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core.cljs
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core.cljs
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(ns re-frisk-remote.core
(:require [taoensso.sente :as sente]
[reagent.core :as reagent]
[re-frame.subs :refer [query->reaction]]
[re-frame.trace :as trace :include-macros true]
[re-frame.core :refer [subscribe] :as re-frame]
[re-frisk.diff :as diff]
[re-frisk.delta :as delta]
[taoensso.sente.packers.transit :as sente-transit]
[cognitect.transit :as transit]
[taoensso.timbre :as timbre])
(:require-macros [reagent.ratom :refer [reaction]]))
;; either nil (do not send), or a map with the following optional keys:
;; :prev-app-db -- app DB last time :refrisk/app-db was sent
;; :prev-event-app-db -- app DB last time :refrisk/events was sent
;; :event-time -- timestamp of last :refrisk/pre-events
;; :prev-id-handlers -- id handlers last time :refrisk/id-handler was sent
(defonce send-state (atom nil))
(defonce ch-chsk (atom {}))
(defonce re-frisk-enabled? true)
(defonce re-frame-10x-enabled? false)
(defonce chsk-send!* (atom {}))
(defonce on-init* (atom nil))
(defonce pre-send* (atom nil))
(defonce id-handler-timer* (atom nil))
(defn- send [message]
(when message
(@chsk-send!* message)))
(defn pre-event-callback [value]
(when (and @send-state re-frisk-enabled?)
(swap! send-state assoc :event-time (js/Date.now))
(send [:refrisk/pre-events value])))
(defn post-event-callback [value]
(when @send-state
(let [app-db @(subscribe [::db])
prev-event-app-db (:prev-event-app-db @send-state)
event-data (if (:event-time @send-state)
{:time (- (js/Date.now) (:event-time @send-state))}
{:event value})
app-db-diff (diff/diff prev-event-app-db app-db)
payload (conj {:app-db-diff app-db-diff}
event-data)]
(swap! send-state assoc :prev-event-app-db app-db :event-time nil)
(send [:refrisk/events payload]))))
(defn register-trace-cb []
(trace/register-trace-cb ::cb (fn [traces] (@chsk-send!* [:trace/log traces]))))
(defn id-handlers []
(into {} (map #(hash-map (first %) @(second %))
(remove #(or (= (first (ffirst %)) ::db)
(nil? (second %)))
@query->reaction))))
(defn id-handlers-msg []
(let [ih-prev (:prev-id-handlers @send-state)
ih (id-handlers)]
(swap! send-state assoc :prev-id-handlers ih)
(if ih-prev
(when-let [d (delta/delta ih-prev ih)]
[:refrisk/id-handler-delta d])
[:refrisk/id-handler ih])))
(defn re-frame-sub [& rest]
(when @send-state
(send (id-handlers-msg)))
(js/clearInterval @id-handler-timer*)
(reset! id-handler-timer* nil))
(defn- get-db []
(let [db @(subscribe [::db])]
(if @pre-send* (@pre-send* db) db)))
(defn- app-db-msg [db]
(let [db-prev (:prev-app-db @send-state)]
(swap! send-state assoc :prev-app-db db)
(if db-prev
(when-let [d (delta/delta db-prev db)]
[:refrisk/app-db-delta d])
[:refrisk/app-db db])))
(defn send-app-db []
(let [db (get-db)]
(when @send-state
(send (app-db-msg db)))
(when (nil? @id-handler-timer*)
(reset! id-handler-timer* (js/setInterval re-frame-sub 1000)))))
(defn start-socket [host]
(let [{:keys [send-fn ch-recv]}
(sente/make-channel-socket-client!
"/chsk"
nil
{:type :auto
:host host
:protocol :http
:params {:kind :re-frisk-remote}
:packer (sente-transit/get-transit-packer
:json
{:handlerForForeign (fn [x h] (transit/write-handler (fn [o] "ForeignType")
(fn [o] "")))}
{})})]
(reset! ch-chsk ch-recv)
(reset! chsk-send!* send-fn)))
(defmulti event-msg-handler "Sente `event-msg`s handler" :id)
(defmethod event-msg-handler :chsk/state
[{[{was-open? :open?} {now-open? :open?}] :?data :as msg}]
(if (not= was-open? now-open?)
(reset! send-state nil)))
(defmethod event-msg-handler :chsk/recv [{:as ev-msg :keys [?data]}]
(case (first ?data)
:refrisk/enable
(do
(reset! send-state {})
(reagent/track! send-app-db))
:refrisk/disable
(reset! send-state nil)))
(defmethod event-msg-handler :default [msg]
nil)
(defonce router_ (atom nil))
(defn stop-router! []
(when-let [stop-f @router_] (stop-f)))
(defn start-router! []
(stop-router!)
(reset! router_
(sente/start-client-chsk-router!
@ch-chsk event-msg-handler)))
(defn init []
(start-router!)
(when re-frisk-enabled?
(if re-frame.core/reg-sub
(re-frame.core/reg-sub ::db (fn [db _] db))
(re-frame.core/register-sub ::db (fn [db _] (reaction @db))))
(re-frame/add-post-event-callback post-event-callback))
(when re-frame-10x-enabled?
(register-trace-cb))
(when @on-init* (@on-init*)))
(defn enable-re-frisk-remote! [& [{:keys [host pre-send on-init enable-re-frisk? enable-re-frame-10x?]
:or {enable-re-frisk? true enable-re-frame-10x? false}}]]
(timbre/merge-config! {:ns-blacklist ["taoensso.sente" "taoensso.sente.*"]})
(reset! pre-send* pre-send)
(reset! on-init* on-init)
(set! re-frisk-enabled? enable-re-frisk?)
(set! re-frame-10x-enabled? enable-re-frame-10x?)
(start-socket (or host "localhost:4567"))
(init))