absinthe middleware for explicit reporting to sentry.ex

defmodule MyGraph.Middlewares.ResolutionWithErrorReporting do
  @moduledoc """
  Middleware to handle application errors and exceptions
  """
  require Logger

  @behaviour Absinthe.Middleware

  @doc """
  Call this on existing middleware to replace instances of
  `Resolution` middleware with `ResolutionWithErrorReporting`
  """
  @spec apply(list()) :: list()
  def apply(middleware) when is_list(middleware) do
    Enum.map(middleware, fn
      {{Absinthe.Resolution, :call}, resolver} -> {__MODULE__, resolver}
      other -> other
    end)
  end

  @impl true
  def call(resolution, resolver) do
    Absinthe.Resolution.call(resolution, resolver)
  rescue
    exception ->
      _ = Sentry.capture_exception(exception)

      # If our graph schema didn't handle the error
      # we want an HTTP 500, not a silent failure
      # e.g. with a graph result including an error like
      #   Absinthe.Resolution.put_result(resolution, {:error, :unknown})
      reraise exception, __STACKTRACE__
  end
end