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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.ActivityPub.UserView do
   6   use Pleroma.Web, :view
   7
   8   alias Pleroma.Keys
   9   alias Pleroma.Repo
  10   alias Pleroma.User
  11   alias Pleroma.Web.ActivityPub.ActivityPub
  12   alias Pleroma.Web.ActivityPub.Transmogrifier
  13   alias Pleroma.Web.ActivityPub.Utils
  14   alias Pleroma.Web.Endpoint
  15   alias Pleroma.Web.Router.Helpers
  16
  17   import Ecto.Query
  18
  19   def render("endpoints.json", %{user: %User{nickname: nil, local: true} = _user}) do
  20     %{"sharedInbox" => Helpers.activity_pub_url(Endpoint, :inbox)}
  21   end
  22
  23   def render("endpoints.json", %{user: %User{local: true} = _user}) do
  24     %{
  25       "oauthAuthorizationEndpoint" => Helpers.o_auth_url(Endpoint, :authorize),
  26       "oauthRegistrationEndpoint" => Helpers.mastodon_api_url(Endpoint, :create_app),
  27       "oauthTokenEndpoint" => Helpers.o_auth_url(Endpoint, :token_exchange),
  28       "sharedInbox" => Helpers.activity_pub_url(Endpoint, :inbox)
  29     }
  30   end
  31
  32   def render("endpoints.json", _), do: %{}
  33
  34   def render("service.json", %{user: user}) do
  35     {:ok, user} = User.ensure_keys_present(user)
  36     {:ok, _, public_key} = Keys.keys_from_pem(user.info.keys)
  37     public_key = :public_key.pem_entry_encode(:SubjectPublicKeyInfo, public_key)
  38     public_key = :public_key.pem_encode([public_key])
  39
  40     endpoints = render("endpoints.json", %{user: user})
  41
  42     %{
  43       "id" => user.ap_id,
  44       "type" => "Application",
  45       "following" => "#{user.ap_id}/following",
  46       "followers" => "#{user.ap_id}/followers",
  47       "inbox" => "#{user.ap_id}/inbox",
  48       "name" => "Pleroma",
  49       "summary" =>
  50         "An internal service actor for this Pleroma instance.  No user-serviceable parts inside.",
  51       "url" => user.ap_id,
  52       "manuallyApprovesFollowers" => false,
  53       "publicKey" => %{
  54         "id" => "#{user.ap_id}#main-key",
  55         "owner" => user.ap_id,
  56         "publicKeyPem" => public_key
  57       },
  58       "endpoints" => endpoints
  59     }
  60     |> Map.merge(Utils.make_json_ld_header())
  61   end
  62
  63   # the instance itself is not a Person, but instead an Application
  64   def render("user.json", %{user: %User{nickname: nil} = user}),
  65     do: render("service.json", %{user: user})
  66
  67   def render("user.json", %{user: %User{nickname: "internal." <> _} = user}),
  68     do: render("service.json", %{user: user}) |> Map.put("preferredUsername", user.nickname)
  69
  70   def render("user.json", %{user: user}) do
  71     {:ok, user} = User.ensure_keys_present(user)
  72     {:ok, _, public_key} = Keys.keys_from_pem(user.info.keys)
  73     public_key = :public_key.pem_entry_encode(:SubjectPublicKeyInfo, public_key)
  74     public_key = :public_key.pem_encode([public_key])
  75
  76     endpoints = render("endpoints.json", %{user: user})
  77
  78     user_tags =
  79       user
  80       |> Transmogrifier.add_emoji_tags()
  81       |> Map.get("tag", [])
  82
  83     fields =
  84       user.info
  85       |> User.Info.fields()
  86       |> Enum.map(fn %{"name" => name, "value" => value} ->
  87         %{
  88           "name" => Pleroma.HTML.strip_tags(name),
  89           "value" => Pleroma.HTML.filter_tags(value, Pleroma.HTML.Scrubber.LinksOnly)
  90         }
  91       end)
  92       |> Enum.map(&Map.put(&1, "type", "PropertyValue"))
  93
  94     %{
  95       "id" => user.ap_id,
  96       "type" => "Person",
  97       "following" => "#{user.ap_id}/following",
  98       "followers" => "#{user.ap_id}/followers",
  99       "inbox" => "#{user.ap_id}/inbox",
 100       "outbox" => "#{user.ap_id}/outbox",
 101       "preferredUsername" => user.nickname,
 102       "name" => user.name,
 103       "summary" => user.bio,
 104       "url" => user.ap_id,
 105       "manuallyApprovesFollowers" => user.info.locked,
 106       "publicKey" => %{
 107         "id" => "#{user.ap_id}#main-key",
 108         "owner" => user.ap_id,
 109         "publicKeyPem" => public_key
 110       },
 111       "endpoints" => endpoints,
 112       "attachment" => fields,
 113       "tag" => (user.info.source_data["tag"] || []) ++ user_tags
 114     }
 115     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
 116     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))
 117     |> Map.merge(Utils.make_json_ld_header())
 118   end
 119
 120   def render("following.json", %{user: user, page: page} = opts) do
 121     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 122     showing_count = showing_items || !user.info.hide_follows_count
 123
 124     query = User.get_friends_query(user)
 125     query = from(user in query, select: [:ap_id])
 126     following = Repo.all(query)
 127
 128     total =
 129       if showing_count do
 130         length(following)
 131       else
 132         0
 133       end
 134
 135     collection(following, "#{user.ap_id}/following", page, showing_items, total)
 136     |> Map.merge(Utils.make_json_ld_header())
 137   end
 138
 139   def render("following.json", %{user: user} = opts) do
 140     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 141     showing_count = showing_items || !user.info.hide_follows_count
 142
 143     query = User.get_friends_query(user)
 144     query = from(user in query, select: [:ap_id])
 145     following = Repo.all(query)
 146
 147     total =
 148       if showing_count do
 149         length(following)
 150       else
 151         0
 152       end
 153
 154     %{
 155       "id" => "#{user.ap_id}/following",
 156       "type" => "OrderedCollection",
 157       "totalItems" => total,
 158       "first" =>
 159         if showing_items do
 160           collection(following, "#{user.ap_id}/following", 1, !user.info.hide_follows)
 161         else
 162           "#{user.ap_id}/following?page=1"
 163         end
 164     }
 165     |> Map.merge(Utils.make_json_ld_header())
 166   end
 167
 168   def render("followers.json", %{user: user, page: page} = opts) do
 169     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 170     showing_count = showing_items || !user.info.hide_followers_count
 171
 172     query = User.get_followers_query(user)
 173     query = from(user in query, select: [:ap_id])
 174     followers = Repo.all(query)
 175
 176     total =
 177       if showing_count do
 178         length(followers)
 179       else
 180         0
 181       end
 182
 183     collection(followers, "#{user.ap_id}/followers", page, showing_items, total)
 184     |> Map.merge(Utils.make_json_ld_header())
 185   end
 186
 187   def render("followers.json", %{user: user} = opts) do
 188     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 189     showing_count = showing_items || !user.info.hide_followers_count
 190
 191     query = User.get_followers_query(user)
 192     query = from(user in query, select: [:ap_id])
 193     followers = Repo.all(query)
 194
 195     total =
 196       if showing_count do
 197         length(followers)
 198       else
 199         0
 200       end
 201
 202     %{
 203       "id" => "#{user.ap_id}/followers",
 204       "type" => "OrderedCollection",
 205       "totalItems" => total,
 206       "first" =>
 207         if showing_items do
 208           collection(followers, "#{user.ap_id}/followers", 1, showing_items, total)
 209         else
 210           "#{user.ap_id}/followers?page=1"
 211         end
 212     }
 213     |> Map.merge(Utils.make_json_ld_header())
 214   end
 215
 216   def render("outbox.json", %{user: user, max_id: max_qid}) do
 217     params = %{
 218       "limit" => "10"
 219     }
 220
 221     params =
 222       if max_qid != nil do
 223         Map.put(params, "max_id", max_qid)
 224       else
 225         params
 226       end
 227
 228     activities = ActivityPub.fetch_user_activities(user, nil, params)
 229
 230     # this is sorted chronologically, so first activity is the newest (max)
 231     {max_id, min_id, collection} =
 232       if length(activities) > 0 do
 233         {
 234           Enum.at(activities, 0).id,
 235           Enum.at(Enum.reverse(activities), 0).id,
 236           Enum.map(activities, fn act ->
 237             {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 238             data
 239           end)
 240         }
 241       else
 242         {
 243           0,
 244           0,
 245           []
 246         }
 247       end
 248
 249     iri = "#{user.ap_id}/outbox"
 250
 251     page = %{
 252       "id" => "#{iri}?max_id=#{max_id}",
 253       "type" => "OrderedCollectionPage",
 254       "partOf" => iri,
 255       "orderedItems" => collection,
 256       "next" => "#{iri}?max_id=#{min_id}"
 257     }
 258
 259     if max_qid == nil do
 260       %{
 261         "id" => iri,
 262         "type" => "OrderedCollection",
 263         "first" => page
 264       }
 265       |> Map.merge(Utils.make_json_ld_header())
 266     else
 267       page |> Map.merge(Utils.make_json_ld_header())
 268     end
 269   end
 270
 271   def render("inbox.json", %{user: user, max_id: max_qid}) do
 272     params = %{
 273       "limit" => "10"
 274     }
 275
 276     params =
 277       if max_qid != nil do
 278         Map.put(params, "max_id", max_qid)
 279       else
 280         params
 281       end
 282
 283     activities = ActivityPub.fetch_activities([user.ap_id | user.following], params)
 284
 285     min_id = Enum.at(Enum.reverse(activities), 0).id
 286     max_id = Enum.at(activities, 0).id
 287
 288     collection =
 289       Enum.map(activities, fn act ->
 290         {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 291         data
 292       end)
 293
 294     iri = "#{user.ap_id}/inbox"
 295
 296     page = %{
 297       "id" => "#{iri}?max_id=#{max_id}",
 298       "type" => "OrderedCollectionPage",
 299       "partOf" => iri,
 300       "orderedItems" => collection,
 301       "next" => "#{iri}?max_id=#{min_id}"
 302     }
 303
 304     if max_qid == nil do
 305       %{
 306         "id" => iri,
 307         "type" => "OrderedCollection",
 308         "first" => page
 309       }
 310       |> Map.merge(Utils.make_json_ld_header())
 311     else
 312       page |> Map.merge(Utils.make_json_ld_header())
 313     end
 314   end
 315
 316   def collection(collection, iri, page, show_items \\ true, total \\ nil) do
 317     offset = (page - 1) * 10
 318     items = Enum.slice(collection, offset, 10)
 319     items = Enum.map(items, fn user -> user.ap_id end)
 320     total = total || length(collection)
 321
 322     map = %{
 323       "id" => "#{iri}?page=#{page}",
 324       "type" => "OrderedCollectionPage",
 325       "partOf" => iri,
 326       "totalItems" => total,
 327       "orderedItems" => if(show_items, do: items, else: [])
 328     }
 329
 330     if offset < total do
 331       Map.put(map, "next", "#{iri}?page=#{page + 1}")
 332     else
 333       map
 334     end
 335   end
 336
 337   defp maybe_make_image(func, key, user) do
 338     if image = func.(user, no_default: true) do
 339       %{
 340         key => %{
 341           "type" => "Image",
 342           "url" => image
 343         }
 344       }
 345     else
 346       %{}
 347     end
 348   end
 349 end