discourse/app/services/user_destroyer.rb

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# frozen_string_literal: true
# Responsible for destroying a User record
class UserDestroyer
class PostsExistError < RuntimeError; end
def initialize(actor)
@actor = actor
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.
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.joins(:topic).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
UserSecurityKey.where(user_id: user.id).delete_all
FEATURE: Send notifications for time-based and At Desktop bookmark reminders (#9071) * This PR implements the scheduling and notification system for bookmark reminders. Every 5 minutes a schedule runs to check any reminders that need to be sent before now, limited to **300** reminders at a time. Any leftover reminders will be sent in the next run. This is to avoid having to deal with fickle sidekiq and reminders in the far-flung future, which would necessitate having a background job anyway to clean up any missing `enqueue_at` reminders. * If a reminder is sent its `reminder_at` time is cleared and the `reminder_last_sent_at` time is filled in. Notifications are only user-level notifications for now. * All JavaScript and frontend code related to displaying the bookmark reminder notification is contained here. The reminder functionality is now re-enabled in the bookmark modal as well. * This PR also implements the "Remind me next time I am at my desktop" bookmark reminder functionality. When the user is on a mobile device they are able to select this option. When they choose this option we set a key in Redis saying they have a pending at desktop reminder. The next time they change devices we check if the new device is desktop, and if it is we send reminders using a DistributedMutex. There is also a job to ensure consistency of these reminders in Redis (in case Redis drops the ball) and the at desktop reminders expire after 20 days. * Also in this PR is a fix to delete all Bookmarks for a user via `UserDestroyer`
2020-03-11 20:16:00 -04:00
Bookmark.where(user_id: user.id).delete_all
Draft.where(user_id: user.id).delete_all
Reviewable.where(created_by_id: user.id).delete_all
category_topic_ids = Category.where("topic_id IS NOT NULL").pluck(:topic_id)
if opts[:delete_posts]
DiscoursePluginRegistry.user_destroyer_on_content_deletion_callbacks.each do |cb|
cb.call(user, @guardian, opts)
end
agree_with_flags(user) if opts[:delete_as_spammer]
block_external_urls(user) if opts[:block_urls]
delete_posts(user, category_topic_ids, opts)
end
user.post_actions.find_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
).update_all([
"details = CONCAT(details, ?)",
"\nuser_id: #{user.id}\nusername: #{user.username}"
])
# 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
Invite.where(email: user_emails).each do |invite|
# invited_users will be removed by dependent destroy association when user is destroyed
invite.invited_groups.destroy_all
invite.topic_invites.destroy_all
invite.destroy
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))
Rails.logger.warn("User destroyed without context from: #{caller_locations(14, 1)[0]}") if opts.slice(:context).blank?
end
MessageBus.publish "/logout", result.id, user_ids: [result.id]
end
end
# After the user is deleted, remove the reviewable
if reviewable = ReviewableUser.pending.find_by(target: user)
reviewable.perform(@actor, :delete_user)
end
result
end
protected
def block_external_urls(user)
TopicLink.where(user: user, internal: false).find_each do |link|
next if Oneboxer.engine(link.url) != Onebox::Engine::AllowlistedGenericOnebox
ScreenedUrl.watch(link.url, link.domain, ip_address: user.ip_address)&.record_match!
end
end
def agree_with_flags(user)
ReviewableFlaggedPost.where(target_created_by: user).find_each do |reviewable|
reviewable.perform(@actor, :agree_and_keep) if reviewable.actions_for(@guardian).has?(:agree_and_keep)
end
end
def delete_posts(user, category_topic_ids, opts)
user.posts.find_each do |post|
if post.is_first_post? && category_topic_ids.include?(post.topic_id)
post.update!(user: Discourse.system_user)
else
PostDestroyer.new(@actor.staff? ? @actor : Discourse.system_user, post).destroy
end
if post.topic && post.is_first_post?
Topic.unscoped.where(id: post.topic_id).update_all(user_id: nil)
end
end
end
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