Write a plugin for restricting the Contacts in the Associated View while adding contacts. We wanted to do this when the contact does not have the status reason ‘Approved’ by showing an error message and sending an email to the owner of the contact

Hi community, Write a plugin for restricting the Contacts in the Associated View while adding contacts. We wanted to do this when the contact does not have the status reason ‘Approved’ by showing an error message and sending an email to the owner of the contact can anyone please help me for write a plugin for this.