Is there a flag hook (flag module) which is called when a flagged node is saved? I am using the flag module to flag content.

Say user A flags a node. When user B updates the node, I want to send a mail to the user A (who flagged the node - I know I can use the Notifications and Messaging module but I want to send a notification in another way).

Is there an hook called when a flagged node is saved? So I can tap in on that hook and then retrieve a list of all users who flagged the node?

Thanks!

Paul
Is there an hook called when a flagged node is saved ?




No


However, you can use hook_node_update to trigger on a regular node save and check users who have flagged the current node ID. 

You can also do most of the work without any coding using Rules, Views, Views Bulk Operations and obviously, Flag module.