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Separate event handling into handler methods

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Nicholas Kariniemi 2014-10-10 19:03:33 +03:00
parent 52ce9ffb42
commit bef0e8d4e7
1 changed files with 42 additions and 40 deletions
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48
src/cljx/grub/state.cljx
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@ -7,13 +7,9 @@
#+cljs (:require-macros [grub.macros :refer [log logs]] #+cljs (:require-macros [grub.macros :refer [log logs]]
[cljs.core.async.macros :refer [go]])) [cljs.core.async.macros :refer [go]]))
(defn make-agent (defmulti handle-message (fn [msg out states shadow client?] (:type msg)))
([client? in out states] (make-agent client? in out states sync/empty-state))
([client? in out states initial-shadow] (defmethod handle-message :diff [msg out states shadow client?]
(go (loop [shadow initial-shadow]
(when-let [msg (<! in)]
(condp = (:type msg)
:diff
(let [states* @states (let [states* @states
shadow (sync/get-history-state states* (:hash msg))] shadow (sync/get-history-state states* (:hash msg))]
(if shadow (if shadow
@ -25,33 +21,39 @@
(when-not (= states* new-states) (when-not (= states* new-states)
(reset! states new-states))) (reset! states new-states)))
(when-not (or client? (sync/empty-diff? (:diff msg))) (when-not (or client? (sync/empty-diff? (:diff msg)))
(>! out (message/diff-msg diff hash))) (a/put! out (message/diff-msg diff hash)))
(if client? (if client?
(recur new-shadow) new-shadow
(recur (sync/get-current-state new-states)))) (sync/get-current-state new-states)))
(if client? (if client?
(do (>! out message/full-sync-request) (do (a/put! out message/full-sync-request)
(recur shadow)) shadow)
(let [state (sync/get-current-state states*)] (let [state (sync/get-current-state states*)]
(>! out (message/full-sync state)) (a/put! out (message/full-sync state))
(recur state))))) state)))))
:full-sync-request (defmethod handle-message :full-sync-request [msg out states shadow client?]
(let [state (sync/get-current-state @states)] (let [state (sync/get-current-state @states)]
(>! out (message/full-sync state)) (a/put! out (message/full-sync state))
(recur state)) state))
:full-sync (defmethod handle-message :full-sync [msg out states shadow client?]
(let [state (:state msg)] (let [state (:state msg)]
(reset! states (sync/new-state state)) (reset! states (sync/new-state state))
(recur state)) state))
:new-state (defmethod handle-message :new-state [msg out states shadow client?]
(let [{:keys [diff hash]} (sync/diff-states (:state msg) shadow)] (let [{:keys [diff hash]} (sync/diff-states (:state msg) shadow)]
(when-not (sync/empty-diff? diff) (when-not (sync/empty-diff? diff)
(>! out (message/diff-msg diff hash))) (a/put! out (message/diff-msg diff hash)))
(recur shadow)) shadow))
(recur shadow)))))))
(defn make-agent
([client? in out states] (make-agent client? in out states sync/empty-state))
([client? in out states initial-shadow]
(go (loop [shadow initial-shadow]
(when-let [msg (<! in)]
(recur (handle-message msg out states shadow client?)))))))
(defn make-server-agent (defn make-server-agent
([in out states] (make-agent false in out states)) ([in out states] (make-agent false in out states))