mastodon/app/services/post_status_service.rb

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# frozen_string_literal: true
class PostStatusService < BaseService
include Redisable
include LanguagesHelper
MIN_SCHEDULE_OFFSET = 5.minutes.freeze
class UnexpectedMentionsError < StandardError
attr_reader :accounts
def initialize(message, accounts)
super(message)
@accounts = accounts
end
end
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# Post a text status update, fetch and notify remote users mentioned
# @param [Account] account Account from which to post
# @param [Hash] options
# @option [String] :text Message
# @option [Status] :thread Optional status to reply to
# @option [Boolean] :sensitive
# @option [String] :visibility
# @option [String] :spoiler_text
# @option [String] :language
# @option [String] :scheduled_at
# @option [Hash] :poll Optional poll to attach
# @option [Enumerable] :media_ids Optional array of media IDs to attach
# @option [Doorkeeper::Application] :application
# @option [String] :idempotency Optional idempotency key
# @option [Boolean] :with_rate_limit
# @option [Enumerable] :allowed_mentions Optional array of expected mentioned account IDs, raises `UnexpectedMentionsError` if unexpected accounts end up in mentions
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# @return [Status]
def call(account, options = {})
@account = account
@options = options
@text = @options[:text] || ''
@in_reply_to = @options[:thread]
return idempotency_duplicate if idempotency_given? && idempotency_duplicate?
validate_media!
preprocess_attributes!
if scheduled?
schedule_status!
else
process_status!
end
redis.setex(idempotency_key, 3_600, @status.id) if idempotency_given?
unless scheduled?
postprocess_status!
bump_potential_friendship!
end
@status
end
private
def fill_blank_text!
return unless @text.blank? && @options[:spoiler_text].present?
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@text = begin
if @media&.any?(&:video?) || @media&.any?(&:gifv?)
'📹'
elsif @media&.any?(&:audio?)
'🎵'
elsif @media&.any?(&:image?)
'🖼'
else
'.'
end
end
end
def preprocess_attributes!
fill_blank_text!
@sensitive = (@options[:sensitive].nil? ? @account.user&.setting_default_sensitive : @options[:sensitive]) || @options[:spoiler_text].present?
@visibility = @options[:visibility] || @account.user&.setting_default_privacy
@visibility = :unlisted if @visibility&.to_sym == :public && @account.silenced?
@scheduled_at = @options[:scheduled_at]&.to_datetime
@scheduled_at = nil if scheduled_in_the_past?
rescue ArgumentError
raise ActiveRecord::RecordInvalid
end
def process_status!
@status = @account.statuses.new(status_attributes)
process_mentions_service.call(@status, save_records: false)
safeguard_mentions!(@status)
# The following transaction block is needed to wrap the UPDATEs to
# the media attachments when the status is created
ApplicationRecord.transaction do
@status.save!
end
end
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def safeguard_mentions!(status)
return if @options[:allowed_mentions].nil?
expected_account_ids = @options[:allowed_mentions].map(&:to_i)
unexpected_accounts = status.mentions.map(&:account).to_a.reject { |mentioned_account| expected_account_ids.include?(mentioned_account.id) }
return if unexpected_accounts.empty?
raise UnexpectedMentionsError.new('Post would be sent to unexpected accounts', unexpected_accounts)
end
def schedule_status!
status_for_validation = @account.statuses.build(status_attributes)
if status_for_validation.valid?
# Marking the status as destroyed is necessary to prevent the status from being
# persisted when the associated media attachments get updated when creating the
# scheduled status.
status_for_validation.destroy
# The following transaction block is needed to wrap the UPDATEs to
# the media attachments when the scheduled status is created
ApplicationRecord.transaction do
@status = @account.scheduled_statuses.create!(scheduled_status_attributes)
end
else
raise ActiveRecord::RecordInvalid
end
end
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def postprocess_status!
process_hashtags_service.call(@status)
Trends.tags.register(@status)
LinkCrawlWorker.perform_async(@status.id)
DistributionWorker.perform_async(@status.id)
ActivityPub::DistributionWorker.perform_async(@status.id) unless @status.local_only?
PollExpirationNotifyWorker.perform_at(@status.poll.expires_at, @status.poll.id) if @status.poll
end
def validate_media!
if @options[:media_ids].blank? || !@options[:media_ids].is_a?(Enumerable)
@media = []
return
end
raise Mastodon::ValidationError, I18n.t('media_attachments.validations.too_many') if @options[:media_ids].size > 4 || @options[:poll].present?
@media = @account.media_attachments.where(status_id: nil).where(id: @options[:media_ids].take(4).map(&:to_i))
raise Mastodon::ValidationError, I18n.t('media_attachments.validations.images_and_video') if @media.size > 1 && @media.find(&:audio_or_video?)
raise Mastodon::ValidationError, I18n.t('media_attachments.validations.not_ready') if @media.any?(&:not_processed?)
end
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def process_mentions_service
ProcessMentionsService.new
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end
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def process_hashtags_service
ProcessHashtagsService.new
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end
def scheduled?
@scheduled_at.present?
end
def idempotency_key
"idempotency:status:#{@account.id}:#{@options[:idempotency]}"
end
def idempotency_given?
@options[:idempotency].present?
end
def idempotency_duplicate
if scheduled?
@account.schedule_statuses.find(@idempotency_duplicate)
else
@account.statuses.find(@idempotency_duplicate)
end
end
def idempotency_duplicate?
@idempotency_duplicate = redis.get(idempotency_key)
end
def scheduled_in_the_past?
@scheduled_at.present? && @scheduled_at <= Time.now.utc + MIN_SCHEDULE_OFFSET
end
def bump_potential_friendship!
return if !@status.reply? || @account.id == @status.in_reply_to_account_id
ActivityTracker.increment('activity:interactions')
return if @account.following?(@status.in_reply_to_account_id)
PotentialFriendshipTracker.record(@account.id, @status.in_reply_to_account_id, :reply)
end
def status_attributes
{
text: @text,
media_attachments: @media || [],
ordered_media_attachment_ids: (@options[:media_ids] || []).map(&:to_i) & @media.map(&:id),
thread: @in_reply_to,
poll_attributes: poll_attributes,
sensitive: @sensitive,
spoiler_text: @options[:spoiler_text] || '',
visibility: @visibility,
language: valid_locale_cascade(@options[:language], @account.user&.preferred_posting_language, I18n.default_locale),
application: @options[:application],
content_type: @options[:content_type] || @account.user&.setting_default_content_type,
rate_limit: @options[:with_rate_limit],
}.compact
end
def scheduled_status_attributes
{
scheduled_at: @scheduled_at,
media_attachments: @media || [],
params: scheduled_options,
}
end
def poll_attributes
return if @options[:poll].blank?
@options[:poll].merge(account: @account, voters_count: 0)
end
def scheduled_options
@options.tap do |options_hash|
options_hash[:in_reply_to_id] = options_hash.delete(:thread)&.id
options_hash[:application_id] = options_hash.delete(:application)&.id
options_hash[:scheduled_at] = nil
options_hash[:idempotency] = nil
options_hash[:with_rate_limit] = false
end
end
end