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-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.CommonAPI do
- alias Pleroma.Activity
- alias Pleroma.ActivityExpiration
- alias Pleroma.Conversation.Participation
- alias Pleroma.Formatter
- alias Pleroma.Object
- alias Pleroma.ThreadMute
- alias Pleroma.User
- alias Pleroma.UserRelationship
- alias Pleroma.Web.ActivityPub.ActivityPub
- alias Pleroma.Web.ActivityPub.Builder
- alias Pleroma.Web.ActivityPub.Pipeline
- alias Pleroma.Web.ActivityPub.Utils
- alias Pleroma.Web.ActivityPub.Visibility
-
- import Pleroma.Web.Gettext
- import Pleroma.Web.CommonAPI.Utils
-
- require Pleroma.Constants
- require Logger
-
- def block(blocker, blocked) do
- with {:ok, block_data, _} <- Builder.block(blocker, blocked),
- {:ok, block, _} <- Pipeline.common_pipeline(block_data, local: true) do
- {:ok, block}
- end
- end
-
- def post_chat_message(%User{} = user, %User{} = recipient, content, opts \\ []) do
- with maybe_attachment <- opts[:media_id] && Object.get_by_id(opts[:media_id]),
- :ok <- validate_chat_content_length(content, !!maybe_attachment),
- {_, {:ok, chat_message_data, _meta}} <-
- {:build_object,
- Builder.chat_message(
- user,
- recipient.ap_id,
- content |> format_chat_content,
- attachment: maybe_attachment
- )},
- {_, {:ok, create_activity_data, _meta}} <-
- {:build_create_activity, Builder.create(user, chat_message_data, [recipient.ap_id])},
- {_, {:ok, %Activity{} = activity, _meta}} <-
- {:common_pipeline,
- Pipeline.common_pipeline(create_activity_data,
- local: true
- )} do
- {:ok, activity}
- else
- {:common_pipeline, {:reject, _} = e} -> e
- e -> e
- end
- end
-
- defp format_chat_content(nil), do: nil
-
- defp format_chat_content(content) do
- {text, _, _} =
- content
- |> Formatter.html_escape("text/plain")
- |> Formatter.linkify()
- |> (fn {text, mentions, tags} ->
- {String.replace(text, ~r/\r?\n/, "<br>"), mentions, tags}
- end).()
-
- text
- end
-
- defp validate_chat_content_length(_, true), do: :ok
- defp validate_chat_content_length(nil, false), do: {:error, :no_content}
-
- defp validate_chat_content_length(content, _) do
- if String.length(content) <= Pleroma.Config.get([:instance, :chat_limit]) do
- :ok
- else
- {:error, :content_too_long}
- end
- end
-
- def unblock(blocker, blocked) do
- with {_, %Activity{} = block} <- {:fetch_block, Utils.fetch_latest_block(blocker, blocked)},
- {:ok, unblock_data, _} <- Builder.undo(blocker, block),
- {:ok, unblock, _} <- Pipeline.common_pipeline(unblock_data, local: true) do
- {:ok, unblock}
- else
- {:fetch_block, nil} ->
- if User.blocks?(blocker, blocked) do
- User.unblock(blocker, blocked)
- {:ok, :no_activity}
- else
- {:error, :not_blocking}
- end
-
- e ->
- e
- end
- end
-
- def follow(follower, followed) do
- timeout = Pleroma.Config.get([:activitypub, :follow_handshake_timeout])
-
- with {:ok, follow_data, _} <- Builder.follow(follower, followed),
- {:ok, activity, _} <- Pipeline.common_pipeline(follow_data, local: true),
- {:ok, follower, followed} <- User.wait_and_refresh(timeout, follower, followed) do
- if activity.data["state"] == "reject" do
- {:error, :rejected}
- else
- {:ok, follower, followed, activity}
- end
- end
- end
-
- def unfollow(follower, unfollowed) do
- with {:ok, follower, _follow_activity} <- User.unfollow(follower, unfollowed),
- {:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed),
- {:ok, _subscription} <- User.unsubscribe(follower, unfollowed) do
- {:ok, follower}
- end
- end
-
- def accept_follow_request(follower, followed) do
- with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
- {:ok, accept_data, _} <- Builder.accept(followed, follow_activity),
- {:ok, _activity, _} <- Pipeline.common_pipeline(accept_data, local: true) do
- {:ok, follower}
- end
- end
-
- def reject_follow_request(follower, followed) do
- with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
- {:ok, reject_data, _} <- Builder.reject(followed, follow_activity),
- {:ok, _activity, _} <- Pipeline.common_pipeline(reject_data, local: true) do
- {:ok, follower}
- end
- end
-
- def delete(activity_id, user) do
- with {_, %Activity{data: %{"object" => _, "type" => "Create"}} = activity} <-
- {:find_activity, Activity.get_by_id(activity_id)},
- {_, %Object{} = object, _} <-
- {:find_object, Object.normalize(activity, false), activity},
- true <- User.superuser?(user) || user.ap_id == object.data["actor"],
- {:ok, delete_data, _} <- Builder.delete(user, object.data["id"]),
- {:ok, delete, _} <- Pipeline.common_pipeline(delete_data, local: true) do
- {:ok, delete}
- else
- {:find_activity, _} ->
- {:error, :not_found}
-
- {:find_object, nil, %Activity{data: %{"actor" => actor, "object" => object}}} ->
- # We have the create activity, but not the object, it was probably pruned.
- # Insert a tombstone and try again
- with {:ok, tombstone_data, _} <- Builder.tombstone(actor, object),
- {:ok, _tombstone} <- Object.create(tombstone_data) do
- delete(activity_id, user)
- else
- _ ->
- Logger.error(
- "Could not insert tombstone for missing object on deletion. Object is #{object}."
- )
-
- {:error, dgettext("errors", "Could not delete")}
- end
-
- _ ->
- {:error, dgettext("errors", "Could not delete")}
- end
- end
-
- def repeat(id, user, params \\ %{}) do
- with %Activity{data: %{"type" => "Create"}} = activity <- Activity.get_by_id(id),
- object = %Object{} <- Object.normalize(activity, false),
- {_, nil} <- {:existing_announce, Utils.get_existing_announce(user.ap_id, object)},
- public = public_announce?(object, params),
- {:ok, announce, _} <- Builder.announce(user, object, public: public),
- {:ok, activity, _} <- Pipeline.common_pipeline(announce, local: true) do
- {:ok, activity}
- else
- {:existing_announce, %Activity{} = announce} ->
- {:ok, announce}
-
- _ ->
- {:error, :not_found}
- end
- end
-
- def unrepeat(id, user) do
- with {_, %Activity{data: %{"type" => "Create"}} = activity} <-
- {:find_activity, Activity.get_by_id(id)},
- %Object{} = note <- Object.normalize(activity, false),
- %Activity{} = announce <- Utils.get_existing_announce(user.ap_id, note),
- {:ok, undo, _} <- Builder.undo(user, announce),
- {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
- {:ok, activity}
- else
- {:find_activity, _} -> {:error, :not_found}
- _ -> {:error, dgettext("errors", "Could not unrepeat")}
- end
- end
-
- @spec favorite(User.t(), binary()) :: {:ok, Activity.t() | :already_liked} | {:error, any()}
- def favorite(%User{} = user, id) do
- case favorite_helper(user, id) do
- {:ok, _} = res ->
- res
-
- {:error, :not_found} = res ->
- res
-
- {:error, e} ->
- Logger.error("Could not favorite #{id}. Error: #{inspect(e, pretty: true)}")
- {:error, dgettext("errors", "Could not favorite")}
- end
- end
-
- def favorite_helper(user, id) do
- with {_, %Activity{object: object}} <- {:find_object, Activity.get_by_id_with_object(id)},
- {_, {:ok, like_object, meta}} <- {:build_object, Builder.like(user, object)},
- {_, {:ok, %Activity{} = activity, _meta}} <-
- {:common_pipeline,
- Pipeline.common_pipeline(like_object, Keyword.put(meta, :local, true))} do
- {:ok, activity}
- else
- {:find_object, _} ->
- {:error, :not_found}
-
- {:common_pipeline,
- {
- :error,
- {
- :validate_object,
- {
- :error,
- changeset
- }
- }
- }} = e ->
- if {:object, {"already liked by this actor", []}} in changeset.errors do
- {:ok, :already_liked}
- else
- {:error, e}
- end
-
- e ->
- {:error, e}
- end
- end
-
- def unfavorite(id, user) do
- with {_, %Activity{data: %{"type" => "Create"}} = activity} <-
- {:find_activity, Activity.get_by_id(id)},
- %Object{} = note <- Object.normalize(activity, false),
- %Activity{} = like <- Utils.get_existing_like(user.ap_id, note),
- {:ok, undo, _} <- Builder.undo(user, like),
- {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
- {:ok, activity}
- else
- {:find_activity, _} -> {:error, :not_found}
- _ -> {:error, dgettext("errors", "Could not unfavorite")}
- end
- end
-
- def react_with_emoji(id, user, emoji) do
- with %Activity{} = activity <- Activity.get_by_id(id),
- object <- Object.normalize(activity),
- {:ok, emoji_react, _} <- Builder.emoji_react(user, object, emoji),
- {:ok, activity, _} <- Pipeline.common_pipeline(emoji_react, local: true) do
- {:ok, activity}
- else
- _ ->
- {:error, dgettext("errors", "Could not add reaction emoji")}
- end
- end
-
- def unreact_with_emoji(id, user, emoji) do
- with %Activity{} = reaction_activity <- Utils.get_latest_reaction(id, user, emoji),
- {:ok, undo, _} <- Builder.undo(user, reaction_activity),
- {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
- {:ok, activity}
- else
- _ ->
- {:error, dgettext("errors", "Could not remove reaction emoji")}
- end
- end
-
- def vote(user, %{data: %{"type" => "Question"}} = object, choices) do
- with :ok <- validate_not_author(object, user),
- :ok <- validate_existing_votes(user, object),
- {:ok, options, choices} <- normalize_and_validate_choices(choices, object) do
- answer_activities =
- Enum.map(choices, fn index ->
- {:ok, answer_object, _meta} =
- Builder.answer(user, object, Enum.at(options, index)["name"])
-
- {:ok, activity_data, _meta} = Builder.create(user, answer_object, [])
-
- {:ok, activity, _meta} =
- activity_data
- |> Map.put("cc", answer_object["cc"])
- |> Map.put("context", answer_object["context"])
- |> Pipeline.common_pipeline(local: true)
-
- # TODO: Do preload of Pleroma.Object in Pipeline
- Activity.normalize(activity.data)
- end)
-
- object = Object.get_cached_by_ap_id(object.data["id"])
- {:ok, answer_activities, object}
- end
- end
-
- defp validate_not_author(%{data: %{"actor" => ap_id}}, %{ap_id: ap_id}),
- do: {:error, dgettext("errors", "Poll's author can't vote")}
-
- defp validate_not_author(_, _), do: :ok
-
- defp validate_existing_votes(%{ap_id: ap_id}, object) do
- if Utils.get_existing_votes(ap_id, object) == [] do
- :ok
- else
- {:error, dgettext("errors", "Already voted")}
- end
- end
-
- defp get_options_and_max_count(%{data: %{"anyOf" => any_of}})
- when is_list(any_of) and any_of != [],
- do: {any_of, Enum.count(any_of)}
-
- defp get_options_and_max_count(%{data: %{"oneOf" => one_of}})
- when is_list(one_of) and one_of != [],
- do: {one_of, 1}
-
- defp normalize_and_validate_choices(choices, object) do
- choices = Enum.map(choices, fn i -> if is_binary(i), do: String.to_integer(i), else: i end)
- {options, max_count} = get_options_and_max_count(object)
- count = Enum.count(options)
-
- with {_, true} <- {:valid_choice, Enum.all?(choices, &(&1 < count))},
- {_, true} <- {:count_check, Enum.count(choices) <= max_count} do
- {:ok, options, choices}
- else
- {:valid_choice, _} -> {:error, dgettext("errors", "Invalid indices")}
- {:count_check, _} -> {:error, dgettext("errors", "Too many choices")}
- end
- end
-
- def public_announce?(_, %{visibility: visibility})
- when visibility in ~w{public unlisted private direct},
- do: visibility in ~w(public unlisted)
-
- def public_announce?(object, _) do
- Visibility.is_public?(object)
- end
-
- def get_visibility(_, _, %Participation{}), do: {"direct", "direct"}
-
- def get_visibility(%{visibility: visibility}, in_reply_to, _)
- when visibility in ~w{public unlisted private direct},
- do: {visibility, get_replied_to_visibility(in_reply_to)}
-
- def get_visibility(%{visibility: "list:" <> list_id}, in_reply_to, _) do
- visibility = {:list, String.to_integer(list_id)}
- {visibility, get_replied_to_visibility(in_reply_to)}
- end
-
- def get_visibility(_, in_reply_to, _) when not is_nil(in_reply_to) do
- visibility = get_replied_to_visibility(in_reply_to)
- {visibility, visibility}
- end
-
- def get_visibility(_, in_reply_to, _), do: {"public", get_replied_to_visibility(in_reply_to)}
-
- def get_replied_to_visibility(nil), do: nil
-
- def get_replied_to_visibility(activity) do
- with %Object{} = object <- Object.normalize(activity) do
- Visibility.get_visibility(object)
- end
- end
-
- def check_expiry_date({:ok, nil} = res), do: res
-
- def check_expiry_date({:ok, in_seconds}) do
- expiry = NaiveDateTime.utc_now() |> NaiveDateTime.add(in_seconds)
-
- if ActivityExpiration.expires_late_enough?(expiry) do
- {:ok, expiry}
- else
- {:error, "Expiry date is too soon"}
- end
- end
-
- def check_expiry_date(expiry_str) do
- Ecto.Type.cast(:integer, expiry_str)
- |> check_expiry_date()
- end
-
- def listen(user, data) do
- visibility = Map.get(data, :visibility, "public")
-
- with {to, cc} <- get_to_and_cc(user, [], nil, visibility, nil),
- listen_data <-
- data
- |> Map.take([:album, :artist, :title, :length])
- |> Map.new(fn {key, value} -> {to_string(key), value} end)
- |> Map.put("type", "Audio")
- |> Map.put("to", to)
- |> Map.put("cc", cc)
- |> Map.put("actor", user.ap_id),
- {:ok, activity} <-
- ActivityPub.listen(%{
- actor: user,
- to: to,
- object: listen_data,
- context: Utils.generate_context_id(),
- additional: %{"cc" => cc}
- }) do
- {:ok, activity}
- end
- end
-
- def post(user, %{status: _} = data) do
- with {:ok, draft} <- Pleroma.Web.CommonAPI.ActivityDraft.create(user, data) do
- ActivityPub.create(draft.changes, draft.preview?)
- end
- end
-
- def pin(id, %{ap_id: user_ap_id} = user) do
- with %Activity{
- actor: ^user_ap_id,
- data: %{"type" => "Create"},
- object: %Object{data: %{"type" => object_type}}
- } = activity <- Activity.get_by_id_with_object(id),
- true <- object_type in ["Note", "Article", "Question"],
- true <- Visibility.is_public?(activity),
- {:ok, _user} <- User.add_pinnned_activity(user, activity) do
- {:ok, activity}
- else
- {:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
- _ -> {:error, dgettext("errors", "Could not pin")}
- end
- end
-
- def unpin(id, user) do
- with %Activity{data: %{"type" => "Create"}} = activity <- Activity.get_by_id(id),
- {:ok, _user} <- User.remove_pinnned_activity(user, activity) do
- {:ok, activity}
- else
- {:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
- _ -> {:error, dgettext("errors", "Could not unpin")}
- end
- end
-
- def add_mute(user, activity) do
- with {:ok, _} <- ThreadMute.add_mute(user.id, activity.data["context"]) do
- {:ok, activity}
- else
- {:error, _} -> {:error, dgettext("errors", "conversation is already muted")}
- end
- end
-
- def remove_mute(user, activity) do
- ThreadMute.remove_mute(user.id, activity.data["context"])
- {:ok, activity}
- end
-
- def thread_muted?(%User{id: user_id}, %{data: %{"context" => context}})
- when is_binary(context) do
- ThreadMute.exists?(user_id, context)
- end
-
- def thread_muted?(_, _), do: false
-
- def report(user, data) do
- with {:ok, account} <- get_reported_account(data.account_id),
- {:ok, {content_html, _, _}} <- make_report_content_html(data[:comment]),
- {:ok, statuses} <- get_report_statuses(account, data) do
- ActivityPub.flag(%{
- context: Utils.generate_context_id(),
- actor: user,
- account: account,
- statuses: statuses,
- content: content_html,
- forward: Map.get(data, :forward, false)
- })
- end
- end
-
- defp get_reported_account(account_id) do
- case User.get_cached_by_id(account_id) do
- %User{} = account -> {:ok, account}
- _ -> {:error, dgettext("errors", "Account not found")}
- end
- end
-
- def update_report_state(activity_ids, state) when is_list(activity_ids) do
- case Utils.update_report_state(activity_ids, state) do
- :ok -> {:ok, activity_ids}
- _ -> {:error, dgettext("errors", "Could not update state")}
- end
- end
-
- def update_report_state(activity_id, state) do
- with %Activity{} = activity <- Activity.get_by_id(activity_id) do
- Utils.update_report_state(activity, state)
- else
- nil -> {:error, :not_found}
- _ -> {:error, dgettext("errors", "Could not update state")}
- end
- end
-
- def update_activity_scope(activity_id, opts \\ %{}) do
- with %Activity{} = activity <- Activity.get_by_id_with_object(activity_id),
- {:ok, activity} <- toggle_sensitive(activity, opts) do
- set_visibility(activity, opts)
- else
- nil -> {:error, :not_found}
- {:error, reason} -> {:error, reason}
- end
- end
-
- defp toggle_sensitive(activity, %{sensitive: sensitive}) when sensitive in ~w(true false) do
- toggle_sensitive(activity, %{sensitive: String.to_existing_atom(sensitive)})
- end
-
- defp toggle_sensitive(%Activity{object: object} = activity, %{sensitive: sensitive})
- when is_boolean(sensitive) do
- new_data = Map.put(object.data, "sensitive", sensitive)
-
- {:ok, object} =
- object
- |> Object.change(%{data: new_data})
- |> Object.update_and_set_cache()
-
- {:ok, Map.put(activity, :object, object)}
- end
-
- defp toggle_sensitive(activity, _), do: {:ok, activity}
-
- defp set_visibility(activity, %{visibility: visibility}) do
- Utils.update_activity_visibility(activity, visibility)
- end
-
- defp set_visibility(activity, _), do: {:ok, activity}
-
- def hide_reblogs(%User{} = user, %User{} = target) do
- UserRelationship.create_reblog_mute(user, target)
- end
-
- def show_reblogs(%User{} = user, %User{} = target) do
- UserRelationship.delete_reblog_mute(user, target)
- end
-end