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lib/plaid/util.ex
defmodule Plaid.Util do
@moduledoc false
@doc """
Put a key-value pair on a map, only if it exists in a source map.
## Examples
iex> maybe_put(%{foo: "bar"}, :test, %{test: 1})
%{foo: "bar", test: 1}
iex> maybe_put(%{}, :stuff, %{test: 1})
%{}
"""
@spec maybe_put(map(), any(), map()) :: map()
def maybe_put(map, key, source) do
case Map.has_key?(source, key) do
true -> Map.put(map, key, Map.get(source, key))
false -> map
end
end
end