So I have been working on an update to my site to allow users to log in via one-time login links when they receive a Private Message. Unfortunately, this kind of feature recently has been in the news as a security issue, so I want to make sure that I give users a way to opt out.
The one-time login links are provided by the Login One Time module. The e-mail notifications are provided by the Privatemsg module's PM E-mail Notify submodule, but ideally the solution would also work for e-mails sent by Rules, system e-mails, etc.
How I add the login link
In the PM E-mail Notify UI, in the body of the "You have received a new message" e-mail, I insert the following token:
and the whole link is:
This provides the user with a one-time login link that looks like this:
?edit[name]=email@example.com part is a query string for the Prepopulate module which pre-fills the e-mail address on the login form in the event that the one-time login link has already been used.)
What I want to do
- Add a boolean field to the user profile, "Do not send me one-time login links in my e-mail."
- Somehow check the value of that field when sending e-mail notifications.
Is there a robust way to do this? Here is what I have thought of so far:
- Instead of using Privatemsg to send the e-mail notifications, attempt to create the notifications in Rules. But if I do this, then I cannot use any of the nice Privatemsg configuration settings (such as allowing users to choose when they would like to receive e-mails, e.g. every time they receive a message, only once per sender, etc.)
- I could somehow create a token that gives the one-time link if the user has not opted out or the regular link if the user has opted out. (I'm not really sure how to do this.)
- I could hack the PM E-mail Notify submodule to do what I want.
Ideally, I want to do the following: if a user has opted out, I want to replace the one-time login link in any e-mail sent by the site with a link to the login form.
Note: My site is multilingual, and I am translating the e-mails sent with the site using the Variable and i18n modules. So, any solution needs to be robust enough to handle multilingual e-mails.