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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       pleroma: %{
 107         local: activity.local
 108       }
 109     }
 110   end
 111
 112   def render("status.json", %{activity: %{data: %{"object" => object}} = activity} = opts) do
 113     user = get_user(activity.data["actor"])
 114
 115     like_count = object["like_count"] || 0
 116     announcement_count = object["announcement_count"] || 0
 117
 118     tags = object["tag"] || []
 119     sensitive = object["sensitive"] || Enum.member?(tags, "nsfw")
 120
 121     mentions =
 122       activity.recipients
 123       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
 124       |> Enum.filter(& &1)
 125       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 126
 127     repeated = opts[:for] && opts[:for].ap_id in (object["announcements"] || [])
 128     favorited = opts[:for] && opts[:for].ap_id in (object["likes"] || [])
 129     bookmarked = opts[:for] && object["id"] in opts[:for].bookmarks
 130
 131     attachment_data = object["attachment"] || []
 132     attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
 133
 134     created_at = Utils.to_masto_date(object["published"])
 135
 136     reply_to = get_reply_to(activity, opts)
 137     reply_to_user = reply_to && get_user(reply_to.data["actor"])
 138
 139     content =
 140       object
 141       |> render_content()
 142       |> HTML.get_cached_scrubbed_html_for_object(
 143         User.html_filter_policy(opts[:for]),
 144         activity,
 145         __MODULE__
 146       )
 147
 148     card = render("card.json", Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity))
 149
 150     url =
 151       if user.local do
 152         Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice, activity)
 153       else
 154         object["external_url"] || object["id"]
 155       end
 156
 157     %{
 158       id: to_string(activity.id),
 159       uri: object["id"],
 160       url: url,
 161       account: AccountView.render("account.json", %{user: user}),
 162       in_reply_to_id: reply_to && to_string(reply_to.id),
 163       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
 164       reblog: nil,
 165       card: card,
 166       content: content,
 167       created_at: created_at,
 168       reblogs_count: announcement_count,
 169       replies_count: 0,
 170       favourites_count: like_count,
 171       reblogged: present?(repeated),
 172       favourited: present?(favorited),
 173       bookmarked: present?(bookmarked),
 174       muted: CommonAPI.thread_muted?(user, activity) || User.mutes?(opts[:for], user),
 175       pinned: pinned?(activity, user),
 176       sensitive: sensitive,
 177       spoiler_text: object["summary"] || "",
 178       visibility: get_visibility(object),
 179       media_attachments: attachments,
 180       mentions: mentions,
 181       tags: build_tags(tags),
 182       application: %{
 183         name: "Web",
 184         website: nil
 185       },
 186       language: nil,
 187       emojis: build_emojis(activity.data["object"]["emoji"]),
 188       pleroma: %{
 189         local: activity.local
 190       }
 191     }
 192   end
 193
 194   def render("status.json", _) do
 195     nil
 196   end
 197
 198   def render("card.json", %{rich_media: rich_media, page_url: page_url}) do
 199     page_url_data = URI.parse(page_url)
 200
 201     page_url_data =
 202       if rich_media[:url] != nil do
 203         URI.merge(page_url_data, URI.parse(rich_media[:url]))
 204       else
 205         page_url_data
 206       end
 207
 208     page_url = page_url_data |> to_string
 209
 210     image_url =
 211       if rich_media[:image] != nil do
 212         URI.merge(page_url_data, URI.parse(rich_media[:image]))
 213         |> to_string
 214       else
 215         nil
 216       end
 217
 218     site_name = rich_media[:site_name] || page_url_data.host
 219
 220     %{
 221       type: "link",
 222       provider_name: site_name,
 223       provider_url: page_url_data.scheme <> "://" <> page_url_data.host,
 224       url: page_url,
 225       image: image_url |> MediaProxy.url(),
 226       title: rich_media[:title],
 227       description: rich_media[:description],
 228       pleroma: %{
 229         opengraph: rich_media
 230       }
 231     }
 232   end
 233
 234   def render("card.json", _) do
 235     nil
 236   end
 237
 238   def render("attachment.json", %{attachment: attachment}) do
 239     [attachment_url | _] = attachment["url"]
 240     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
 241     href = attachment_url["href"] |> MediaProxy.url()
 242
 243     type =
 244       cond do
 245         String.contains?(media_type, "image") -> "image"
 246         String.contains?(media_type, "video") -> "video"
 247         String.contains?(media_type, "audio") -> "audio"
 248         true -> "unknown"
 249       end
 250
 251     <<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
 252
 253     %{
 254       id: to_string(attachment["id"] || hash_id),
 255       url: href,
 256       remote_url: href,
 257       preview_url: href,
 258       text_url: href,
 259       type: type,
 260       description: attachment["name"],
 261       pleroma: %{mime_type: media_type}
 262     }
 263   end
 264
 265   def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
 266     _id = activity.data["object"]["inReplyTo"]
 267     replied_to_activities[activity.data["object"]["inReplyTo"]]
 268   end
 269
 270   def get_reply_to(%{data: %{"object" => object}}, _) do
 271     if object["inReplyTo"] && object["inReplyTo"] != "" do
 272       Activity.get_create_by_object_ap_id(object["inReplyTo"])
 273     else
 274       nil
 275     end
 276   end
 277
 278   def get_visibility(object) do
 279     public = "https://www.w3.org/ns/activitystreams#Public"
 280     to = object["to"] || []
 281     cc = object["cc"] || []
 282
 283     cond do
 284       public in to ->
 285         "public"
 286
 287       public in cc ->
 288         "unlisted"
 289
 290       # this should use the sql for the object's activity
 291       Enum.any?(to, &String.contains?(&1, "/followers")) ->
 292         "private"
 293
 294       length(cc) > 0 ->
 295         "private"
 296
 297       true ->
 298         "direct"
 299     end
 300   end
 301
 302   def render_content(%{"type" => "Video"} = object) do
 303     with name when not is_nil(name) and name != "" <- object["name"] do
 304       "<p><a href=\"#{object["id"]}\">#{name}</a></p>#{object["content"]}"
 305     else
 306       _ -> object["content"] || ""
 307     end
 308   end
 309
 310   def render_content(%{"type" => object_type} = object)
 311       when object_type in ["Article", "Page"] do
 312     with summary when not is_nil(summary) and summary != "" <- object["name"],
 313          url when is_bitstring(url) <- object["url"] do
 314       "<p><a href=\"#{url}\">#{summary}</a></p>#{object["content"]}"
 315     else
 316       _ -> object["content"] || ""
 317     end
 318   end
 319
 320   def render_content(object), do: object["content"] || ""
 321
 322   @doc """
 323   Builds a dictionary tags.
 324
 325   ## Examples
 326
 327   iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
 328   [{"name": "fediverse", "url": "/tag/fediverse"},
 329    {"name": "nextcloud", "url": "/tag/nextcloud"}]
 330
 331   """
 332   @spec build_tags(list(any())) :: list(map())
 333   def build_tags(object_tags) when is_list(object_tags) do
 334     object_tags = for tag when is_binary(tag) <- object_tags, do: tag
 335
 336     Enum.reduce(object_tags, [], fn tag, tags ->
 337       tags ++ [%{name: tag, url: "/tag/#{tag}"}]
 338     end)
 339   end
 340
 341   def build_tags(_), do: []
 342
 343   @doc """
 344   Builds list emojis.
 345
 346   Arguments: `nil` or list tuple of name and url.
 347
 348   Returns list emojis.
 349
 350   ## Examples
 351
 352   iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
 353   [%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
 354
 355   """
 356   @spec build_emojis(nil | list(tuple())) :: list(map())
 357   def build_emojis(nil), do: []
 358
 359   def build_emojis(emojis) do
 360     emojis
 361     |> Enum.map(fn {name, url} ->
 362       name = HTML.strip_tags(name)
 363
 364       url =
 365         url
 366         |> HTML.strip_tags()
 367         |> MediaProxy.url()
 368
 369       %{shortcode: name, url: url, static_url: url, visible_in_picker: false}
 370     end)
 371   end
 372
 373   defp present?(nil), do: false
 374   defp present?(false), do: false
 375   defp present?(_), do: true
 376
 377   defp pinned?(%Activity{id: id}, %User{info: %{pinned_activities: pinned_activities}}),
 378     do: id in pinned_activities
 379 end