I have a gateway that handles attachments that only make sense for registered
users who have the appropriate plugin.
If we detect a user that's not registered is a recipient (possibly one of
several), then we need to customize a message just for that user with the
attachment stripped and replaced instead with a message saying, "Visit this URL
to install the plug-in, register, and pick up your attachment."
We want something like action_replace_with_url() but not quite.
First, the putting the attachment into a lookaside server we'll handle
ourselves (or rather, it's already handled).
So I just need to generate the URL, format a replacement entity, call
action_rebuild(), and ensure that this message gets delivered to the one
recipient (even if the original @Recipients > 1).
How do I go about most efficiently pulling him out of the group-delivery
instance and generate a new unique message just for him?
I can't use stream_by_recipient() because I don't know which attachments need
to be removed until I hit filter() and not filter_begin().
Note also that each attachment of the proprietary type would need to be
uniquely rewritten, but the end-user still only gets one (per-user unique)
message.
An example: message M comes along with recipients r1, r2, and r3.
It also has attachments A, B, and C.
It will get delivered to {r1, r2} as is, but it will also be rewritten as:
M(r3) to r3 with attachments A, B, C replaced with new entities A(r3), B(r3),
C(r3) which r3 can then individually retrieve.
What's the best way to do this?
Thanks,
-Philip
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