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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     emoji_tags = Transmogrifier.take_emoji_tags(user)
  79
  80     fields =
  81       user.info
  82       |> User.Info.fields()
  83       |> Enum.map(fn %{"name" => name, "value" => value} ->
  84         %{
  85           "name" => Pleroma.HTML.strip_tags(name),
  86           "value" => Pleroma.HTML.filter_tags(value, Pleroma.HTML.Scrubber.LinksOnly)
  87         }
  88       end)
  89       |> Enum.map(&Map.put(&1, "type", "PropertyValue"))
  90
  91     %{
  92       "id" => user.ap_id,
  93       "type" => "Person",
  94       "following" => "#{user.ap_id}/following",
  95       "followers" => "#{user.ap_id}/followers",
  96       "inbox" => "#{user.ap_id}/inbox",
  97       "outbox" => "#{user.ap_id}/outbox",
  98       "preferredUsername" => user.nickname,
  99       "name" => user.name,
 100       "summary" => user.bio,
 101       "url" => user.ap_id,
 102       "manuallyApprovesFollowers" => user.info.locked,
 103       "publicKey" => %{
 104         "id" => "#{user.ap_id}#main-key",
 105         "owner" => user.ap_id,
 106         "publicKeyPem" => public_key
 107       },
 108       "endpoints" => endpoints,
 109       "attachment" => fields,
 110       "tag" => (user.info.source_data["tag"] || []) ++ emoji_tags
 111     }
 112     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
 113     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))
 114     |> Map.merge(Utils.make_json_ld_header())
 115   end
 116
 117   def render("following.json", %{user: user, page: page} = opts) do
 118     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 119     showing_count = showing_items || !user.info.hide_follows_count
 120
 121     query = User.get_friends_query(user)
 122     query = from(user in query, select: [:ap_id])
 123     following = Repo.all(query)
 124
 125     total =
 126       if showing_count do
 127         length(following)
 128       else
 129         0
 130       end
 131
 132     collection(following, "#{user.ap_id}/following", page, showing_items, total)
 133     |> Map.merge(Utils.make_json_ld_header())
 134   end
 135
 136   def render("following.json", %{user: user} = opts) do
 137     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 138     showing_count = showing_items || !user.info.hide_follows_count
 139
 140     query = User.get_friends_query(user)
 141     query = from(user in query, select: [:ap_id])
 142     following = Repo.all(query)
 143
 144     total =
 145       if showing_count do
 146         length(following)
 147       else
 148         0
 149       end
 150
 151     %{
 152       "id" => "#{user.ap_id}/following",
 153       "type" => "OrderedCollection",
 154       "totalItems" => total,
 155       "first" =>
 156         if showing_items do
 157           collection(following, "#{user.ap_id}/following", 1, !user.info.hide_follows)
 158         else
 159           "#{user.ap_id}/following?page=1"
 160         end
 161     }
 162     |> Map.merge(Utils.make_json_ld_header())
 163   end
 164
 165   def render("followers.json", %{user: user, page: page} = opts) do
 166     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 167     showing_count = showing_items || !user.info.hide_followers_count
 168
 169     query = User.get_followers_query(user)
 170     query = from(user in query, select: [:ap_id])
 171     followers = Repo.all(query)
 172
 173     total =
 174       if showing_count do
 175         length(followers)
 176       else
 177         0
 178       end
 179
 180     collection(followers, "#{user.ap_id}/followers", page, showing_items, total)
 181     |> Map.merge(Utils.make_json_ld_header())
 182   end
 183
 184   def render("followers.json", %{user: user} = opts) do
 185     showing_items = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 186     showing_count = showing_items || !user.info.hide_followers_count
 187
 188     query = User.get_followers_query(user)
 189     query = from(user in query, select: [:ap_id])
 190     followers = Repo.all(query)
 191
 192     total =
 193       if showing_count do
 194         length(followers)
 195       else
 196         0
 197       end
 198
 199     %{
 200       "id" => "#{user.ap_id}/followers",
 201       "type" => "OrderedCollection",
 202       "totalItems" => total,
 203       "first" =>
 204         if showing_items do
 205           collection(followers, "#{user.ap_id}/followers", 1, showing_items, total)
 206         else
 207           "#{user.ap_id}/followers?page=1"
 208         end
 209     }
 210     |> Map.merge(Utils.make_json_ld_header())
 211   end
 212
 213   def render("outbox.json", %{user: user, max_id: max_qid}) do
 214     params = %{
 215       "limit" => "10"
 216     }
 217
 218     params =
 219       if max_qid != nil do
 220         Map.put(params, "max_id", max_qid)
 221       else
 222         params
 223       end
 224
 225     activities = ActivityPub.fetch_user_activities(user, nil, params)
 226
 227     # this is sorted chronologically, so first activity is the newest (max)
 228     {max_id, min_id, collection} =
 229       if length(activities) > 0 do
 230         {
 231           Enum.at(activities, 0).id,
 232           Enum.at(Enum.reverse(activities), 0).id,
 233           Enum.map(activities, fn act ->
 234             {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 235             data
 236           end)
 237         }
 238       else
 239         {
 240           0,
 241           0,
 242           []
 243         }
 244       end
 245
 246     iri = "#{user.ap_id}/outbox"
 247
 248     page = %{
 249       "id" => "#{iri}?max_id=#{max_id}",
 250       "type" => "OrderedCollectionPage",
 251       "partOf" => iri,
 252       "orderedItems" => collection,
 253       "next" => "#{iri}?max_id=#{min_id}"
 254     }
 255
 256     if max_qid == nil do
 257       %{
 258         "id" => iri,
 259         "type" => "OrderedCollection",
 260         "first" => page
 261       }
 262       |> Map.merge(Utils.make_json_ld_header())
 263     else
 264       page |> Map.merge(Utils.make_json_ld_header())
 265     end
 266   end
 267
 268   def render("inbox.json", %{user: user, max_id: max_qid}) do
 269     params = %{
 270       "limit" => "10"
 271     }
 272
 273     params =
 274       if max_qid != nil do
 275         Map.put(params, "max_id", max_qid)
 276       else
 277         params
 278       end
 279
 280     activities = ActivityPub.fetch_activities([user.ap_id | user.following], params)
 281
 282     min_id = Enum.at(Enum.reverse(activities), 0).id
 283     max_id = Enum.at(activities, 0).id
 284
 285     collection =
 286       Enum.map(activities, fn act ->
 287         {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 288         data
 289       end)
 290
 291     iri = "#{user.ap_id}/inbox"
 292
 293     page = %{
 294       "id" => "#{iri}?max_id=#{max_id}",
 295       "type" => "OrderedCollectionPage",
 296       "partOf" => iri,
 297       "orderedItems" => collection,
 298       "next" => "#{iri}?max_id=#{min_id}"
 299     }
 300
 301     if max_qid == nil do
 302       %{
 303         "id" => iri,
 304         "type" => "OrderedCollection",
 305         "first" => page
 306       }
 307       |> Map.merge(Utils.make_json_ld_header())
 308     else
 309       page |> Map.merge(Utils.make_json_ld_header())
 310     end
 311   end
 312
 313   def collection(collection, iri, page, show_items \\ true, total \\ nil) do
 314     offset = (page - 1) * 10
 315     items = Enum.slice(collection, offset, 10)
 316     items = Enum.map(items, fn user -> user.ap_id end)
 317     total = total || length(collection)
 318
 319     map = %{
 320       "id" => "#{iri}?page=#{page}",
 321       "type" => "OrderedCollectionPage",
 322       "partOf" => iri,
 323       "totalItems" => total,
 324       "orderedItems" => if(show_items, do: items, else: [])
 325     }
 326
 327     if offset < total do
 328       Map.put(map, "next", "#{iri}?page=#{page + 1}")
 329     else
 330       map
 331     end
 332   end
 333
 334   defp maybe_make_image(func, key, user) do
 335     if image = func.(user, no_default: true) do
 336       %{
 337         key => %{
 338           "type" => "Image",
 339           "url" => image
 340         }
 341       }
 342     else
 343       %{}
 344     end
 345   end
 346 end