87 lines
3.0 KiB
Racket
Executable File
87 lines
3.0 KiB
Racket
Executable File
#! /usr/bin/env racket
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#lang racket/base
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(require json racket/vector)
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;; set the name of the program here
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(define program-name "rodo")
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;; set which path the program will live in
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(define program-path "~/.")
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;; because I don't want to type `(display (hash-ref...` over and over again
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(define (d-hash-ref hash-list key)
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(displayln (hash-ref hash-list key)))
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#|(define (add-to-list)
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(let ([args (vector-ref (current-command-line-arguments) 1)])
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(string-append "> Added " args " to list")))
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(define (remove-from-list)
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(let ([args (vector-ref (current-command-line-arguments) 1)])
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(string-append "> Removed " args " from list")))
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|#
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;; define all messages for quick access
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(define messages
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(hash
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'incorrect-usage (string-append "> For usage type `" program-name " -h` or `" program-name " --help`")
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'file-not-found (string-append "> " program-name " has not been setup in your home directory\n> Would you like to set it up now? [y/n]")
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'file-exists (string-append "> ." program-name " file exists")
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'creating-file (string-append "> Creating ." program-name " file in your home directory...")
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'item-added "> Added item to list"
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'item-removed "> Added item to list"
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'initializing (string-append "> Initializing " program-name " in your home directory")
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'terminating (string-append "> Exiting " program-name "...")
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'choose-y/n "> Error: Please choose y or n"))
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;; some possible user-input related "mistakes" that will be accepted for input
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(define y/n
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(hash
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'yes '("yes" "Yes" "y" "Y")
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'no '("no" "No" "n" "N")))
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;; yet again, less typing for opening a file
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(define (open/create-file path)
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(let ([path (expand-user-path path)])
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(let ([opened-file (open-output-file path
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#:mode 'text
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#:exists 'can-update)])
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(close-output-port opened-file))))
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;; talk with user if something goes wrong/right
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(define (prompt-initialize prompt-message)
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(d-hash-ref messages prompt-message)
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(display "> ")
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(let ([user-input (read-line)])
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(cond
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[(member user-input (hash-ref y/n 'yes))
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(d-hash-ref messages 'creating-file)
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(open/create-file (string-append program-path program-name))]
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[(member user-input (hash-ref y/n 'no))
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(d-hash-ref messages 'terminating)]
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[else
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(d-hash-ref messages 'choose-y/n)
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(prompt-initialize 'file-not-found)])))
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(define (check-args args)
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(let ([args-length (vector-length args)])
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(cond
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[(or (equal? args-length 0) (> args-length 2))
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(d-hash-ref messages 'incorrect-usage)]
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[(and (equal? args-length 2) (equal? (vector-member "add" args) 0))
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(d-hash-ref messages 'item-added)]
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[(and (equal? args-length 1) (equal? (vector-member "init" args) 0))
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(todo-list-exist?)])))
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(define (todo-list-exist?)
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(if (file-exists? (expand-user-path (string-append program-path program-name)))
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(d-hash-ref messages 'file-exists)
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(prompt-initialize 'file-not-found)))
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(define (main)
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(check-args (current-command-line-arguments)))
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(main)
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