More Attachment types

[not-so-smart]

I analyzed a bunch of messages from a large group and found these attachment types. (Sample: 80,000 messages from 1 group, August 2020-August 2021)

These ones are already documented:

• [x] image
• [x] video
• [x] emoji
• [x] reply
• [x] mentions

These ones are documented, but they didn't show up at all in my sample: (perhaps deprecated?)

• [x] location
• [x] split

These ones still need documentation:

• [ ] event
• [ ] file
• [ ] linked_image
• [ ] poll
• [ ] autokicked_member

I'll add examples of each in the comments

[2CATteam]

Note that polls are already documented here, but it doesn't say anything about how to manually add them to a message, because as far as I know, sending a message about an event is an intrinsic part of creating it - you can't make it without a message about it being sent.

[not-so-smart]

Note that polls are already documented here, but it doesn't say anything about how to manually add them to a message, because as far as I know, sending a message about an event is an intrinsic part of creating it - you can't make it without a message about it being sent.

See #5, some attachments can't be sent (only received) and should be labelled as such on the docs

[2CATteam]

Makes sense, carry on

[not-so-smart]

type: event

see #6 for details

type: file

{
    type:    "file",
    file_id: string,
}

• file_id - Full UUID string
  • The ID of the file.
  • Further research needed:
  • what is the file ID used for? how do you retrieve it?

type: poll

{
    type:    "poll",
    poll_id: string,
}

• poll_id - Timestamp(?) string
  • The ID can be parsed as a timestamp (microsecond precision)
  • Further research needed:
  • what does the timestamp correspond to? poll start/end date?
  • is this really a microsecond timestamp or just a second timestamp with some other 6-digit number appended to it?

type: linked_image

{
    type: "linked_image",
    url:  string,
}

• url - URL string
  • The URL will always be an i.groupme.com link - (?)

type: autokicked_member

{
    type:    "autokicked_member",
    user_id: string,
}

• user_id - User ID string
  • The ID of the user who was automatically removed.