discourse/app/services/user_destroyer.rb

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# frozen_string_literal: true
require_dependency 'ip_addr'
# Responsible for destroying a User record
class UserDestroyer
class PostsExistError < RuntimeError; end
def initialize(actor)
@actor = actor
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raise Discourse::InvalidParameters.new('acting user is nil') unless @actor && @actor.is_a?(User)
@guardian = Guardian.new(actor)
end
# Returns false if the user failed to be deleted.
# Returns a frozen instance of the User if the delete succeeded.
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def destroy(user, opts = {})
raise Discourse::InvalidParameters.new('user is nil') unless user && user.is_a?(User)
raise PostsExistError if !opts[:delete_posts] && user.posts.count != 0
@guardian.ensure_can_delete_user!(user)
# default to using a transaction
opts[:transaction] = true if opts[:transaction] != false
prepare_for_destroy(user) if opts[:prepare_for_destroy] == true
result = nil
optional_transaction(open_transaction: opts[:transaction]) do
Draft.where(user_id: user.id).delete_all
Reviewable.where(created_by_id: user.id).delete_all
if opts[:delete_posts]
user.posts.each do |post|
# agree with flags
if opts[:delete_as_spammer] && reviewable = post.reviewable_flag
reviewable.perform(@actor, :agree_and_keep)
end
# block all external urls
if opts[:block_urls]
post.topic_links.each do |link|
next if link.internal
next if Oneboxer.engine(link.url) != Onebox::Engine::WhitelistedGenericOnebox
ScreenedUrl.watch(link.url, link.domain, ip_address: user.ip_address)&.record_match!
end
end
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PostDestroyer.new(@actor.staff? ? @actor : Discourse.system_user, post).destroy
if post.topic && post.is_first_post?
Topic.unscoped.where(id: post.topic_id).update_all(user_id: nil)
end
end
end
user.post_actions.each do |post_action|
post_action.remove_act!(Discourse.system_user)
end
# Add info about the user to staff action logs
UserHistory.staff_action_records(
Discourse.system_user, acting_user: user.username
).each do |log|
log.details ||= ''
log.details = (log.details.split("\n") +
["user_id: #{user.id}", "username: #{user.username}"]
).join("\n")
log.save!
end
# keep track of emails used
user_emails = user.user_emails.pluck(:email)
if result = user.destroy
if opts[:block_email]
user_emails.each do |email|
ScreenedEmail.block(email, ip_address: result.ip_address)&.record_match!
end
end
if opts[:block_ip] && result.ip_address
ScreenedIpAddress.watch(result.ip_address)&.record_match!
if result.registration_ip_address && result.ip_address != result.registration_ip_address
ScreenedIpAddress.watch(result.registration_ip_address)&.record_match!
end
end
Post.unscoped.where(user_id: result.id).update_all(user_id: nil)
# If this user created categories, fix those up:
Category.where(user_id: result.id).each do |c|
c.user_id = Discourse::SYSTEM_USER_ID
c.save!
if topic = Topic.unscoped.find_by(id: c.topic_id)
topic.recover!
topic.user_id = Discourse::SYSTEM_USER_ID
topic.save!
end
end
unless opts[:quiet]
if @actor == user
deleted_by = Discourse.system_user
opts[:context] = I18n.t("staff_action_logs.user_delete_self", url: opts[:context])
else
deleted_by = @actor
end
StaffActionLogger.new(deleted_by).log_user_deletion(user, opts.slice(:context))
end
MessageBus.publish "/file-change", ["refresh"], user_ids: [result.id]
end
end
# After the user is deleted, remove the reviewable
if reviewable = Reviewable.pending.find_by(target: user)
reviewable.perform(@actor, :reject_user_delete)
end
result
end
protected
def prepare_for_destroy(user)
PostAction.where(user_id: user.id).delete_all
UserAction.where('user_id = :user_id OR target_user_id = :user_id OR acting_user_id = :user_id', user_id: user.id).delete_all
PostTiming.where(user_id: user.id).delete_all
TopicViewItem.where(user_id: user.id).delete_all
TopicUser.where(user_id: user.id).delete_all
TopicAllowedUser.where(user_id: user.id).delete_all
Notification.where(user_id: user.id).delete_all
end
def optional_transaction(open_transaction: true)
if open_transaction
User.transaction { yield }
else
yield
end
end
end