note_handler.ex (5616B)
1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
4
5 defmodule Pleroma.Web.OStatus.NoteHandler do
6 require Logger
7 require Pleroma.Constants
8
9 alias Pleroma.Activity
10 alias Pleroma.Object
11 alias Pleroma.Web.ActivityPub.ActivityPub
12 alias Pleroma.Web.ActivityPub.Utils
13 alias Pleroma.Web.CommonAPI
14 alias Pleroma.Web.Federator
15 alias Pleroma.Web.OStatus
16 alias Pleroma.Web.XML
17
18 @doc """
19 Get the context for this note. Uses this:
20 1. The context of the parent activity
21 2. The conversation reference in the ostatus xml
22 3. A newly generated context id.
23 """
24 def get_context(entry, in_reply_to) do
25 context =
26 (XML.string_from_xpath("//ostatus:conversation[1]", entry) ||
27 XML.string_from_xpath("//ostatus:conversation[1]/@ref", entry) || "")
28 |> String.trim()
29
30 with %{data: %{"context" => context}} <- Object.get_cached_by_ap_id(in_reply_to) do
31 context
32 else
33 _e ->
34 if String.length(context) > 0 do
35 context
36 else
37 Utils.generate_context_id()
38 end
39 end
40 end
41
42 def get_people_mentions(entry) do
43 :xmerl_xpath.string(
44 '//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/person"]',
45 entry
46 )
47 |> Enum.map(fn person -> XML.string_from_xpath("@href", person) end)
48 end
49
50 def get_collection_mentions(entry) do
51 transmogrify = fn
52 "http://activityschema.org/collection/public" ->
53 Pleroma.Constants.as_public()
54
55 group ->
56 group
57 end
58
59 :xmerl_xpath.string(
60 '//link[@rel="mentioned" and @ostatus:object-type="http://activitystrea.ms/schema/1.0/collection"]',
61 entry
62 )
63 |> Enum.map(fn collection -> XML.string_from_xpath("@href", collection) |> transmogrify.() end)
64 end
65
66 def get_mentions(entry) do
67 (get_people_mentions(entry) ++ get_collection_mentions(entry))
68 |> Enum.filter(& &1)
69 end
70
71 def get_emoji(entry) do
72 try do
73 :xmerl_xpath.string('//link[@rel="emoji"]', entry)
74 |> Enum.reduce(%{}, fn emoji, acc ->
75 Map.put(acc, XML.string_from_xpath("@name", emoji), XML.string_from_xpath("@href", emoji))
76 end)
77 rescue
78 _e -> nil
79 end
80 end
81
82 def make_to_list(actor, mentions) do
83 [
84 actor.follower_address
85 ] ++ mentions
86 end
87
88 def add_external_url(note, entry) do
89 url = XML.string_from_xpath("//link[@rel='alternate' and @type='text/html']/@href", entry)
90 Map.put(note, "external_url", url)
91 end
92
93 def fetch_replied_to_activity(entry, in_reply_to, options \\ []) do
94 with %Activity{} = activity <- Activity.get_create_by_object_ap_id(in_reply_to) do
95 activity
96 else
97 _e ->
98 with true <- Federator.allowed_incoming_reply_depth?(options[:depth]),
99 in_reply_to_href when not is_nil(in_reply_to_href) <-
100 XML.string_from_xpath("//thr:in-reply-to[1]/@href", entry),
101 {:ok, [activity | _]} <- OStatus.fetch_activity_from_url(in_reply_to_href, options) do
102 activity
103 else
104 _e -> nil
105 end
106 end
107 end
108
109 # TODO: Clean this up a bit.
110 def handle_note(entry, doc \\ nil, options \\ []) do
111 with id <- XML.string_from_xpath("//id", entry),
112 activity when is_nil(activity) <- Activity.get_create_by_object_ap_id_with_object(id),
113 [author] <- :xmerl_xpath.string('//author[1]', doc),
114 {:ok, actor} <- OStatus.find_make_or_update_actor(author),
115 content_html <- OStatus.get_content(entry),
116 cw <- OStatus.get_cw(entry),
117 in_reply_to <- XML.string_from_xpath("//thr:in-reply-to[1]/@ref", entry),
118 options <- Keyword.put(options, :depth, (options[:depth] || 0) + 1),
119 in_reply_to_activity <- fetch_replied_to_activity(entry, in_reply_to, options),
120 in_reply_to_object <-
121 (in_reply_to_activity && Object.normalize(in_reply_to_activity)) || nil,
122 in_reply_to <- (in_reply_to_object && in_reply_to_object.data["id"]) || in_reply_to,
123 attachments <- OStatus.get_attachments(entry),
124 context <- get_context(entry, in_reply_to),
125 tags <- OStatus.get_tags(entry),
126 mentions <- get_mentions(entry),
127 to <- make_to_list(actor, mentions),
128 date <- XML.string_from_xpath("//published", entry),
129 unlisted <- XML.string_from_xpath("//mastodon:scope", entry) == "unlisted",
130 cc <- if(unlisted, do: [Pleroma.Constants.as_public()], else: []),
131 note <-
132 CommonAPI.Utils.make_note_data(
133 actor.ap_id,
134 to,
135 context,
136 content_html,
137 attachments,
138 in_reply_to_activity,
139 [],
140 cw
141 ),
142 note <- note |> Map.put("id", id) |> Map.put("tag", tags),
143 note <- note |> Map.put("published", date),
144 note <- note |> Map.put("emoji", get_emoji(entry)),
145 note <- add_external_url(note, entry),
146 note <- note |> Map.put("cc", cc),
147 # TODO: Handle this case in make_note_data
148 note <-
149 if(
150 in_reply_to && !in_reply_to_activity,
151 do: note |> Map.put("inReplyTo", in_reply_to),
152 else: note
153 ) do
154 ActivityPub.create(%{
155 to: to,
156 actor: actor,
157 context: context,
158 object: note,
159 published: date,
160 local: false,
161 additional: %{"cc" => cc}
162 })
163 else
164 %Activity{} = activity -> {:ok, activity}
165 e -> {:error, e}
166 end
167 end
168 end