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@ -8,17 +8,17 @@
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;; ------------------------------------------------
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;; Constants
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;; ------------------------------------------------
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(define help-command-1 "help")
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(define help-command-2 "--help")
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(define help-command-3 "-h")
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(define init-command "init")
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(define ls-command "ls")
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(define rm-command "rm")
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(define add-command "add")
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(define command-help-1 "help")
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(define command-help-2 "--help")
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(define command-help-3 "-h")
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(define command-init "init")
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(define command-ls "ls")
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(define command-rm "rm")
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(define command-add "add")
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(define program-name "nicethings")
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(define program-file (string-append "." program-name))
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(define program-path (path->string (build-path (find-system-path 'home-dir) program-file)))
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(define read-permissions 444)
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(define read-permissions 420)
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(define newline "\n")
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(define double-newline "\n\n")
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@ -30,13 +30,13 @@
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(format (string-append "Error: Too many arguments." newline
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"Try running '~a ~a' for more information.")
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program-name
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help-command-1)
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command-help-1)
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'error-incorrect-usage
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(format (string-append "Error: Incorrect usage." newline
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"Try running '~a ~a' for more information.")
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program-name
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help-command-1)
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command-help-1)
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'couldnt-find-file
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(format (string-append "Error: Couldn't find ~a" newline
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@ -46,7 +46,7 @@
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program-path
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program-path
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program-name
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init-command)
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command-init)
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'error-something-exists
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(format "Error: It looks like ~a already exists." program-path)
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@ -56,7 +56,7 @@
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"Try running '~a ~a'.")
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program-path
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program-name
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init-command)
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command-init)
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'error-item-not-found
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"Error: Item not found."
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@ -151,8 +151,8 @@
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(displayln item))))
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(define (ls)
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(if (and (file-exists? program-file)
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(has-read-permissions? program-file))
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(if (and (file-exists? program-path)
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(has-read-permissions? program-path))
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(let ([listof-items (file->lines program-path)])
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(if (null? listof-items)
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(displayln-messages-ref 'empty-list)
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@ -165,6 +165,7 @@
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(define (rm/remove-nicething item-number)
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(let ([listof-items (file->lines program-path)])
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(if (and (not (null? listof-items))
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(exact? item-number)
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(>= item-number 0)
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(< item-number (length listof-items)))
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(let* ([item-to-remove (list-ref listof-items item-number)]
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@ -174,8 +175,8 @@
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(displayln-messages-ref 'error-item-not-found))))
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(define (rm arg)
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(if (and (file-exists? program-file)
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(has-read-permissions? program-file))
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(if (and (file-exists? program-path)
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(has-read-permissions? program-path))
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(let ([item-number (string->number arg)])
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(if item-number
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(rm/remove-nicething item-number)
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@ -186,8 +187,8 @@
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;; add
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;; ------------------------------------------------
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(define (add nicething)
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(if (and (file-exists? program-file)
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(has-read-permissions? program-file))
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(if (and (file-exists? program-path)
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(has-read-permissions? program-path))
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;; The removing and adding of the '\n' is to
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;; ensure only one '\n' exists at the end of the
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;; item to be added.
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@ -212,8 +213,9 @@
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[list-length (length listof-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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[random-nicething (list-ref listof-nicethings random-number)]
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[nicething-trimmed (string-replace random-nicething "\n" "")])
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(displayln nicething-trimmed)))))
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;; ------------------------------------------------
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;; help
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@ -228,29 +230,29 @@
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"Commands:" newline
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" No command - Displays a random nicething from a random user." newline
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(format " ~a - Creates a file in ~a, which allows you to contribute to the town-wide list of nicethings."
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init-command
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command-init
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program-path) newline
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(format " ~a - Adds a nicething to your list." add-command) newline
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(format " ~a - Prints a numbered list of the nicethings you've added." ls-command) newline
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(format " ~a - Removes a nicething from your list." rm-command)
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(format " ~a - Adds a nicething to your list." command-add) newline
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(format " ~a - Prints a numbered list of the nicethings you've added." command-ls) newline
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(format " ~a - Removes a nicething from your list." command-rm)
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double-newline
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"Examples:" newline
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(format " ~a" program-name) newline
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(format " ~a ~a" program-name init-command) newline
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(format " ~a ~a \"You are wonderful\"" program-name add-command) newline
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(format " ~a ~a" program-name ls-command) newline
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(format " ~a ~a 2" program-name rm-command))))
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(format " ~a ~a" program-name command-init) newline
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(format " ~a ~a \"You are wonderful\"" program-name command-add) newline
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(format " ~a ~a" program-name command-ls) newline
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(format " ~a ~a 2" program-name command-rm))))
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(define (process-args vectorof-args)
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(match vectorof-args
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[(or (vector (== help-command-1))
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(vector (== help-command-2))
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(vector (== help-command-3))) (help)]
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[(vector (== ls-command)) (ls)]
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[(vector (== init-command)) (init)]
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[(vector (== add-command) a) (add a)]
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[(vector (== rm-command) a) (rm a)]
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[(or (vector (== command-help-1))
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(vector (== command-help-2))
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(vector (== command-help-3))) (help)]
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[(vector (== command-ls)) (ls)]
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[(vector (== command-init)) (init)]
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[(vector (== command-add) a) (add a)]
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[(vector (== command-rm) a) (rm a)]
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[_ (random-message)]
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[(vector _ ...) (displayln-messages-ref 'error-incorrect-usage)]))
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