Eliminate code duplication in choosing notifier.
Eliminate code duplication in choosing notifier.

Related: #134.

lalomartins/brunch,ondreian/brunch,PeterDaveHello/brunch,kidaa/brunch,brunch/brunch,rlugojr/brunch,justinwoo/brunch,hellyeahllc/brunch,Flaise/brunch,hayesgm/brunch