Add a simple echo server

1 files changed, 42 insertions, 9 deletions

diff --git a/lib/chessh/shell.ex b/lib/chessh/shell.ex
index f9f475d..cf65ad4 100644
--- a/lib/chessh/shell.ex
+++ b/lib/chessh/shell.ex
@@ -1,18 +1,51 @@
 defmodule Chessh.Shell do
   use Sshd.ShellHandler
 
-  def on_shell(_username, _public_key, _ip, _port) do
-    :ok =
-      IO.puts(
-        "Interactive example SSH shell - type exit ENTER to quit and it is running on #{inspect(self())}"
-      )
+  def on_shell(_username, _pubkey, _ip, _port) do
+    IO.puts("Looks like you're on #{inspect(self())}")
+    loop()
   end
 
-  def on_connect(_username, _ip, _port, _method) do
-    Logger.debug("Connection established")
+  def on_connect(username, ip, port, method) do
+    Logger.debug(fn ->
+      """
+      Incoming SSH shell #{inspect(self())} requested for #{username} from #{inspect(ip)}:#{inspect(port)} using #{inspect(method)}
+      """
+    end)
   end
 
-  def on_disconnect(_username, _ip, _port) do
-    Logger.debug("Connection disestablished")
+  def on_disconnect(username, ip, port) do
+    Logger.debug(fn ->
+      "Disconnecting SSH shell for #{username} from #{inspect(ip)}:#{inspect(port)}"
+    end)
+  end
+
+  defp loop() do
+    self_pid = self()
+    IO.write([IO.ANSI.home(), IO.ANSI.clear()])
+    IO.puts("#{inspect(:io.columns())}")
+    IO.puts("#{inspect(:io.rows())}")
+    input = spawn(fn -> io_get(self_pid) end)
+    wait_input(input)
+  end
+
+  defp wait_input(input) do
+    receive do
+      {:hello, message} ->
+        IO.puts(message)
+        loop()
+
+      {:input, ^input, x} ->
+        IO.puts(x)
+        loop()
+
+      x ->
+        Logger.debug(inspect(x))
+        loop()
+    end
+  end
+
+  defp io_get(pid) do
+    send(pid, {:input, self(), IO.gets("")})
   end
 end