-name " file exists")
     'creating-file (string-append "> Creating ." program-name " file in your home directory...")
 
-    ;; temporary thing
-    'item-added (string-append "> Added ") 
+    'item-added "> Added item to list" 
+    'item-removed "> Added item to list"
 
-    ;; todo change `item` to command-line argument for add and remove
-    ;; 'item-added (string-append "> Added " (vector-ref (current-command-line-arguments) 1)) 
-    ;; 'item-removed "> Item removed" ;; todo change `item` to command-line argument
     'initializing (string-append "> Initializing " program-name " in your home directory")
     'terminating (string-append "> Exiting " program-name "...")
     'choose-y/n "> Error: Please choose y or n"))
@@ -45,7 +50,7 @@
       (close-output-port opened-file))))
 
 ;; talk with user if something goes wrong/right 
-(define (prompt-user prompt-message)
+(define (prompt-initialize prompt-message)
   (displayln-hash-ref messages prompt-message)
   (display "> ")
   (let ([user-input (read-line)])
@@ -57,27 +62,24 @@
        (displayln-hash-ref messages 'terminating)]
       [else 
         (displayln-hash-ref messages 'choose-y/n)
-        (prompt-user 'file-not-found)])))
-
-(define (add-to-list args)
-  ;; (let ([item (vector-ref args 1)])
-  (displayln-hash-ref messages 'item-added))
+        (prompt-initialize 'file-not-found)])))
 
 (define (check-args args)
-  (vector-length (args)))
+  (let ([args-length (vector-length args)])
+    (cond
+      [(or (equal? args-length 0) (> args-length 2))
+       (displayln-hash-ref messages 'incorrect-usage)]
+      [(and (equal? args-length 2) (equal? (vector-member "add" args) 0))
+       (displayln-hash-ref messages 'item-added)]
+      [(and (equal? args-length 1) (equal? (vector-member "init" args) 0))
+       (todo-list-exist?)])))
 
 (define (todo-list-exist?)
   (if (file-exists? (expand-user-path (string-append program-path program-name)))
     (displayln-hash-ref messages 'file-exists)
-    (prompt-user 'file-not-found)))
+    (prompt-initialize 'file-not-found)))
 
-;; todo get command-line args
-#|(define (todo-list-exist?)
-    (if (file-exists? (expand-user-path (string-append program-path program-name)))
-      (begin
-        (displayln-hash-ref messages 'file-exists)
-        (add-to-list (current-command-line-arguments)))
-      (prompt-user 'file-not-found)))
-|#
+(define (main)
+(check-args (current-command-line-arguments)))
 
-(todo-list-exist?)
+(main)