From d7708e1382ac4c099ac3831215a2787595e1c9e7 Mon Sep 17 00:00:00 2001
From: Nicholas Kariniemi <nicholas.kariniemi@gmail.com>
Date: Fri, 26 Sep 2014 11:53:19 +0300
Subject: [PATCH] Move to shared state

---
 src/clj/grub/core.clj             |  2 +-
 src/cljx/grub/shared_state.cljx   | 85 +++++++++++++++++++++++++++++++
 src/cljx/grub/state.cljx          | 82 -----------------------------
 src/test/grub/test/unit/state.clj |  2 +-
 4 files changed, 87 insertions(+), 84 deletions(-)
 create mode 100644 src/cljx/grub/shared_state.cljx
 delete mode 100644 src/cljx/grub/state.cljx

diff --git a/src/clj/grub/core.clj b/src/clj/grub/core.clj
index d892f09..5030d0f 100644
--- a/src/clj/grub/core.clj
+++ b/src/clj/grub/core.clj
@@ -2,7 +2,7 @@
   (:require [grub.websocket :as ws]
             [grub.db :as db]
             [grub.test.integration.core :as integration-test]
-            [grub.state :as state]
+            [grub.shared-state :as state]
             [ring.middleware.file :as file]
             [ring.util.response :as resp]
             [compojure.core :refer [defroutes GET POST]]
diff --git a/src/cljx/grub/shared_state.cljx b/src/cljx/grub/shared_state.cljx
new file mode 100644
index 0000000..157e125
--- /dev/null
+++ b/src/cljx/grub/shared_state.cljx
@@ -0,0 +1,85 @@
+(ns grub.shared-state
+  (:require [grub.diff :as diff]
+            [grub.message :as message]
+            [grub.sync :as sync]
+            #+clj [clojure.core.async :as a :refer [<! >! chan go]]
+            #+cljs [cljs.core.async :as a :refer [<! >! chan]])
+  #+cljs (:require-macros [cljs.core.async.macros :refer [go]]))
+
+;; Server state
+(def states (atom []))
+
+(defn make-server-agent 
+  ([in out states] (make-server-agent in out states sync/empty-state))
+  ([in out states initial-client-state]
+     (go (loop [client-state initial-client-state]
+           (when-let [msg (<! in)]
+             (condp = (:type msg)
+               :diff
+               (let [states* @states
+                     shadow (sync/get-history-state states* (:hash msg))]
+                 (if shadow
+                   (let [new-states (sync/apply-diff states* (:diff msg))
+                         new-shadow (diff/patch-state shadow (:diff msg))
+                         {:keys [diff hash]} (sync/diff-states new-states new-shadow)]
+                     (reset! states new-states)
+                     (>! out (message/diff-msg diff hash))
+                     (recur new-shadow))
+                   (let [state (sync/get-current-state @states)]
+                     (>! out (message/full-sync state))
+                     (recur state))))
+
+               :full-sync
+               (let [state (sync/get-current-state @states)]
+                 (>! out (message/full-sync state))
+                 (recur state))
+
+               :new-state
+               (let [{:keys [diff hash]} (sync/diff-states (:new-states msg) client-state)]
+                 (>! out (message/diff-msg diff hash))
+                 (recur client-state))
+               (recur client-state)))))))
+
+;; (defn make-client-agent 
+;;   ([in out states] (make-client-agent in out states sync/empty-state))
+;;   ([in out states initial-server-state]
+;;      (a/go-loop [server-state initial-server-state]
+;;                 (when-let [msg (<! in)]
+;;                   (condp = (:type msg)
+;;                     :diff
+;;                     (let [states* @states
+;;                           shadow (sync/get-history-state states* (:hash msg))]
+;;                       (if shadow
+;;                         (let [new-states (sync/apply-diff states* (:diff msg))
+;;                               new-shadow (diff/patch-state shadow (:diff msg))
+;;                               {:keys [diff hash]} (sync/diff-states new-states new-shadow)]
+;;                           (reset! states new-states)
+;;                           (recur new-shadow))
+;;                         (let [state (sync/get-current-state @states)]
+;;                           (>! out (message/full-sync state))
+;;                           (recur state))))
+
+;;                     :full-sync
+;;                     (let [state (:state msg)]
+;;                       (reset! states [state])
+;;                       (recur state))
+
+;;                     :new-state
+;;                     (let [{:keys [diff hash]} (sync/diff-states (:new-states msg) server-state)]
+;;                       (>! out (message/diff-msg diff hash)))
+;;                     (recur server-state))))))
+
+;; TODO: Remove watch, close up channels properly
+(defn sync-new-client! [>client <client]
+  (let [client-id (java.util.UUID/randomUUID)
+        state-changes (chan)
+        state-change-events (a/map< (fn [s] {:type :new-state :new-states s}) state-changes)
+        client-events (chan)]
+    (add-watch states client-id (fn [_ _ _ new-states] (a/put! state-changes new-states)))
+    (a/pipe (a/merge [<client state-change-events]) client-events)
+    (make-server-agent client-events >client states)))
+
+(defn init [to-db grubs recipes]
+  (reset! states (sync/initial-state grubs recipes))
+  (add-watch states :to-db (fn [_ _ old-states new-states] 
+                             (a/put! to-db (sync/get-current-state new-states)))))
diff --git a/src/cljx/grub/state.cljx b/src/cljx/grub/state.cljx
deleted file mode 100644
index f4921e7..0000000
--- a/src/cljx/grub/state.cljx
+++ /dev/null
@@ -1,82 +0,0 @@
-(ns grub.state
-  (:require [grub.diff :as diff]
-            [grub.message :as message]
-            [grub.sync :as sync]
-            [clojure.core.async :as a :refer [<! >! chan go]]))
-
-;; Server state
-(def states (atom []))
-
-(defn make-server-agent 
-  ([in out states] (make-server-agent in out states sync/empty-state))
-  ([in out states initial-client-state]
-     (a/go-loop [client-state initial-client-state]
-                (when-let [msg (<! in)]
-                  (condp = (:type msg)
-                    :diff
-                    (let [states* @states
-                          shadow (sync/get-history-state states* (:hash msg))]
-                      (if shadow
-                        (let [new-states (sync/apply-diff states* (:diff msg))
-                              new-shadow (diff/patch-state shadow (:diff msg))
-                              {:keys [diff hash]} (sync/diff-states new-states new-shadow)]
-                          (reset! states new-states)
-                          (>! out (message/diff-msg diff hash))
-                          (recur new-shadow))
-                        (let [state (sync/get-current-state @states)]
-                          (>! out (message/full-sync state))
-                          (recur state))))
-
-                    :full-sync
-                    (let [state (sync/get-current-state @states)]
-                      (>! out (message/full-sync state))
-                      (recur state))
-
-                    :new-state
-                    (let [{:keys [diff hash]} (sync/diff-states (:new-states msg) client-state)]
-                      (>! out (message/diff-msg diff hash)))
-                    (recur client-state))))))
-
-(defn make-client-agent 
-  ([in out states] (make-client-agent in out states sync/empty-state))
-  ([in out states initial-server-state]
-     (a/go-loop [server-state initial-server-state]
-                (when-let [msg (<! in)]
-                  (condp = (:type msg)
-                    :diff
-                    (let [states* @states
-                          shadow (sync/get-history-state states* (:hash msg))]
-                      (if shadow
-                        (let [new-states (sync/apply-diff states* (:diff msg))
-                              new-shadow (diff/patch-state shadow (:diff msg))
-                              {:keys [diff hash]} (sync/diff-states new-states new-shadow)]
-                          (reset! states new-states)
-                          (recur new-shadow))
-                        (let [state (sync/get-current-state @states)]
-                          (>! out (message/full-sync state))
-                          (recur state))))
-
-                    :full-sync
-                    (let [state (:state msg)]
-                      (reset! states [state])
-                      (recur state))
-
-                    :new-state
-                    (let [{:keys [diff hash]} (sync/diff-states (:new-states msg) server-state)]
-                      (>! out (message/diff-msg diff hash)))
-                    (recur server-state))))))
-
-;; TODO: Remove watch, close up channels properly
-(defn sync-new-client! [>client <client]
-  (let [client-id (java.util.UUID/randomUUID)
-        state-changes (chan)
-        state-change-events (a/map< (fn [s] {:type :new-state :new-states s}) state-changes)
-        client-events (chan)]
-    (add-watch states client-id (fn [_ _ _ new-states] (a/put! state-changes new-states)))
-    (a/pipe (a/merge [<client state-change-events]) client-events)
-    (make-server-agent client-events >client states)))
-
-(defn init [to-db grubs recipes]
-  (reset! states (sync/initial-state grubs recipes))
-  (add-watch states :to-db (fn [_ _ old-states new-states] 
-                             (a/put! to-db (sync/get-current-state new-states)))))
diff --git a/src/test/grub/test/unit/state.clj b/src/test/grub/test/unit/state.clj
index 186229f..8078d0e 100644
--- a/src/test/grub/test/unit/state.clj
+++ b/src/test/grub/test/unit/state.clj
@@ -1,5 +1,5 @@
 (ns grub.test.unit.state
-  (:require [grub.state :as state]
+  (:require [grub.shared-state :as state]
             [clojure.test :refer :all]
             [hasch.core :as hasch]
             [clojure.core.async :as a :refer [<!! >!! chan go]]))