DataSift\Storyplayer\Cli\PlayStory_Command::addStoriesFromFolder PHP Method

    protected function addStoriesFromFolder(CliEngine $engine, Injectables $injectables, $folder)
    {
        // find everything under the folder
        $filenames = $this->findStoriesInFolder($folder);
        // did we find anything?
        if (!count($filenames)) {
            $msg = "no stories found in '{$folder}'" . PHP_EOL . PHP_EOL . "do your stories' filenames end in 'Story.php'?";
            $this->output->logCliError($msg);
            exit(1);
        }
        // create a set of story players
        $storiesToPlay = [];
        foreach ($filenames as $filename) {
            $storiesToPlay[] = new Story_Player($filename, $injectables);
        }
        // all done
        return $storiesToPlay;
    }