1 files changed, 71 insertions, 0 deletions
diff --git a/src/site.clj b/src/site.clj
new file mode 100755
index 0000000..33b1bb3
--- /dev/null
+++ b/src/site.clj
@@ -0,0 +1,71 @@
+; site.clj
+
+(ns pichat
+  (:import java.lang.System)
+  (:use compojure
+        clojure.contrib.json.write))
+
+(defstruct user-struct :nick :last-seen)
+(defstruct message-struct :nick :content :timestamp)
+
+(def users (ref {}))
+(def messages (ref []))
+
+(defn resp-error [message]
+  {:status 400 :headers {} :body message})
+
+(defn resp-success [message]
+  {:status 200 :headers {} :body (json-str message)})
+
+(defn join-success [nick]
+  (alter users assoc nick (struct user-struct nick (System/currentTimeMillis)))
+  (let [users (keys @users)
+        messages (take 20 @messages)
+        data {"users" users "messages" messages}]
+    [(session-assoc :nick nick)
+     (resp-success data)]))
+
+(defn try-join [params]
+  (let [nick (params :nick)]
+    (dosync
+     (if (contains? @users nick)
+       (resp-error "NICK_TAKEN")
+       (join-success nick)))))
+
+(defn new-messages [since]
+  (reverse (take-while (fn [m] (> (m :timestamp) since)) @messages)))
+
+(defn refresh [nick]
+  (dosync
+   (let [last-seen (get-in @users [nick :last-seen])]
+     (alter users assoc-in [nick :last-seen] (System/currentTimeMillis))
+     (resp-success {"messages" (new-messages last-seen)}))))
+
+(defn swap [f]
+  (fn [& more] (apply f (reverse more))))
+
+(defn msg [session params]
+  (dosync
+   (let [nick (session :nick)
+         content (params :content)
+         msg (struct message-struct nick content (System/currentTimeMillis))]
+     (if (contains? @users nick)
+       (do (alter messages (swap cons) msg)
+           (resp-success "OK"))
+       (resp-error "UNKNOWN_USER")))))
+
+(defroutes pichat
+  (GET "/" (serve-file "static" "index.html"))
+  (GET "/static/*" (or (serve-file "static" (params :*))
+                       :next))
+  (GET "/join" (try-join params))
+  (GET "/refresh" (refresh (session :nick)))
+  (GET "/msg" (msg session params))
+  (ANY "*" [404 "Page not found"]))
+
+(decorate pichat 
+  (with-mimetypes)
+  (with-session {:type :memory, :expires (* 60 60)}))
+
+(run-server {:port 8080}
+  "/*" (servlet pichat))