state machine with requests per guild

lib/plantid_discord_bot/process_registry.ex

@@ -0,0 +1,17 @@
+defmodule PlantIdDiscordBot.ProcessRegistry do
+  def start_link do
+    Registry.start_link(keys: :unique, name: __MODULE__)
+  end
+
+  def via_tuple(key) do
+    {:via, Registry, {__MODULE__, key}}
+  end
+
+  def child_spec(_) do
+    Supervisor.child_spec(
+      Registry,
+      id: __MODULE__,
+      start: {__MODULE__, :start_link, []}
+    )
+  end
+end