discourse/app/services/spam_rules_enforcer.rb

87 lines
2.9 KiB
Ruby

# The SpamRulesEnforcer class takes action against users based on flags that their posts
# receive, their trust level, etc.
class SpamRulesEnforcer
include Rails.application.routes.url_helpers
# The exclamation point means that this method may make big changes to posts and users.
def self.enforce!(arg)
SpamRulesEnforcer.new(arg).enforce!
end
def initialize(arg)
@user = arg if arg.is_a?(User)
@post = arg if arg.is_a?(Post)
end
def enforce!
# TODO: once rules are in their own classes, invoke them from here in priority order
if @user
block_user if block?
end
if @post
flag_sockpuppet_users if SiteSetting.flag_sockpuppets and reply_is_from_sockpuppet?
end
true
end
# TODO: move this sockpuppet code to its own class. We should be able to add more rules, like ActiveModel validators.
def reply_is_from_sockpuppet?
return false if @post.post_number and @post.post_number == 1
first_post = @post.topic.posts.by_post_number.first
return false if first_post.user.nil?
!first_post.user.staff? and !@post.user.staff? and
@post.user != first_post.user and
@post.user.ip_address == first_post.user.ip_address and
@post.user.new_user?
end
def flag_sockpuppet_users
system_user = Discourse.system_user
PostAction.act(system_user, @post, PostActionType.types[:spam], message: I18n.t('flag_reason.sockpuppet')) rescue PostAction::AlreadyActed
if (first_post = @post.topic.posts.by_post_number.first).try(:user).try(:new_user?)
PostAction.act(system_user, first_post, PostActionType.types[:spam], message: I18n.t('flag_reason.sockpuppet')) rescue PostAction::AlreadyActed
end
end
# TODO: move all this auto-block code to another class:
def self.block?(user)
SpamRulesEnforcer.new(user).block?
end
def self.punish!(user)
SpamRulesEnforcer.new(user).block_user
end
def block?
@user.blocked? or
(!@user.has_trust_level?(:basic) and
SiteSetting.num_flags_to_block_new_user > 0 and
SiteSetting.num_users_to_block_new_user > 0 and
num_spam_flags_against_user >= SiteSetting.num_flags_to_block_new_user and
num_users_who_flagged_spam_against_user >= SiteSetting.num_users_to_block_new_user)
end
def num_spam_flags_against_user
Post.where(user_id: @user.id).sum(:spam_count)
end
def num_users_who_flagged_spam_against_user
post_ids = Post.where('user_id = ? and spam_count > 0', @user.id).pluck(:id)
return 0 if post_ids.empty?
PostAction.spam_flags.where(post_id: post_ids).uniq.pluck(:user_id).size
end
def block_user
Post.transaction do
if UserBlocker.block(@user, nil, {message: :too_many_spam_flags}) and SiteSetting.notify_mods_when_user_blocked
GroupMessage.create(Group[:moderators].name, :user_automatically_blocked, {user: @user, limit_once_per: false})
end
end
end
end