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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2018 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.Utils
  13   alias Pleroma.Web.MediaProxy
  14   alias Pleroma.Web.MastodonAPI.AccountView
  15   alias Pleroma.Web.MastodonAPI.StatusView
  16
  17   # TODO: Add cached version.
  18   defp get_replied_to_activities(activities) do
  19     activities
  20     |> Enum.map(fn
  21       %{data: %{"type" => "Create", "object" => %{"inReplyTo" => in_reply_to}}} ->
  22         in_reply_to != "" && in_reply_to
  23
  24       _ ->
  25         nil
  26     end)
  27     |> Enum.filter(& &1)
  28     |> Activity.create_activity_by_object_id_query()
  29     |> Repo.all()
  30     |> Enum.reduce(%{}, fn activity, acc ->
  31       Map.put(acc, activity.data["object"]["id"], activity)
  32     end)
  33   end
  34
  35   def render("index.json", opts) do
  36     replied_to_activities = get_replied_to_activities(opts.activities)
  37
  38     opts.activities
  39     |> render_many(
  40       StatusView,
  41       "status.json",
  42       Map.put(opts, :replied_to_activities, replied_to_activities)
  43     )
  44     |> Enum.filter(fn x -> not is_nil(x) end)
  45   end
  46
  47   def render(
  48         "status.json",
  49         %{activity: %{data: %{"type" => "Announce", "object" => object}} = activity} = opts
  50       ) do
  51     user = User.get_cached_by_ap_id(activity.data["actor"])
  52     created_at = Utils.to_masto_date(activity.data["published"])
  53
  54     reblogged = Activity.get_create_activity_by_object_ap_id(object)
  55     reblogged = render("status.json", Map.put(opts, :activity, reblogged))
  56
  57     mentions =
  58       activity.recipients
  59       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
  60       |> Enum.filter(& &1)
  61       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
  62
  63     %{
  64       id: to_string(activity.id),
  65       uri: object,
  66       url: object,
  67       account: AccountView.render("account.json", %{user: user}),
  68       in_reply_to_id: nil,
  69       in_reply_to_account_id: nil,
  70       reblog: reblogged,
  71       content: reblogged[:content] || "",
  72       created_at: created_at,
  73       reblogs_count: 0,
  74       replies_count: 0,
  75       favourites_count: 0,
  76       reblogged: false,
  77       favourited: false,
  78       muted: false,
  79       sensitive: false,
  80       spoiler_text: "",
  81       visibility: "public",
  82       media_attachments: reblogged[:media_attachments] || [],
  83       mentions: mentions,
  84       tags: reblogged[:tags] || [],
  85       application: %{
  86         name: "Web",
  87         website: nil
  88       },
  89       language: nil,
  90       emojis: []
  91     }
  92   end
  93
  94   def render("status.json", %{activity: %{data: %{"object" => object}} = activity} = opts) do
  95     user = User.get_cached_by_ap_id(activity.data["actor"])
  96
  97     like_count = object["like_count"] || 0
  98     announcement_count = object["announcement_count"] || 0
  99
 100     tags = object["tag"] || []
 101     sensitive = object["sensitive"] || Enum.member?(tags, "nsfw")
 102
 103     mentions =
 104       activity.recipients
 105       |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
 106       |> Enum.filter(& &1)
 107       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 108
 109     repeated = opts[:for] && opts[:for].ap_id in (object["announcements"] || [])
 110     favorited = opts[:for] && opts[:for].ap_id in (object["likes"] || [])
 111
 112     attachment_data = object["attachment"] || []
 113     attachments = render_many(attachment_data, StatusView, "attachment.json", as: :attachment)
 114
 115     created_at = Utils.to_masto_date(object["published"])
 116
 117     reply_to = get_reply_to(activity, opts)
 118     reply_to_user = reply_to && User.get_cached_by_ap_id(reply_to.data["actor"])
 119
 120     content =
 121       object
 122       |> render_content()
 123       |> HTML.filter_tags(User.html_filter_policy(opts[:for]))
 124
 125     %{
 126       id: to_string(activity.id),
 127       uri: object["id"],
 128       url: object["external_url"] || object["id"],
 129       account: AccountView.render("account.json", %{user: user}),
 130       in_reply_to_id: reply_to && to_string(reply_to.id),
 131       in_reply_to_account_id: reply_to_user && to_string(reply_to_user.id),
 132       reblog: nil,
 133       content: content,
 134       created_at: created_at,
 135       reblogs_count: announcement_count,
 136       replies_count: 0,
 137       favourites_count: like_count,
 138       reblogged: present?(repeated),
 139       favourited: present?(favorited),
 140       muted: false,
 141       sensitive: sensitive,
 142       spoiler_text: object["summary"] || "",
 143       visibility: get_visibility(object),
 144       media_attachments: attachments |> Enum.take(4),
 145       mentions: mentions,
 146       tags: build_tags(tags),
 147       application: %{
 148         name: "Web",
 149         website: nil
 150       },
 151       language: nil,
 152       emojis: build_emojis(activity.data["object"]["emoji"])
 153     }
 154   end
 155
 156   def render("status.json", _) do
 157     nil
 158   end
 159
 160   def render("attachment.json", %{attachment: attachment}) do
 161     [attachment_url | _] = attachment["url"]
 162     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
 163     href = attachment_url["href"] |> MediaProxy.url()
 164
 165     type =
 166       cond do
 167         String.contains?(media_type, "image") -> "image"
 168         String.contains?(media_type, "video") -> "video"
 169         String.contains?(media_type, "audio") -> "audio"
 170         true -> "unknown"
 171       end
 172
 173     <<hash_id::signed-32, _rest::binary>> = :crypto.hash(:md5, href)
 174
 175     %{
 176       id: to_string(attachment["id"] || hash_id),
 177       url: href,
 178       remote_url: href,
 179       preview_url: href,
 180       text_url: href,
 181       type: type,
 182       description: attachment["name"]
 183     }
 184   end
 185
 186   def get_reply_to(activity, %{replied_to_activities: replied_to_activities}) do
 187     _id = activity.data["object"]["inReplyTo"]
 188     replied_to_activities[activity.data["object"]["inReplyTo"]]
 189   end
 190
 191   def get_reply_to(%{data: %{"object" => object}}, _) do
 192     if object["inReplyTo"] && object["inReplyTo"] != "" do
 193       Activity.get_create_activity_by_object_ap_id(object["inReplyTo"])
 194     else
 195       nil
 196     end
 197   end
 198
 199   def get_visibility(object) do
 200     public = "https://www.w3.org/ns/activitystreams#Public"
 201     to = object["to"] || []
 202     cc = object["cc"] || []
 203
 204     cond do
 205       public in to ->
 206         "public"
 207
 208       public in cc ->
 209         "unlisted"
 210
 211       # this should use the sql for the object's activity
 212       Enum.any?(to, &String.contains?(&1, "/followers")) ->
 213         "private"
 214
 215       true ->
 216         "direct"
 217     end
 218   end
 219
 220   def render_content(%{"type" => "Video"} = object) do
 221     with name when not is_nil(name) and name != "" <- object["name"] do
 222       "<p><a href=\"#{object["id"]}\">#{name}</a></p>#{object["content"]}"
 223     else
 224       _ -> object["content"] || ""
 225     end
 226   end
 227
 228   def render_content(%{"type" => object_type} = object)
 229       when object_type in ["Article", "Page"] do
 230     with summary when not is_nil(summary) and summary != "" <- object["name"],
 231          url when is_bitstring(url) <- object["url"] do
 232       "<p><a href=\"#{url}\">#{summary}</a></p>#{object["content"]}"
 233     else
 234       _ -> object["content"] || ""
 235     end
 236   end
 237
 238   def render_content(object), do: object["content"] || ""
 239
 240   @doc """
 241   Builds a dictionary tags.
 242
 243   ## Examples
 244
 245   iex> Pleroma.Web.MastodonAPI.StatusView.build_tags(["fediverse", "nextcloud"])
 246   [{"name": "fediverse", "url": "/tag/fediverse"},
 247    {"name": "nextcloud", "url": "/tag/nextcloud"}]
 248
 249   """
 250   @spec build_tags(list(any())) :: list(map())
 251   def build_tags(object_tags) when is_list(object_tags) do
 252     object_tags = for tag when is_binary(tag) <- object_tags, do: tag
 253
 254     Enum.reduce(object_tags, [], fn tag, tags ->
 255       tags ++ [%{name: tag, url: "/tag/#{tag}"}]
 256     end)
 257   end
 258
 259   def build_tags(_), do: []
 260
 261   @doc """
 262   Builds list emojis.
 263
 264   Arguments: `nil` or list tuple of name and url.
 265
 266   Returns list emojis.
 267
 268   ## Examples
 269
 270   iex> Pleroma.Web.MastodonAPI.StatusView.build_emojis([{"2hu", "corndog.png"}])
 271   [%{shortcode: "2hu", static_url: "corndog.png", url: "corndog.png", visible_in_picker: false}]
 272
 273   """
 274   @spec build_emojis(nil | list(tuple())) :: list(map())
 275   def build_emojis(nil), do: []
 276
 277   def build_emojis(emojis) do
 278     emojis
 279     |> Enum.map(fn {name, url} ->
 280       name = HTML.strip_tags(name)
 281
 282       url =
 283         url
 284         |> HTML.strip_tags()
 285         |> MediaProxy.url()
 286
 287       %{shortcode: name, url: url, static_url: url, visible_in_picker: false}
 288     end)
 289   end
 290
 291   defp present?(nil), do: false
 292   defp present?(false), do: false
 293   defp present?(_), do: true
 294 end