akkoma/lib/pleroma/web/ostatus/ostatus.ex

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Elixir
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defmodule Pleroma.Web.OStatus do
import Ecto.Query
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import Pleroma.Web.XML
require Logger
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alias Pleroma.{Repo, User, Web, Object}
alias Pleroma.Web.ActivityPub.ActivityPub
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alias Pleroma.Web.{WebFinger, Websub}
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def feed_path(user) do
"#{user.ap_id}/feed.atom"
end
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def pubsub_path(user) do
"#{Web.base_url}/push/hub/#{user.nickname}"
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end
def salmon_path(user) do
"#{user.ap_id}/salmon"
end
def handle_incoming(xml_string) do
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doc = parse_document(xml_string)
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entries = :xmerl_xpath.string('//entry', doc)
activities = Enum.map(entries, fn (entry) ->
{:xmlObj, :string, object_type } = :xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)
case object_type do
'http://activitystrea.ms/schema/1.0/note' ->
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with {:ok, activity} <- handle_note(entry, doc), do: activity
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'http://activitystrea.ms/schema/1.0/comment' ->
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with {:ok, activity} <- handle_note(entry, doc), do: activity
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_ ->
Logger.error("Couldn't parse incoming document")
nil
end
end)
{:ok, activities}
end
# TODO
# wire up replies
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def handle_note(entry, doc \\ nil) do
content_html = string_from_xpath("/entry/content[1]", entry)
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uri = string_from_xpath("/entry/author/uri[1]", entry) || string_from_xpath("/feed/author/uri[1]", doc)
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{:ok, actor} = find_or_make_user(uri)
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context = string_from_xpath("/entry/ostatus:conversation[1]", entry) |> String.trim
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context = if String.length(context) > 0 do
context
else
ActivityPub.generate_context_id
end
to = [
"https://www.w3.org/ns/activitystreams#Public"
]
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mentions = :xmerl_xpath.string('/entry/link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]', entry)
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|> Enum.map(fn(person) -> string_from_xpath("@href", person) end)
to = to ++ mentions
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date = string_from_xpath("/entry/published", entry)
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id = string_from_xpath("/entry/id", entry)
object = %{
"id" => id,
"type" => "Note",
"to" => to,
"content" => content_html,
"published" => date,
"context" => context,
"actor" => actor.ap_id
}
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inReplyTo = string_from_xpath("/entry/thr:in-reply-to[1]/@ref", entry)
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object = if inReplyTo do
Map.put(object, "inReplyTo", inReplyTo)
else
object
end
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# TODO: Bail out sooner and use transaction.
if Object.get_by_ap_id(id) do
{:error, "duplicate activity"}
else
ActivityPub.create(to, actor, context, object, %{}, date)
end
end
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def find_or_make_user(uri) do
query = from user in User,
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where: user.local == false and fragment("? @> ?", user.info, ^%{uri: uri})
user = Repo.one(query)
if is_nil(user) do
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make_user(uri)
else
{:ok, user}
end
end
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def make_user(uri) do
with {:ok, info} <- gather_user_info(uri) do
data = %{
local: false,
name: info.name,
nickname: info.nickname <> "@" <> info.host,
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ap_id: info.uri,
info: info
}
# TODO: Make remote user changeset
# SHould enforce fqn nickname
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Repo.insert(Ecto.Changeset.change(%User{}, data))
end
end
# TODO: Just takes the first one for now.
defp make_avatar_object(author_doc) do
href = string_from_xpath("/author[1]/link[@rel=\"avatar\"]/@href", author_doc)
type = string_from_xpath("/author[1]/link[@rel=\"avatar\"]/@type", author_doc)
if href do
%{
"type" => "Image",
"url" =>
[%{
"type" => "Link",
"mediaType" => type,
"href" => href
}]
}
else
nil
end
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end
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def gather_user_info(username) do
with {:ok, webfinger_data} <- WebFinger.finger(username),
{:ok, feed_data} <- Websub.gather_feed_data(webfinger_data.topic) do
{:ok, Map.merge(webfinger_data, feed_data) |> Map.put(:fqn, username)}
else e ->
Logger.debug("Couldn't gather info for #{username}")
{:error, e}
end
end
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end