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All Things Elixir @ Surge Ventures Inc, the creators of Fresha
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lib/surgex/parser/parsers/uuid_parser.ex
defmodule Surgex.Parser.UuidParser do
@moduledoc """
This parser checks if the input is a proper UUID (with hyphens, case insentitive)
"""
alias Surgex.Parser.StringParser
@uuid_regex ~r/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/i
@spec call(term()) :: {:ok, String.t() | nil} | {:error, :invalid_uuid}
def call(nil), do: {:ok, nil}
def call(""), do: {:ok, nil}
def call(input) when is_binary(input) do
case StringParser.call(input, regex: @uuid_regex) do
{:ok, input} -> {:ok, input}
{:error, :bad_format} -> {:error, :invalid_uuid}
end
end
def call(_), do: {:error, :invalid_uuid}
end