639 lines
19 KiB
Scheme
639 lines
19 KiB
Scheme
(import comparse)
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(import srfi-1)
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(import srfi-14)
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(import (chicken io))
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(import srfi-13)
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(import matchable)
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(import fmt)
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(import fmt-color)
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(import fmt-unicode)
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(import ansi-escape-sequences)
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(import (chicken file))
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(import breadline)
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(import ncurses)
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(import util)
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(import lisp)
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(define (lift fn parser)
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(bind parser (compose result fn)))
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(define (is-not x)
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(satisfies (lambda (y)
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(not (eqv? x y)))))
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(define parse-whitespace
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(one-or-more (is #\space)))
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(define skip-whitespace
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(skip (zero-or-more (is #\space))))
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(define +letter-char-set+
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(string->char-set "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVwXYZ"))
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(define +symbol-char-set+
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(char-set-union +letter-char-set+ (string->char-set "-0123456789")))
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(define parse-symbol
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(lift (compose string->symbol string-downcase list->string (applied append))
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(sequence (lift list (in +letter-char-set+)) (zero-or-more (in +symbol-char-set+)))))
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(define parse-number
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(lift (compose string->number list->string) (one-or-more (in char-set:digit))))
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(define parse-string
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(lift list->string (enclosed-by (is #\") (one-or-more (is-not #\")) (is #\"))))
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(define (followed-by-consuming parser separator)
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(sequence* ((value parser) (_ separator))
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(result value)))
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(define (separated-by separator parser)
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(one-or-more (any-of (followed-by-consuming parser separator) parser)))
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(define parse-symbol-or-number-or-string
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(any-of parse-number parse-symbol parse-string))
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(define (completely-parse parser)
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(followed-by parser end-of-input))
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(define parse-statement
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(all-of skip-whitespace (separated-by parse-whitespace parse-symbol-or-number-or-string)))
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(define (just fn)
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(lambda args
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(fn)))
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(define (perhaps fn arg)
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(if arg
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(fn arg)
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arg))
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(define display-newline
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(compose (just newline) display))
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(define (display-lines ln)
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(perhaps (curry map display-newline) ln))
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(define (parse-input)
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(parse (completely-parse parse-statement) (read-line)))
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(define parse-formatter
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(recursive-parser (one-or-more (any-of (followed-by-consuming (char-seq "<b>") (lift fmt-bold parser))
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(is-not #\<)))))
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(define (type-of elem)
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(cond ((pair? elem) 'pair)
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((symbol? elem) 'symbol)
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((number? elem) 'number)
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((char? elem) 'char)
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((string? elem) 'string)
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((boolean? elem) 'boolean)))
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(define (show str)
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(fmt #t (dsp (wrap-lines str))))
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(define (prompt str)
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(newline)
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(let ((result (readline str)))
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(if (equal? "" result)
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(prompt str)
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(begin
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(add-history! result)
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result))))
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(define (prompt-yn str)
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(newline)
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(let ((result (string-downcase (readline str))))
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(cond ((equal? "yes" result) #t)
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((equal? "no" result) #f)
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(else (begin
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(newline)
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(display "Please answer yes or no.")
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(prompt-yn str))))))
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(define (prompt-default str default)
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(map stuff-char (string->list default))
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(let loop ()
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(let ((result (readline str)))
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(if (equal? "" result)
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(loop)
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result))))
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(define +articles-prepositions+
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'(a an the into on to at as))
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(define (adventure-prompt)
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(let ((result (parse (completely-parse parse-statement) (prompt "> "))))
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(if result
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(let ((grug-result (filter (compose not (cut member <> +articles-prepositions+)) result)))
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(if (not (null? grug-result))
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grug-result
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(begin (display "I didn't quite understand that.")
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(adventure-prompt))))
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(begin (display "I didn't quite understand that.")
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(adventure-prompt)))))
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(define (compose-symbols . ln)
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(string->symbol
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(let loop ((ln ln))
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(case (length ln)
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((0) '())
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((1) (symbol->string (car ln)))
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(else (string-append (symbol->string (car ln)) "-" (loop (cdr ln))))))))
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(define *database* '())
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(define (database-set name key value)
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(set! *database* (let loop ((kv *database*))
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(if (null? kv)
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(list (cons name (list (cons key value))))
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(if (equal? name (caar kv))
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(cons (cons name (let loop ((kv (cdar kv)))
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(if (null? kv)
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(list (cons key value))
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(if (equal? key (caar kv))
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(cons (cons key value) (cdr kv))
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(cons (car kv) (loop (cdr kv))))))) (cdr kv))
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(cons (car kv) (loop (cdr kv))))))))
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(define (database-get name key default)
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(let loop ((kv *database*))
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(if (null? kv)
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default
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(if (equal? name (caar kv))
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(let loop ((kv (cdar kv)))
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(if (null? kv)
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default
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(if (equal? key (caar kv))
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(cdar kv)
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(loop (cdr kv)))))
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(loop (cdr kv))))))
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(define (database-save filename)
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(with-output-to-file filename (thunk (write *database*))))
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(define (database-load filename)
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(with-input-from-file filename (thunk (set! *database* (car (read-list))))))
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(define (database-remove name)
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(let loop ((kv *database*))
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(if (null? kv)
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'()
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(if (equal? name (caar kv))
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(cdr kv)
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(cons (car kv) (loop (cdr kv)))))))
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(define (get-all-objects)
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(map car *database*))
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(define (object-exists? object)
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(member object (get-all-objects)))
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(define (has-property? object property)
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(database-get object property #f))
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(define (toggle-flag object flag)
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(if (has-property? object flag)
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(database-set object flag #f)
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(database-set object flag #t)))
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(define (get-location object)
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(database-get object 'location #f))
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(define (set-name object name)
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(database-set object 'name name))
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(define (set-description object description)
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(database-set object 'description description))
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(define (get-name object)
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(database-get object 'name (symbol->string object)))
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(define (get-description object)
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(database-get object 'description "You see the swirling void of creation."))
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(define (get-container object)
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(database-get object 'container #f))
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(define (get-contents object)
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(database-get object 'contents '()))
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(define (set-destination object destination)
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(database-set object 'destination destination))
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(define (get-destination object)
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(database-get object 'destination #f))
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(define (set-enter-message object msg)
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(database-set object 'enter-message msg))
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(define (get-enter-message object)
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(database-get object 'enter-message #f))
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(define (get-aliases object)
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(database-get object 'aliases '()))
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(define (set-aliases object alias-list)
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(database-set object 'aliases alias-list))
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(define (add-alias object alias)
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(let ((aliases (get-aliases object)))
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(if (not (member alias aliases))
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(set-aliases object (cons alias aliases)))))
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(define (remove-alias object alias)
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(let ((aliases (get-aliases object)))
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(if (member alias aliases)
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(set-aliases object (remove (curry eq? alias) aliases)))))
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(define (set-hidden object value)
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(database-set object 'hidden value))
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(define (get-hidden object)
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(database-get object 'hidden #f))
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(define (set-fixed object value)
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(database-set object 'fixed value))
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(define (get-fixed object value)
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(database-get object 'hidden #f))
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(define (get-put-message object)
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(database-get object 'put-message "You put the ~a into the ~a."))
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;; Is development mode enabled?
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(define (devmode-enabled?)
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(has-property? 'you 'devmode))
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(define (toggle-devmode)
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(toggle-flag 'you 'devmode))
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;; Is an object fixed in place (e.g. cannot be picked up?)
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(define (fixed? object)
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(has-property? object 'fixed))
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(define (toggle-fixed object)
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(toggle-flag object 'fixed))
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;; Match a tag against a list of objects, checking for its tag and its aliases.
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(define (match-object tag objects)
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(let loop ((objects objects))
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(if (null? objects)
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#f
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(let ((taglist (cons (car objects) (get-aliases (car objects)))))
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(if (member tag taglist)
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(car objects)
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(loop (cdr objects)))))))
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(define (create-object tag name description)
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(set-name tag name)
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(set-description tag description))
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(define (move-object object container)
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(let ((prev-container (get-container object)))
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(database-set object 'container container)
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(let ((contents (get-contents container)))
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(if (not (member object contents))
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(begin
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(database-set container 'contents (cons object contents))
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(database-set prev-container 'contents (remove (curry eq? object) (get-contents prev-container))))))))
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;; Determine the objects visible to a source object, zork-style
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(define (visible-objects source)
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(let ((result (get-container source)))
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(if (and result (object-exists? result))
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(cons (get-container source) (get-contents (get-container source)))
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(error "Tried to determine visible objects for object without a container."))))
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(define (print-room-description room)
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(newline)
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(display (set-text '(bold) (get-name room)))
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(if (devmode-enabled?) (display (set-text '(bold fg-green) (string-append " [" (symbol->string room) "]"))))
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(newline)
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(display " ")
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(fmt #t (dsp (wrap-lines (get-description room))))
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(newline)
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(display "You see: ")
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(map (lambda (n) (if (not (get-hidden n)) (begin (display (get-name n)) (display " ") (if (devmode-enabled?) (begin (display (set-text '(bold fg-green) (string-append "[" (symbol->string n) "] ")))))))) (remove (curry eq? 'you) (get-contents room)))
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(newline))
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(define (do-command-enter tag)
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You cannot go that way.")
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(let ((destination (get-destination object)))
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(if (not destination)
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(show "You cannot enter that.")
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(begin
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(move-object 'you destination)
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(perhaps show (get-enter-message object))
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(print-room-description (get-container 'you))))))))
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(define (do-command-save)
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(let ((save-name (prompt-default "Enter save name: " "kekkonen.sav")))
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(if (or (not (file-exists? save-name)) (prompt-yn "That file already exists. Overwrite? "))
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(begin
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(show "Saving database, please wait...")
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(database-save save-name)
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(show "Done.")))))
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(define (do-command-load)
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(let ((save-name (prompt-default "Enter save file name to load: " "kekkonen.sav")))
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(if (not (file-exists? save-name))
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(show "That file does not exist.")
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(begin
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(show "Loading database, please wait...")
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(database-load save-name)
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(show "Done.")))))
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(define (do-command-look)
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(print-room-description (get-container 'you)))
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(define (do-command-examine tag)
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You cannot see that here.")
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(show (get-description object)))))
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(define (do-command-inventory)
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(map (compose show get-name) (get-contents 'you)))
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(define (do-command-take tag)
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(if (not (symbol? tag))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (if (devmode-enabled?)
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(get-all-objects)
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(visible-objects 'you)))))
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(if (or (not object) (and (fixed? object) (not (devmode-enabled?))))
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(if object
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(show "That is fixed in place.")
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(show "You cannot see that here."))
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(begin
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(show (string-append "You get " (get-name object) "."))
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(move-object object 'you))))))
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(define (do-command-drop tag)
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(if (not (symbol? tag))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (get-contents 'you))))
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(if (not object)
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(show "You are not carrying that.")
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(begin
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(show (string-append "You drop " (get-name object) "."))
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(move-object object (get-container 'you)))))))
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(define (do-command-put tag destination-tag)
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(let ((object (match-object tag (get-contents 'you))))
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(if (not object)
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(show "You are not carrying that.")
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(let ((destination-object (match-object destination-tag (visible-objects 'you))))
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(if (not destination-object)
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(show "You cannot see that here.")
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(move-object object (get-destination destination-object)))))))
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(define (do-command-devmode)
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(toggle-devmode)
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(if (devmode-enabled?)
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(show "Development mode enabled.")
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(show "Development mode disabled.")))
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(define (do-command-create tag name description)
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(if (not (and (symbol? tag) (string? name) (string? description)))
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(show "I didn't quite understand that.")
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(if (object-exists? tag)
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(show "That object already exists.")
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(begin
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(create-object tag name description)
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(move-object tag (get-container 'you))))))
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(define (do-setter-command tag value type? setter)
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(if (not (and (symbol? tag) (type? value)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(setter object value)
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(show "You set a value."))))))
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(define (do-command-rename tag name)
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(do-setter-command tag name string? set-name))
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(define (do-command-describe tag description)
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(do-setter-command tag description string? set-description))
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(define (do-command-flag tag flag)
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(if (not (and (symbol? tag) (symbol? flag)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(case flag
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((fixed) (set-fixed object #t))
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((hidden) (set-hidden object #t))
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(else (show "Invalid flag name."))))))))
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(define (do-command-unflag tag flag)
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(if (not (and (symbol? tag) (symbol? flag)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(case flag
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((fixed) (set-fixed object #f))
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((hidden) (set-hidden object #f))
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(else (show "Invalid flag name."))))))))
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(define (do-command-alias tag alias)
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(if (not (and (symbol? tag) (symbol? alias)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(add-alias object alias)
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(show "You add an alias."))))))
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(define (do-command-unalias tag alias)
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(if (not (and (symbol? tag) (symbol? alias)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(remove-alias object alias)
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(show "You remove an alias."))))))
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(define (do-command-destroy tag)
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(if (not (symbol? tag))
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(show "I didn't quite understand that.")
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(database-remove tag)))
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(define (do-command-aliases tag)
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(if (not (symbol? tag))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(begin
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(newline)
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(map (lambda (x) (display x) (display " ")) (get-aliases object))
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(newline))))))
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(define (do-command-message tag message-tag message)
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(if (not (and (symbol? tag) (symbol? message-tag) (string? message)))
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(show "I didn't quite understand that.")
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(let ((object (match-object tag (visible-objects 'you))))
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(if (not object)
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(show "You can't see that here.")
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(case message-tag
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((enter) (set-enter-message object message))
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(else (show "Invalid message name.")))))))
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(define (do-command-goto tag)
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(if (not (symbol? tag))
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(show "I didn't quite understand that.")
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(begin
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(move-object 'you tag)
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(print-room-description (get-container 'you)))))
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(define +cardinal-sets+
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'((north n)
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(northeast ne north-east)
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(east e)
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(southeast se south-east)
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(south s)
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(southwest sw south-west)
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(west w)
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(northwest nw north-west)
|
|
(up u)
|
|
(down d)))
|
|
|
|
(define +cardinal-opposites+
|
|
'((north . south)
|
|
(northeast . southwest)
|
|
(east . west)
|
|
(southeast . northwest)
|
|
(south . north)
|
|
(southwest . northeast)
|
|
(west . east)
|
|
(northwest . southeast)
|
|
(up . down)
|
|
(down . up)))
|
|
|
|
(define (get-cardinal-set direction)
|
|
(find (curry member direction) +cardinal-sets+))
|
|
|
|
(define (get-cardinal-aliases direction)
|
|
(perhaps (curry remove (curry eq? direction)) (get-cardinal-set direction)))
|
|
|
|
(define (cardinal-direction? direction)
|
|
(list? (member direction (flatten +cardinal-sets+))))
|
|
|
|
(define (get-inverse-direction direction)
|
|
(perhaps cdr (assoc direction +cardinal-opposites+)))
|
|
|
|
(define (get-canonical-cardinal-direction-name direction)
|
|
(perhaps car (get-cardinal-set direction)))
|
|
|
|
(define (do-command-dig direction destination)
|
|
(if (not (and (symbol? direction) (symbol? destination)))
|
|
(show "I didn't quite understand that.")
|
|
(if (not (cardinal-direction? direction))
|
|
(show "You must specify a compass rose direction or up and down.")
|
|
(let ((canonical-direction (get-canonical-cardinal-direction-name direction)))
|
|
(let ((exit-tag (compose-symbols canonical-direction (get-container 'you) destination)))
|
|
(if (object-exists? exit-tag)
|
|
(show "An exit like that already exists.")
|
|
(begin
|
|
(move-object exit-tag (get-container 'you))
|
|
(set-hidden exit-tag #t)
|
|
(set-destination exit-tag destination)
|
|
(map (curry add-alias exit-tag) (get-cardinal-set direction))
|
|
(show "You create a passage."))))))))
|
|
|
|
(define (do-command-exit)
|
|
(show "Goodbye, see you later...")
|
|
(set! *exit-adventure* #t))
|
|
|
|
(define (alias-transform input)
|
|
(match input
|
|
(('quit) '(exit))
|
|
(('i) '(inventory))
|
|
(('inv) '(inventory))
|
|
(('look x) `(examine ,x))
|
|
(('go x) `(enter ,x))
|
|
(('get x) `(take ,x))
|
|
((x) (if (cardinal-direction? x)
|
|
`(enter ,x)
|
|
input))
|
|
(_ input)))
|
|
|
|
(define (dispatch-command input)
|
|
(let ((success #t))
|
|
(match input
|
|
(('look) (do-command-look))
|
|
(('save) (do-command-save))
|
|
(('load) (do-command-load))
|
|
(('devmode) (do-command-devmode))
|
|
(('exit) (do-command-exit))
|
|
(('enter x) (do-command-enter x))
|
|
(('take x) (do-command-take x))
|
|
(('drop x) (do-command-drop x))
|
|
(('inventory) (do-command-inventory))
|
|
(('examine x) (do-command-examine x))
|
|
(('put x y) (do-command-put x y))
|
|
(_ (if (devmode-enabled?)
|
|
(match input
|
|
(('create x y z) (do-command-create x y z))
|
|
(('rename x y) (do-command-rename x y))
|
|
(('describe x y) (do-command-describe x y))
|
|
(('dig x y) (do-command-dig x y))
|
|
(('flag x y) (do-command-flag x y))
|
|
(('unflag x y) (do-command-unflag x y))
|
|
(('alias x y) (do-command-alias x y))
|
|
(('unalias x y) (do-command-unalias x y))
|
|
(('destroy x) (do-command-destroy x))
|
|
(('aliases x) (do-command-aliases x))
|
|
(('message x y z) (do-command-message x y z))
|
|
(('goto x) (do-command-goto x))
|
|
(_ (set! success #f)))
|
|
(set! success #f))))
|
|
success))
|
|
|
|
(create-object 'garden "A Well-Kept Garden" "A french-style garden with topiary in the shape of various animals. A fountain gurgles happily in the middle. A trail leads off into a forest to the north.")
|
|
(create-object 'unicorn "a frolicking unicorn" "A white unicorn, with a long spiral horn.")
|
|
(create-object 'forest "A Foreboding Forest" "Tall trees bunch around a winding path.")
|
|
(create-object 'trail "a trail" "A winding trail.")
|
|
(add-alias 'trail 'winding)
|
|
(add-alias 'trail 'north)
|
|
(add-alias 'trail 'n)
|
|
(set-hidden 'trail #t)
|
|
(set-enter-message 'trail "You walk along the winding trail...")
|
|
(move-object 'you 'garden)
|
|
(move-object 'trail 'garden)
|
|
(toggle-fixed 'trail)
|
|
(set-destination 'trail 'forest)
|
|
(move-object 'unicorn 'garden)
|
|
|
|
(define *exit-adventure* #f)
|
|
|
|
(define (adventure)
|
|
(let ((success (dispatch-command (alias-transform (adventure-prompt)))))
|
|
(if (not success)
|
|
(begin
|
|
(show "I didn't quite understand that.")
|
|
(adventure))
|
|
(if *exit-adventure*
|
|
(display *database*)
|
|
(adventure)))))
|
|
|
|
(print-room-description (get-container 'you))
|
|
(adventure)
|