mobilizon.chapril.org-mobil.../lib/graphql/error.ex

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defmodule Mobilizon.GraphQL.Error do
@moduledoc """
Module to handle errors in GraphQL
"""
require Logger
alias __MODULE__
import Mobilizon.Web.Gettext
defstruct [:code, :message, :status_code, :field]
# Error Tuples
# ------------
# Regular errors
def normalize({:error, reason}) do
handle(reason)
end
# Ecto transaction errors
def normalize({:error, _operation, reason, _changes}) do
handle(reason)
end
# Unhandled errors
def normalize(other) do
handle(other)
end
# Handle Different Errors
# -----------------------
defp handle(code) when is_atom(code) do
{status, message} = metadata(code)
%Error{
code: code,
message: message,
status_code: status
}
end
defp handle(errors) when is_list(errors) do
Enum.map(errors, &handle/1)
end
defp handle(%Ecto.Changeset{} = changeset) do
changeset
|> Ecto.Changeset.traverse_errors(fn {err, _opts} -> err end)
|> Enum.map(fn {k, v} ->
%Error{
code: :validation,
message: v,
field: k,
status_code: 422
}
end)
end
defp handle(reason) when is_binary(reason) do
%Error{
code: :unknown_error,
message: reason,
status_code: 500
}
end
# ... Handle other error types here ...
defp handle(other) do
Logger.error("Unhandled error term:\n#{inspect(other)}")
handle(:unknown)
end
# Build Error Metadata
# --------------------
defp metadata(:unknown_resource), do: {400, dgettext("errors", "Unknown Resource")}
defp metadata(:invalid_argument), do: {400, dgettext("errors", "Invalid arguments passed")}
defp metadata(:unauthenticated), do: {401, dgettext("errors", "You need to be logged in")}
defp metadata(:password_hash_missing),
do: {401, dgettext("errors", "Reset your password to login")}
defp metadata(:incorrect_password), do: {401, dgettext("errors", "Invalid credentials")}
defp metadata(:unauthorized),
do: {403, dgettext("errors", "You don't have permission to do this")}
defp metadata(:not_found), do: {404, dgettext("errors", "Resource not found")}
defp metadata(:user_not_found), do: {404, dgettext("errors", "User not found")}
defp metadata(:post_not_found), do: {404, dgettext("errors", "Post not found")}
defp metadata(:event_not_found), do: {404, dgettext("errors", "Event not found")}
defp metadata(:group_not_found), do: {404, dgettext("errors", "Group not found")}
defp metadata(:resource_not_found), do: {404, dgettext("errors", "Resource not found")}
defp metadata(:discussion_not_found), do: {404, dgettext("errors", "Discussion not found")}
defp metadata(:unknown), do: {500, dgettext("errors", "Something went wrong")}
defp metadata(code) do
Logger.warn("Unhandled error code: #{inspect(code)}")
{422, to_string(code)}
end
end