rodo/rodo.rkt

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#! /usr/bin/env racket
#lang racket/base
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(require racket/vector)
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(define program-name "rodo")
(define program-directory ".rodo/")
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(define program-path "~/")
(define (d-hash-ref hash-list key)
(display (hash-ref messages key)))
(define (d-vector-ref args key)
(display (vector-ref args key)))
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(define messages
(hash
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'incorrect-usage (string-append
"> For usage type "
"`" program-name " -h`"
" or "
"`" program-name " --help`\n")
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'creating (string-append
"> Creating a "
program-directory
" folder in "
program-path " ...\n")
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'creation-error (string-append
"> Error: Could not create "
program-directory
" in "
program-path ".\n"
"> This may be due to directory permissions\n")
'already-exists (string-append
"> "
program-directory
" folder already exists in "
program-path "\n")
'successfully-created (string-append
"> "
program-path program-directory
" has been successfully created\n")
'not-found (string-append
"> "
program-directory
" has not been setup in "
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program-path "\n")
'setup-y/n (string-append
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"> Would you like to set it up now? [y/n]\n")
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'try-initializing (string-append
"> Try typing "
"`" program-name
" init` "
"to set it up\n")
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'choose-y/n "> Error: Please choose y or n\n"
'item-added-prefix "> Added "
'item-added-suffix " to list\n"
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'item-removed-prefix "> Removed "
'item-removed-suffix " from list\n"
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'terminating (string-append "> Exiting " program-name " ...\n")))
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;; some possible user-input related "mistakes" that
;; will be accepted for input
(define y/n
(hash
'yes '("yes" "Yes" "y" "Y")
'no '("no" "No" "n" "N")))
(define (open/create-file list-name)
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(let ([path (expand-user-path (string-append
program-path
program-directory
list-name))])
(let ([opened-file (open-output-file path
#:mode 'text
#:exists 'can-update)])
(close-output-port opened-file))))
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(define (create-folder)
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(make-directory (expand-user-path (string-append
program-path
program-directory))))
(define (check-for-folder)
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(directory-exists? (expand-user-path (string-append
program-path
program-directory))))
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;; prompt user for file initial file creation
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(define (prompt-user chosen-message)
(d-hash-ref messages chosen-message)
(display "> ")
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(let ([user-input (read-line)])
(cond
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[(member user-input (hash-ref y/n 'yes))
(d-hash-ref messages 'creating)
(create-folder)
(if (check-for-folder)
(d-hash-ref messages 'successfully-created)
(d-hash-ref messages 'creation-error))]
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[(member user-input (hash-ref y/n 'no))
(d-hash-ref messages 'terminating)]
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[else
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(prompt-user 'choose-y/n)])))
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(define (add-item args)
(if (check-for-folder)
(begin
(d-hash-ref messages 'item-added-prefix)
(d-vector-ref args 1)
(d-hash-ref messages 'item-added-suffix))
(begin
(d-hash-ref messages 'not-found)
(d-hash-ref messages 'try-initializing))))
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(define (check-args args)
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(let ([args-length (vector-length args)])
(cond
[(and (equal? args-length 2) (equal? (vector-member "add" args) 0))
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(add-item args)]
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[(and (equal? args-length 2) (equal? (vector-member "remove" args) 0))
(d-hash-ref messages 'item-removed-prefix)
(d-vector-ref args 1)
(d-hash-ref messages 'item-removed-suffix)]
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[(and (equal? args-length 1) (equal? (vector-member "init" args) 0))
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(todo-folder-exist?)]
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[else (d-hash-ref messages 'incorrect-usage)])))
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;; does the file exist that holds the list(s?)
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(define (todo-folder-exist?)
(if (check-for-folder)
(d-hash-ref messages 'already-exists)
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(begin
(d-hash-ref messages 'not-found)
(prompt-user 'setup-y/n))))
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(define (main)
(check-args (current-command-line-arguments)))
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(main)