182 lines
7.4 KiB
Racket
182 lines
7.4 KiB
Racket
#lang racket
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;; ------------------------------------------------
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;; values
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;; ------------------------------------------------
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(define nicethings-string ".nicethings")
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(define home-directory (find-system-path 'home-dir))
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(define listof-home-contents (directory-list home-directory))
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(define nicethings-path-local (build-path home-directory nicethings-string))
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;; ------------------------------------------------
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;; messages
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;; ------------------------------------------------
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(define messages
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(hash
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'not-found "> '~a' wasn't found."
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'repair-prompt "> You will need it to use nicethings.\n> Do you want to create it? [y/n]\n> "
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'fake-file-found "> The directory '~a' was found.\n> Please move this file somewhere else before using nicethings."
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'try (list "> For usage help, try running the following command:"
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"nicethings --help")
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'cancel-creation "> Cancelled nicethings file creation."
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'file-created "> '~a' was successfully created."
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'not-an-option "> Error: '~a' is not an option."
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'add-expected-arg (list "> Error: Found 'add', but no arguments were found."
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"> The 'add' command expects one quoted argument after it."
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"> Example:"
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"nicethings add \"You are beautiful\".")
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'rm-expected-arg (list "> Error: Found 'rm', but no arguments were found."
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"> The 'rm' command expects one number as an argument after it."
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"> Example:"
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"nicethings rm 2"
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"> Note: You may need to use the 'ls' command to see which number correlates to which message.")
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'ls-expected-no-args (list "> Error: Found 'ls', but also found other arguments."
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"> The 'ls' command expects no arguments after it."
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"> Example:"
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"nicethings ls")
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;; I don't currently use this message yet:
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'rm-expected-number (list "> Error: Found '~a' after 'rm'."
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"> The 'rm' command expects one number as an argument after it."
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"> Example:"
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"nicethings rm 2"
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"> Note: You may need to use the 'ls' command to see which number correlates to which message.")
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'added "> Added '~a' to the list."))
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;; ------------------------------------------------
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;; helpers
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;; ------------------------------------------------
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(define (displayln-for . strings)
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(for ([string strings])
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(displayln string)))
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(define-syntax-rule (displayln-format str ...)
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(displayln (format str ...)))
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(define (messages-ref key)
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(hash-ref messages key))
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;; ------------------------------------------------
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;; repair
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;; ------------------------------------------------
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(define (repair/not-an-option user-input)
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(displayln-format (messages-ref 'not-an-option) user-input)
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(exit))
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(define (repair/cancel)
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(displayln (messages-ref 'cancel-creation))
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(exit))
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;; Check for a "fake" '.nicethings' file,
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;; which is a directory named '.nicethings'
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(define (repair/start)
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(if (directory-exists? nicethings-path-local)
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(begin (displayln-format (messages-ref 'fake-file-found) nicethings-path-local)
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(exit))
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(begin (close-output-port (open-output-file nicethings-path-local))
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(displayln-format (messages-ref 'file-created) nicethings-path-local))))
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(define (repair/prompt)
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(display (messages-ref 'repair-prompt))
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(let ([user-input (read-line)])
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(case (string->symbol user-input)
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['y (repair/start)]
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['n (repair/cancel)]
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[else (repair/not-an-option user-input)])))
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(define (repair)
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(when (not (file-exists? nicethings-path-local))
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(displayln-format (messages-ref 'not-found) nicethings-path-local)
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(repair/prompt)))
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;; ------------------------------------------------
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;; add message
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;; ------------------------------------------------
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;; The string-cleaned and -remade is incase there
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;; are multiple newline characters. This ensures
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;; there is only one newline character.
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(define (add string)
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(repair)
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(let* ([string-no-newline (string-replace string "\n" "")]
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[string-newline (string-append string-no-newline "\n")])
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;; tell user item was added
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(display-to-file string-newline
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nicethings-path-local
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#:exists 'append)
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(displayln-format (messages-ref 'added) string-no-newline)))
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;; ------------------------------------------------
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;; random message
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;; ------------------------------------------------
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;; The +1 includes the last element in the list
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(define (random-message)
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(repair)
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;; TODO: Don't use local path here. turn into global
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;; Algo:
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;; gather all directories in /home/ -> list
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;; filter file-exists? /home/directory/.nicethings -> list
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;; NOTES:
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;; /home
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;;(define root-home (build-path (find-system-path 'sys-dir) "home"))
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;; '(/home/username _ ...)
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;;(map path->complete-path (directory-list root-home))
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;;;;;;;;;;;;;;
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;; NOTES2:
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;;(define root-home (build-path (find-system-path 'sys-dir) "home"))
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;;(map (lambda (x) (build-path root-home x)) (directory-list root-home))
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;;;;;;;;;;;;
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(let* ([root-home (build-path (find-system-path 'sys-dir) "home")]
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[paths-to-nicethings (map (lambda (home-directory) (build-path root-home home-directory nicethings-string))
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(directory-list root-home))])
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(filter (lambda (x) (file-exists? x)) paths-to-nicethings)))
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;; [listof-paths (map (lambda (path) (filter file-exists? path)) paths-to-nicethings)])
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;; (when (not (zero? list-length))
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;; (let* ([random-number (random list-length)]
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;; [random-nicething (list-ref listof-nicethings random-number)])
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;; (displayln random-nicething)))))
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;; ------------------------------------------------
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;; help
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;; ------------------------------------------------
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(define (help)
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(displayln-for
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"Usage:"
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" town nicethings [<command>] [<args>]"
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""
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"Commands:"
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" No command - Print a random nice thing."
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" add - Add a message to the list of nice things."
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" ls - Print a numbered list of the nice things you have added."
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" rm - Remove a message you have added from the list of nice things."
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""
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"Examples:"
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" town nicethings"
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" town add \"You are beautiful\""
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" town ls"
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" town rm 2"))
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(define (process-args vectorof-args)
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(define (args-ref number)
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(vector-ref vectorof-args number))
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(define (display-message key)
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(apply displayln-for (messages-ref key)))
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(match vectorof-args
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;; Proper usage
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[(or '#("-h")
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'#("--help")
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'#("help")) (help)]
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[(vector "add" _) (add (args-ref 1))]
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[(vector "rm" _) (displayln "todo: make rm procedure")]
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[(vector "ls") (displayln "todo: make ls procedure")]
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[(vector) (random-message)]
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;; Improper usage (Give the user hints if part of the usage is correct)
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[(vector "ls" _) (display-message 'ls-expected-no-args)]
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[(vector "add") (display-message 'add-expected-arg)]
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[(vector "rm") (display-message 'rm-expected-arg)]
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[(vector _ ...) (display-message 'try)]))
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(define (main vectorof-args)
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(process-args vectorof-args))
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(main (current-command-line-arguments))
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