Pleroma/lib/pleroma/web/ostatus/handlers/note_handler.ex

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defmodule Pleroma.Web.OStatus.NoteHandler do
require Logger
alias Pleroma.Web.{XML, OStatus}
alias Pleroma.{Object, User, Activity}
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.TwitterAPI
def fetch_replied_to_activity(entry, inReplyTo) do
if inReplyTo && !Object.get_cached_by_ap_id(inReplyTo) do
inReplyToHref = XML.string_from_xpath("//thr:in-reply-to[1]/@href", entry)
if inReplyToHref do
OStatus.fetch_activity_from_html_url(inReplyToHref)
else
Logger.debug("Couldn't find a href link to #{inReplyTo}")
end
end
end
@doc """
Get the context for this note. Uses this:
1. The context of the parent activity
2. The conversation reference in the ostatus xml
3. A newly generated context id.
"""
def get_context(entry, inReplyTo) do
context = (XML.string_from_xpath("//ostatus:conversation[1]", entry) || "") |> String.trim
with %{data: %{"context" => context}} <- Object.get_cached_by_ap_id(inReplyTo) do
context
else _e ->
if String.length(context) > 0 do
context
else
Utils.generate_context_id
end
end
end
def get_mentions(entry) do
:xmerl_xpath.string('//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]', entry)
|> Enum.map(fn(person) -> XML.string_from_xpath("@href", person) end)
end
def make_to_list(actor, mentions) do
[
"https://www.w3.org/ns/activitystreams#Public",
User.ap_followers(actor)
] ++ mentions
end
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def add_external_url(note, entry) do
url = XML.string_from_xpath("//link[@rel='alternate' and @type='text/html']/@href", entry)
Map.put(note, "external_url", url)
end
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def handle_note(entry, doc \\ nil) do
with id <- XML.string_from_xpath("//id", entry),
activity when is_nil(activity) <- Activity.get_create_activity_by_object_ap_id(id),
[author] <- :xmerl_xpath.string('//author[1]', doc),
{:ok, actor} <- OStatus.find_make_or_update_user(author),
content_html <- OStatus.get_content(entry),
inReplyTo <- XML.string_from_xpath("//thr:in-reply-to[1]/@ref", entry),
_inReplyToActivity <- fetch_replied_to_activity(entry, inReplyTo),
inReplyToActivity <- Activity.get_create_activity_by_object_ap_id(inReplyTo),
attachments <- OStatus.get_attachments(entry),
context <- get_context(entry, inReplyTo),
tags <- OStatus.get_tags(entry),
mentions <- get_mentions(entry),
to <- make_to_list(actor, mentions),
date <- XML.string_from_xpath("//published", entry),
note <- TwitterAPI.Utils.make_note_data(actor.ap_id, to, context, content_html, attachments, inReplyToActivity, []),
note <- note |> Map.put("id", id) |> Map.put("tag", tags),
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note <- note |> Map.put("published", date),
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note <- add_external_url(note, entry),
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# TODO: Handle this case in make_note_data
note <- (if inReplyTo && !inReplyToActivity, do: note |> Map.put("inReplyTo", inReplyTo), else: note)
do
ActivityPub.create(to, actor, context, note, %{}, date, false)
else
%Activity{} = activity -> {:ok, activity}
e -> {:error, e}
end
end
end