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