Enable Drupal content administrators to embed dynamic CiviCRM content

To enable Drupal content administrators to embed dynamic CiviCRM content, we can implement a Drupal "filter" which evaluates Drupal nodes using CiviCRM's Smarty engine. Among other things, the Smarty engine includes a

{crmAPI}

function which can be used to load data.

Some documentation about Drupal's filter system can be found at:

• D6: http://api.drupal.org/api/drupal/developer--hooks--core.php/function/hook_filter/6
• D7: http://api.drupal.org/api/drupal/modules--filter--filter.api.php/function/hook_filter_info/7

Note that, much like CiviMail's Smarty support and Drupal's PHP support, this feature can impact a site's security posture; as with those features, this should not be enabled unless an administrator opts-in. Fortunately, Drupal's format/filter system already provides a means for enabling/disabling filters (which are generally disabled by default) and configuring RBAC.