mirror of
https://github.com/codeninjasllc/discourse.git
synced 2024-11-24 16:18:42 -05:00
428 lines
12 KiB
Ruby
428 lines
12 KiB
Ruby
require_dependency 'jobs'
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require_dependency 'pretty_text'
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require_dependency 'rate_limiter'
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require_dependency 'post_revisor'
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require_dependency 'enum'
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require_dependency 'trashable'
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require 'archetype'
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require 'digest/sha1'
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class Post < ActiveRecord::Base
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include RateLimiter::OnCreateRecord
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include Trashable
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versioned if: :raw_changed?
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rate_limit
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belongs_to :user
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belongs_to :topic, counter_cache: :posts_count
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belongs_to :reply_to_user, class_name: "User"
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has_many :post_replies
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has_many :replies, through: :post_replies
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has_many :post_actions
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validates_presence_of :raw, :user_id, :topic_id
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validates :raw, stripped_length: { in: -> { SiteSetting.post_length } }
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validate :raw_quality
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validate :max_mention_validator
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validate :max_images_validator
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validate :max_links_validator
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validate :unique_post_validator
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# We can pass a hash of image sizes when saving to prevent crawling those images
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attr_accessor :image_sizes, :quoted_post_numbers, :no_bump, :invalidate_oneboxes
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SHORT_POST_CHARS = 1200
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scope :by_newest, order('created_at desc, id desc')
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scope :with_user, includes(:user)
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scope :public_posts, -> { joins(:topic).where('topics.archetype <> ?', Archetype.private_message) }
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scope :private_posts, -> { joins(:topic).where('topics.archetype = ?', Archetype.private_message) }
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scope :with_topic_subtype, ->(subtype) { joins(:topic).where('topics.subtype = ?', subtype) }
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def self.hidden_reasons
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@hidden_reasons ||= Enum.new(:flag_threshold_reached, :flag_threshold_reached_again)
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end
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def self.types
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@types ||= Enum.new(:regular, :moderator_action)
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end
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def recover!
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super
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update_flagged_posts_count
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end
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def raw_quality
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sentinel = TextSentinel.body_sentinel(raw)
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errors.add(:raw, I18n.t(:is_invalid)) unless sentinel.valid?
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end
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# Stop us from posting the same thing too quickly
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def unique_post_validator
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return if SiteSetting.unique_posts_mins == 0
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return if acting_user.admin? || acting_user.moderator?
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# If the post is empty, default to the validates_presence_of
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return if raw.blank?
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if $redis.exists(unique_post_key)
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errors.add(:raw, I18n.t(:just_posted_that))
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end
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end
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# The key we use in redis to ensure unique posts
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def unique_post_key
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"post-#{user_id}:#{raw_hash}"
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end
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def raw_hash
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return if raw.blank?
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Digest::SHA1.hexdigest(raw.gsub(/\s+/, "").downcase)
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end
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def cooked_document
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self.cooked ||= cook(raw, topic_id: topic_id)
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@cooked_document ||= Nokogiri::HTML.fragment(cooked)
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end
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def reset_cooked
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@cooked_document = nil
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self.cooked = nil
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end
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def self.white_listed_image_classes
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@white_listed_image_classes ||= ['avatar', 'favicon', 'thumbnail']
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end
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def image_count
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return 0 unless raw.present?
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cooked_document.search("img").reject do |t|
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dom_class = t["class"]
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if dom_class
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(Post.white_listed_image_classes & dom_class.split(" ")).count > 0
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end
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end.count
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end
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def link_count
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return 0 unless raw.present?
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# Don't include @mentions in the link count
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total = 0
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cooked_document.search("a[href]").each do |l|
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html_class = l.attributes['class']
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if html_class.present?
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next if html_class.to_s == 'mention' && l.attributes['href'].to_s =~ /^\/users\//
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end
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total +=1
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end
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total
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end
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# Sometimes the post is being edited by someone else, for example, a mod.
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# If that's the case, they should not be bound by the original poster's
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# restrictions, for example on not posting images.
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def acting_user
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@acting_user || user
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end
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def acting_user=(pu)
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@acting_user = pu
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end
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def max_mention_validator
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if acting_user.present? && acting_user.has_trust_level?(:basic)
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errors.add(:base, I18n.t(:too_many_mentions, count: SiteSetting.max_mentions_per_post)) if raw_mentions.size > SiteSetting.max_mentions_per_post
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else
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errors.add(:base, I18n.t(:too_many_mentions_newuser, count: SiteSetting.newuser_max_mentions_per_post)) if raw_mentions.size > SiteSetting.newuser_max_mentions_per_post
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end
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end
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def max_images_validator
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return if acting_user.present? && acting_user.has_trust_level?(:basic)
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errors.add(:base, I18n.t(:too_many_images, count: SiteSetting.newuser_max_images)) if image_count > SiteSetting.newuser_max_images
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end
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def max_links_validator
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return if acting_user.present? && acting_user.has_trust_level?(:basic)
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errors.add(:base, I18n.t(:too_many_links, count: SiteSetting.newuser_max_links)) if link_count > SiteSetting.newuser_max_links
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end
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def raw_mentions
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return [] if raw.blank?
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# We don't count mentions in quotes
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return @raw_mentions if @raw_mentions.present?
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raw_stripped = raw.gsub(/\[quote=(.*)\]([^\[]*?)\[\/quote\]/im, '')
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# Strip pre and code tags
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doc = Nokogiri::HTML.fragment(raw_stripped)
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doc.search("pre").remove
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doc.search("code").remove
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results = doc.to_html.scan(PrettyText.mention_matcher)
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@raw_mentions = results.uniq.map { |un| un.first.downcase.gsub!(/^@/, '') }
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end
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def archetype
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topic.archetype
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end
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def self.regular_order
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order(:sort_order, :post_number)
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end
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def self.reverse_order
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order('sort_order desc, post_number desc')
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end
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def self.best_of
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where(["(post_number = 1) or (percent_rank <= ?)", SiteSetting.best_of_percent_filter.to_f / 100.0])
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end
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def update_flagged_posts_count
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PostAction.update_flagged_posts_count
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end
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def filter_quotes(parent_post = nil)
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return cooked if parent_post.blank?
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# We only filter quotes when there is exactly 1
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return cooked unless (quote_count == 1)
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parent_raw = parent_post.raw.sub(/\[quote.+\/quote\]/m, '')
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if raw[parent_raw] || (parent_raw.size < SHORT_POST_CHARS)
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return cooked.sub(/\<aside.+\<\/aside\>/m, '')
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end
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cooked
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end
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def username
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user.username
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end
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def external_id
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"#{topic_id}/#{post_number}"
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end
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def quoteless?
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(quote_count == 0) && (reply_to_post_number.present?)
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end
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def reply_notification_target
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return if reply_to_post_number.blank?
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Post.where("topic_id = :topic_id AND post_number = :post_number AND user_id <> :user_id",
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topic_id: topic_id,
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post_number: reply_to_post_number,
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user_id: user_id).first.try(:user)
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end
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def self.excerpt(cooked, maxlength = nil, options = {})
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maxlength ||= SiteSetting.post_excerpt_maxlength
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PrettyText.excerpt(cooked, maxlength, options)
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end
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# Strip out most of the markup
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def excerpt(maxlength = nil, options = {})
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Post.excerpt(cooked, maxlength, options)
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end
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# What we use to cook posts
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def cook(*args)
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cooked = PrettyText.cook(*args)
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# If we have any of the oneboxes in the cache, throw them in right away, don't
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# wait for the post processor.
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dirty = false
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result = Oneboxer.apply(cooked) do |url, elem|
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Oneboxer.render_from_cache(url)
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end
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cooked = result.to_html if result.changed?
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cooked
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end
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# A list of versions including the initial version
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def all_versions
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result = []
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result << { number: 1, display_username: user.username, created_at: created_at }
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versions.order(:number).includes(:user).each do |v|
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if v.user.present?
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result << { number: v.number, display_username: v.user.username, created_at: v.created_at }
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end
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end
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result
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end
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def is_flagged?
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post_actions.where(post_action_type_id: PostActionType.flag_types.values, deleted_at: nil).count != 0
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end
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def unhide!
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self.hidden = false
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self.hidden_reason_id = nil
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self.topic.update_attributes(visible: true)
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save
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end
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def url
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Post.url(topic.slug, topic.id, post_number)
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end
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def self.url(slug, topic_id, post_number)
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"/t/#{slug}/#{topic_id}/#{post_number}"
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end
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def self.urls(post_ids)
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ids = post_ids.map{|u| u}
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if ids.length > 0
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urls = {}
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Topic.joins(:posts).where('posts.id' => ids).
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select(['posts.id as post_id','post_number', 'topics.slug', 'topics.title', 'topics.id']).
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each do |t|
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urls[t.post_id.to_i] = url(t.slug, t.id, t.post_number)
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end
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urls
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else
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{}
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end
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end
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def author_readable
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user.readable_name
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end
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def revise(updated_by, new_raw, opts = {})
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PostRevisor.new(self).revise!(updated_by, new_raw, opts)
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end
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# TODO: move into PostCreator
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# Various callbacks
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before_create do
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if reply_to_post_number.present?
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self.reply_to_user_id ||= Post.select(:user_id).where(topic_id: topic_id, post_number: reply_to_post_number).first.try(:user_id)
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end
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self.post_number ||= Topic.next_post_number(topic_id, reply_to_post_number.present?)
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self.cooked ||= cook(raw, topic_id: topic_id)
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self.sort_order = post_number
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DiscourseEvent.trigger(:before_create_post, self)
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self.last_version_at ||= Time.now
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end
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# TODO: Move some of this into an asynchronous job?
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# TODO: Move into PostCreator
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after_create do
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# Update attributes on the topic - featured users and last posted.
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attrs = {last_posted_at: created_at, last_post_user_id: user_id}
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attrs[:bumped_at] = created_at unless no_bump
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topic.update_attributes(attrs)
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# Update topic user data
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TopicUser.change(user,
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topic.id,
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posted: true,
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last_read_post_number: post_number,
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seen_post_count: post_number)
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end
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# This calculates the geometric mean of the post timings and stores it along with
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# each post.
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def self.calculate_avg_time
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retry_lock_error do
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exec_sql("UPDATE posts
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SET avg_time = (x.gmean / 1000)
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FROM (SELECT post_timings.topic_id,
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post_timings.post_number,
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round(exp(avg(ln(msecs)))) AS gmean
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FROM post_timings
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INNER JOIN posts AS p2
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ON p2.post_number = post_timings.post_number
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AND p2.topic_id = post_timings.topic_id
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AND p2.user_id <> post_timings.user_id
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GROUP BY post_timings.topic_id, post_timings.post_number) AS x
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WHERE x.topic_id = posts.topic_id
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AND x.post_number = posts.post_number")
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end
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end
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before_save do
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self.last_editor_id ||= user_id
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self.cooked = cook(raw, topic_id: topic_id) unless new_record?
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end
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def advance_draft_sequence
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return if topic.blank? # could be deleted
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DraftSequence.next!(last_editor_id, topic.draft_key)
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end
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# Determine what posts are quoted by this post
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def extract_quoted_post_numbers
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self.quoted_post_numbers = []
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# Create relationships for the quotes
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raw.scan(/\[quote=\"([^"]+)"\]/).each do |m|
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if m.present?
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args = {}
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m.first.scan(/([a-z]+)\:(\d+)/).each do |arg|
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args[arg[0].to_sym] = arg[1].to_i
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end
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if args[:topic].present?
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# If the topic attribute is present, ensure it's the same topic
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self.quoted_post_numbers << args[:post] if topic_id == args[:topic]
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else
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self.quoted_post_numbers << args[:post]
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end
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end
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end
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self.quoted_post_numbers.uniq!
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self.quote_count = quoted_post_numbers.size
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end
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def save_reply_relationships
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self.quoted_post_numbers ||= []
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self.quoted_post_numbers << reply_to_post_number if reply_to_post_number.present?
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# Create a reply relationship between quoted posts and this new post
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if self.quoted_post_numbers.present?
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self.quoted_post_numbers.map(&:to_i).uniq.each do |p|
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post = Post.where(topic_id: topic_id, post_number: p).first
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if post.present?
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post_reply = post.post_replies.new(reply_id: id)
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if post_reply.save
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Post.update_all ['reply_count = reply_count + 1'], id: post.id
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end
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end
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end
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end
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end
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# Enqueue post processing for this post
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def trigger_post_process
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args = { post_id: id }
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args[:image_sizes] = image_sizes if image_sizes.present?
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args[:invalidate_oneboxes] = true if invalidate_oneboxes.present?
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Jobs.enqueue(:process_post, args)
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end
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def self.public_posts_count_per_day(since_days_ago=30)
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public_posts.where('posts.created_at > ?', since_days_ago.days.ago).group('date(posts.created_at)').order('date(posts.created_at)').count
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end
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def self.private_messages_count_per_day(since_days_ago, topic_subtype)
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private_posts.with_topic_subtype(topic_subtype).where('posts.created_at > ?', since_days_ago.days.ago).group('date(posts.created_at)').order('date(posts.created_at)').count
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end
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end
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