Create a custom node view as node-name.json for download

Hi,

I'm building a tool that is meant to generate a json file for the user to download. The download link is displayed on the node page.

Here is the live example: https://boycottplus.org/campaign/new-hope

I want to take the node data and output as a json file, maybe https://boycottplus.org/campaign/new-hope.json

I've looked into node views and have a node view module for creating a json view. Now I don't know how I could tell drupal to look for the .json extension and then to produce the correct version of the node view.

function jsonview_entity_info_alter(&$entity_info) {
  $entity_info['node']['view modes']['jsonview'] = array(
    'label' => t('json View'),
    'custom settings' => TRUE,
  );
} 

function jsonview_preprocess_node(&$vars) {
  if($vars['view_mode'] == 'jsonview') {
    $vars['theme_hook_suggestions'][] = 'node__' . $vars['type'] . '__json';
  }
}