git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/activity_pub.ex

   1 defmodule Pleroma.Web.ActivityPub.ActivityPub do
   2   alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
   3   alias Pleroma.Web.ActivityPub.Transmogrifier
   4   import Ecto.Query
   5   import Pleroma.Web.ActivityPub.Utils
   6   require Logger
   7
   8   @httpoison Application.get_env(:pleroma, :httpoison)
   9
  10   def get_recipients(data) do
  11     (data["to"] || []) ++ (data["cc"] || [])
  12   end
  13
  14   def insert(map, local \\ true) when is_map(map) do
  15     with nil <- Activity.get_by_ap_id(map["id"]),
  16          map <- lazy_put_activity_defaults(map),
  17          :ok <- insert_full_object(map) do
  18       {:ok, activity} = Repo.insert(%Activity{data: map, local: local, actor: map["actor"], recipients: get_recipients(map)})
  19       Notification.create_notifications(activity)
  20       stream_out(activity)
  21       {:ok, activity}
  22     else
  23       %Activity{} = activity -> {:ok, activity}
  24       error -> {:error, error}
  25     end
  26   end
  27
  28   def stream_out(activity) do
  29     if activity.data["type"] in ["Create", "Announce"] do
  30       Pleroma.Web.Streamer.stream("user", activity)
  31       if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") do
  32         Pleroma.Web.Streamer.stream("public", activity)
  33         if activity.local do
  34           Pleroma.Web.Streamer.stream("public:local", activity)
  35         end
  36       end
  37     end
  38   end
  39
  40   def create(%{to: to, actor: actor, context: context, object: object} = params) do
  41     additional = params[:additional] || %{}
  42     local = !(params[:local] == false) # only accept false as false value
  43     published = params[:published]
  44
  45     with create_data <- make_create_data(%{to: to, actor: actor, published: published, context: context, object: object}, additional),
  46          {:ok, activity} <- insert(create_data, local),
  47          :ok <- maybe_federate(activity) do
  48       {:ok, activity}
  49     end
  50   end
  51
  52   # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
  53   def like(%User{ap_id: ap_id} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
  54     with nil <- get_existing_like(ap_id, object),
  55          like_data <- make_like_data(user, object, activity_id),
  56          {:ok, activity} <- insert(like_data, local),
  57          {:ok, object} <- add_like_to_object(activity, object),
  58          :ok <- maybe_federate(activity) do
  59       {:ok, activity, object}
  60     else
  61       %Activity{} = activity -> {:ok, activity, object}
  62       error -> {:error, error}
  63     end
  64   end
  65
  66   def unlike(%User{} = actor, %Object{} = object) do
  67     with %Activity{} = activity <- get_existing_like(actor.ap_id, object),
  68          {:ok, _activity} <- Repo.delete(activity),
  69          {:ok, object} <- remove_like_from_object(activity, object) do
  70       {:ok, object}
  71       else _e -> {:ok, object}
  72     end
  73   end
  74
  75   def announce(%User{ap_id: _} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
  76     with announce_data <- make_announce_data(user, object, activity_id),
  77          {:ok, activity} <- insert(announce_data, local),
  78          {:ok, object} <- add_announce_to_object(activity, object),
  79          :ok <- maybe_federate(activity) do
  80       {:ok, activity, object}
  81     else
  82       error -> {:error, error}
  83     end
  84   end
  85
  86   def follow(follower, followed, activity_id \\ nil, local \\ true) do
  87     with data <- make_follow_data(follower, followed, activity_id),
  88          {:ok, activity} <- insert(data, local),
  89          :ok <- maybe_federate(activity) do
  90       {:ok, activity}
  91     end
  92   end
  93
  94   def unfollow(follower, followed, local \\ true) do
  95     with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
  96          unfollow_data <- make_unfollow_data(follower, followed, follow_activity),
  97          {:ok, activity} <- insert(unfollow_data, local),
  98          :ok, maybe_federate(activity) do
  99       {:ok, activity}
 100     end
 101   end
 102
 103   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
 104     user = User.get_cached_by_ap_id(actor)
 105     data = %{
 106       "type" => "Delete",
 107       "actor" => actor,
 108       "object" => id,
 109       "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
 110     }
 111     with Repo.delete(object),
 112          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
 113          {:ok, activity} <- insert(data, local),
 114          :ok <- maybe_federate(activity) do
 115       {:ok, activity}
 116     end
 117   end
 118
 119   def fetch_activities_for_context(context, opts \\ %{}) do
 120     query = from activity in Activity,
 121       where: fragment("?->>'type' = ? and ?->>'context' = ?", activity.data, "Create", activity.data, ^context),
 122       order_by: [desc: :id]
 123     query = restrict_blocked(query, opts)
 124     Repo.all(query)
 125   end
 126
 127   def fetch_public_activities(opts \\ %{}) do
 128     public = ["https://www.w3.org/ns/activitystreams#Public"]
 129     fetch_activities(public, opts)
 130   end
 131
 132   defp restrict_since(query, %{"since_id" => since_id}) do
 133     from activity in query, where: activity.id > ^since_id
 134   end
 135   defp restrict_since(query, _), do: query
 136
 137   defp restrict_tag(query, %{"tag" => tag}) do
 138     from activity in query,
 139       where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
 140   end
 141   defp restrict_tag(query, _), do: query
 142
 143   defp restrict_recipients(query, []), do: query
 144   defp restrict_recipients(query, recipients) do
 145     from activity in query,
 146      where: fragment("? && ?", ^recipients, activity.recipients)
 147   end
 148
 149   defp restrict_local(query, %{"local_only" => true}) do
 150     from activity in query, where: activity.local == true
 151   end
 152   defp restrict_local(query, _), do: query
 153
 154   defp restrict_max(query, %{"max_id" => max_id}) do
 155     from activity in query, where: activity.id < ^max_id
 156   end
 157   defp restrict_max(query, _), do: query
 158
 159   defp restrict_actor(query, %{"actor_id" => actor_id}) do
 160     from activity in query,
 161       where: activity.actor == ^actor_id
 162   end
 163   defp restrict_actor(query, _), do: query
 164
 165   defp restrict_type(query, %{"type" => type}) when is_binary(type) do
 166     restrict_type(query, %{"type" => [type]})
 167   end
 168   defp restrict_type(query, %{"type" => type}) do
 169     from activity in query,
 170       where: fragment("?->>'type' = ANY(?)", activity.data, ^type)
 171   end
 172   defp restrict_type(query, _), do: query
 173
 174   defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
 175     from activity in query,
 176       where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
 177   end
 178   defp restrict_favorited_by(query, _), do: query
 179
 180   defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
 181     from activity in query,
 182       where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
 183   end
 184   defp restrict_media(query, _), do: query
 185
 186   # Only search through last 100_000 activities by default
 187   defp restrict_recent(query, %{"whole_db" => true}), do: query
 188   defp restrict_recent(query, _) do
 189     since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
 190
 191     from activity in query,
 192       where: activity.id > ^since
 193   end
 194
 195   defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
 196     blocks = info["blocks"] || []
 197     from activity in query,
 198       where: fragment("not (? = ANY(?))", activity.actor, ^blocks)
 199   end
 200   defp restrict_blocked(query, _), do: query
 201
 202   def fetch_activities(recipients, opts \\ %{}) do
 203     base_query = from activity in Activity,
 204       limit: 20,
 205       order_by: [fragment("? desc nulls last", activity.id)]
 206
 207     base_query
 208     |> restrict_recipients(recipients)
 209     |> restrict_tag(opts)
 210     |> restrict_since(opts)
 211     |> restrict_local(opts)
 212     |> restrict_max(opts)
 213     |> restrict_actor(opts)
 214     |> restrict_type(opts)
 215     |> restrict_favorited_by(opts)
 216     |> restrict_recent(opts)
 217     |> restrict_blocked(opts)
 218     |> restrict_media(opts)
 219     |> Repo.all
 220     |> Enum.reverse
 221   end
 222
 223   def upload(file) do
 224     data = Upload.store(file)
 225     Repo.insert(%Object{data: data})
 226   end
 227
 228   def make_user_from_ap_id(ap_id) do
 229     with {:ok, %{status_code: 200, body: body}} <- @httpoison.get(ap_id, ["Accept": "application/activity+json"]),
 230     {:ok, data} <- Poison.decode(body)
 231       do
 232       user_data = %{
 233         ap_id: data["id"],
 234         info: %{
 235           "ap_enabled" => true,
 236           "source_data" => data
 237         },
 238         nickname: "#{data["preferredUsername"]}@#{URI.parse(ap_id).host}",
 239         name: data["name"]
 240       }
 241
 242       User.insert_or_update_user(user_data)
 243     end
 244   end
 245
 246   def publish(actor, activity) do
 247     remote_users = Pleroma.Web.Salmon.remote_users(activity)
 248     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 249     Enum.each remote_users, fn(user) ->
 250       if user.info["ap_enabled"] do
 251         inbox = user.info["source_data"]["inbox"]
 252         Logger.info("Federating #{activity.data["id"]} to #{inbox}")
 253         host = URI.parse(inbox).host
 254         signature = Pleroma.Web.HTTPSignatures.sign(actor, %{host: host})
 255         @httpoison.post(inbox, Poison.encode!(data), [{"Content-Type", "application/activity+json"}, {"signature", signature}])
 256       end
 257     end
 258   end
 259 end