1 files changed, 33 insertions, 5 deletions
diff --git a/lib/app/chat.ex b/lib/app/chat.ex
index 42991ce..a9cfb1e 100644
--- a/lib/app/chat.ex
+++ b/lib/app/chat.ex
@@ -39,7 +39,15 @@ defmodule SApp.Chat do
     GenServer.cast(Shard.Manager, {:register, id, manifest, self()})
     GenServer.cast(self(), :init_pull)
 
-    {:ok, %{channel: channel, id: id, manifest: manifest, store: store, peers: MapSet.new}}
+    {:ok,
+      %{channel: channel,
+        id: id,
+        manifest: manifest,
+        store: store, 
+        peers: MapSet.new,
+        subs: MapSet.new,
+      }
+    }
   end
 
   @doc """
@@ -49,6 +57,11 @@ defmodule SApp.Chat do
     {:reply, state.manifest, state}
   end
 
+  def handle_call({:read_history, start, num}, _from, state) do
+    ret = ML.read(state.store, start, num)
+    {:reply, ret, state}
+  end
+
   @doc """
   Implementation of the :redundant handler: if another process is already
   synchronizing this channel then we exit.
@@ -80,6 +93,12 @@ defmodule SApp.Chat do
                msg}
     new_state = %{state | store: ML.insert(state.store, msgitem)}
 
+    for pid <- state.subs do
+      if Process.alive?(pid) do
+        send(pid, {:chat_send, state.channel, msgitem})
+      end
+    end
+
     for peer <- state.peers do
       push_messages(new_state, peer, nil, 5)
     end
@@ -97,6 +116,11 @@ defmodule SApp.Chat do
     {:noreply, %{ state | peers: new_peers }}
   end
 
+  def handle_cast({:subscribe, pid}, state) do
+    new_subs = MapSet.put(state.subs, pid)
+    {:noreply, %{ state | subs: new_subs }}
+  end
+
   @doc """
   Implementation of the :msg handler, which is the main handler for messages
   comming from other peers concerning this chat room.
@@ -110,7 +134,7 @@ defmodule SApp.Chat do
     case msg do
       {:get_manifest} ->
         Shard.Manager.send(peer_id, {state.id, {:manifest, state.manifest}})
-      {:get, start} -> push_messages(peer_id, state, start, 20)
+      {:get, start} -> push_messages(state, peer_id, start, 20)
       {:info, _start, list, rest} ->
         if rest != nil and not ML.has(state.store, rest) do
           Shard.Manager.send(peer_id, {state.id, {:get, rest}})
@@ -131,7 +155,7 @@ defmodule SApp.Chat do
   end
 
   def handle_cast({:deferred_insert, list}, state) do
-    new_store = ML.insert_many(state.store, list, (fn msg -> msg_callback(state.channel, msg) end))
+    new_store = ML.insert_many(state.store, list, (fn msg -> msg_callback(state, msg) end))
     {:noreply, %{state | store: new_store}}
   end
 
@@ -143,8 +167,12 @@ defmodule SApp.Chat do
     end
   end
 
-  defp msg_callback(chan, {ts, nick, msg}) do
-    IO.puts "#{ts |> DateTime.from_unix! |> DateTime.to_iso8601}  ##{chan}  <#{nick}> #{msg}"
+  defp msg_callback(state, {ts, nick, msg}) do
+    for pid <- state.subs do
+      if Process.alive?(pid) do
+        send(pid, {:chat_recv, state.channel, {ts, nick, msg}})
+      end
+    end
   end
 
   defp msg_cmp({ts1, nick1, msg1}, {ts2, nick2, msg2}) do