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335 | ;; ported-from: src/games/host/driver.ts @ v1.3.0
;;
;; Live host driver base: turns a pure sim into a real room host. Owns what the
;; browsers keep in G — the roster (nick/badge/score), the auto-start policy
;; replacing the start button, the single pending timer that executes
;; SimEmit.next, and the split-brain concede/reassert rules. Every emitted frame
;; is broadcast AND applied locally through room.injectLocal(), the browsers'
;; hostEmit contract, so the hosting bot's own client view stays correct with no
;; parallel state.
;;
;; Divergence from the browsers, by design: no roster-grace map (peer-kit's
;; peerGone already sits behind the redial ladder, and bots don't suspend), and
;; no ensureHost() election backstop — a bot only ever claims an empty room it
;; was designated to host; failover is the matchmaker's re-mint.
;;
;; TS `abstract` has no CLJS equivalent: the per-game hooks below are ordinary
;; prototype methods that throw by default, and each subclass overrides them.
;; Subclass overriding through `defclass (extends …)` is real ES-class
;; inheritance, so a base method calling `(.roundLive this)` reaches the
;; subclass's version exactly as the TS did.
(ns ardegazu.peer.games.host.driver
(:require [shadow.cljs.modern :refer (defclass)]))
(def ^:private MAX-SEATS 16)
(declare maybe-start clear-pending clear-start-timer clear-timers driver-start
connected-seated broadcast-roster emit-frame on-lobby)
(defclass HostDriver
(constructor [this room opts]
(unchecked-set this "room" room)
(let [m (let [x (unchecked-get opts "match")]
(if ^boolean (js* "~{} == null" x) (js-obj) x))
min-players (js/Math.max 1 (let [x (unchecked-get m "minPlayers")]
(if ^boolean (js* "~{} == null" x) 2 x)))]
(unchecked-set
this "policy"
(js-obj "minPlayers" min-players
"expectedPlayers" (js/Math.max min-players
(let [x (unchecked-get m "expectedPlayers")]
(if ^boolean (js* "~{} == null" x) min-players x)))
"startTimeoutMs" (let [x (unchecked-get m "startTimeoutMs")]
(if ^boolean (js* "~{} == null" x) 15000 x))
"maxMatches" (let [x (unchecked-get m "maxMatches")]
(if ^boolean (js* "~{} == null" x) js/Infinity x)))))
(unchecked-set this "roster" (js/Map.))
(unchecked-set this "phase" "idle")
(unchecked-set this "matches" 0)
(unchecked-set this "_pending" nil)
(unchecked-set this "_startTimer" nil)
(unchecked-set this "_closed" false)
(unchecked-set this "_matchEndListeners" #js [])
(.on ^js room "frame"
(fn [from f]
(when (and (not (identical? from (unchecked-get room "myId")))
(unchecked-get room "hosting"))
(.onGameFrame ^js this from f))))
;; bind to a ^js local first: a ^js hint on an `unchecked-get` macro form is
;; LOST, and externs inference then misses the call (dev/docs/CLJS.md)
(let [^js room-peer (unchecked-get room "peer")]
(.on room-peer "peerGone"
(fn [id]
(when (unchecked-get room "hosting")
(when (.delete ^js (unchecked-get this "roster") id) (broadcast-roster this))
(.simPeerGone ^js this id)))))))
;; ---------------- shared machinery ----------------
(defn free-badge [self]
(let [used (js/Set.)]
(.forEach ^js (unchecked-get self "roster") (fn [p _k] (.add used (unchecked-get p "badge"))))
(loop [i 0]
(cond
(>= i MAX-SEATS) (dec MAX-SEATS)
(not (.has used i)) i
:else (recur (inc i))))))
(defn roster-entries
"The wire roster entries ([id, nick, badge, score])."
[self]
(let [out #js []]
(.forEach ^js (unchecked-get self "roster")
(fn [p id] (.push out #js [id (unchecked-get p "nick")
(unchecked-get p "badge") (unchecked-get p "score")])))
out))
(defn emit-frame
"Broadcast + local loopback, or targeted send (self-targets loop back)."
[self e]
(let [room (unchecked-get self "room")
my-id (unchecked-get room "myId")
to (unchecked-get e "to")
f (unchecked-get e "f")]
(cond
(and ^boolean (js* "!!(~{})" to) (not (identical? to my-id)))
(let [^js room-peer (unchecked-get room "peer")] (.send room-peer to f))
(identical? to my-id)
(.injectLocal ^js room f)
:else (let [^js room-peer (unchecked-get room "peer")]
(.broadcast room-peer f)
(.injectLocal ^js room f))))
js/undefined)
(defn broadcast-roster [self]
(.broadcastRoster ^js self))
(defn- broadcast-roster-default [self]
(let [f (js-obj "t" "ro"
"host" (unchecked-get (unchecked-get self "room") "myId")
"ps" (roster-entries self))]
(when (.roundLive ^js self) (unchecked-set f "live" 1))
(emit-frame self (js-obj "f" f)))
js/undefined)
(defn run-emit
"Apply a sim transition: frames out, receipts, and the next timer."
[self emit]
(.forEach ^js (unchecked-get emit "frames") (fn [e] (emit-frame self e)))
(let [match-end (unchecked-get emit "matchEnd")]
(when ^boolean (js* "!!(~{})" match-end)
(unchecked-set self "matches" (inc (unchecked-get self "matches")))
(let [lb (unchecked-get (unchecked-get self "room") "leaderboard")]
(when ^boolean (js* "!!(~{})" lb) (.hostMatchEnd ^js lb match-end)))
(.forEach ^js (unchecked-get self "_matchEndListeners") (fn [cb] (cb match-end)))))
(let [nxt (unchecked-get emit "next")]
;; SimEmit.next has THREE states and the order of these tests is
;; load-bearing: CLJS `nil?` compiles to `== null`, which is TRUE for
;; `undefined` too. Testing it first would treat an ABSENT `next` (a pick, a
;; snapshot — anything that emits frames without rescheduling) as an explicit
;; cancel and silently kill the pending step, stalling the whole match after
;; the first bell/tick. `identical?` is `===`, so `undefined` is matched
;; exactly and `null` falls through.
(cond
(identical? nxt js/undefined) nil ; absent ⇒ leave pending alone
(nil? nxt) (clear-pending self) ; explicit null ⇒ cancel
:else (let [step (unchecked-get nxt "step")
in-ms (unchecked-get nxt "inMs")]
(clear-pending self)
(unchecked-set
self "_pending"
(js/setTimeout
(fn []
(unchecked-set self "_pending" nil)
(when-not (or (unchecked-get self "_closed")
(not (unchecked-get (unchecked-get self "room") "hosting")))
(if (identical? step "lobby")
(do (.execStep ^js self step) (on-lobby self))
(.execStep ^js self step))))
in-ms)))))
js/undefined)
(defn on-hi
"The \"hi\" seat/cap/snapshot handling every game shares."
[self from m]
(let [raw (unchecked-get m "nick")
nick (if (string? raw) raw "")]
(when ^boolean (js* "!!(~{})" nick)
(let [roster (unchecked-get self "roster")
e (.get ^js roster from)]
(if (and (not ^boolean (js* "!!(~{})" e)) (>= (.-size ^js roster) MAX-SEATS))
(emit-frame self (js-obj "to" from "f" (js-obj "t" "fu")))
(do
(if-not ^boolean (js* "!!(~{})" e)
(let [wins (unchecked-get m "wins")
score (unchecked-get m "score")
s (cond
(identical? "number" (js* "typeof ~{}" wins)) wins
(identical? "number" (js* "typeof ~{}" score)) score
:else 0)]
(.set ^js roster from (js-obj "nick" nick "badge" (free-badge self)
"score" (bit-or s 0))))
(unchecked-set e "nick" nick))
(broadcast-roster self)
(when (.simRunning ^js self) (.sendSnap ^js self from))
(maybe-start self))))))
js/undefined)
(defn on-lobby
"Back in the lobby (a match ended or was voided) — maybe host another."
[self]
(unchecked-set self "phase" "lobby")
(maybe-start self)
js/undefined)
(defn connected-seated
"The connected, seated players (self always counts)."
[self]
(let [room (unchecked-get self "room")
my-id (unchecked-get room "myId")
^js net (unchecked-get (unchecked-get room "peer") "net")
open (js/Set. (.openPeers net))
out #js []]
(.forEach ^js (unchecked-get self "roster")
(fn [_p id] (when (or (identical? id my-id) (.has open id)) (.push out id))))
out))
(defn- driver-start [self ids]
(unchecked-set self "phase" "running")
(.startMatch ^js self ids)
js/undefined)
(defn- maybe-start [self]
(when (and (identical? (unchecked-get self "phase") "lobby")
(not (unchecked-get self "_closed"))
(< (unchecked-get self "matches")
(unchecked-get (unchecked-get self "policy") "maxMatches")))
(let [policy (unchecked-get self "policy")
seated (connected-seated self)]
(cond
(>= (.-length seated) (unchecked-get policy "expectedPlayers"))
(do (clear-start-timer self) (driver-start self seated))
(and (>= (.-length seated) (unchecked-get policy "minPlayers"))
(not ^boolean (js* "!!(~{})" (unchecked-get self "_startTimer"))))
(let [t (js/setTimeout
(fn []
(unchecked-set self "_startTimer" nil)
(when-not (or (not (identical? (unchecked-get self "phase") "lobby"))
(unchecked-get self "_closed")
(not (unchecked-get (unchecked-get self "room") "hosting")))
(let [now (connected-seated self)]
(when (>= (.-length now) (unchecked-get policy "minPlayers"))
(driver-start self now)))))
(unchecked-get policy "startTimeoutMs"))]
(unchecked-set self "_startTimer" t)
(when ^boolean (js* "!!(~{})" (unchecked-get t "unref")) (.unref ^js t)))
:else nil)))
js/undefined)
(defn- clear-pending [self]
(when ^boolean (js* "!!(~{})" (unchecked-get self "_pending"))
(js/clearTimeout (unchecked-get self "_pending")))
(unchecked-set self "_pending" nil)
js/undefined)
(defn- clear-start-timer [self]
(when ^boolean (js* "!!(~{})" (unchecked-get self "_startTimer"))
(js/clearTimeout (unchecked-get self "_startTimer")))
(unchecked-set self "_startTimer" nil)
js/undefined)
(defn- clear-timers [self]
(clear-pending self)
(clear-start-timer self))
;; ---------------- the public / HostDriverLike surface ----------------
(let [proto (.-prototype HostDriver)
thrower (fn [name] (fn [] (throw (js/Error. (str "HostDriver." name " is abstract")))))]
;; per-game hooks — every subclass overrides these (TS `abstract`)
(doseq [name ["concedeRule" "startMatch" "onGameFrame" "execStep" "simPeerGone"
"sendSnap" "roundLive" "simRunning" "abortSim"]]
(unchecked-set proto name (thrower name)))
;; shared machinery, overridable (valley-blocks replaces broadcastRoster)
(unchecked-set proto "broadcastRoster" (fn [] (this-as self (broadcast-roster-default self))))
(unchecked-set proto "rosterEntries" (fn [] (this-as self (roster-entries self))))
(unchecked-set proto "freeBadge" (fn [] (this-as self (free-badge self))))
(unchecked-set proto "emitFrame" (fn [e] (this-as self (emit-frame self e))))
(unchecked-set proto "runEmit" (fn [e] (this-as self (run-emit self e))))
(unchecked-set proto "onHi" (fn [from m] (this-as self (on-hi self from m))))
(unchecked-set proto "onLobby" (fn [] (this-as self (on-lobby self))))
(unchecked-set proto "connectedSeated" (fn [] (this-as self (connected-seated self))))
(unchecked-set proto "onMatchEnd"
(fn [cb] (this-as self
(.push ^js (unchecked-get self "_matchEndListeners") cb)
js/undefined)))
;; Manual start from the lobby (the auto-start policy normally does this).
(unchecked-set
proto "startNow"
(fn []
(this-as self
(if (or (not (identical? (unchecked-get self "phase") "lobby"))
(unchecked-get self "_closed")
(not (unchecked-get (unchecked-get self "room") "hosting")))
false
(let [seated (connected-seated self)]
(if (zero? (.-length seated))
false
(do (clear-start-timer self) (driver-start self seated) true)))))))
;; ---- HostDriverLike ----
(unchecked-set
proto "onClaimed"
(fn []
(this-as self
(when-not (unchecked-get self "_closed")
(let [room (unchecked-get self "room")
my-id (unchecked-get room "myId")
roster (unchecked-get self "roster")]
(when-not (.has ^js roster my-id)
(.set ^js roster my-id (js-obj "nick" (unchecked-get room "nick")
"badge" (free-badge self)
"score" 0)))
(unchecked-set self "phase" "lobby")
(broadcast-roster self)
(maybe-start self)))
js/undefined)))
(unchecked-set
proto "onSelfFrame"
(fn [frame]
(this-as self
(when (and (some? frame)
(not (identical? frame js/undefined))
(string? (unchecked-get frame "t")))
(.onGameFrame ^js self (unchecked-get (unchecked-get self "room") "myId") frame))
js/undefined)))
(unchecked-set
proto "onForeignClaim"
(fn [from m]
(this-as self
(if (.concedeRule ^js self from m)
(do (clear-timers self)
(.abortSim ^js self)
(unchecked-set self "phase" "idle")
(.clear ^js (unchecked-get self "roster"))
true) ; the room base adopts their roster; our hi follows from it
(do (broadcast-roster self) false))))) ; reassert
(unchecked-set
proto "close"
(fn []
(this-as self
(unchecked-set self "_closed" true)
(clear-timers self)
(.abortSim ^js self)
js/undefined))))
|