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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MastodonAPI.StatusView do
use Pleroma.Web, :view
require Pleroma.Constants
alias Pleroma.Activity
alias Pleroma.ActivityExpiration
alias Pleroma.HTML
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.UserRelationship
alias Pleroma.Web.CommonAPI
alias Pleroma.Web.CommonAPI.Utils
alias Pleroma.Web.MastodonAPI.AccountView
alias Pleroma.Web.MastodonAPI.PollView
alias Pleroma.Web.MastodonAPI.StatusView
alias Pleroma.Web.MediaProxy
import Pleroma.Web.ActivityPub.Visibility, only: [get_visibility: 1, visible_for_user?: 2]
# TODO: Add cached version.
defp get_replied_to_activities([]), do: %{}
defp get_replied_to_activities(activities) do
activities
|> Enum.map(fn
%{data: %{"type" => "Create"}} = activity ->
object = Object.normalize(activity)
object && object.data["inReplyTo"] != "" && object.data["inReplyTo"]
_ ->
nil
end)
|> Enum.filter(& &1)
|> Activity.create_by_object_ap_id_with_object()
|> Repo.all()
|> Enum.reduce(%{}, fn activity, acc ->
object = Object.normalize(activity)
if object, do: Map.put(acc, object.data["id"], activity), else: acc
end)
end
def get_user(ap_id, fake_record_fallback \\ true) do
cond do
user = User.get_cached_by_ap_id(ap_id) ->
user
user = User.get_by_guessed_nickname(ap_id) ->
user
fake_record_fallback ->
# TODO: refactor (fake records is never a good idea)
User.error_user(ap_id)
true ->
nil
end
end
defp get_context_id(%{data: %{"context_id" => context_id}}) when not is_nil(context_id),
do: context_id
defp get_context_id(%{data: %{"context" => context}}) when is_binary(context),
do: Utils.context_to_conversation_id(context)
defp get_context_id(_), do: nil
defp reblogged?(activity, user) do
object = Object.normalize(activity) || %{}
present?(user && user.ap_id in (object.data["announcements"] || []))
end
def render("index.json", opts) do
reading_user = opts[:for]
# To do: check AdminAPIControllerTest on the reasons behind nil activities in the list
activities = Enum.filter(opts.activities, & &1)
replied_to_activities = get_replied_to_activities(activities)
parent_activities =
activities
|> Enum.filter(&(&1.data["type"] == "Announce" && &1.data["object"]))
|> Enum.map(&Object.normalize(&1).data["id"])
|> Activity.create_by_object_ap_id()
|> Activity.with_preloaded_object(:left)
|> Activity.with_preloaded_bookmark(reading_user)
|> Activity.with_set_thread_muted_field(reading_user)
|> Repo.all()
relationships_opt =
cond do
Map.has_key?(opts, :relationships) ->
opts[:relationships]
is_nil(reading_user) ->
UserRelationship.view_relationships_option(nil, [])
true ->
# Note: unresolved users are filtered out
actors =
(activities ++ parent_activities)
|> Enum.map(&get_user(&1.data["actor"], false))
|> Enum.filter(& &1)
UserRelationship.view_relationships_option(reading_user, actors, subset: :source_mutes)
end
opts =
opts
|> Map.put(:replied_to_activities, replied_to_activities)
|> Map.put(:parent_activities, parent_activities)
|> Map.put(:relationships, relationships_opt)
safe_render_many(activities, StatusView, "show.json", opts)
end
def render(
"show.json",
%{activity: %{data: %{"type" => "Announce", "object" => _object}} = activity} = opts
) do
user = get_user(activity.data["actor"])
created_at = Utils.to_masto_date(activity.data["published"])
activity_object = Object.normalize(activity)
reblogged_parent_activity =
if opts[:parent_activities] do
Activity.Queries.find_by_object_ap_id(
opts[:parent_activities],
activity_object.data["id"]
)
else
Activity.create_by_object_ap_id(activity_object.data["id"])
|> Activity.with_preloaded_bookmark(opts[:for])
|> Activity.with_set_thread_muted_field(opts[:for])
|> Repo.one()
end
reblog_rendering_opts = Map.put(opts, :activity, reblogged_parent_activity)
reblogged = render("show.json", reblog_rendering_opts)
favorited = opts[:for] && opts[:for].ap_id in (activity_object.data["likes"] || [])
bookmarked = Activity.get_bookmark(reblogged_parent_activity, opts[:for]) != nil
mentions =
activity.recipients
|> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
|> Enum.filter(& &1)
|> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
%{
id: to_string(activity.id),
uri: activity_object.data["id"],
url: activity_object.data["id"],
account:
AccountView.render("show.json", %{
user: user,
for: opts[:for]
}),
in_reply_to_id: nil,
in_reply_to_account_id: nil,
reblog: reblogged,
content: reblogged[:content] || "",
created_at: created_at,
reblogs_count: 0,
replies_count: 0,
favourites_count: 0,
reblogged: reblogged?(reblogged_parent_activity, opts[:for]),
favourited: present?(favorited),
bookmarked: present?(bookmarked),
muted: false,
pinned: pinned?(activity, user),
sensitive: false,
spoiler_text: "",
visibility: get_visibility(activity),
media_attachments: reblogged[:media_attachments] || [],
mentions: mentions,
tags: reblogged[:tags] || [],
application: %{
name: "Web",
website: nil
},
language: nil,
emojis: [],
pleroma: %{
local: activity.local
}
}
end
def render("show.json", %{activity: %{data: %{"object" => _object}} = activity} = opts) do
object = Object.normalize(activity)
user = get_user(activity.data["actor"])
user_follower_address = user.follower_address
like_count = object.data["like_count"] || 0
announcement_count = object.data["announcement_count"] || 0
tags = object.data["tag"] || []
sensitive = object.data["sensitive"] || Enum.member?(tags, "nsfw")
tag_mentions =
tags
|> Enum.filter(fn tag -> is_map(tag) and tag["type"] == "Mention" end)
|> Enum.map(fn tag -> tag["href"] end)
mentions =
(object.data["to"] ++ tag_mentions)
|> Enum.uniq()
|> Enum.map(fn
Pleroma.Constants.as_public() -> nil
^user_follower_address -> nil
ap_id -> User.get_cached_by_ap_id(ap_id)
end)
|> Enum.filter(& &1)
|> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
favorited = opts[:for] && opts[:for].ap_id in (object.data["likes"] || [])
bookmarked = Activity.get_bookmark(activity, opts[:for]) != nil
client_posted_this_activity = opts[:for] && user.id == opts[:for].id
expires_at =
with true <- client_posted_this_activity,
%ActivityExpiration{scheduled_at: scheduled_at} <-
ActivityExpiration.get_by_activity_id(activity.id) do
scheduled_at
else
_ -> nil
end
thread_muted? =
cond do
is_nil(opts[:for]) -> false
is_boolean(activity.thread_muted?) -> activity.thread_muted?
true -> CommonAPI.thread_muted?(opts[:for], activity)
end
attachment_data = object.data["attachment"] || []
attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
created_at = Utils.to_masto_date(object.data["published"])
reply_to = get_reply_to(activity, opts)
reply_to_user = reply_to && get_user(reply_to.data["actor"])
content =
object
|> render_content()
content_html =
content
|> HTML.get_cached_scrubbed_html_for_activity(
User.html_filter_policy(opts[:for]),
activity,
"mastoapi:content"
)
content_plaintext =
content
|> HTML.get_cached_stripped_html_for_activity(
activity,
"mastoapi:content"
)
summary = object.data["summary"] || ""
card = render("card.json", Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity))
url =
if user.local do
Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice, activity)
else
object.data["url"] || object.data["external_url"] || object.data["id"]
end
direct_conversation_id =
with {_, nil} <- {:direct_conversation_id, opts[:direct_conversation_id]},
{_, true} <- {:include_id, opts[:with_direct_conversation_id]},
{_, %User{} = for_user} <- {:for_user, opts[:for]} do
Activity.direct_conversation_id(activity, for_user)
else
{:direct_conversation_id, participation_id} when is_integer(participation_id) ->
participation_id
_e ->
nil
end
emoji_reactions =
with %{data: %{"reactions" => emoji_reactions}} <- object do
Enum.map(emoji_reactions, fn [emoji, users] ->
%{
name: emoji,
count: length(users),
me: !!(opts[:for] && opts[:for].ap_id in users)
}
end)
else
_ -> []
end
# Status muted state (would do 1 request per status unless user mutes are preloaded)
muted =
thread_muted? ||
UserRelationship.exists?(
get_in(opts, [:relationships, :user_relationships]),
:mute,
opts[:for],
user,
fn for_user, user -> User.mutes?(for_user, user) end
)
%{
id: to_string(activity.id),
uri: object.data["id"],
url: url,
account:
AccountView.render("show.json", %{
user: user,
for: opts[:for]
}),
in_reply_to_id: reply_to && to_string(reply_to.id),
in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
reblog: nil,
card: card,
content: content_html,
text: opts[:with_source] && object.data["source"],
created_at: created_at,
reblogs_count: announcement_count,
replies_count: object.data["repliesCount"] || 0,
favourites_count: like_count,
reblogged: reblogged?(activity, opts[:for]),
favourited: present?(favorited),
bookmarked: present?(bookmarked),
muted: muted,
pinned: pinned?(activity, user),
sensitive: sensitive,
spoiler_text: summary,
visibility: get_visibility(object),
media_attachments: attachments,
poll: render(PollView, "show.json", object: object, for: opts[:for]),
mentions: mentions,
tags: build_tags(tags),
application: %{
name: "Web",
website: nil
},
language: nil,
emojis: build_emojis(object.data["emoji"]),
pleroma: %{
local: activity.local,
conversation_id: get_context_id(activity),
in_reply_to_account_acct: reply_to_user && reply_to_user.nickname,
content: %{"text/plain" => content_plaintext},
spoiler_text: %{"text/plain" => summary},
expires_at: expires_at,
direct_conversation_id: direct_conversation_id,
thread_muted: thread_muted?,
emoji_reactions: emoji_reactions,
parent_visible: visible_for_user?(reply_to, opts[:for])
}
}
end
def render("show.json", _) do
nil
end
def render("card.json", %{rich_media: rich_media, page_url: page_url}) do
page_url_data = URI.parse(page_url)
page_url_data =
if is_binary(rich_media["url"]) do
URI.merge(page_url_data, URI.parse(rich_media["url"]))
else
page_url_data
end
page_url = page_url_data |> to_string
image_url =
if is_binary(rich_media["image"]) do
URI.merge(page_url_data, URI.parse(rich_media["image"]))
|> to_string
end
%{
type: "link",
provider_name: page_url_data.host,
provider_url: page_url_data.scheme <> "://" <> page_url_data.host,
url: page_url,
image: image_url |> MediaProxy.url(),
title: rich_media["title"] || "",
description: rich_media["description"] || "",
pleroma: %{
opengraph: rich_media
}
}
end
def render("card.json", _), do: nil
def render("attachment.json", %{attachment: attachment}) do
[attachment_url | _] = attachment["url"]
media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
href = attachment_url["href"] |> MediaProxy.url()
type =
cond do
String.contains?(media_type, "image") -> "image"
String.contains?(media_type, "video") -> "video"
String.contains?(media_type, "audio") -> "audio"
true -> "unknown"
end
<<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
%{
id: to_string(attachment["id"] || hash_id),
url: href,
remote_url: href,
preview_url: href,
text_url: href,
type: type,
description: attachment["name"],
pleroma: %{mime_type: media_type}
}
end
def render("context.json", %{activity: activity, activities: activities, user: user}) do
%{ancestors: ancestors, descendants: descendants} =
activities
|> Enum.reverse()
|> Enum.group_by(fn %{id: id} -> if id < activity.id, do: :ancestors, else: :descendants end)
|> Map.put_new(:ancestors, [])
|> Map.put_new(:descendants, [])
%{
ancestors: render("index.json", for: user, activities: ancestors, as: :activity),
descendants: render("index.json", for: user, activities: descendants, as: :activity)
}
end
def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
object = Object.normalize(activity)
with nil <- replied_to_activities[object.data["inReplyTo"]] do
# If user didn't participate in the thread
Activity.get_in_reply_to_activity(activity)
end
end
def get_reply_to(%{data: %{"object" => _object}} = activity, _) do
object = Object.normalize(activity)
if object.data["inReplyTo"] && object.data["inReplyTo"] != "" do
Activity.get_create_by_object_ap_id(object.data["inReplyTo"])
else
nil
end
end
def render_content(%{data: %{"type" => object_type}} = object)
when object_type in ["Video", "Event", "Audio"] do
with name when not is_nil(name) and name != "" <- object.data["name"] do
"<p><a href=\"#{object.data["id"]}\">#{name}</a></p>#{object.data["content"]}"
else
_ -> object.data["content"] || ""
end
end
def render_content(%{data: %{"type" => object_type}} = object)
when object_type in ["Article", "Page"] do
with summary when not is_nil(summary) and summary != "" <- object.data["name"],
url when is_bitstring(url) <- object.data["url"] do
"<p><a href=\"#{url}\">#{summary}</a></p>#{object.data["content"]}"
else
_ -> object.data["content"] || ""
end
end
def render_content(object), do: object.data["content"] || ""
@doc """
Builds a dictionary tags.
## Examples
iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
[{"name": "fediverse", "url": "/tag/fediverse"},
{"name": "nextcloud", "url": "/tag/nextcloud"}]
"""
@spec build_tags(list(any())) :: list(map())
def build_tags(object_tags) when is_list(object_tags) do
object_tags
|> Enum.filter(&is_binary/1)
|> Enum.map(&%{name: &1, url: "/tag/#{URI.encode(&1)}"})
end
def build_tags(_), do: []
@doc """
Builds list emojis.
Arguments: `nil` or list tuple of name and url.
Returns list emojis.
## Examples
iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
[%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
"""
@spec build_emojis(nil | list(tuple())) :: list(map())
def build_emojis(nil), do: []
def build_emojis(emojis) do
emojis
|> Enum.map(fn {name, url} ->
name = HTML.strip_tags(name)
url =
url
|> HTML.strip_tags()
|> MediaProxy.url()
%{shortcode: name, url: url, static_url: url, visible_in_picker: false}
end)
end
defp present?(nil), do: false
defp present?(false), do: false
defp present?(_), do: true
defp pinned?(%Activity{id: id}, %User{pinned_activities: pinned_activities}),
do: id in pinned_activities
end

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