mirror of
https://github.com/discourse/discourse.git
synced 2024-11-24 20:51:50 +08:00
112 lines
2.4 KiB
Ruby
112 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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class Permalink < ActiveRecord::Base
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belongs_to :topic
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belongs_to :post
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belongs_to :category
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belongs_to :tag
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belongs_to :user
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before_validation :normalize_url
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validates :url, uniqueness: true
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class Normalizer
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attr_reader :source
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def initialize(source)
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@source = source
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@rules = source.split("|").map { |rule| parse_rule(rule) }.compact if source.present?
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end
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def parse_rule(rule)
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return unless rule =~ %r{/.*/}
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escaping = false
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regex = +""
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sub = +""
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c = 0
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rule.chars.each do |l|
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c += 1 if !escaping && l == "/"
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escaping = l == "\\"
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if c > 1
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sub << l
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else
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regex << l
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end
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end
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[Regexp.new(regex[1..-1]), sub[1..-1] || ""] if regex.length > 1
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end
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def normalize(url)
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return url unless @rules
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@rules.each { |(regex, sub)| url = url.sub(regex, sub) }
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url
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end
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end
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def self.normalize_url(url)
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if url
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url = url.strip
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url = url[1..-1] if url[0, 1] == "/"
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end
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normalizations = SiteSetting.permalink_normalizations
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@normalizer = Normalizer.new(normalizations) unless @normalizer &&
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@normalizer.source == normalizations
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@normalizer.normalize(url)
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end
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def self.find_by_url(url)
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find_by(url: normalize_url(url))
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end
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def normalize_url
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self.url = Permalink.normalize_url(url) if url
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end
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def target_url
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return external_url if external_url
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return "#{Discourse.base_path}#{post.url}" if post
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return topic.relative_url if topic
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return category.url if category
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return tag.full_url if tag
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return user.full_url if user
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nil
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end
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def self.filter_by(url = nil)
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permalinks =
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Permalink.includes(:topic, :post, :category, :tag, :user).order("permalinks.created_at desc")
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permalinks.where!("url ILIKE :url OR external_url ILIKE :url", url: "%#{url}%") if url.present?
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permalinks.limit!(100)
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permalinks.to_a
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end
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end
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# == Schema Information
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#
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# Table name: permalinks
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#
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# id :integer not null, primary key
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# url :string(1000) not null
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# topic_id :integer
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# post_id :integer
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# category_id :integer
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# created_at :datetime not null
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# updated_at :datetime not null
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# external_url :string(1000)
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# tag_id :integer
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# user_id :integer
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#
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# Indexes
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#
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# index_permalinks_on_url (url) UNIQUE
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#
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