X-Git-Url: https://jxself.org/git/?p=mudsync.git;a=blobdiff_plain;f=mudsync%2Fcommand.scm;fp=mudsync%2Fcommand.scm;h=28092fcf43cf0f7b1939ba0910a411c6c3ae1ba5;hp=0000000000000000000000000000000000000000;hb=136ce3b725c83af0b7e8be632e943de6b07b65c5;hpb=c3e788ae7726f7e52a62ffeb30254bfa0f0da7cb

diff --git a/mudsync/command.scm b/mudsync/command.scm
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+(define-module (mudsync command)
+  #:use-module (mudsync parser)
+  #:use-module (mudsync gameobj)
+  #:use-module (8sync systems actors)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-9)
+  #:use-module (ice-9 control)
+  #:use-module (ice-9 match)
+
+  #:export (direct-command
+            indir-command
+            empty-command
+            direct-greedy-command
+            greedy-command
+            player-gather-command-handlers
+            find-command-winner))
+
+;;; Commands
+;;; ========
+
+(define %low-priority 0)
+(define %default-priority 1)
+(define %high-priority 2)
+
+(define-record-type <command>
+  (make-command verbs matcher should-handle action priority)
+  command?
+  (verbs command-verbs)
+  (matcher command-matcher)
+  (should-handle command-should-handle)
+  (action command-action)
+  (priority command-priority))
+
+
+(define (direct-command verbs action)
+  (make-command verbs
+                cmatch-direct-obj
+                ;; @@: Should we allow fancier matching than this?
+                ;;   Let the actor itself pass along this whole method?
+                (lambda* (goes-by #:key direct-obj)
+                  (member direct-obj goes-by))
+                action
+                %default-priority))
+
+(define* (indir-command verbs action #:optional prepositions)
+  (make-command verbs
+                cmatch-indir-obj
+                ;; @@: Should we allow fancier matching than this?
+                ;;   Let the actor itself pass along this whole method?
+                (lambda* (goes-by #:key direct-obj indir-obj preposition)
+                  (if prepositions
+                      (and
+                       (member indir-obj goes-by)
+                       (member preposition prepositions))
+                      (member indir-obj goes-by)))
+                action
+                %high-priority))
+
+(define (empty-command verbs action)
+  (make-command verbs
+                cmatch-empty
+                (const #t)
+                action
+                %low-priority))
+
+(define (greedy-command verbs action)
+  (make-command verbs
+                cmatch-greedy
+                (const #t)
+                action
+                %low-priority))
+
+(define (direct-greedy-command verbs action)
+  "greedy commands but which match the direct object"
+  (make-command verbs
+                cmatch-direct-obj-greedy
+                (lambda* (goes-by #:key direct-obj rest)
+                  (member direct-obj goes-by))
+                action
+                %low-priority))
+
+;; @@: We should probably ONLY allow these to go to users!
+(define* (custom-command verbs matcher should-handle action
+                         #:optional (priority %default-priority))
+  "Full-grained customizable command."
+  (make-command verbs matcher should-handle action priority))
+
+
+;;; Command handling
+;;; ================
+
+;; @@: Hard to know whether this should be in player.scm or here...
+;; @@: This could be more efficient as a stream...!?
+(define (player-gather-command-handlers player verb)
+
+  (define player-loc
+    (let ((result (gameobj-loc player)))
+      (if result
+          result
+          (throw 'player-has-no-location
+                 "Player ~a has no location!  How'd that happen?\n"
+                 #:player-id (actor-id player)))))
+
+  ;; Ask the room for its commands
+  (define room-commands
+    ;; TODO: Map room id and sort
+    (message-ref
+     (<-wait player player-loc
+             'get-container-commands
+             #:verb verb)
+     'commands))
+
+  ;; All the co-occupants of the room (not including ourself)
+  (define co-occupants
+    (remove
+     (lambda (x) (equal? x (actor-id player)))
+     (message-ref
+      (<-wait player player-loc 'get-occupants)
+      'occupants)))
+
+  ;; @@: There's a race condition here if someone leaves the room
+  ;;   during this, heh...
+  ;;   I'm not sure it can be solved, but "lag" on the race can be
+  ;;   reduced maybe?
+
+  ;; Get all the co-occupants' commands
+  (define co-occupant-commands
+    ;; TODO: Switch this to a fold.  Ignore a result if it
+    ;;   returns false for in the command response
+    (map
+     (lambda (co-occupant)
+       (let ((result (<-wait player co-occupant 'get-commands
+                             #:verb verb)))
+         (list
+          (message-ref result 'commands)
+          (message-ref result 'goes-by)
+          co-occupant)))
+     co-occupants))
+
+  ;; Append our own command handlers
+  (define our-commands
+    ((@@ (mudsync player) player-self-commands) player))
+
+  ;; TODO: Append our inventory's relevant command handlers
+
+  ;; Now return a big ol sorted list of ((actor-id . command))
+  (append
+   (sort-commands-append-actor room-commands
+                               player-loc '()) ; room doesn't go by anything
+   (sort-commands-multi-actors co-occupant-commands)
+   (sort-commands-append-actor our-commands
+                               (actor-id player) '()))) ; nor does player
+
+(define (sort-commands-append-actor commands actor-id goes-by)
+  (sort-commands-multi-actors
+   (map (lambda (command) (list command actor-id)) commands)))
+
+(define (sort-commands-multi-actors actors-and-commands)
+  (sort
+   actors-and-commands
+   (lambda (x y)
+     (> (command-priority (cdr x))
+        (command-priority (cdr y))))))
+
+
+(define-record-type <command-winner>
+  (make-command-winner action actor-id)
+  command-winner?
+  (action command-winner-action)
+  (actor-id command-winner-action-id))
+
+
+(define (find-command-winner sorted-candidates line)
+  "Find a command winner from a sorted list of candidates"
+  ;; A cache of results from matchers we've already seen
+  (define matcher-cache '())
+  (find
+   (match-lambda
+     ((command actor-id actor-goes-by)
+      
+      (let* ((matcher (command-matcher command))
+             (matched (matcher line)))
+        (if (and matched
+                 ;; Great, it matched, but does it also pass
+                 ;; should-handle?
+                 (apply (command-should-handle command)
+                        actor-goes-by
+                        matched))  ; matched is kwargs if truthy
+            actor-id
+            #f))))
+   sorted-candidates))