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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   alias Pleroma.Activity
   9   alias Pleroma.HTML
  10   alias Pleroma.Repo
  11   alias Pleroma.User
  12   alias Pleroma.Web.CommonAPI
  13   alias Pleroma.Web.CommonAPI.Utils
  14   alias Pleroma.Web.MastodonAPI.AccountView
  15   alias Pleroma.Web.MastodonAPI.StatusView
  16   alias Pleroma.Web.MediaProxy
  17
  18   # TODO: Add cached version.
  19   defp get_replied_to_activities(activities) do
  20     activities
  21     |> Enum.map(fn
  22       %{data: %{"type" => "Create", "object" => %{"inReplyTo" => in_reply_to}}} ->
  23         in_reply_to != "" && in_reply_to
  24
  25       _ ->
  26         nil
  27     end)
  28     |> Enum.filter(& &1)
  29     |> Activity.create_by_object_ap_id()
  30     |> Repo.all()
  31     |> Enum.reduce(%{}, fn activity, acc ->
  32       Map.put(acc, activity.data["object"]["id"], activity)
  33     end)
  34   end
  35
  36   defp get_user(ap_id) do
  37     cond do
  38       user = User.get_cached_by_ap_id(ap_id) ->
  39         user
  40
  41       user = User.get_by_guessed_nickname(ap_id) ->
  42         user
  43
  44       true ->
  45         User.error_user(ap_id)
  46     end
  47   end
  48
  49   def render("index.json", opts) do
  50     replied_to_activities = get_replied_to_activities(opts.activities)
  51
  52     opts.activities
  53     |> safe_render_many(
  54       StatusView,
  55       "status.json",
  56       Map.put(opts, :replied_to_activities, replied_to_activities)
  57     )
  58   end
  59
  60   def render(
  61         "status.json",
  62         %{activity: %{data: %{"type" => "Announce", "object" => object}} = activity} = opts
  63       ) do
  64     user = get_user(activity.data["actor"])
  65     created_at = Utils.to_masto_date(activity.data["published"])
  66
  67     reblogged = Activity.get_create_by_object_ap_id(object)
  68     reblogged = render("status.json", Map.put(opts, :activity, reblogged))
  69
  70     mentions =
  71       activity.recipients
  72       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
  73       |> Enum.filter(& &1)
  74       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
  75
  76     %{
  77       id: to_string(activity.id),
  78       uri: object,
  79       url: object,
  80       account: AccountView.render("account.json", %{user: user}),
  81       in_reply_to_id: nil,
  82       in_reply_to_account_id: nil,
  83       reblog: reblogged,
  84       content: reblogged[:content] || "",
  85       created_at: created_at,
  86       reblogs_count: 0,
  87       replies_count: 0,
  88       favourites_count: 0,
  89       reblogged: false,
  90       favourited: false,
  91       bookmarked: false,
  92       muted: false,
  93       pinned: pinned?(activity, user),
  94       sensitive: false,
  95       spoiler_text: "",
  96       visibility: "public",
  97       media_attachments: reblogged[:media_attachments] || [],
  98       mentions: mentions,
  99       tags: reblogged[:tags] || [],
 100       application: %{
 101         name: "Web",
 102         website: nil
 103       },
 104       language: nil,
 105       emojis: []
 106     }
 107   end
 108
 109   def render("status.json", %{activity: %{data: %{"object" => object}} = activity} = opts) do
 110     user = get_user(activity.data["actor"])
 111
 112     like_count = object["like_count"] || 0
 113     announcement_count = object["announcement_count"] || 0
 114
 115     tags = object["tag"] || []
 116     sensitive = object["sensitive"] || Enum.member?(tags, "nsfw")
 117
 118     mentions =
 119       activity.recipients
 120       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
 121       |> Enum.filter(& &1)
 122       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 123
 124     repeated = opts[:for] && opts[:for].ap_id in (object["announcements"] || [])
 125     favorited = opts[:for] && opts[:for].ap_id in (object["likes"] || [])
 126     bookmarked = opts[:for] && object["id"] in opts[:for].bookmarks
 127
 128     attachment_data = object["attachment"] || []
 129     attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
 130
 131     created_at = Utils.to_masto_date(object["published"])
 132
 133     reply_to = get_reply_to(activity, opts)
 134     reply_to_user = reply_to && get_user(reply_to.data["actor"])
 135
 136     content =
 137       object
 138       |> render_content()
 139       |> HTML.get_cached_scrubbed_html_for_object(
 140         User.html_filter_policy(opts[:for]),
 141         activity,
 142         __MODULE__
 143       )
 144
 145     card = render("card.json", Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity))
 146
 147     %{
 148       id: to_string(activity.id),
 149       uri: object["id"],
 150       url: object["external_url"] || object["id"],
 151       account: AccountView.render("account.json", %{user: user}),
 152       in_reply_to_id: reply_to && to_string(reply_to.id),
 153       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
 154       reblog: nil,
 155       card: card,
 156       content: content,
 157       created_at: created_at,
 158       reblogs_count: announcement_count,
 159       replies_count: 0,
 160       favourites_count: like_count,
 161       reblogged: present?(repeated),
 162       favourited: present?(favorited),
 163       bookmarked: present?(bookmarked),
 164       muted: CommonAPI.thread_muted?(user, activity),
 165       pinned: pinned?(activity, user),
 166       sensitive: sensitive,
 167       spoiler_text: object["summary"] || "",
 168       visibility: get_visibility(object),
 169       media_attachments: attachments,
 170       mentions: mentions,
 171       tags: build_tags(tags),
 172       application: %{
 173         name: "Web",
 174         website: nil
 175       },
 176       language: nil,
 177       emojis: build_emojis(activity.data["object"]["emoji"])
 178     }
 179   end
 180
 181   def render("status.json", _) do
 182     nil
 183   end
 184
 185   def render("card.json", %{rich_media: rich_media, page_url: page_url}) do
 186     page_url_data = URI.parse(page_url)
 187
 188     page_url_data =
 189       if rich_media[:url] != nil do
 190         URI.merge(page_url_data, URI.parse(rich_media[:url]))
 191       else
 192         page_url_data
 193       end
 194
 195     page_url = page_url_data |> to_string
 196
 197     image_url =
 198       if rich_media[:image] != nil do
 199         URI.merge(page_url_data, URI.parse(rich_media[:image]))
 200         |> to_string
 201       else
 202         nil
 203       end
 204
 205     site_name = rich_media[:site_name] || page_url_data.host
 206
 207     %{
 208       type: "link",
 209       provider_name: site_name,
 210       provider_url: page_url_data.scheme <> "://" <> page_url_data.host,
 211       url: page_url,
 212       image: image_url |> MediaProxy.url(),
 213       title: rich_media[:title],
 214       description: rich_media[:description],
 215       pleroma: %{
 216         opengraph: rich_media
 217       }
 218     }
 219   end
 220
 221   def render("card.json", _) do
 222     nil
 223   end
 224
 225   def render("attachment.json", %{attachment: attachment}) do
 226     [attachment_url | _] = attachment["url"]
 227     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
 228     href = attachment_url["href"] |> MediaProxy.url()
 229
 230     type =
 231       cond do
 232         String.contains?(media_type, "image") -> "image"
 233         String.contains?(media_type, "video") -> "video"
 234         String.contains?(media_type, "audio") -> "audio"
 235         true -> "unknown"
 236       end
 237
 238     <<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
 239
 240     %{
 241       id: to_string(attachment["id"] || hash_id),
 242       url: href,
 243       remote_url: href,
 244       preview_url: href,
 245       text_url: href,
 246       type: type,
 247       description: attachment["name"]
 248     }
 249   end
 250
 251   def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
 252     _id = activity.data["object"]["inReplyTo"]
 253     replied_to_activities[activity.data["object"]["inReplyTo"]]
 254   end
 255
 256   def get_reply_to(%{data: %{"object" => object}}, _) do
 257     if object["inReplyTo"] && object["inReplyTo"] != "" do
 258       Activity.get_create_by_object_ap_id(object["inReplyTo"])
 259     else
 260       nil
 261     end
 262   end
 263
 264   def get_visibility(object) do
 265     public = "https://www.w3.org/ns/activitystreams#Public"
 266     to = object["to"] || []
 267     cc = object["cc"] || []
 268
 269     cond do
 270       public in to ->
 271         "public"
 272
 273       public in cc ->
 274         "unlisted"
 275
 276       # this should use the sql for the object's activity
 277       Enum.any?(to, &String.contains?(&1, "/followers")) ->
 278         "private"
 279
 280       length(cc) > 0 ->
 281         "private"
 282
 283       true ->
 284         "direct"
 285     end
 286   end
 287
 288   def render_content(%{"type" => "Video"} = object) do
 289     with name when not is_nil(name) and name != "" <- object["name"] do
 290       "<p><a href=\"#{object["id"]}\">#{name}</a></p>#{object["content"]}"
 291     else
 292       _ -> object["content"] || ""
 293     end
 294   end
 295
 296   def render_content(%{"type" => object_type} = object)
 297       when object_type in ["Article", "Page"] do
 298     with summary when not is_nil(summary) and summary != "" <- object["name"],
 299          url when is_bitstring(url) <- object["url"] do
 300       "<p><a href=\"#{url}\">#{summary}</a></p>#{object["content"]}"
 301     else
 302       _ -> object["content"] || ""
 303     end
 304   end
 305
 306   def render_content(object), do: object["content"] || ""
 307
 308   @doc """
 309   Builds a dictionary tags.
 310
 311   ## Examples
 312
 313   iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
 314   [{"name": "fediverse", "url": "/tag/fediverse"},
 315    {"name": "nextcloud", "url": "/tag/nextcloud"}]
 316
 317   """
 318   @spec build_tags(list(any())) :: list(map())
 319   def build_tags(object_tags) when is_list(object_tags) do
 320     object_tags = for tag when is_binary(tag) <- object_tags, do: tag
 321
 322     Enum.reduce(object_tags, [], fn tag, tags ->
 323       tags ++ [%{name: tag, url: "/tag/#{tag}"}]
 324     end)
 325   end
 326
 327   def build_tags(_), do: []
 328
 329   @doc """
 330   Builds list emojis.
 331
 332   Arguments: `nil` or list tuple of name and url.
 333
 334   Returns list emojis.
 335
 336   ## Examples
 337
 338   iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
 339   [%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
 340
 341   """
 342   @spec build_emojis(nil | list(tuple())) :: list(map())
 343   def build_emojis(nil), do: []
 344
 345   def build_emojis(emojis) do
 346     emojis
 347     |> Enum.map(fn {name, url} ->
 348       name = HTML.strip_tags(name)
 349
 350       url =
 351         url
 352         |> HTML.strip_tags()
 353         |> MediaProxy.url()
 354
 355       %{shortcode: name, url: url, static_url: url, visible_in_picker: false}
 356     end)
 357   end
 358
 359   defp present?(nil), do: false
 360   defp present?(false), do: false
 361   defp present?(_), do: true
 362
 363   defp pinned?(%Activity{id: id}, %User{info: %{pinned_activities: pinned_activities}}),
 364     do: id in pinned_activities
 365 end