discourse/app/models/incoming_link.rb

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# frozen_string_literal: true
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class IncomingLink < ActiveRecord::Base
belongs_to :post
belongs_to :user
belongs_to :incoming_referer
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validate :referer_valid
validates :post_id, presence: true
after_create :update_link_counts
attr_accessor :url
def self.add(opts)
user_id, host, referer = nil
current_user = opts[:current_user]
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username = opts[:username]
username = nil if !(String === username)
username = nil if username&.include?("\0")
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if username
u = User.select(:id).find_by(username_lower: username.downcase)
user_id = u.id if u
end
ip_address = opts[:ip_address]
if opts[:referer].present?
begin
host = URI.parse(opts[:referer]).host
referer = opts[:referer][0..999]
rescue URI::Error
# bad uri, skip
end
end
if host != opts[:host] && (user_id || referer)
post_id = opts[:post_id]
post_id ||= Post.where(topic_id: opts[:topic_id],
post_number: opts[:post_number] || 1)
.pluck_first(:id)
cid = current_user ? (current_user.id) : (nil)
ip_address = nil if cid
unless cid && cid == user_id
create(referer: referer,
user_id: user_id,
post_id: post_id,
current_user_id: cid,
ip_address: ip_address) if post_id
end
end
end
def referer=(referer)
self.incoming_referer_id = nil
# will set incoming_referer_id
unless referer.present?
return
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end
parsed = URI.parse(referer)
if parsed.scheme == "http" || parsed.scheme == "https"
domain = IncomingDomain.add!(parsed)
referer_record = IncomingReferer.add!(path: parsed.path, incoming_domain: domain) if domain
self.incoming_referer_id = referer_record.id if referer_record
end
rescue URI::Error
# ignore
end
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def referer
if self.incoming_referer
self.incoming_referer.incoming_domain.to_url + self.incoming_referer.path
end
end
def domain
if incoming_referer
incoming_referer.incoming_domain.name
end
end
# Internal: Update appropriate link counts.
def update_link_counts
DB.exec("UPDATE topics
SET incoming_link_count = incoming_link_count + 1
WHERE id = (SELECT topic_id FROM posts where id = ?)", post_id)
DB.exec("UPDATE posts
SET incoming_link_count = incoming_link_count + 1
WHERE id = ?", post_id)
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end
protected
def referer_valid
return true unless referer
if (referer.length < 3 || referer.length > 100) || (domain.length < 1 || domain.length > 100)
# internal, no need to localize
errors.add(:referer, 'referer is invalid')
false
else
true
end
end
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end
# == Schema Information
#
# Table name: incoming_links
#
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# id :integer not null, primary key
# created_at :datetime not null
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# user_id :integer
# ip_address :inet
# current_user_id :integer
# post_id :integer not null
# incoming_referer_id :integer
#
# Indexes
#
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# index_incoming_links_on_created_at_and_user_id (created_at,user_id)
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# index_incoming_links_on_post_id (post_id)
#