plantid-discord-bot/lib/metrics/message.ex

defmodule PlantIdDiscordBot.Metrics.Message do
  def send() do
    PlantIdDiscordBot.Metrics.requests()
    |> format_message()
    |> do_send_message()
  end

  defp format_message(data) do
    embeds =
      Enum.map(data, fn {guild_id, metrics} ->
        first_request_at =
          DateTime.truncate(metrics.first_request_at, :second)
          |> DateTime.to_string()

        last_request_at =
          DateTime.truncate(metrics.last_request_at, :second)
          |> DateTime.to_string()

        %{
          title: metrics.guild_name,
          fields: [
            %{name: "Guild ID", value: guild_id, inline: true},
            %{name: "First Request At", value: first_request_at, inline: true},
            %{name: "Last Request At", value: last_request_at, inline: true},
            %{name: "Total Requests", value: metrics.total_requests, inline: true}
          ]
        }
      end)

    %{embeds: embeds}
  end

  defp do_send_message(data) do
    webhook_url = Application.get_env(:plantid_discord_bot, :metrics_webhook_url)
    body = Jason.encode!(data)
    headers = [{"Content-Type", "application/json"}]
    HTTPoison.post!(webhook_url, body, headers)
  end
end