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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)
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target_account = follow_remote_account_service.call(uri)
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return nil if target_account.nil? || target_account.id == source_account.id
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follow = source_account.follow!(target_account)
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if target_account.local?
NotificationMailer.follow(target_account, source_account).deliver_later
else
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subscribe_service.call(target_account)
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NotificationWorker.perform_async(follow.stream_entry.id, target_account.id)
end
merge_into_timeline(target_account, source_account)
source_account.ping!(account_url(source_account, format: 'atom'), [Rails.configuration.x.hub_url])
follow
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end
private
def merge_into_timeline(from_account, into_account)
timeline_key = FeedManager.instance.key(:home, into_account.id)
from_account.statuses.find_each do |status|
redis.zadd(timeline_key, status.id, status.id)
end
FeedManager.instance.trim(:home, into_account.id)
FeedManager.instance.broadcast(into_account.id, type: 'merge')
end
def redis
$redis
end
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def follow_remote_account_service
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@follow_remote_account_service ||= FollowRemoteAccountService.new
end
def subscribe_service
@subscribe_service ||= SubscribeService.new
end
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end