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   def accept(%{to: to, actor: actor, object: object} = params) do
  53     local = !(params[:local] == false) # only accept false as false value
  54
  55     with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
  56          {:ok, activity} <- insert(data, local),
  57          :ok <- maybe_federate(activity) do
  58       {:ok, activity}
  59     end
  60   end
  61
  62   # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
  63   def like(%User{ap_id: ap_id} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
  64     with nil <- get_existing_like(ap_id, object),
  65          like_data <- make_like_data(user, object, activity_id),
  66          {:ok, activity} <- insert(like_data, local),
  67          {:ok, object} <- add_like_to_object(activity, object),
  68          :ok <- maybe_federate(activity) do
  69       {:ok, activity, object}
  70     else
  71       %Activity{} = activity -> {:ok, activity, object}
  72       error -> {:error, error}
  73     end
  74   end
  75
  76   def unlike(%User{} = actor, %Object{} = object) do
  77     with %Activity{} = activity <- get_existing_like(actor.ap_id, object),
  78          {:ok, _activity} <- Repo.delete(activity),
  79          {:ok, object} <- remove_like_from_object(activity, object) do
  80       {:ok, object}
  81       else _e -> {:ok, object}
  82     end
  83   end
  84
  85   def announce(%User{ap_id: _} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
  86     with announce_data <- make_announce_data(user, object, activity_id),
  87          {:ok, activity} <- insert(announce_data, local),
  88          {:ok, object} <- add_announce_to_object(activity, object),
  89          :ok <- maybe_federate(activity) do
  90       {:ok, activity, object}
  91     else
  92       error -> {:error, error}
  93     end
  94   end
  95
  96   def follow(follower, followed, activity_id \\ nil, local \\ true) do
  97     with data <- make_follow_data(follower, followed, activity_id),
  98          {:ok, activity} <- insert(data, local),
  99          :ok <- maybe_federate(activity) do
 100       {:ok, activity}
 101     end
 102   end
 103
 104   def unfollow(follower, followed, local \\ true) do
 105     with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
 106          unfollow_data <- make_unfollow_data(follower, followed, follow_activity),
 107          {:ok, activity} <- insert(unfollow_data, local),
 108          :ok, maybe_federate(activity) do
 109       {:ok, activity}
 110     end
 111   end
 112
 113   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
 114     user = User.get_cached_by_ap_id(actor)
 115     data = %{
 116       "type" => "Delete",
 117       "actor" => actor,
 118       "object" => id,
 119       "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
 120     }
 121     with Repo.delete(object),
 122          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
 123          {:ok, activity} <- insert(data, local),
 124          :ok <- maybe_federate(activity) do
 125       {:ok, activity}
 126     end
 127   end
 128
 129   def fetch_activities_for_context(context, opts \\ %{}) do
 130     query = from activity in Activity,
 131       where: fragment("?->>'type' = ? and ?->>'context' = ?", activity.data, "Create", activity.data, ^context),
 132       order_by: [desc: :id]
 133     query = restrict_blocked(query, opts)
 134     Repo.all(query)
 135   end
 136
 137   def fetch_public_activities(opts \\ %{}) do
 138     public = ["https://www.w3.org/ns/activitystreams#Public"]
 139     fetch_activities(public, opts)
 140   end
 141
 142   defp restrict_since(query, %{"since_id" => since_id}) do
 143     from activity in query, where: activity.id > ^since_id
 144   end
 145   defp restrict_since(query, _), do: query
 146
 147   defp restrict_tag(query, %{"tag" => tag}) do
 148     from activity in query,
 149       where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
 150   end
 151   defp restrict_tag(query, _), do: query
 152
 153   defp restrict_recipients(query, []), do: query
 154   defp restrict_recipients(query, recipients) do
 155     from activity in query,
 156      where: fragment("? && ?", ^recipients, activity.recipients)
 157   end
 158
 159   defp restrict_local(query, %{"local_only" => true}) do
 160     from activity in query, where: activity.local == true
 161   end
 162   defp restrict_local(query, _), do: query
 163
 164   defp restrict_max(query, %{"max_id" => max_id}) do
 165     from activity in query, where: activity.id < ^max_id
 166   end
 167   defp restrict_max(query, _), do: query
 168
 169   defp restrict_actor(query, %{"actor_id" => actor_id}) do
 170     from activity in query,
 171       where: activity.actor == ^actor_id
 172   end
 173   defp restrict_actor(query, _), do: query
 174
 175   defp restrict_type(query, %{"type" => type}) when is_binary(type) do
 176     restrict_type(query, %{"type" => [type]})
 177   end
 178   defp restrict_type(query, %{"type" => type}) do
 179     from activity in query,
 180       where: fragment("?->>'type' = ANY(?)", activity.data, ^type)
 181   end
 182   defp restrict_type(query, _), do: query
 183
 184   defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
 185     from activity in query,
 186       where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
 187   end
 188   defp restrict_favorited_by(query, _), do: query
 189
 190   defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
 191     from activity in query,
 192       where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
 193   end
 194   defp restrict_media(query, _), do: query
 195
 196   # Only search through last 100_000 activities by default
 197   defp restrict_recent(query, %{"whole_db" => true}), do: query
 198   defp restrict_recent(query, _) do
 199     since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
 200
 201     from activity in query,
 202       where: activity.id > ^since
 203   end
 204
 205   defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
 206     blocks = info["blocks"] || []
 207     from activity in query,
 208       where: fragment("not (? = ANY(?))", activity.actor, ^blocks)
 209   end
 210   defp restrict_blocked(query, _), do: query
 211
 212   def fetch_activities(recipients, opts \\ %{}) do
 213     base_query = from activity in Activity,
 214       limit: 20,
 215       order_by: [fragment("? desc nulls last", activity.id)]
 216
 217     base_query
 218     |> restrict_recipients(recipients)
 219     |> restrict_tag(opts)
 220     |> restrict_since(opts)
 221     |> restrict_local(opts)
 222     |> restrict_max(opts)
 223     |> restrict_actor(opts)
 224     |> restrict_type(opts)
 225     |> restrict_favorited_by(opts)
 226     |> restrict_recent(opts)
 227     |> restrict_blocked(opts)
 228     |> restrict_media(opts)
 229     |> Repo.all
 230     |> Enum.reverse
 231   end
 232
 233   def upload(file) do
 234     data = Upload.store(file)
 235     Repo.insert(%Object{data: data})
 236   end
 237
 238   def make_user_from_ap_id(ap_id) do
 239     with {:ok, %{status_code: 200, body: body}} <- @httpoison.get(ap_id, ["Accept": "application/activity+json"]),
 240     {:ok, data} <- Poison.decode(body)
 241       do
 242       user_data = %{
 243         ap_id: data["id"],
 244         info: %{
 245           "ap_enabled" => true,
 246           "source_data" => data
 247         },
 248         nickname: "#{data["preferredUsername"]}@#{URI.parse(ap_id).host}",
 249         name: data["name"]
 250       }
 251
 252       User.insert_or_update_user(user_data)
 253     end
 254   end
 255
 256   def publish(actor, activity) do
 257     {:ok, followers} = User.get_followers(actor)
 258
 259     remote_inboxes = Pleroma.Web.Salmon.remote_users(activity) ++ followers
 260     |> Enum.filter(fn (user) -> User.ap_enabled?(user) end)
 261     |> Enum.map(fn (%{info: %{"source_data" => data}}) ->
 262       (data["endpoints"] && data["endpoints"]["sharedInbox"]) ||data["inbox"]
 263     end)
 264     |> Enum.uniq
 265
 266     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 267
 268     Enum.each remote_inboxes, fn(inbox) ->
 269       Logger.info("Federating #{activity.data["id"]} to #{inbox}")
 270       host = URI.parse(inbox).host
 271       signature = Pleroma.Web.HTTPSignatures.sign(actor, %{host: host})
 272       @httpoison.post(inbox, Poison.encode!(data), [{"Content-Type", "application/activity+json"}, {"signature", signature}])
 273     end
 274   end
 275
 276   def fetch_object_from_id(id) do
 277     if object = Object.get_cached_by_ap_id(id) do
 278       {:ok, object}
 279     else
 280       with {:ok, %{body: body, status_code: code}} when code in 200..299 <- @httpoison.get(id, [Accept: "application/activity+json"], follow_redirect: true, timeout: 10000, recv_timeout: 20000),
 281            {:ok, data} <- Poison.decode(body),
 282            data <- Transmogrifier.fix_object(data),
 283            %User{} <- User.get_or_fetch_by_ap_id(data["attributedTo"]) do
 284         Object.create(data)
 285       end
 286     end
 287   end
 288 end