From f2cbf372008f2ef4d99cbd4ad5944b92e9ba6071 Mon Sep 17 00:00:00 2001
From: Gustavo Santos Ferreira <gustavosantosfe@gmail.com>
Date: Mon, 17 Dec 2018 15:20:35 -0200
Subject: [PATCH] genserver that executes validator data imports every 24 hours

---
 apps/explorer/config/config.exs               |  4 +++
 apps/explorer/lib/explorer/application.ex     |  3 +-
 .../explorer/validator/metadata_processor.ex  | 31 +++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 apps/explorer/lib/explorer/validator/metadata_processor.ex

diff --git a/apps/explorer/config/config.exs b/apps/explorer/config/config.exs
index 4cabe0c008..c58234ec9b 100644
--- a/apps/explorer/config/config.exs
+++ b/apps/explorer/config/config.exs
@@ -36,6 +36,10 @@ if System.get_env("METADATA_CONTRACT") && System.get_env("VALIDATORS_CONTRACT")
   config :explorer, Explorer.Validator.MetadataRetriever,
     metadata_contract_address: System.get_env("METADATA_CONTRACT"),
     validators_contract_address: System.get_env("VALIDATORS_CONTRACT")
+
+  config :explorer, Explorer.Validator.MetadataProcessor, enabled: true
+else
+  config :explorer, Explorer.Validator.MetadataProcessor, enabled: false
 end
 
 if System.get_env("SUPPLY_MODULE") == "TransactionAndLog" do
diff --git a/apps/explorer/lib/explorer/application.ex b/apps/explorer/lib/explorer/application.ex
index bf124baa35..1f088a6578 100644
--- a/apps/explorer/lib/explorer/application.ex
+++ b/apps/explorer/lib/explorer/application.ex
@@ -38,7 +38,8 @@ defmodule Explorer.Application do
       configure(Explorer.Counters.TokenHoldersCounter),
       configure(Explorer.Counters.TokenTransferCounter),
       configure(Explorer.Counters.BlockValidationCounter),
-      configure(Explorer.Counters.AddressesWithBalanceCounter)
+      configure(Explorer.Counters.AddressesWithBalanceCounter),
+      configure(Explorer.Validator.MetadataProcessor)
     ]
     |> List.flatten()
   end
diff --git a/apps/explorer/lib/explorer/validator/metadata_processor.ex b/apps/explorer/lib/explorer/validator/metadata_processor.ex
new file mode 100644
index 0000000000..ebc9db9d46
--- /dev/null
+++ b/apps/explorer/lib/explorer/validator/metadata_processor.ex
@@ -0,0 +1,31 @@
+defmodule Explorer.Validator.MetadataProcessor do
+  @moduledoc """
+  module to periodically retrieve and update metadata belonging to validators
+  """
+  use GenServer
+  alias Explorer.Validator.{MetadataImporter, MetadataRetriever}
+
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
+  end
+
+  @impl true
+  def init(args) do
+    send(self(), :import_and_reschedule)
+    {:ok, args}
+  end
+
+  @impl true
+  def handle_info(:import_and_reschedule, state) do
+    MetadataRetriever.fetch_data()
+    |> MetadataImporter.import_metadata()
+
+    reschedule()
+
+    {:noreply, state}
+  end
+
+  defp reschedule do
+    Process.send_after(self(), :import_and_reschedule, :timer.hours(24))
+  end
+end