Add Pleroma support

[hatkidchan]

For now it's not really possible to get posts from Pleroma instances. Though, it's kinda against "Mastodon" part of mastoposter, it still should be considered to be done.

For now all I know is that:

• Pleroma user IDs are not stringifyed integers
• Just using token, grabbed from Authorization header is not enough
• Pleroma DOES have lists
• To add Pleroma support, I have to add different source type.
• Pleroma statuses are close enough to the Mastodon statuses.
• Not all instances allow for easy application creation, token should be acquired either by grabbing it from PleromaFE or any other frontend for it.

TBD:

• Figure out how to authenticate yourself;
• Check if streaming API works as we expect it to be;
• Check for any differences in Status object, as well as any other (Account seems to be a bit different, that may cause some problems in the current implementation)

[hatkidchan]

Sending token both as access_token query parameter and Authorization: Bearer XXX does nothing, /api/v1/streaming still fails with Unauthorized status code. That's probably because default token doesn't have permissions to work with streaming.

  # List streams.
  def get_topic(
        "list",
        %User{id: user_id} = user,
        %Token{user_id: user_id} = oauth_token,
        %{"list" => id}
      ) do
    cond do
      OAuthScopesPlug.filter_descendants(["read", "read:lists"], oauth_token.scopes) == [] ->
        {:error, :unauthorized}

      Pleroma.List.get(id, user) ->
        {:ok, "list:" <> to_string(id)}

      true ->
        {:error, :bad_topic}
    end
  end

I know nothing about Pleroma API nor I have any experience in Elixir. If anyone does, please, explain to me how should I authenticate myself to work with streaming API.

[hatkidchan]

Ok turns out I was just dumb and forgot to change instance to Pleroma one :skull:

Anyways, it still fails because Pleroma (or at least EMR) doesn't return the "discoverable" field in the "account". I'll just make it fall back to False for the time being. Not like it's important for the crossposter

[hatkidchan]

@cmd410 pls confirm that Pleroma works

[cmd410]

Nope, pleroma doesn't work apparently. Literally nothing happens

[hatkidchan]

@cmd410: Literally nothing happens

https://user-images.githubusercontent.com/35804000/188282811-32428034-7290-4ed6-b72b-b36d55235e36.mp4

[cmd410]

Hmmm, dunno, i've set instance, token, user id, bot token, and channel, launched it, and it just hangs doing nothing

[hatkidchan]

If you're on latest commit, try adding this into mastoposter/__init__.py near line 18:

    async for status in source(**kwargs): # <= this is line 18
        print(f"{user=} {status.account.id=} {status.visibility=}")
        if status.account.id != user:
            continue

[hatkidchan]

Was using it on Pleroma for a while already, seems to be working more or less fine. Closing it now. In case there's any issues with Pleroma, please, create separate one