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   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.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            expiration when not is_nil(expiration) <-
 179              ActivityExpiration.get_by_activity_id(activity.id) do
 180         expiration.scheduled_at
 181       end
 182
 183     thread_muted? =
 184       case activity.thread_muted? do
 185         thread_muted? when is_boolean(thread_muted?) -> thread_muted?
 186         nil -> (opts[:for] && CommonAPI.thread_muted?(opts[:for], activity)) || false
 187       end
 188
 189     attachment_data = object.data["attachment"] || []
 190     attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
 191
 192     created_at = Utils.to_masto_date(object.data["published"])
 193
 194     reply_to = get_reply_to(activity, opts)
 195
 196     reply_to_user = reply_to && get_user(reply_to.data["actor"])
 197
 198     content =
 199       object
 200       |> render_content()
 201
 202     content_html =
 203       content
 204       |> HTML.get_cached_scrubbed_html_for_activity(
 205         User.html_filter_policy(opts[:for]),
 206         activity,
 207         "mastoapi:content"
 208       )
 209
 210     content_plaintext =
 211       content
 212       |> HTML.get_cached_stripped_html_for_activity(
 213         activity,
 214         "mastoapi:content"
 215       )
 216
 217     summary = object.data["summary"] || ""
 218
 219     card = render("card.json", Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity))
 220
 221     url =
 222       if user.local do
 223         Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice, activity)
 224       else
 225         object.data["url"] || object.data["external_url"] || object.data["id"]
 226       end
 227
 228     direct_conversation_id =
 229       with {_, nil} <- {:direct_conversation_id, opts[:direct_conversation_id]},
 230            {_, true} <- {:include_id, opts[:with_direct_conversation_id]},
 231            {_, %User{} = for_user} <- {:for_user, opts[:for]} do
 232         Activity.direct_conversation_id(activity, for_user)
 233       else
 234         {:direct_conversation_id, participation_id} when is_integer(participation_id) ->
 235           participation_id
 236
 237         _e ->
 238           nil
 239       end
 240
 241     emoji_reactions =
 242       with %{data: %{"reactions" => emoji_reactions}} <- object do
 243         Enum.map(emoji_reactions, fn [emoji, users] ->
 244           %{
 245             name: emoji,
 246             count: length(users),
 247             me: !!(opts[:for] && opts[:for].ap_id in users)
 248           }
 249         end)
 250       else
 251         _ -> []
 252       end
 253
 254     %{
 255       id: to_string(activity.id),
 256       uri: object.data["id"],
 257       url: url,
 258       account: AccountView.render("show.json", %{user: user, for: opts[:for]}),
 259       in_reply_to_id: reply_to && to_string(reply_to.id),
 260       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
 261       reblog: nil,
 262       card: card,
 263       content: content_html,
 264       created_at: created_at,
 265       reblogs_count: announcement_count,
 266       replies_count: object.data["repliesCount"] || 0,
 267       favourites_count: like_count,
 268       reblogged: reblogged?(activity, opts[:for]),
 269       favourited: present?(favorited),
 270       bookmarked: present?(bookmarked),
 271       muted: thread_muted? || User.mutes?(opts[:for], user),
 272       pinned: pinned?(activity, user),
 273       sensitive: sensitive,
 274       spoiler_text: summary,
 275       visibility: get_visibility(object),
 276       media_attachments: attachments,
 277       poll: render(PollView, "show.json", object: object, for: opts[:for]),
 278       mentions: mentions,
 279       tags: build_tags(tags),
 280       application: %{
 281         name: "Web",
 282         website: nil
 283       },
 284       language: nil,
 285       emojis: build_emojis(object.data["emoji"]),
 286       pleroma: %{
 287         local: activity.local,
 288         conversation_id: get_context_id(activity),
 289         in_reply_to_account_acct: reply_to_user && reply_to_user.nickname,
 290         content: %{"text/plain" => content_plaintext},
 291         spoiler_text: %{"text/plain" => summary},
 292         expires_at: expires_at,
 293         direct_conversation_id: direct_conversation_id,
 294         thread_muted: thread_muted?,
 295         emoji_reactions: emoji_reactions
 296       }
 297     }
 298   end
 299
 300   def render("show.json", _) do
 301     nil
 302   end
 303
 304   def render("card.json", %{rich_media: rich_media, page_url: page_url}) do
 305     page_url_data = URI.parse(page_url)
 306
 307     page_url_data =
 308       if rich_media[:url] != nil do
 309         URI.merge(page_url_data, URI.parse(rich_media[:url]))
 310       else
 311         page_url_data
 312       end
 313
 314     page_url = page_url_data |> to_string
 315
 316     image_url =
 317       if rich_media[:image] != nil do
 318         URI.merge(page_url_data, URI.parse(rich_media[:image]))
 319         |> to_string
 320       else
 321         nil
 322       end
 323
 324     %{
 325       type: "link",
 326       provider_name: page_url_data.host,
 327       provider_url: page_url_data.scheme <> "://" <> page_url_data.host,
 328       url: page_url,
 329       image: image_url |> MediaProxy.url(),
 330       title: rich_media[:title] || "",
 331       description: rich_media[:description] || "",
 332       pleroma: %{
 333         opengraph: rich_media
 334       }
 335     }
 336   end
 337
 338   def render("card.json", _), do: nil
 339
 340   def render("attachment.json", %{attachment: attachment}) do
 341     [attachment_url | _] = attachment["url"]
 342     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
 343     href = attachment_url["href"] |> MediaProxy.url()
 344
 345     type =
 346       cond do
 347         String.contains?(media_type, "image") -> "image"
 348         String.contains?(media_type, "video") -> "video"
 349         String.contains?(media_type, "audio") -> "audio"
 350         true -> "unknown"
 351       end
 352
 353     <<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
 354
 355     %{
 356       id: to_string(attachment["id"] || hash_id),
 357       url: href,
 358       remote_url: href,
 359       preview_url: href,
 360       text_url: href,
 361       type: type,
 362       description: attachment["name"],
 363       pleroma: %{mime_type: media_type}
 364     }
 365   end
 366
 367   def render("listen.json", %{activity: %Activity{data: %{"type" => "Listen"}} = activity} = opts) do
 368     object = Object.normalize(activity)
 369
 370     user = get_user(activity.data["actor"])
 371     created_at = Utils.to_masto_date(activity.data["published"])
 372
 373     %{
 374       id: activity.id,
 375       account: AccountView.render("show.json", %{user: user, for: opts[:for]}),
 376       created_at: created_at,
 377       title: object.data["title"] |> HTML.strip_tags(),
 378       artist: object.data["artist"] |> HTML.strip_tags(),
 379       album: object.data["album"] |> HTML.strip_tags(),
 380       length: object.data["length"]
 381     }
 382   end
 383
 384   def render("listens.json", opts) do
 385     safe_render_many(opts.activities, StatusView, "listen.json", opts)
 386   end
 387
 388   def render("context.json", %{activity: activity, activities: activities, user: user}) do
 389     %{ancestors: ancestors, descendants: descendants} =
 390       activities
 391       |> Enum.reverse()
 392       |> Enum.group_by(fn %{id: id} -> if id < activity.id, do: :ancestors, else: :descendants end)
 393       |> Map.put_new(:ancestors, [])
 394       |> Map.put_new(:descendants, [])
 395
 396     %{
 397       ancestors: render("index.json", for: user, activities: ancestors, as: :activity),
 398       descendants: render("index.json", for: user, activities: descendants, as: :activity)
 399     }
 400   end
 401
 402   def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
 403     object = Object.normalize(activity)
 404
 405     with nil <- replied_to_activities[object.data["inReplyTo"]] do
 406       # If user didn't participate in the thread
 407       Activity.get_in_reply_to_activity(activity)
 408     end
 409   end
 410
 411   def get_reply_to(%{data: %{"object" => _object}} = activity, _) do
 412     object = Object.normalize(activity)
 413
 414     if object.data["inReplyTo"] && object.data["inReplyTo"] != "" do
 415       Activity.get_create_by_object_ap_id(object.data["inReplyTo"])
 416     else
 417       nil
 418     end
 419   end
 420
 421   def render_content(%{data: %{"type" => object_type}} = object)
 422       when object_type in ["Video", "Event"] do
 423     with name when not is_nil(name) and name != "" <- object.data["name"] do
 424       "<p><a href=\"#{object.data["id"]}\">#{name}</a></p>#{object.data["content"]}"
 425     else
 426       _ -> object.data["content"] || ""
 427     end
 428   end
 429
 430   def render_content(%{data: %{"type" => object_type}} = object)
 431       when object_type in ["Article", "Page"] do
 432     with summary when not is_nil(summary) and summary != "" <- object.data["name"],
 433          url when is_bitstring(url) <- object.data["url"] do
 434       "<p><a href=\"#{url}\">#{summary}</a></p>#{object.data["content"]}"
 435     else
 436       _ -> object.data["content"] || ""
 437     end
 438   end
 439
 440   def render_content(object), do: object.data["content"] || ""
 441
 442   @doc """
 443   Builds a dictionary tags.
 444
 445   ## Examples
 446
 447   iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
 448   [{"name": "fediverse", "url": "/tag/fediverse"},
 449    {"name": "nextcloud", "url": "/tag/nextcloud"}]
 450
 451   """
 452   @spec build_tags(list(any())) :: list(map())
 453   def build_tags(object_tags) when is_list(object_tags) do
 454     object_tags = for tag when is_binary(tag) <- object_tags, do: tag
 455
 456     Enum.reduce(object_tags, [], fn tag, tags ->
 457       tags ++ [%{name: tag, url: "/tag/#{URI.encode(tag)}"}]
 458     end)
 459   end
 460
 461   def build_tags(_), do: []
 462
 463   @doc """
 464   Builds list emojis.
 465
 466   Arguments: `nil` or list tuple of name and url.
 467
 468   Returns list emojis.
 469
 470   ## Examples
 471
 472   iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
 473   [%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
 474
 475   """
 476   @spec build_emojis(nil | list(tuple())) :: list(map())
 477   def build_emojis(nil), do: []
 478
 479   def build_emojis(emojis) do
 480     emojis
 481     |> Enum.map(fn {name, url} ->
 482       name = HTML.strip_tags(name)
 483
 484       url =
 485         url
 486         |> HTML.strip_tags()
 487         |> MediaProxy.url()
 488
 489       %{shortcode: name, url: url, static_url: url, visible_in_picker: false}
 490     end)
 491   end
 492
 493   defp present?(nil), do: false
 494   defp present?(false), do: false
 495   defp present?(_), do: true
 496
 497   defp pinned?(%Activity{id: id}, %User{pinned_activities: pinned_activities}),
 498     do: id in pinned_activities
 499 end