From 1e91dc596fd2f7fdd96b7fd2fc50724f93e46529 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Fri, 12 Oct 2018 14:40:21 +0200
Subject: Move and reorganize some stuff

---
 shardweb/lib/channels/chat_channel.ex | 72 +++++++++++++++++++++++++++++++++++
 shardweb/lib/channels/user_socket.ex  | 49 ++++++++++++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 shardweb/lib/channels/chat_channel.ex
 create mode 100644 shardweb/lib/channels/user_socket.ex

(limited to 'shardweb/lib/channels')

diff --git a/shardweb/lib/channels/chat_channel.ex b/shardweb/lib/channels/chat_channel.ex
new file mode 100644
index 0000000..3e51c3a
--- /dev/null
+++ b/shardweb/lib/channels/chat_channel.ex
@@ -0,0 +1,72 @@
+defmodule ShardWeb.ChatChannel do
+  use ShardWeb, :channel
+
+  require Logger
+
+  def join("room:" <> room_name, payload, socket) do
+    if authorized?(payload) do
+
+      pid = Shard.Manager.find_or_start %SApp.Chat.Manifest{channel: room_name}
+      socket = assign(socket, :pid, pid)
+
+      GenServer.cast(pid, {:subscribe, self()})
+      send(self(), :after_join)
+      
+      {:ok, socket}
+    else
+      {:error, %{reason: "unauthorized"}}
+    end
+  end
+
+  def handle_info(:after_join, socket) do
+    GenServer.call(socket.assigns.pid, {:read_history, nil, 100})
+    |> Enum.each(fn {{pk, msgbin, _sign}, true} ->
+        {_ts, msg} = SData.term_unbin msgbin
+        nick = SApp.Identity.get_nick pk
+        push(socket, "shout", %{
+          name: nick,
+          pk16: Shard.Keys.pk_display(pk),
+          message: msg,
+        }) 
+      end)
+    {:noreply, socket}
+  end
+
+  def handle_info({:chat_recv, _chan, {pk, msgbin, _sign}}, socket) do
+    {_ts, msg} = SData.term_unbin msgbin
+    nick = SApp.Identity.get_nick pk
+    Logger.info("#{inspect self()} :chat_recv #{inspect msg}")
+    push socket, "shout", %{"name" => nick,
+      "pk16" => Shard.Keys.pk_display(pk),
+      "message" => msg}
+    {:noreply, socket}
+  end
+
+  def handle_info({:chat_send, _, _}, socket) do
+    {:noreply, socket}
+  end
+
+  # Channels can be used in a request/response fashion
+  # by sending replies to requests from the client
+  def handle_in("ping", payload, socket) do
+    {:reply, {:ok, payload}, socket}
+  end
+
+  # It is also common to receive messages from the client and
+  # broadcast to everyone in the current topic (room:lobby).
+  def handle_in("shout", payload, socket) do
+    pk = socket.assigns.pk
+    nick = SApp.Identity.get_nick pk
+    payload = Map.put(payload, "name", nick)
+    payload = Map.put(payload, "pk16", Shard.Keys.pk_display pk)
+
+    GenServer.cast(socket.assigns.pid, {:chat_send, pk, payload["message"]})
+    broadcast socket, "shout", payload
+    {:noreply, socket}
+  end
+
+  # Add authorization logic here as required.
+  defp authorized?(_payload) do
+    true
+  end
+end
diff --git a/shardweb/lib/channels/user_socket.ex b/shardweb/lib/channels/user_socket.ex
new file mode 100644
index 0000000..b4136bd
--- /dev/null
+++ b/shardweb/lib/channels/user_socket.ex
@@ -0,0 +1,49 @@
+defmodule ShardWeb.UserSocket do
+  use Phoenix.Socket
+
+  require Logger
+
+  ## Channels
+  channel "room:*", ShardWeb.ChatChannel
+
+  ## Transports
+  transport :websocket, Phoenix.Transports.WebSocket
+  # transport :longpoll, Phoenix.Transports.LongPoll
+
+  # Socket params are passed from the client and can
+  # be used to verify and authenticate a user. After
+  # verification, you can put default assigns into
+  # the socket that will be set for all channels, ie
+  #
+  #     {:ok, assign(socket, :user_id, verified_user_id)}
+  #
+  # To deny connection, return `:error`.
+  #
+  # See `Phoenix.Token` documentation for examples in
+  # performing token verification on connect.
+  def connect(params, socket) do
+    case Base.decode16(params["pk"]) do
+      {:ok, pk} ->
+        if Shard.Keys.have_sk? pk do
+          socket = assign(socket, :pk, pk)
+          {:ok, socket}
+        else
+          Logger.warn("Invalid pk at user_socket.connect... #{params["pk"]}")
+          :error
+        end
+      _ -> :error
+    end
+  end
+
+  # Socket id's are topics that allow you to identify all sockets for a given user:
+  #
+  #     def id(socket), do: "user_socket:#{socket.assigns.user_id}"
+  #
+  # Would allow you to broadcast a "disconnect" event and terminate
+  # all active sockets and channels for a given user:
+  #
+  #     ShardWeb.Endpoint.broadcast("user_socket:#{user.id}", "disconnect", %{})
+  #
+  # Returning `nil` makes this socket anonymous.
+  def id(_socket), do: nil
+end
-- 
cgit v1.2.3