- Groupchats now support XEP-0313 Message Archive Management (MAM)!
- This uses the history stored in the sqlite database, as implemented in the
previous commits.
- The QUERY-ARCHIVE megafunction builds up a SQL query to get stuff out of the
database, in accordance with provided MAM + RSM parameters.
- Notably, various hacks are in here that need to be fixed.
- IQ 'set's are now processed, which means we needed to add a stub impl of
Schrödinger's Chat so people don't drop out of MUCs all of a sudden.
(Well, it just responds to every ping indiscriminately...)
- Oh also the new presence subscription stuff from earlier is borked.
- Instead of taking a WhatsApp message and sending an XMPP one directly, we now
generate an XMPP-MESSAGE object, and have functions to deliver said object
and make said object from a WhatsApp message.
- This paves the way to storing said XMPP-MESSAGEs in a database, so we can
actually do message history / MAM. Yay!
- This commit contains initial support for uploading and sending images natively
-- i.e. a WhatsApp image upload, instead of sending through a bare link.
- All images supported by the OPTICL library are supported; this is because WA
needs us to generate a jpeg thumbnail for the image (which can probably be
made smaller)
- Importantly, this functionality is currently a trivial DoS vector: simply send
a large file (or an infinite file, like time.gif) and it ALL gets downloaded
and buffered into RAM...!
- At least this is limited to users who have actually registered with the
bridge.
- Failing to send the image in any way results in an XMPP error getting reported
back to the sender.
- Also, the initial registration QR code upload thing now happens in another
thread.
- The new PUT-WHATSAPP-MEDIA-FILE can encrypt and upload a blob of file data to
WhatsApp, and returns everything we'd need to make a protobuf message out of
that.
- However, important functionality is still absent: whatscl needs to gain some
support for sending protobuf messages for file uploads, and we'd also need to
integrate with some image/video libraries in order to do related processing
tasks.
- For example, uploading an image requires producing a JPEG thumbnail for it,
as well as figuring out its size.
- Uploading audio would require conversion to Opus.
- Maybe we could attempt to integrate with ffmpeg or something? This is likely
to get tricky.
