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

   1 defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
   2   alias Pleroma.{User, Activity, Repo, Object}
   3   alias Pleroma.Web.ActivityPub.ActivityPub
   4   alias Pleroma.Web.TwitterAPI.Representers.{ActivityRepresenter, UserRepresenter}
   5
   6   import Ecto.Query
   7
   8   def to_for_user_and_mentions(user, mentions) do
   9     default_to = [
  10       User.ap_followers(user),
  11       "https://www.w3.org/ns/activitystreams#Public"
  12     ]
  13
  14     default_to ++ Enum.map(mentions, fn ({_, %{ap_id: ap_id}}) -> ap_id end)
  15   end
  16
  17   def format_input(text, mentions) do
  18     HtmlSanitizeEx.strip_tags(text)
  19     |> String.replace("\n", "<br>")
  20     |> add_user_links(mentions)
  21   end
  22
  23   def attachments_from_ids(ids) do
  24     Enum.map(ids || [], fn (media_id) ->
  25       Repo.get(Object, media_id).data
  26     end)
  27   end
  28
  29   def get_replied_to_activity(id) when not is_nil(id) do
  30     Repo.get(Activity, id)
  31   end
  32
  33   def get_replied_to_activity(_), do: nil
  34
  35   def create_status(user = %User{}, data = %{"status" => status}) do
  36     attachments = attachments_from_ids(data["media_ids"])
  37     context = ActivityPub.generate_context_id
  38     mentions = parse_mentions(status)
  39     content_html = format_input(status, mentions)
  40     to = to_for_user_and_mentions(user, mentions)
  41     date = make_date()
  42
  43     inReplyTo = get_replied_to_activity(data["in_reply_to_status_id"])
  44
  45     # Wire up reply info.
  46     [to, context, object, additional] =
  47       if inReplyTo do
  48       context = inReplyTo.data["context"]
  49       to = to ++ [inReplyTo.data["actor"]]
  50
  51       object = %{
  52         "type" => "Note",
  53         "to" => to,
  54         "content" => content_html,
  55         "published" => date,
  56         "context" => context,
  57         "attachment" => attachments,
  58         "actor" => user.ap_id,
  59         "inReplyTo" => inReplyTo.data["object"]["id"],
  60         "inReplyToStatusId" => inReplyTo.id,
  61         "statusnetConversationId" => inReplyTo.data["statusnetConversationId"]
  62       }
  63       additional = %{
  64         "statusnetConversationId" => inReplyTo.data["statusnetConversationId"]
  65       }
  66
  67       [to, context, object, additional]
  68       else
  69       object = %{
  70         "type" => "Note",
  71         "to" => to,
  72         "content" => content_html,
  73         "published" => date,
  74         "context" => context,
  75         "attachment" => attachments,
  76         "actor" => user.ap_id
  77       }
  78       [to, context, object, %{}]
  79     end
  80
  81     ActivityPub.create(to, user, context, object, additional, data)
  82   end
  83
  84   def fetch_friend_statuses(user, opts \\ %{}) do
  85     ActivityPub.fetch_activities([user.ap_id | user.following], opts)
  86     |> activities_to_statuses(%{for: user})
  87   end
  88
  89   def fetch_public_statuses(user, opts \\ %{}) do
  90     ActivityPub.fetch_public_activities(opts)
  91     |> activities_to_statuses(%{for: user})
  92   end
  93
  94   def fetch_user_statuses(user, opts \\ %{}) do
  95     ActivityPub.fetch_activities([], opts)
  96     |> activities_to_statuses(%{for: user})
  97   end
  98
  99   def fetch_mentions(user, opts \\ %{}) do
 100     ActivityPub.fetch_activities([user.ap_id], opts)
 101     |> activities_to_statuses(%{for: user})
 102   end
 103
 104   def fetch_conversation(user, id) do
 105     with context when is_binary(context) <- conversation_id_to_context(id),
 106          activities <- ActivityPub.fetch_activities_for_context(context),
 107          statuses <- activities |> activities_to_statuses(%{for: user})
 108     do
 109       statuses
 110     else e ->
 111       IO.inspect(e)
 112       []
 113     end
 114   end
 115
 116   def fetch_status(user, id) do
 117     with %Activity{} = activity <- Repo.get(Activity, id) do
 118       activity_to_status(activity, %{for: user})
 119     end
 120   end
 121
 122   def follow(%User{} = follower, params) do
 123     with { :ok, %User{} = followed } <- get_user(params),
 124          { :ok, follower } <- User.follow(follower, followed),
 125          { :ok, activity } <- ActivityPub.insert(%{
 126            "type" => "Follow",
 127            "actor" => follower.ap_id,
 128            "object" => followed.ap_id,
 129            "published" => make_date()
 130          })
 131     do
 132       { :ok, follower, followed, activity }
 133     else
 134       err -> err
 135     end
 136   end
 137
 138   def unfollow(%User{} = follower, params) do
 139     with { :ok, %User{} = unfollowed } <- get_user(params),
 140          { :ok, follower } <- User.unfollow(follower, unfollowed)
 141     do
 142       { :ok, follower, unfollowed}
 143     else
 144       err -> err
 145     end
 146   end
 147
 148   def favorite(%User{} = user, %Activity{data: %{"object" => object}} = activity) do
 149     object = Object.get_by_ap_id(object["id"])
 150
 151     {:ok, _like_activity, object} = ActivityPub.like(user, object)
 152     new_data = activity.data
 153     |> Map.put("object", object.data)
 154
 155     status = %{activity | data: new_data}
 156     |> activity_to_status(%{for: user})
 157
 158     {:ok, status}
 159   end
 160
 161   def unfavorite(%User{} = user, %Activity{data: %{"object" => object}} = activity) do
 162     object = Object.get_by_ap_id(object["id"])
 163
 164     {:ok, object} = ActivityPub.unlike(user, object)
 165     new_data = activity.data
 166     |> Map.put("object", object.data)
 167
 168     status = %{activity | data: new_data}
 169     |> activity_to_status(%{for: user})
 170
 171     {:ok, status}
 172   end
 173
 174   def retweet(%User{} = user, %Activity{data: %{"object" => object}} = activity) do
 175     object = Object.get_by_ap_id(object["id"])
 176
 177     {:ok, _announce_activity, object} = ActivityPub.announce(user, object)
 178     new_data = activity.data
 179     |> Map.put("object", object.data)
 180
 181     status = %{activity | data: new_data}
 182     |> activity_to_status(%{for: user})
 183
 184     {:ok, status}
 185   end
 186
 187   def upload(%Plug.Upload{} = file, format \\ "xml") do
 188     {:ok, object} = ActivityPub.upload(file)
 189
 190     url = List.first(object.data["url"])
 191     href = url["href"]
 192     type = url["mediaType"]
 193
 194     case format do
 195       "xml" ->
 196         # Fake this as good as possible...
 197         """
 198         <?xml version="1.0" encoding="UTF-8"?>
 199         <rsp stat="ok" xmlns:atom="http://www.w3.org/2005/Atom">
 200         <mediaid>#{object.id}</mediaid>
 201         <media_id>#{object.id}</media_id>
 202         <media_id_string>#{object.id}</media_id_string>
 203         <media_url>#{href}</media_url>
 204         <mediaurl>#{href}</mediaurl>
 205         <atom:link rel="enclosure" href="#{href}" type="#{type}"></atom:link>
 206         </rsp>
 207         """
 208       "json" ->
 209         %{
 210           media_id: object.id,
 211           media_id_string: "#{object.id}}",
 212           media_url: href,
 213           size: 0
 214         } |> Poison.encode!
 215     end
 216   end
 217
 218   def parse_mentions(text) do
 219     # Modified from https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
 220     regex = ~r/@[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@?[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*/
 221
 222     Regex.scan(regex, text)
 223     |> List.flatten
 224     |> Enum.uniq
 225     |> Enum.map(fn ("@" <> match = full_match) -> {full_match, User.get_cached_by_nickname(match)} end)
 226     |> Enum.filter(fn ({_match, user}) -> user end)
 227   end
 228
 229   def add_user_links(text, mentions) do
 230     Enum.reduce(mentions, text, fn ({match, %User{ap_id: ap_id}}, text) -> String.replace(text, match, "<a href='#{ap_id}'>#{match}</a>") end)
 231   end
 232
 233   def register_user(params) do
 234     params = %{
 235       nickname: params["nickname"],
 236       name: params["fullname"],
 237       bio: params["bio"],
 238       email: params["email"],
 239       password: params["password"],
 240       password_confirmation: params["confirm"]
 241     }
 242
 243     changeset = User.register_changeset(%User{}, params)
 244
 245     with {:ok, user} <- Repo.insert(changeset) do
 246       {:ok, UserRepresenter.to_map(user)}
 247     else
 248       {:error, changeset} ->
 249         errors = Ecto.Changeset.traverse_errors(changeset, fn {msg, _opts} -> msg end)
 250       |> Poison.encode!
 251       {:error, %{error: errors}}
 252     end
 253   end
 254
 255   def get_user(user \\ nil, params) do
 256     case params do
 257       %{ "user_id" => user_id } ->
 258         case target = Repo.get(User, user_id) do
 259           nil ->
 260             {:error, "No user with such user_id"}
 261           _ ->
 262             {:ok, target}
 263         end
 264       %{ "screen_name" => nickname } ->
 265         case target = Repo.get_by(User, nickname: nickname) do
 266           nil ->
 267             {:error, "No user with such screen_name"}
 268           _ ->
 269             {:ok, target}
 270         end
 271       _ ->
 272         if user do
 273           {:ok, user}
 274         else
 275           {:error, "You need to specify screen_name or user_id"}
 276         end
 277     end
 278   end
 279
 280   defp activities_to_statuses(activities, opts) do
 281     Enum.map(activities, fn(activity) ->
 282       activity_to_status(activity, opts)
 283     end)
 284   end
 285
 286   # For likes, fetch the liked activity, too.
 287   defp activity_to_status(%Activity{data: %{"type" => "Like"}} = activity, opts) do
 288     actor = get_in(activity.data, ["actor"])
 289     user = User.get_cached_by_ap_id(actor)
 290     [liked_activity] = Activity.all_by_object_ap_id(activity.data["object"])
 291
 292     ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user, liked_activity: liked_activity}))
 293   end
 294
 295   # For announces, fetch the announced activity and the user.
 296   defp activity_to_status(%Activity{data: %{"type" => "Announce"}} = activity, opts) do
 297     actor = get_in(activity.data, ["actor"])
 298     user = User.get_cached_by_ap_id(actor)
 299     [announced_activity] = Activity.all_by_object_ap_id(activity.data["object"])
 300     announced_actor = User.get_cached_by_ap_id(announced_activity.data["actor"])
 301
 302     ActivityRepresenter.to_map(activity, Map.merge(opts, %{users: [user, announced_actor], announced_activity: announced_activity}))
 303   end
 304
 305   defp activity_to_status(activity, opts) do
 306     actor = get_in(activity.data, ["actor"])
 307     user = User.get_cached_by_ap_id(actor)
 308     # mentioned_users = Repo.all(from user in User, where: user.ap_id in ^activity.data["to"])
 309     mentioned_users = Enum.map(activity.data["to"] || [], fn (ap_id) ->
 310       User.get_cached_by_ap_id(ap_id)
 311     end)
 312     |> Enum.filter(&(&1))
 313
 314     ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user, mentioned: mentioned_users}))
 315   end
 316
 317   defp make_date do
 318     DateTime.utc_now() |> DateTime.to_iso8601
 319   end
 320
 321   def context_to_conversation_id(context) do
 322     with %Object{id: id} <- Object.get_by_ap_id(context) do
 323       id
 324     else _e ->
 325       changeset = Object.context_mapping(context)
 326       {:ok, %{id: id}} = Repo.insert(changeset)
 327       id
 328     end
 329   end
 330
 331   def conversation_id_to_context(id) do
 332     with %Object{data: %{"id" => context}} <- Repo.get(Object, id) do
 333       context
 334     else _e ->
 335       {:error, "No such conversation"}
 336     end
 337   end
 338 end