47 lines
1.7 KiB
Racket
47 lines
1.7 KiB
Racket
#lang racket/base
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(require (prefix-in config: "config.rkt")
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(prefix-in init: "init.rkt")
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(prefix-in messages: "messages.rkt")
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(prefix-in utils: "utils.rkt"))
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(provide (all-defined-out))
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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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[(equal? args-length 0)
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(utils:display-hash-ref messages:messages 'show-usage)]
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;; help
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[(and (equal? args-length 1)
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(member (vector-ref args 0) config:help-command))
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(utils:display-hash-ref messages:messages 'show-help)]
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;; init
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[(and (equal? args-length 1)
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(member (vector-ref args 0) config:initialize-command))
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(init:initialize)]
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;; add
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[(and (or (equal? args-length 2) (>= args-length 2))
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(member (vector-ref args 0) config:add-command))
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(utils:add-item-to-list config:path-to-list-file args)]
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;; ls
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[(and (equal? args-length 1)
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(member (vector-ref args 0) config:list-command))
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(utils:show-list-from-file config:path-to-list-file)]
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;; rm
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[(and (equal? args-length 2)
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(member (vector-ref args 0) config:remove-command)
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(real? (string->number (vector-ref args 1)))
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(or (positive? (string->number (vector-ref args 1)))
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(zero? (string->number (vector-ref args 1))))
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;; Length subtract one because the numbering starts at zero
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(not (> (string->number (vector-ref args 1)) (sub1 (length (utils:file->string-list config:path-to-list-file))))))
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(utils:remove-item-from-list config:path-to-list-file args)]
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[else (utils:display-hash-ref messages:messages 'show-usage)])))
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