mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 23:06:57 +08:00
30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
114 lines
2.3 KiB
Ruby
114 lines
2.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Permalink < ActiveRecord::Base
|
|
belongs_to :topic
|
|
belongs_to :post
|
|
belongs_to :category
|
|
|
|
before_validation :normalize_url
|
|
|
|
class Normalizer
|
|
attr_reader :source
|
|
|
|
def initialize(source)
|
|
@source = source
|
|
if source.present?
|
|
@rules = source.split("|").map do |rule|
|
|
parse_rule(rule)
|
|
end.compact
|
|
end
|
|
end
|
|
|
|
def parse_rule(rule)
|
|
return unless rule =~ /\/.*\//
|
|
|
|
escaping = false
|
|
regex = +""
|
|
sub = +""
|
|
c = 0
|
|
|
|
rule.chars.each do |l|
|
|
c += 1 if !escaping && l == "/"
|
|
escaping = l == "\\"
|
|
|
|
if c > 1
|
|
sub << l
|
|
else
|
|
regex << l
|
|
end
|
|
end
|
|
|
|
if regex.length > 1
|
|
[Regexp.new(regex[1..-1]), sub[1..-1] || ""]
|
|
end
|
|
|
|
end
|
|
|
|
def normalize(url)
|
|
return url unless @rules
|
|
@rules.each do |(regex, sub)|
|
|
url = url.sub(regex, sub)
|
|
end
|
|
|
|
url
|
|
end
|
|
|
|
end
|
|
|
|
def self.normalize_url(url)
|
|
if url
|
|
url = url.strip
|
|
url = url[1..-1] if url[0, 1] == '/'
|
|
end
|
|
|
|
normalizations = SiteSetting.permalink_normalizations
|
|
|
|
@normalizer = Normalizer.new(normalizations) unless @normalizer && @normalizer.source == normalizations
|
|
@normalizer.normalize(url)
|
|
end
|
|
|
|
def self.find_by_url(url)
|
|
find_by(url: normalize_url(url))
|
|
end
|
|
|
|
def normalize_url
|
|
self.url = Permalink.normalize_url(url) if url
|
|
end
|
|
|
|
def target_url
|
|
return external_url if external_url
|
|
return "#{Discourse::base_uri}#{post.url}" if post
|
|
return topic.relative_url if topic
|
|
return category.url if category
|
|
nil
|
|
end
|
|
|
|
def self.filter_by(url = nil)
|
|
permalinks = Permalink
|
|
.includes(:topic, :post, :category)
|
|
.order('permalinks.created_at desc')
|
|
|
|
permalinks.where!('url ILIKE :url OR external_url ILIKE :url', url: "%#{url}%") if url.present?
|
|
permalinks.limit!(100)
|
|
permalinks.to_a
|
|
end
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: permalinks
|
|
#
|
|
# id :integer not null, primary key
|
|
# url :string(1000) not null
|
|
# topic_id :integer
|
|
# post_id :integer
|
|
# category_id :integer
|
|
# created_at :datetime not null
|
|
# updated_at :datetime not null
|
|
# external_url :string(1000)
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_permalinks_on_url (url) UNIQUE
|
|
#
|