discourse/app/models/quoted_post.rb

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class QuotedPost < ActiveRecord::Base
belongs_to :post
belongs_to :quoted_post, class_name: 'Post'
# NOTE we already have a path that does this for topic links,
# however topic links exclude quotes and links within a topic
# we are double parsing this fragment, this may be worth optimising later
def self.extract_from(post)
doc = Nokogiri::HTML.fragment(post.cooked)
uniq = {}
ids = []
doc.css("aside.quote[data-topic]").each do |a|
topic_id = a['data-topic'].to_i
post_number = a['data-post'].to_i
next if topic_id == 0 || post_number == 0
next if uniq[[topic_id,post_number]]
uniq[[topic_id,post_number]] = true
begin
# It would be so much nicer if we used post_id in quotes
results = exec_sql "INSERT INTO quoted_posts(post_id, quoted_post_id, created_at, updated_at)
SELECT :post_id, p.id, current_timestamp, current_timestamp
FROM posts p
LEFT JOIN quoted_posts q on q.post_id = :post_id AND q.quoted_post_id = p.id
WHERE post_number = :post_number AND
topic_id = :topic_id AND
q.id IS NULL
RETURNING quoted_post_id
", post_id: post.id, post_number: post_number, topic_id: topic_id
results = results.to_a
ids << results[0]["quoted_post_id"].to_i if results.length > 0
rescue ActiveRecord::RecordNotUnique, PG::UniqueViolation
# it's fine
end
end
if ids.length > 0
exec_sql "DELETE FROM quoted_posts WHERE post_id = :post_id AND quoted_post_id NOT IN (:ids)",
post_id: post.id, ids: ids
end
# simplest place to add this code
reply_quoted = false
if post.reply_to_post_number
reply_post_id = Post.where(topic_id: post.topic_id, post_number: post.reply_to_post_number).pluck(:id).first
reply_quoted = !!(reply_post_id && ids.include?(reply_post_id))
end
if reply_quoted != post.reply_quoted
post.update_columns(reply_quoted: reply_quoted)
end
end
end
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# == Schema Information
#
# Table name: quoted_posts
#
# id :integer not null, primary key
# post_id :integer not null
# quoted_post_id :integer not null
# created_at :datetime not null
# updated_at :datetime not null
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#
# Indexes
#
# index_quoted_posts_on_post_id_and_quoted_post_id (post_id,quoted_post_id) UNIQUE
# index_quoted_posts_on_quoted_post_id_and_post_id (quoted_post_id,post_id) UNIQUE
#