mastodon/app/services/follow_service.rb

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class FollowService < BaseService
# Follow a remote user, notify remote user about the follow
# @param [Account] source_account From which to follow
# @param [String] uri User URI to follow in the form of username@domain
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def call(source_account, uri)
target_account = follow_remote_account_service.(uri)
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return nil if target_account.nil?
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follow = source_account.follow!(target_account)
NotificationWorker.perform_async(follow.stream_entry.id, target_account.id)
source_account.ping!(account_url(source_account, format: 'atom'), [Rails.configuration.x.hub_url])
follow
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end
private
def follow_remote_account_service
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@follow_remote_account_service ||= FollowRemoteAccountService.new
end
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end