Exclude trash from save_post
I have a function which processes custom metabox data on saving my custom post type:
add_action('save_post_customtypehere','myown_save_customtype_fn');
function myown_save_customtype_fn($ID) { ... }
However, the function also runs when I trash items within this CPT (I guess it's effectively saving the post to change post_status to trash). Without the metabox being present, my function ends up clearing things like post_name (not great if I need to restore from trash!).
I have two thoughts but can't quite get across the finishing line with them:
1) In order to update post data I use remove_action() and add_action() again around wp_update_post(array('post_key'=$sanitized_form_input)) - as per the codex instructions, this is required to avoid an infinite loop. Could there be a similar way of excluding from a trash_post action (I already tried remove_action('trash_post','myown_save_customtype_fn' immediately after the original add_action line).
2) Is there something I can use in a conditional within myown_save_customtype_fn (along the lines of if (current action!='trash_post') { ...)