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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.MastodonAPI.StatusView do
   6   use Pleroma.Web, :view
   7
   8   require Pleroma.Constants
   9
  10   alias Pleroma.Activity
  11   alias Pleroma.ActivityExpiration
  12   alias Pleroma.HTML
  13   alias Pleroma.Object
  14   alias Pleroma.Repo
  15   alias Pleroma.User
  16   alias Pleroma.Web.CommonAPI
  17   alias Pleroma.Web.CommonAPI.Utils
  18   alias Pleroma.Web.MastodonAPI.AccountView
  19   alias Pleroma.Web.MastodonAPI.PollView
  20   alias Pleroma.Web.MastodonAPI.StatusView
  21   alias Pleroma.Web.MediaProxy
  22
  23   import Pleroma.Web.ActivityPub.Visibility, only: [get_visibility: 1]
  24
  25   # TODO: Add cached version.
  26   defp get_replied_to_activities([]), do: %{}
  27
  28   defp get_replied_to_activities(activities) do
  29     activities
  30     |> Enum.map(fn
  31       %{data: %{"type" => "Create"}} = activity ->
  32         object = Object.normalize(activity)
  33         object && object.data["inReplyTo"] != "" && object.data["inReplyTo"]
  34
  35       _ ->
  36         nil
  37     end)
  38     |> Enum.filter(& &1)
  39     |> Activity.create_by_object_ap_id_with_object()
  40     |> Repo.all()
  41     |> Enum.reduce(%{}, fn activity, acc ->
  42       object = Object.normalize(activity)
  43       if object, do: Map.put(acc, object.data["id"], activity), else: acc
  44     end)
  45   end
  46
  47   defp get_user(ap_id) do
  48     cond do
  49       user = User.get_cached_by_ap_id(ap_id) ->
  50         user
  51
  52       user = User.get_by_guessed_nickname(ap_id) ->
  53         user
  54
  55       true ->
  56         User.error_user(ap_id)
  57     end
  58   end
  59
  60   defp get_context_id(%{data: %{"context_id" => context_id}}) when not is_nil(context_id),
  61     do: context_id
  62
  63   defp get_context_id(%{data: %{"context" => context}}) when is_binary(context),
  64     do: Utils.context_to_conversation_id(context)
  65
  66   defp get_context_id(_), do: nil
  67
  68   defp reblogged?(activity, user) do
  69     object = Object.normalize(activity) || %{}
  70     present?(user && user.ap_id in (object.data["announcements"] || []))
  71   end
  72
  73   def render("index.json", opts) do
  74     replied_to_activities = get_replied_to_activities(opts.activities)
  75     opts = Map.put(opts, :replied_to_activities, replied_to_activities)
  76
  77     safe_render_many(opts.activities, StatusView, "show.json", opts)
  78   end
  79
  80   def render(
  81         "show.json",
  82         %{activity: %{data: %{"type" => "Announce", "object" => _object}} = activity} = opts
  83       ) do
  84     user = get_user(activity.data["actor"])
  85     created_at = Utils.to_masto_date(activity.data["published"])
  86     activity_object = Object.normalize(activity)
  87
  88     reblogged_activity =
  89       Activity.create_by_object_ap_id(activity_object.data["id"])
  90       |> Activity.with_preloaded_bookmark(opts[:for])
  91       |> Activity.with_set_thread_muted_field(opts[:for])
  92       |> Repo.one()
  93
  94     reblogged = render("show.json", Map.put(opts, :activity, reblogged_activity))
  95
  96     favorited = opts[:for] && opts[:for].ap_id in (activity_object.data["likes"] || [])
  97
  98     bookmarked = Activity.get_bookmark(reblogged_activity, opts[:for]) != nil
  99
 100     mentions =
 101       activity.recipients
 102       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
 103       |> Enum.filter(& &1)
 104       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 105
 106     %{
 107       id: to_string(activity.id),
 108       uri: activity_object.data["id"],
 109       url: activity_object.data["id"],
 110       account: AccountView.render("show.json", %{user: user, for: opts[:for]}),
 111       in_reply_to_id: nil,
 112       in_reply_to_account_id: nil,
 113       reblog: reblogged,
 114       content: reblogged[:content] || "",
 115       created_at: created_at,
 116       reblogs_count: 0,
 117       replies_count: 0,
 118       favourites_count: 0,
 119       reblogged: reblogged?(reblogged_activity, opts[:for]),
 120       favourited: present?(favorited),
 121       bookmarked: present?(bookmarked),
 122       muted: false,
 123       pinned: pinned?(activity, user),
 124       sensitive: false,
 125       spoiler_text: "",
 126       visibility: get_visibility(activity),
 127       media_attachments: reblogged[:media_attachments] || [],
 128       mentions: mentions,
 129       tags: reblogged[:tags] || [],
 130       application: %{
 131         name: "Web",
 132         website: nil
 133       },
 134       language: nil,
 135       emojis: [],
 136       pleroma: %{
 137         local: activity.local
 138       }
 139     }
 140   end
 141
 142   def render("show.json", %{activity: %{data: %{"object" => _object}} = activity} = opts) do
 143     object = Object.normalize(activity)
 144
 145     user = get_user(activity.data["actor"])
 146     user_follower_address = user.follower_address
 147
 148     like_count = object.data["like_count"] || 0
 149     announcement_count = object.data["announcement_count"] || 0
 150
 151     tags = object.data["tag"] || []
 152     sensitive = object.data["sensitive"] || Enum.member?(tags, "nsfw")
 153
 154     tag_mentions =
 155       tags
 156       |> Enum.filter(fn tag -> is_map(tag) and tag["type"] == "Mention" end)
 157       |> Enum.map(fn tag -> tag["href"] end)
 158
 159     mentions =
 160       (object.data["to"] ++ tag_mentions)
 161       |> Enum.uniq()
 162       |> Enum.map(fn
 163         Pleroma.Constants.as_public() -> nil
 164         ^user_follower_address -> nil
 165         ap_id -> User.get_cached_by_ap_id(ap_id)
 166       end)
 167       |> Enum.filter(& &1)
 168       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 169
 170     favorited = opts[:for] && opts[:for].ap_id in (object.data["likes"] || [])
 171
 172     bookmarked = Activity.get_bookmark(activity, opts[:for]) != nil
 173
 174     client_posted_this_activity = opts[:for] && user.id == opts[:for].id
 175
 176     expires_at =
 177       with true <- client_posted_this_activity,
 178            %ActivityExpiration{scheduled_at: scheduled_at} <-
 179              ActivityExpiration.get_by_activity_id(activity.id) do
 180         scheduled_at
 181       else
 182         _ -> nil
 183       end
 184
 185     thread_muted? =
 186       case activity.thread_muted? do
 187         thread_muted? when is_boolean(thread_muted?) -> thread_muted?
 188         nil -> (opts[:for] && CommonAPI.thread_muted?(opts[:for], activity)) || false
 189       end
 190
 191     attachment_data = object.data["attachment"] || []
 192     attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
 193
 194     created_at = Utils.to_masto_date(object.data["published"])
 195
 196     reply_to = get_reply_to(activity, opts)
 197
 198     reply_to_user = reply_to && get_user(reply_to.data["actor"])
 199
 200     content =
 201       object
 202       |> render_content()
 203
 204     content_html =
 205       content
 206       |> HTML.get_cached_scrubbed_html_for_activity(
 207         User.html_filter_policy(opts[:for]),
 208         activity,
 209         "mastoapi:content"
 210       )
 211
 212     content_plaintext =
 213       content
 214       |> HTML.get_cached_stripped_html_for_activity(
 215         activity,
 216         "mastoapi:content"
 217       )
 218
 219     summary = object.data["summary"] || ""
 220
 221     card = render("card.json", Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity))
 222
 223     url =
 224       if user.local do
 225         Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice, activity)
 226       else
 227         object.data["url"] || object.data["external_url"] || object.data["id"]
 228       end
 229
 230     direct_conversation_id =
 231       with {_, nil} <- {:direct_conversation_id, opts[:direct_conversation_id]},
 232            {_, true} <- {:include_id, opts[:with_direct_conversation_id]},
 233            {_, %User{} = for_user} <- {:for_user, opts[:for]} do
 234         Activity.direct_conversation_id(activity, for_user)
 235       else
 236         {:direct_conversation_id, participation_id} when is_integer(participation_id) ->
 237           participation_id
 238
 239         _e ->
 240           nil
 241       end
 242
 243     emoji_reactions =
 244       with %{data: %{"reactions" => emoji_reactions}} <- object do
 245         Enum.map(emoji_reactions, fn [emoji, users] ->
 246           %{
 247             name: emoji,
 248             count: length(users),
 249             me: !!(opts[:for] && opts[:for].ap_id in users)
 250           }
 251         end)
 252       else
 253         _ -> []
 254       end
 255
 256     %{
 257       id: to_string(activity.id),
 258       uri: object.data["id"],
 259       url: url,
 260       account: AccountView.render("show.json", %{user: user, for: opts[:for]}),
 261       in_reply_to_id: reply_to && to_string(reply_to.id),
 262       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
 263       reblog: nil,
 264       card: card,
 265       content: content_html,
 266       created_at: created_at,
 267       reblogs_count: announcement_count,
 268       replies_count: object.data["repliesCount"] || 0,
 269       favourites_count: like_count,
 270       reblogged: reblogged?(activity, opts[:for]),
 271       favourited: present?(favorited),
 272       bookmarked: present?(bookmarked),
 273       muted: thread_muted? || User.mutes?(opts[:for], user),
 274       pinned: pinned?(activity, user),
 275       sensitive: sensitive,
 276       spoiler_text: summary,
 277       visibility: get_visibility(object),
 278       media_attachments: attachments,
 279       poll: render(PollView, "show.json", object: object, for: opts[:for]),
 280       mentions: mentions,
 281       tags: build_tags(tags),
 282       application: %{
 283         name: "Web",
 284         website: nil
 285       },
 286       language: nil,
 287       emojis: build_emojis(object.data["emoji"]),
 288       pleroma: %{
 289         local: activity.local,
 290         conversation_id: get_context_id(activity),
 291         in_reply_to_account_acct: reply_to_user && reply_to_user.nickname,
 292         content: %{"text/plain" => content_plaintext},
 293         spoiler_text: %{"text/plain" => summary},
 294         expires_at: expires_at,
 295         direct_conversation_id: direct_conversation_id,
 296         thread_muted: thread_muted?,
 297         emoji_reactions: emoji_reactions
 298       }
 299     }
 300   end
 301
 302   def render("show.json", _) do
 303     nil
 304   end
 305
 306   def render("card.json", %{rich_media: rich_media, page_url: page_url}) do
 307     page_url_data = URI.parse(page_url)
 308
 309     page_url_data =
 310       if rich_media[:url] != nil do
 311         URI.merge(page_url_data, URI.parse(rich_media[:url]))
 312       else
 313         page_url_data
 314       end
 315
 316     page_url = page_url_data |> to_string
 317
 318     image_url =
 319       if rich_media[:image] != nil do
 320         URI.merge(page_url_data, URI.parse(rich_media[:image]))
 321         |> to_string
 322       else
 323         nil
 324       end
 325
 326     %{
 327       type: "link",
 328       provider_name: page_url_data.host,
 329       provider_url: page_url_data.scheme <> "://" <> page_url_data.host,
 330       url: page_url,
 331       image: image_url |> MediaProxy.url(),
 332       title: rich_media[:title] || "",
 333       description: rich_media[:description] || "",
 334       pleroma: %{
 335         opengraph: rich_media
 336       }
 337     }
 338   end
 339
 340   def render("card.json", _), do: nil
 341
 342   def render("attachment.json", %{attachment: attachment}) do
 343     [attachment_url | _] = attachment["url"]
 344     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
 345     href = attachment_url["href"] |> MediaProxy.url()
 346
 347     type =
 348       cond do
 349         String.contains?(media_type, "image") -> "image"
 350         String.contains?(media_type, "video") -> "video"
 351         String.contains?(media_type, "audio") -> "audio"
 352         true -> "unknown"
 353       end
 354
 355     <<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
 356
 357     %{
 358       id: to_string(attachment["id"] || hash_id),
 359       url: href,
 360       remote_url: href,
 361       preview_url: href,
 362       text_url: href,
 363       type: type,
 364       description: attachment["name"],
 365       pleroma: %{mime_type: media_type}
 366     }
 367   end
 368
 369   def render("listen.json", %{activity: %Activity{data: %{"type" => "Listen"}} = activity} = opts) do
 370     object = Object.normalize(activity)
 371
 372     user = get_user(activity.data["actor"])
 373     created_at = Utils.to_masto_date(activity.data["published"])
 374
 375     %{
 376       id: activity.id,
 377       account: AccountView.render("show.json", %{user: user, for: opts[:for]}),
 378       created_at: created_at,
 379       title: object.data["title"] |> HTML.strip_tags(),
 380       artist: object.data["artist"] |> HTML.strip_tags(),
 381       album: object.data["album"] |> HTML.strip_tags(),
 382       length: object.data["length"]
 383     }
 384   end
 385
 386   def render("listens.json", opts) do
 387     safe_render_many(opts.activities, StatusView, "listen.json", opts)
 388   end
 389
 390   def render("context.json", %{activity: activity, activities: activities, user: user}) do
 391     %{ancestors: ancestors, descendants: descendants} =
 392       activities
 393       |> Enum.reverse()
 394       |> Enum.group_by(fn %{id: id} -> if id < activity.id, do: :ancestors, else: :descendants end)
 395       |> Map.put_new(:ancestors, [])
 396       |> Map.put_new(:descendants, [])
 397
 398     %{
 399       ancestors: render("index.json", for: user, activities: ancestors, as: :activity),
 400       descendants: render("index.json", for: user, activities: descendants, as: :activity)
 401     }
 402   end
 403
 404   def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
 405     object = Object.normalize(activity)
 406
 407     with nil <- replied_to_activities[object.data["inReplyTo"]] do
 408       # If user didn't participate in the thread
 409       Activity.get_in_reply_to_activity(activity)
 410     end
 411   end
 412
 413   def get_reply_to(%{data: %{"object" => _object}} = activity, _) do
 414     object = Object.normalize(activity)
 415
 416     if object.data["inReplyTo"] && object.data["inReplyTo"] != "" do
 417       Activity.get_create_by_object_ap_id(object.data["inReplyTo"])
 418     else
 419       nil
 420     end
 421   end
 422
 423   def render_content(%{data: %{"type" => object_type}} = object)
 424       when object_type in ["Video", "Event"] do
 425     with name when not is_nil(name) and name != "" <- object.data["name"] do
 426       "<p><a href=\"#{object.data["id"]}\">#{name}</a></p>#{object.data["content"]}"
 427     else
 428       _ -> object.data["content"] || ""
 429     end
 430   end
 431
 432   def render_content(%{data: %{"type" => object_type}} = object)
 433       when object_type in ["Article", "Page"] do
 434     with summary when not is_nil(summary) and summary != "" <- object.data["name"],
 435          url when is_bitstring(url) <- object.data["url"] do
 436       "<p><a href=\"#{url}\">#{summary}</a></p>#{object.data["content"]}"
 437     else
 438       _ -> object.data["content"] || ""
 439     end
 440   end
 441
 442   def render_content(object), do: object.data["content"] || ""
 443
 444   @doc """
 445   Builds a dictionary tags.
 446
 447   ## Examples
 448
 449   iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
 450   [{"name": "fediverse", "url": "/tag/fediverse"},
 451    {"name": "nextcloud", "url": "/tag/nextcloud"}]
 452
 453   """
 454   @spec build_tags(list(any())) :: list(map())
 455   def build_tags(object_tags) when is_list(object_tags) do
 456     object_tags = for tag when is_binary(tag) <- object_tags, do: tag
 457
 458     Enum.reduce(object_tags, [], fn tag, tags ->
 459       tags ++ [%{name: tag, url: "/tag/#{URI.encode(tag)}"}]
 460     end)
 461   end
 462
 463   def build_tags(_), do: []
 464
 465   @doc """
 466   Builds list emojis.
 467
 468   Arguments: `nil` or list tuple of name and url.
 469
 470   Returns list emojis.
 471
 472   ## Examples
 473
 474   iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
 475   [%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
 476
 477   """
 478   @spec build_emojis(nil | list(tuple())) :: list(map())
 479   def build_emojis(nil), do: []
 480
 481   def build_emojis(emojis) do
 482     emojis
 483     |> Enum.map(fn {name, url} ->
 484       name = HTML.strip_tags(name)
 485
 486       url =
 487         url
 488         |> HTML.strip_tags()
 489         |> MediaProxy.url()
 490
 491       %{shortcode: name, url: url, static_url: url, visible_in_picker: false}
 492     end)
 493   end
 494
 495   defp present?(nil), do: false
 496   defp present?(false), do: false
 497   defp present?(_), do: true
 498
 499   defp pinned?(%Activity{id: id}, %User{pinned_activities: pinned_activities}),
 500     do: id in pinned_activities
 501 end