mudsync/room.scm

   1 ;;; Mudsync --- Live hackable MUD
   2 ;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
   3 ;;;
   4 ;;; This file is part of Mudsync.
   5 ;;;
   6 ;;; Mudsync is free software; you can redistribute it and/or modify it
   7 ;;; under the terms of the GNU General Public License as published by
   8 ;;; the Free Software Foundation; either version 3 of the License, or
   9 ;;; (at your option) any later version.
  10 ;;;
  11 ;;; Mudsync is distributed in the hope that it will be useful, but
  12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 ;;; General Public License for more details.
  15 ;;;
  16 ;;; You should have received a copy of the GNU General Public License
  17 ;;; along with Mudsync.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 (define-module (mudsync room)
  20   #:use-module (mudsync command)
  21   #:use-module (mudsync gameobj)
  22   #:use-module (mudsync utils)
  23   #:use-module (8sync actors)
  24   #:use-module (8sync agenda)
  25   #:use-module (oop goops)
  26   #:use-module (srfi srfi-1)
  27   #:use-module (ice-9 control)
  28   #:export (<room> <exit>))
  29
  30 \f
  31 ;;; Exits
  32 ;;; =====
  33
  34 (define-class <exit> ()
  35   (to #:init-keyword #:to)
  36   ;; Name of the room (@@: Should this be names?)
  37   (name #:getter exit-name
  38         #:init-keyword #:name)
  39   (desc #:init-keyword #:desc
  40         #:init-value #f)
  41
  42   ;; *Note*: These two methods have an extra layer of indirection, but
  43   ;;   it's for a good reason.
  44   (visible-check #:init-value (const #t)
  45                  #:init-keyword #:visible-check)
  46   ;; By default all exits can be traversed
  47   (traverse-check #:init-value (const #t)
  48                   #:init-keyword #:traverse-check))
  49
  50 ;; @@: Should we make whos-exiting optional?  Would there ever be any
  51 ;;   reason?
  52 (define* (exit-can-traverse? exit room whos-exiting)
  53   ((slot-ref exit 'traverse-check) exit room whos-exiting))
  54
  55 (define* (exit-is-visible? exit room whos-exiting)
  56   ((slot-ref exit 'visible-check) exit room whos-exiting))
  57
  58
  59 \f
  60 ;;; Rooms
  61 ;;; =====
  62
  63 (define (exit-shorthand name)
  64   (lambda (room message)
  65     (room-cmd-go room message #:direct-obj name)))
  66
  67 ;; TODO: Subclass from container?
  68 (define-class <room> (<gameobj>)
  69   ;; A list of <exit>
  70   (exits #:init-value '()
  71          #:init-keyword #:exits
  72          #:getter room-exits)
  73
  74   (container-dom-commands
  75    #:allocation #:each-subclass
  76    #:init-thunk
  77    (build-commands
  78     (("l" "look") ((empty-command cmd-look-room)))
  79     ("go" ((empty-command cmd-go-where)
  80            (loose-direct-command cmd-go)))
  81     (("say" "\"" "'") ((greedy-command cmd-say)))
  82     (("emote" "/me") ((greedy-command cmd-emote)))
  83     ;; movement aliases
  84     (("n" "north") ((empty-command go-north)))
  85     (("ne" "northeast") ((empty-command go-northeast)))
  86     (("e" "east") ((empty-command go-east)))
  87     (("se" "southeast") ((empty-command go-southeast)))
  88     (("s" "south") ((empty-command go-south)))
  89     (("sw" "southwest") ((empty-command go-southwest)))
  90     (("w" "west") ((empty-command go-west)))
  91     (("nw" "northwest") ((empty-command go-northwest)))
  92     (("u" "up") ((empty-command go-up)))
  93     (("d" "down") ((empty-command go-down)))))
  94
  95   (container-sub-commands
  96    #:allocation #:each-subclass
  97    #:init-thunk
  98    (build-commands
  99     (("l" "look") ((loose-direct-command cmd-look-at-from-room)))))
 100
 101   (actions #:allocation #:each-subclass
 102            #:init-thunk
 103            (build-actions
 104             (cmd-go room-cmd-go)
 105             (cmd-go-where room-cmd-go-where)
 106             (announce-entrance room-announce-entrance)
 107             (look-room room-look-room)
 108             (tell-room room-act-tell-room)
 109             ;; in this case the command is the same version as the normal
 110             ;; look-room version
 111             (cmd-look-room room-look-room)
 112             (cmd-look-at-from-room room-look-dont-see-it)
 113             (cmd-say room-cmd-say)
 114             (cmd-emote room-cmd-emote)
 115             ;; movement aliases
 116             (go-north (exit-shorthand "north"))
 117             (go-northeast (exit-shorthand "northeast"))
 118             (go-east (exit-shorthand "east"))
 119             (go-southeast (exit-shorthand "southeast"))
 120             (go-south (exit-shorthand "south"))
 121             (go-southwest (exit-shorthand "southwest"))
 122             (go-west (exit-shorthand "west"))
 123             (go-northwest (exit-shorthand "northwest"))
 124             (go-up (exit-shorthand "up"))
 125             (go-down (exit-shorthand "down")))))
 126
 127 (define common-exit-aliases
 128   '(("n" . "north")
 129     ("ne" . "northeast")
 130     ("e" . "east")
 131     ("se" . "southeast")
 132     ("s" . "south")
 133     ("sw" . "southwest")
 134     ("w" . "west")
 135     ("nw" . "northwest")
 136     ("u" . "up")
 137     ("d" . "down")))
 138
 139 (define (dealias-exit-name exit-name)
 140   (or (assoc-ref common-exit-aliases exit-name)
 141       exit-name))
 142
 143 (define* (room-cmd-go room message #:key direct-obj)
 144   (define exit
 145     (find
 146      (lambda (exit)
 147        (equal? (exit-name exit) (dealias-exit-name direct-obj)))
 148      (room-exits room)))
 149   (define to-address (if exit
 150                          ;; Get the exit, but resolve it dynamically
 151                          ;; in case it's a special
 152                          (dyn-ref room (slot-ref exit 'to))
 153                          #f))
 154   (define player (message-from message))
 155   (define player-name
 156     (mbody-val (<-wait player 'get-name)))
 157   (cond
 158    (exit
 159     (call-with-values (lambda ()
 160                         (exit-can-traverse? exit room player))
 161       (lambda* (can-traverse? #:optional player-flavortext
 162                               room-flavortext)
 163         (if can-traverse?
 164             ;; looks like we can go, so let's go!
 165             (begin
 166               ;; Set the player's new location
 167               (<-wait player 'set-loc!
 168                       #:loc to-address)
 169               (when player-flavortext
 170                 (<-wait player 'tell
 171                         #:text player-flavortext))
 172               ;; Tell everyone else the person walked away
 173               (room-tell-room
 174                room (or room-flavortext
 175                         (format #f "~a wanders ~a.\n"
 176                                 player-name direct-obj)))
 177               (<- to-address 'announce-entrance
 178                   #:who-entered player)
 179               ;; Have the new room update the player to the new location
 180               (<- to-address 'look-room
 181                   #:to-id player))
 182             ;; Otherwise, if we can't go...
 183             (begin
 184               (<- player 'tell
 185                   #:text (or player-flavortext
 186                              `("You try to go " ,direct-obj " but something "
 187                                "seems to block you.")))
 188               (when room-flavortext
 189                 (room-tell-room room room-flavortext
 190                                 #:exclude player)))))))
 191    (else
 192     (<- player 'tell
 193         #:text "You don't see any way to go there.\n"))))
 194
 195 (define (room-cmd-go-where room message)
 196   (<- (message-from message) 'tell
 197       #:text "Go where?\n"))
 198
 199 ;;; look commands
 200
 201 (define (room-player-looks-around room player-id)
 202   "Handle looking around the room"
 203   ;; Get the room text
 204   (define room-text
 205     `((strong "=> " ,(slot-ref room 'name) " <=")
 206       (p ,(gameobj-desc room))))
 207
 208   ;; Get a list of other things the player would see in the room
 209   (define occupant-names-all
 210     (map
 211      (lambda (occupant)
 212        (call-with-message (<-wait occupant 'visible-name
 213                                   #:whos-looking player-id)
 214                           (lambda* (_ #:key text)
 215                             text)))
 216      (remove
 217       (lambda (x) (equal? x player-id))
 218       (hash-map->list (lambda (x _) x)
 219                       (slot-ref room 'occupants)))))
 220
 221   ;; Strip out the #f responses (these aren't listed because they lack a name
 222   ;; or they aren't "obviously visible" to the player)
 223   (define occupant-names-filtered
 224     (filter identity occupant-names-all))
 225
 226   (define occupant-names-string
 227     (if (eq? occupant-names-filtered '())
 228         #f
 229         (format #f "You see here: ~a.\n"
 230                 (string-join occupant-names-filtered
 231                              ", "))))
 232
 233   (define final-text
 234     (if occupant-names-string
 235         `(,@room-text
 236           (p (em ,occupant-names-string)))
 237         room-text))
 238
 239   (<- player-id 'tell
 240       #:text final-text))
 241
 242
 243 (define* (room-look-room room message
 244                          ;; Either send it to the #:to-id of the message,
 245                          ;; or to the sender of the message
 246                          #:key (to-id (message-from message)))
 247   "Command: Player asks to look around the room"
 248   (room-player-looks-around room to-id))
 249
 250 (define (room-find-thing-called room called-this)
 251   "Find something called CALLED-THIS in the room, if any."
 252   (call/ec
 253    (lambda (return)
 254      (for-each
 255       (lambda (occupant)
 256         (define goes-by (mbody-val (<-wait occupant 'goes-by)))
 257         (if (ci-member called-this goes-by)
 258             (return occupant)))
 259       (hash-map->list (lambda (key val) key)
 260                       (slot-ref room 'occupants)))
 261      #f)))
 262
 263 (define* (room-look-dont-see-it room message #:key direct-obj)
 264   "In general, if we get to this point, we didn't find something to look at."
 265   (<- (message-from message) 'tell
 266       #:text "You don't see that here, so you can't look at it.\n"))
 267
 268
 269 (define* (room-tell-room room text #:key exclude wait)
 270   (define who-to-tell (gameobj-occupants room #:exclude exclude))
 271   (for-each
 272    (lambda (tell-me)
 273      ;; @@: Does anything really care?
 274      (define deliver-method
 275        (if wait
 276            <-wait
 277            <-))
 278      (deliver-method tell-me 'tell
 279                      #:text text))
 280    who-to-tell))
 281
 282 (define* (room-act-tell-room room message #:key text exclude wait)
 283   "Tell the room some messages."
 284   (room-tell-room room text
 285                   #:exclude exclude
 286                   #:wait wait))
 287
 288 (define* (room-cmd-say room message #:key phrase)
 289   "Command: Say something to room participants."
 290   (define player-name
 291     (mbody-val (<-wait (message-from message) 'get-name)))
 292   (define message-to-send
 293     `((b "<" ,player-name ">") " " ,phrase))
 294   (room-tell-room room message-to-send))
 295
 296 (define* (room-cmd-emote room message #:key phrase)
 297   "Command: Say something to room participants."
 298   (define player-name
 299     (mbody-val (<-wait (message-from message) 'get-name)))
 300   (define message-to-send
 301     `((b "* " ,player-name) " " ,phrase))
 302   (room-tell-room room message-to-send))
 303
 304 (define* (room-announce-entrance room message #:key who-entered)
 305   (define player-name
 306     (mbody-val (<-wait who-entered 'get-name)))
 307   (define message-to-send
 308     (format #f "~a enters the room.\n" player-name))
 309   (room-tell-room room message-to-send
 310                   #:exclude who-entered))