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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   # the instance itself is not a Person, but instead an Application
  35   def render("user.json", %{user: %{nickname: nil} = 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" => "Virtual actor for Pleroma relay",
  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   def render("user.json", %{user: user}) do
  64     {:ok, user} = User.ensure_keys_present(user)
  65     {:ok, _, public_key} = Keys.keys_from_pem(user.info.keys)
  66     public_key = :public_key.pem_entry_encode(:SubjectPublicKeyInfo, public_key)
  67     public_key = :public_key.pem_encode([public_key])
  68
  69     endpoints = render("endpoints.json", %{user: user})
  70
  71     user_tags =
  72       user
  73       |> Transmogrifier.add_emoji_tags()
  74       |> Map.get("tag", [])
  75
  76     %{
  77       "id" => user.ap_id,
  78       "type" => "Person",
  79       "following" => "#{user.ap_id}/following",
  80       "followers" => "#{user.ap_id}/followers",
  81       "inbox" => "#{user.ap_id}/inbox",
  82       "outbox" => "#{user.ap_id}/outbox",
  83       "preferredUsername" => user.nickname,
  84       "name" => user.name,
  85       "summary" => user.bio,
  86       "url" => user.ap_id,
  87       "manuallyApprovesFollowers" => user.info.locked,
  88       "publicKey" => %{
  89         "id" => "#{user.ap_id}#main-key",
  90         "owner" => user.ap_id,
  91         "publicKeyPem" => public_key
  92       },
  93       "endpoints" => endpoints,
  94       "tag" => (user.info.source_data["tag"] || []) ++ user_tags
  95     }
  96     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
  97     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))
  98     |> Map.merge(Utils.make_json_ld_header())
  99   end
 100
 101   def render("following.json", %{user: user, page: page} = opts) do
 102     showing = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 103     query = User.get_friends_query(user)
 104     query = from(user in query, select: [:ap_id])
 105     following = Repo.all(query)
 106
 107     total =
 108       if showing do
 109         length(following)
 110       else
 111         0
 112       end
 113
 114     collection(following, "#{user.ap_id}/following", page, showing, total)
 115     |> Map.merge(Utils.make_json_ld_header())
 116   end
 117
 118   def render("following.json", %{user: user} = opts) do
 119     showing = (opts[:for] && opts[:for] == user) || !user.info.hide_follows
 120     query = User.get_friends_query(user)
 121     query = from(user in query, select: [:ap_id])
 122     following = Repo.all(query)
 123
 124     total =
 125       if showing do
 126         length(following)
 127       else
 128         0
 129       end
 130
 131     %{
 132       "id" => "#{user.ap_id}/following",
 133       "type" => "OrderedCollection",
 134       "totalItems" => total,
 135       "first" =>
 136         if showing do
 137           collection(following, "#{user.ap_id}/following", 1, !user.info.hide_follows)
 138         else
 139           "#{user.ap_id}/following?page=1"
 140         end
 141     }
 142     |> Map.merge(Utils.make_json_ld_header())
 143   end
 144
 145   def render("followers.json", %{user: user, page: page} = opts) do
 146     showing = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 147
 148     query = User.get_followers_query(user)
 149     query = from(user in query, select: [:ap_id])
 150     followers = Repo.all(query)
 151
 152     total =
 153       if showing do
 154         length(followers)
 155       else
 156         0
 157       end
 158
 159     collection(followers, "#{user.ap_id}/followers", page, showing, total)
 160     |> Map.merge(Utils.make_json_ld_header())
 161   end
 162
 163   def render("followers.json", %{user: user} = opts) do
 164     showing = (opts[:for] && opts[:for] == user) || !user.info.hide_followers
 165
 166     query = User.get_followers_query(user)
 167     query = from(user in query, select: [:ap_id])
 168     followers = Repo.all(query)
 169
 170     total =
 171       if showing do
 172         length(followers)
 173       else
 174         0
 175       end
 176
 177     %{
 178       "id" => "#{user.ap_id}/followers",
 179       "type" => "OrderedCollection",
 180       "totalItems" => total,
 181       "first" =>
 182         if showing do
 183           collection(followers, "#{user.ap_id}/followers", 1, showing, total)
 184         else
 185           "#{user.ap_id}/followers?page=1"
 186         end
 187     }
 188     |> Map.merge(Utils.make_json_ld_header())
 189   end
 190
 191   def render("outbox.json", %{user: user, max_id: max_qid}) do
 192     params = %{
 193       "limit" => "10"
 194     }
 195
 196     params =
 197       if max_qid != nil do
 198         Map.put(params, "max_id", max_qid)
 199       else
 200         params
 201       end
 202
 203     activities = ActivityPub.fetch_user_activities(user, nil, params)
 204
 205     {max_id, min_id, collection} =
 206       if length(activities) > 0 do
 207         {
 208           Enum.at(Enum.reverse(activities), 0).id,
 209           Enum.at(activities, 0).id,
 210           Enum.map(activities, fn act ->
 211             {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 212             data
 213           end)
 214         }
 215       else
 216         {
 217           0,
 218           0,
 219           []
 220         }
 221       end
 222
 223     iri = "#{user.ap_id}/outbox"
 224
 225     page = %{
 226       "id" => "#{iri}?max_id=#{max_id}",
 227       "type" => "OrderedCollectionPage",
 228       "partOf" => iri,
 229       "orderedItems" => collection,
 230       "next" => "#{iri}?max_id=#{min_id}"
 231     }
 232
 233     if max_qid == nil do
 234       %{
 235         "id" => iri,
 236         "type" => "OrderedCollection",
 237         "first" => page
 238       }
 239       |> Map.merge(Utils.make_json_ld_header())
 240     else
 241       page |> Map.merge(Utils.make_json_ld_header())
 242     end
 243   end
 244
 245   def render("inbox.json", %{user: user, max_id: max_qid}) do
 246     params = %{
 247       "limit" => "10"
 248     }
 249
 250     params =
 251       if max_qid != nil do
 252         Map.put(params, "max_id", max_qid)
 253       else
 254         params
 255       end
 256
 257     activities = ActivityPub.fetch_activities([user.ap_id | user.following], params)
 258
 259     min_id = Enum.at(Enum.reverse(activities), 0).id
 260     max_id = Enum.at(activities, 0).id
 261
 262     collection =
 263       Enum.map(activities, fn act ->
 264         {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
 265         data
 266       end)
 267
 268     iri = "#{user.ap_id}/inbox"
 269
 270     page = %{
 271       "id" => "#{iri}?max_id=#{max_id}",
 272       "type" => "OrderedCollectionPage",
 273       "partOf" => iri,
 274       "orderedItems" => collection,
 275       "next" => "#{iri}?max_id=#{min_id}"
 276     }
 277
 278     if max_qid == nil do
 279       %{
 280         "id" => iri,
 281         "type" => "OrderedCollection",
 282         "first" => page
 283       }
 284       |> Map.merge(Utils.make_json_ld_header())
 285     else
 286       page |> Map.merge(Utils.make_json_ld_header())
 287     end
 288   end
 289
 290   def collection(collection, iri, page, show_items \\ true, total \\ nil) do
 291     offset = (page - 1) * 10
 292     items = Enum.slice(collection, offset, 10)
 293     items = Enum.map(items, fn user -> user.ap_id end)
 294     total = total || length(collection)
 295
 296     map = %{
 297       "id" => "#{iri}?page=#{page}",
 298       "type" => "OrderedCollectionPage",
 299       "partOf" => iri,
 300       "totalItems" => total,
 301       "orderedItems" => if(show_items, do: items, else: [])
 302     }
 303
 304     if offset < total do
 305       Map.put(map, "next", "#{iri}?page=#{page + 1}")
 306     else
 307       map
 308     end
 309   end
 310
 311   defp maybe_make_image(func, key, user) do
 312     if image = func.(user, no_default: true) do
 313       %{
 314         key => %{
 315           "type" => "Image",
 316           "url" => image
 317         }
 318       }
 319     else
 320       %{}
 321     end
 322   end
 323 end