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119 lines
3.2 KiB
Ruby
119 lines
3.2 KiB
Ruby
class IncomingLink < ActiveRecord::Base
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belongs_to :topic
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belongs_to :user
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validates :url, presence: true
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validate :referer_valid
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before_validation :extract_domain
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before_validation :extract_topic_and_post
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after_create :update_link_counts
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def self.add(request,current_user=nil)
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user_id, host, referer = nil
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if request['u']
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u = User.select(:id).find_by(username_lower: request["u"].downcase)
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user_id = u.id if u
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end
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if request.referer.present?
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begin
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host = URI.parse(request.referer).host
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referer = request.referer[0..999]
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rescue URI::InvalidURIError
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# bad uri, skip
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end
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end
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if host != request.host && (user_id || referer)
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cid = current_user.id if current_user
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unless cid && cid == user_id
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IncomingLink.create(url: request.url,
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referer: referer,
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user_id: user_id,
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current_user_id: cid,
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ip_address: request.remote_ip)
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end
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end
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end
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# Internal: Extract the domain from link.
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def extract_domain
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if referer.present?
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# We may get a junk URI, just deal with it
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self.domain = URI.parse(self.referer).host rescue nil
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self.referer = nil unless self.domain
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end
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end
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# Internal: If link is internal and points to topic/post, extract their IDs.
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def extract_topic_and_post
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if url.present?
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parsed = URI.parse(url)
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begin
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# TODO achieve same thing with no exception
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params = Rails.application.routes.recognize_path(parsed.path)
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if self.topic_id = params[:topic_id]
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self.post_number = params[:post_number] || 1
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end
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rescue ActionController::RoutingError
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# If we can't route to the url, that's OK. Don't save those two fields.
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end
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end
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end
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# Internal: Update appropriate link counts.
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def update_link_counts
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if topic_id.present?
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exec_sql("UPDATE topics
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SET incoming_link_count = incoming_link_count + 1
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WHERE id = ?", topic_id)
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if post_number.present?
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exec_sql("UPDATE posts
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SET incoming_link_count = incoming_link_count + 1
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WHERE topic_id = ? and post_number = ?", topic_id, post_number)
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end
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end
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end
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protected
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def referer_valid
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return true unless referer
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if (referer.length < 3 || referer.length > 100) || (domain.length < 1 || domain.length > 100)
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# internal, no need to localize
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errors.add(:referer, 'referer is invalid')
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false
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else
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true
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end
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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: incoming_links
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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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# referer :string(1000)
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# domain :string(100)
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# topic_id :integer
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# post_number :integer
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# created_at :datetime
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# updated_at :datetime
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# user_id :integer
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# ip_address :inet
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# current_user_id :integer
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#
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# Indexes
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#
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# incoming_index (topic_id,post_number)
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# index_incoming_links_on_created_at_and_domain (created_at,domain)
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# index_incoming_links_on_created_at_and_user_id (created_at,user_id)
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#
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