+;; Kind of a useful utility, maybe?
+(define (simple-slot-getter slot)
+ (lambda (actor message)
+ (<-reply message (slot-ref actor slot))))
+
+(define (gameobj-replace-step-occupants actor occupants)
+ ;; Snarf all the occupants!
+ (display "replacing occupant\n")
+ (when occupants
+ (for-each
+ (lambda (occupant)
+ (<-wait occupant 'set-loc!
+ #:loc (actor-id actor)))
+ occupants)))
+
+(define gameobj-replace-steps*
+ (list gameobj-replace-step-occupants))
+
+(define (run-replacement actor replaces replace-steps)
+ (when replaces
+ (mbody-receive (_ #:key occupants)
+ (<-wait replaces 'assist-replace)
+ (for-each
+ (lambda (replace-step)
+ (replace-step actor occupants))
+ replace-steps))))
+
+;; @@: This could be kind of a messy way of doing gameobj-act-init
+;; stuff. If only we had generic methods :(
+(define* (gameobj-act-init actor message #:key replace)
+ "Your most basic game object init procedure.
+Assists in its replacement of occupants if necessary and nothing else."
+ (run-replacement actor replace gameobj-replace-steps*))
+
+(define (gameobj-goes-by gameobj)
+ "Find the name we go by. Defaults to #:name if nothing else provided."
+ (cond ((slot-ref gameobj 'goes-by) =>
+ identity)
+ ((slot-ref gameobj 'name) =>
+ (lambda (name)
+ (list name)))
+ (else '())))
+
+(define (gameobj-act-goes-by actor message)
+ "Reply to a message requesting what we go by."
+ (<-reply message #:goes-by (gameobj-goes-by actor)))
+
+(define (val-or-run val-or-proc)
+ "Evaluate if a procedure, or just return otherwise"
+ (if (procedure? val-or-proc)
+ (val-or-proc)
+ val-or-proc))
+
+(define (filter-commands commands verb)
+ (filter
+ (lambda (cmd)
+ (equal? (command-verbs cmd)
+ verb))
+ commands))
+
+(define* (gameobj-get-commands actor message #:key verb)
+ "Get commands a co-occupant of the room might execute for VERB"
+ (define filtered-commands
+ (filter-commands (val-or-run (slot-ref actor 'commands))
+ verb))
+ (<-reply message
+ #:commands filtered-commands
+ #:goes-by (gameobj-goes-by actor)))
+
+(define* (gameobj-get-container-commands actor message #:key verb)
+ "Get commands as the container / room of message's sender"
+ (define filtered-commands
+ (filter-commands (val-or-run (slot-ref actor 'container-commands))
+ verb))
+ (<-reply message #:commands filtered-commands))
+
+(define* (gameobj-get-contained-commands actor message #:key verb)
+ "Get commands as being contained (eg inventory) of commanding gameobj"
+ (define filtered-commands
+ (filter-commands (val-or-run (slot-ref actor 'contained-commands))
+ verb))
+ (<-reply message
+ #:commands filtered-commands
+ #:goes-by (gameobj-goes-by actor)))
+
+(define* (gameobj-add-occupant! actor message #:key who)
+ "Add an actor to our list of present occupants"
+ (hash-set! (slot-ref actor 'occupants)
+ who #t))
+
+(define* (gameobj-remove-occupant! actor message #:key who)
+ "Remove an occupant from the room."
+ (hash-remove! (slot-ref actor 'occupants) who))
+
+(define* (gameobj-occupants gameobj #:key exclude)
+ (hash-fold
+ (lambda (occupant _ prev)
+ (define exclude-it?
+ (match exclude
+ ;; Empty list and #f are non-exclusion
+ (() #f)
+ (#f #f)
+ ;; A list of addresses... since our address object is (annoyingly)
+ ;; currently a simple cons cell...
+ ((exclude-1 ... exclude-rest)
+ (pk 'failboat (member occupant (pk 'exclude-lst exclude))))
+ ;; Must be an individual address!
+ (_ (equal? occupant exclude))))
+ (if exclude-it?
+ prev
+ (cons occupant prev)))
+ '()
+ (slot-ref gameobj 'occupants)))
+
+(define* (gameobj-get-occupants actor message #:key exclude)
+ "Get all present occupants of the room."
+ (define occupants
+ (gameobj-occupants actor #:exclude exclude))
+
+ (<-reply message #:occupants occupants))
+
+(define (gameobj-act-get-loc actor message)
+ (<-reply message (slot-ref actor 'loc)))
+
+(define (gameobj-set-loc! gameobj loc)
+ "Set the location of this object."
+ (define old-loc (gameobj-loc gameobj))
+ (format #t "DEBUG: Location set to ~s for ~s\n"
+ loc (actor-id-actor gameobj))
+
+ (when (not (equal? old-loc loc))
+ (slot-set! gameobj 'loc loc)
+ ;; Change registation of where we currently are
+ (if old-loc
+ (<-wait old-loc 'remove-occupant! #:who (actor-id gameobj)))
+ (if loc
+ (<-wait loc 'add-occupant! #:who (actor-id gameobj)))))
+
+;; @@: Should it really be #:id ? Maybe #:loc-id or #:loc?
+(define* (gameobj-act-set-loc! actor message #:key loc)
+ "Action routine to set the location."
+ (gameobj-set-loc! actor loc))
+
+(define (slot-ref-maybe-runcheck gameobj slot whos-asking)
+ "Do a slot-ref on gameobj, evaluating it including ourselves
+and whos-asking, and see if we should just return it or run it."
+ (match (slot-ref gameobj slot)
+ ((? procedure? slot-val-proc)
+ (slot-val-proc gameobj whos-asking))
+ (anything-else anything-else)))
+
+(define gameobj-get-name (simple-slot-getter 'name))
+
+(define* (gameobj-act-set-name! actor message val)
+ (slot-set! actor 'name val))
+
+(define* (gameobj-get-desc actor message #:key whos-looking)
+ (define desc-text
+ (match (slot-ref actor 'desc)
+ ((? procedure? desc-proc)
+ (desc-proc actor whos-looking))
+ (desc desc)))
+ (<-reply message desc-text))
+
+(define (gameobj-visible-to-player? gameobj whos-looking)
+ "Check to see whether we're visible to the player or not.
+By default, this is whether or not the generally-visible flag is set."
+ (slot-ref gameobj 'generally-visible))
+
+(define* (gameobj-visible-name actor message #:key whos-looking)
+ ;; Are we visible?
+ (define we-are-visible
+ ((slot-ref actor 'visible-to-player?) actor whos-looking))
+
+ (define name-to-return
+ (if we-are-visible
+ ;; Return our name
+ (match (slot-ref actor 'name)
+ ((? procedure? name-proc)
+ (name-proc actor whos-looking))
+ ((? string? name)
+ name)
+ (#f #f))
+ #f))
+ (<-reply message #:text name-to-return))