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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.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]
# This is a naive way to do this, just spawning a process per activity
# to fetch the preview. However it should be fine considering
# pagination is restricted to 40 activities at a time
defp fetch_rich_media_for_activities(activities) do
Enum.each(activities, fn activity ->
spawn(fn ->
Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
end)
end)
end
# 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
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)
# Start fetching rich media before doing anything else, so that later calls to get the cards
# only block for timeout in the worst case, as opposed to
# length(activities_with_links) * timeout
fetch_rich_media_for_activities(activities)
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(&CommonAPI.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 = CommonAPI.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 = CommonAPI.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,
%Oban.Job{scheduled_at: scheduled_at} <-
Pleroma.Workers.PurgeExpiredActivity.get_expiration(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 && CommonAPI.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] when is_list(users) ->
build_emoji_map(emoji, users, opts[:for])
{emoji, users} when is_list(users) ->
build_emoji_map(emoji, users, opts[:for])
_ ->
nil
end)
|> Enum.reject(&is_nil/1)
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()
href_preview = attachment_url["href"] |> MediaProxy.preview_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_preview,
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: %{"name" => name}} = object) when not is_nil(name) and name != "" do
url = object.data["url"] || object.data["id"]
"<p><a href=\"#{url}\">#{name}</a></p>#{object.data["content"]}"
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
defp build_emoji_map(emoji, users, current_user) do
%{
name: emoji,
count: length(users),
me: !!(current_user && current_user.ap_id in users)
}
end
end

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