744 lines
23 KiB
Ruby
744 lines
23 KiB
Ruby
require_dependency 'jobs/base'
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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 'post_analyzer'
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require_dependency 'validators/post_validator'
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require_dependency 'plugin/filter'
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require_dependency 'email_cook'
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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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include HasCustomFields
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include LimitedEdit
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# increase this number to force a system wide post rebake
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BAKED_VERSION = 1
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rate_limit
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rate_limit :limit_posts_per_day
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belongs_to :user
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belongs_to :topic
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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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has_many :topic_links
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has_many :group_mentions, dependent: :destroy
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has_many :post_uploads
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has_many :uploads, through: :post_uploads
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has_one :post_search_data
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has_one :post_stat
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has_one :incoming_email
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has_many :post_details
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has_many :post_revisions
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has_many :revisions, foreign_key: :post_id, class_name: 'PostRevision'
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has_many :user_actions, foreign_key: :target_post_id
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validates_with ::Validators::PostValidator
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after_save :index_search
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after_save :create_user_action
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# We can pass several creating options to a post via attributes
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attr_accessor :image_sizes, :quoted_post_numbers, :no_bump, :invalidate_oneboxes, :cooking_options, :skip_unique_check
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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 :by_post_number, -> { order('post_number ASC') }
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scope :with_user, -> { includes(:user) }
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scope :created_since, lambda { |time_ago| where('posts.created_at > ?', time_ago) }
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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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scope :visible, -> { joins(:topic).where('topics.visible = true').where(hidden: false) }
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scope :secured, lambda { |guardian| where('posts.post_type in (?)', Topic.visible_post_types(guardian && guardian.user))}
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scope :for_mailing_list, ->(user, since) {
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created_since(since)
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.joins(:topic)
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.where(topic: Topic.for_digest(user, 100.years.ago)) # we want all topics with new content, regardless when they were created
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.order('posts.created_at ASC')
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}
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scope :mailing_list_new_topics, ->(user, since) { for_mailing_list(user, since).where('topics.created_at > ?', since) }
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scope :mailing_list_updates, ->(user, since) { for_mailing_list(user, since).where('topics.created_at <= ?', since) }
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delegate :username, to: :user
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def self.hidden_reasons
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@hidden_reasons ||= Enum.new(flag_threshold_reached: 1,
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flag_threshold_reached_again: 2,
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new_user_spam_threshold_reached: 3,
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flagged_by_tl3_user: 4)
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end
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def self.types
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@types ||= Enum.new(regular: 1,
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moderator_action: 2,
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small_action: 3,
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whisper: 4)
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end
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def self.cook_methods
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@cook_methods ||= Enum.new(regular: 1,
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raw_html: 2,
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email: 3)
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end
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def self.find_by_detail(key, value)
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includes(:post_details).find_by(post_details: { key: key, value: value })
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end
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def whisper?
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post_type == Post.types[:whisper]
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end
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def add_detail(key, value, extra = nil)
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post_details.build(key: key, value: value, extra: extra)
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end
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def limit_posts_per_day
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if user && user.new_user_posting_on_first_day? && post_number && post_number > 1
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RateLimiter.new(user, "first-day-replies-per-day", SiteSetting.max_replies_in_first_day, 1.day.to_i)
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end
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end
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def publish_change_to_clients!(type, options = {})
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# special failsafe for posts missing topics consistency checks should fix, but message
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# is safe to skip
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return unless topic
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channel = "/topic/#{topic_id}"
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msg = {
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id: id,
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post_number: post_number,
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updated_at: Time.now,
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user_id: user_id,
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last_editor_id: last_editor_id,
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type: type
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}.merge(options)
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if Topic.visible_post_types.include?(post_type)
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MessageBus.publish(channel, msg, group_ids: topic.secure_group_ids)
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else
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user_ids = User.where('admin or moderator or id = ?', user_id).pluck(:id)
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MessageBus.publish(channel, msg, user_ids: user_ids)
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end
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end
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def trash!(trashed_by=nil)
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self.topic_links.each(&:destroy)
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super(trashed_by)
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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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TopicLink.extract_from(self)
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QuotedPost.extract_from(self)
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if topic && topic.category_id && topic.category
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topic.category.update_latest
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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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"unique-post-#{user_id}:#{raw_hash}"
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end
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def store_unique_post_key
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if SiteSetting.unique_posts_mins > 0
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$redis.setex(unique_post_key, SiteSetting.unique_posts_mins.minutes.to_i, id)
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end
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end
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def matches_recent_post?
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post_id = $redis.get(unique_post_key)
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post_id != nil and post_id.to_i != id
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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)
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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 post_analyzer
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@post_analyzers ||= {}
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@post_analyzers[raw_hash] ||= PostAnalyzer.new(raw, topic_id)
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end
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%w{raw_mentions linked_hosts image_count attachment_count link_count raw_links}.each do |attr|
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define_method(attr) do
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post_analyzer.send(attr)
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end
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end
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def add_nofollow?
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user.blank? || SiteSetting.tl3_links_no_follow? || !user.has_trust_level?(TrustLevel[3])
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end
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def omit_nofollow?
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!add_nofollow?
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end
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def cook(*args)
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# For some posts, for example those imported via RSS, we support raw HTML. In that
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# case we can skip the rendering pipeline.
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return raw if cook_method == Post.cook_methods[:raw_html]
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cooked = nil
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if cook_method == Post.cook_methods[:email]
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cooked = EmailCook.new(raw).cook
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else
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cloned = args.dup
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cloned[1] ||= {}
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post_user = self.user
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cloned[1][:user_id] = post_user.id if post_user
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cooked = if add_nofollow?
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post_analyzer.cook(*args)
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else
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# At trust level 3, we don't apply nofollow to links
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cloned[1][:omit_nofollow] = true
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post_analyzer.cook(*cloned)
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end
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end
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new_cooked = Plugin::Filter.apply(:after_post_cook, self, cooked)
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if post_type == Post.types[:regular]
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if new_cooked != cooked && new_cooked.blank?
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Rails.logger.debug("Plugin is blanking out post: #{self.url}\nraw: #{self.raw}")
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elsif new_cooked.blank?
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Rails.logger.debug("Blank post detected post: #{self.url}\nraw: #{self.raw}")
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end
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end
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new_cooked
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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 last_editor
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self.last_editor_id ? (User.find_by_id(self.last_editor_id) || user) : user
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end
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def whitelisted_spam_hosts
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hosts = SiteSetting
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.white_listed_spam_host_domains
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.split('|')
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.map{|h| h.strip}
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.reject{|h| !h.include?('.')}
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hosts << GlobalSetting.hostname
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hosts << RailsMultisite::ConnectionManagement.current_hostname
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end
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def total_hosts_usage
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hosts = linked_hosts.clone
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whitelisted = whitelisted_spam_hosts
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hosts.reject! do |h|
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whitelisted.any? do |w|
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h.end_with?(w)
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end
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end
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return hosts if hosts.length == 0
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TopicLink.where(domain: hosts.keys, user_id: acting_user.id)
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.group(:domain, :post_id)
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.count
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.each_key do |tuple|
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domain = tuple[0]
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hosts[domain] = (hosts[domain] || 0) + 1
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end
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hosts
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end
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# Prevent new users from posting the same hosts too many times.
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def has_host_spam?
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return false if acting_user.present? && (acting_user.staged? || acting_user.has_trust_level?(TrustLevel[1]))
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total_hosts_usage.values.any? { |count| count >= SiteSetting.newuser_spam_host_threshold }
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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.summary(topic_id=nil)
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# PERF: if you pass in nil it is WAY slower
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# pg chokes getting a reasonable plan
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topic_id = topic_id ? topic_id.to_i : "posts.topic_id"
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# percent rank has tons of ties
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where(["post_number = 1 or id in (
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SELECT p1.id
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FROM posts p1
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WHERE p1.percent_rank <= ? AND
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p1.topic_id = #{topic_id}
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ORDER BY p1.percent_rank
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LIMIT ?
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)",
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SiteSetting.summary_percent_filter.to_f / 100.0,
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SiteSetting.summary_max_results
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])
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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 external_id
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"#{topic_id}/#{post_number}"
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end
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def reply_to_post
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return if reply_to_post_number.blank?
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@reply_to_post ||= Post.find_by("topic_id = :topic_id AND post_number = :post_number", topic_id: topic_id, post_number: reply_to_post_number)
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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.find_by("topic_id = :topic_id AND post_number = :post_number AND user_id <> :user_id", topic_id: topic_id, post_number: reply_to_post_number, user_id: user_id).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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def is_first_post?
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post_number.blank? ?
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topic.try(:highest_post_number) == 0 :
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post_number == 1
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end
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def is_reply_by_email?
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via_email && post_number.present? && post_number > 1
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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 has_active_flag?
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post_actions.active.where(post_action_type_id: PostActionType.flag_types.values).count != 0
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end
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def unhide!
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self.update_attributes(hidden: false)
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self.topic.update_attributes(visible: true) if is_first_post?
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save(validate: false)
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publish_change_to_clients!(:acted)
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end
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def full_url
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"#{Discourse.base_url}#{url}"
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end
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def url
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if topic
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Post.url(topic.slug, topic.id, post_number)
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else
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"/404"
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end
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end
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def unsubscribe_url(user)
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"#{Discourse.base_url}/email/unsubscribe/#{UnsubscribeKey.create_key_for(user, self)}"
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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 revise(updated_by, changes={}, opts={})
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PostRevisor.new(self).revise!(updated_by, changes, opts)
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end
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def self.rebake_old(limit)
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problems = []
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Post.where('baked_version IS NULL OR baked_version < ?', BAKED_VERSION)
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.limit(limit).each do |p|
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begin
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p.rebake!
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rescue => e
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problems << {post: p, ex: e}
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end
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end
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problems
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end
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def rebake!(opts=nil)
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opts ||= {}
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new_cooked = cook(raw, topic_id: topic_id, invalidate_oneboxes: opts.fetch(:invalidate_oneboxes, false))
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old_cooked = cooked
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update_columns(cooked: new_cooked, baked_at: Time.new, baked_version: BAKED_VERSION)
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# Extracts urls from the body
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TopicLink.extract_from(self)
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QuotedPost.extract_from(self)
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# make sure we trigger the post process
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trigger_post_process(true)
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publish_change_to_clients!(:rebaked)
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new_cooked != old_cooked
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end
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def set_owner(new_user, actor, skip_revision=false)
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return if user_id == new_user.id
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edit_reason = I18n.t('change_owner.post_revision_text',
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old_user: (self.user.username_lower rescue nil) || I18n.t('change_owner.deleted_user'),
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new_user: new_user.username_lower
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)
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revise(actor, {raw: self.raw, user_id: new_user.id, edit_reason: edit_reason}, {bypass_bump: true, skip_revision: skip_revision})
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if post_number == topic.highest_post_number
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topic.update_columns(last_post_user_id: new_user.id)
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end
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end
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before_create do
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PostCreator.before_create_tasks(self)
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end
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def self.estimate_posts_per_day
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val = $redis.get("estimated_posts_per_day")
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return val.to_i if val
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posts_per_day = Topic.listable_topics.secured.joins(:posts).merge(Post.created_since(30.days.ago)).count / 30
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$redis.setex("estimated_posts_per_day", 1.day.to_i, posts_per_day.to_s)
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posts_per_day
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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(min_topic_age=nil)
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retry_lock_error do
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builder = SqlBuilder.new("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*/")
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builder.where("x.topic_id = posts.topic_id
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AND x.post_number = posts.post_number
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AND (posts.avg_time <> (x.gmean / 1000)::int OR posts.avg_time IS NULL)")
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if min_topic_age
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builder.where("posts.topic_id IN (SELECT id FROM topics where bumped_at > :bumped_at)",
|
|
bumped_at: min_topic_age)
|
|
end
|
|
|
|
builder.exec
|
|
end
|
|
end
|
|
|
|
before_save do
|
|
self.last_editor_id ||= user_id
|
|
|
|
if !new_record? && raw_changed?
|
|
self.cooked = cook(raw, topic_id: topic_id)
|
|
end
|
|
|
|
self.baked_at = Time.new
|
|
self.baked_version = BAKED_VERSION
|
|
end
|
|
|
|
def advance_draft_sequence
|
|
return if topic.blank? # could be deleted
|
|
DraftSequence.next!(last_editor_id, topic.draft_key)
|
|
end
|
|
|
|
# TODO: move to post-analyzer?
|
|
# Determine what posts are quoted by this post
|
|
def extract_quoted_post_numbers
|
|
temp_collector = []
|
|
|
|
# Create relationships for the quotes
|
|
raw.scan(/\[quote=\"([^"]+)"\]/).each do |quote|
|
|
args = parse_quote_into_arguments(quote)
|
|
# If the topic attribute is present, ensure it's the same topic
|
|
temp_collector << args[:post] unless (args[:topic].present? && topic_id != args[:topic])
|
|
end
|
|
|
|
temp_collector.uniq!
|
|
self.quoted_post_numbers = temp_collector
|
|
self.quote_count = temp_collector.size
|
|
end
|
|
|
|
|
|
def save_reply_relationships
|
|
add_to_quoted_post_numbers(reply_to_post_number)
|
|
return if self.quoted_post_numbers.blank?
|
|
|
|
# Create a reply relationship between quoted posts and this new post
|
|
self.quoted_post_numbers.each do |p|
|
|
post = Post.find_by(topic_id: topic_id, post_number: p)
|
|
create_reply_relationship_with(post)
|
|
end
|
|
end
|
|
|
|
# Enqueue post processing for this post
|
|
def trigger_post_process(bypass_bump = false)
|
|
args = {
|
|
post_id: id,
|
|
bypass_bump: bypass_bump
|
|
}
|
|
args[:image_sizes] = image_sizes if image_sizes.present?
|
|
args[:invalidate_oneboxes] = true if invalidate_oneboxes.present?
|
|
args[:cooking_options] = self.cooking_options
|
|
Jobs.enqueue(:process_post, args)
|
|
DiscourseEvent.trigger(:after_trigger_post_process, self)
|
|
end
|
|
|
|
def self.public_posts_count_per_day(start_date, end_date, category_id=nil)
|
|
result = public_posts.where('posts.created_at >= ? AND posts.created_at <= ?', start_date, end_date)
|
|
result = result.where('topics.category_id = ?', category_id) if category_id
|
|
result.group('date(posts.created_at)').order('date(posts.created_at)').count
|
|
end
|
|
|
|
def self.private_messages_count_per_day(start_date, end_date, topic_subtype)
|
|
private_posts.with_topic_subtype(topic_subtype).where('posts.created_at >= ? AND posts.created_at <= ?', start_date, end_date).group('date(posts.created_at)').order('date(posts.created_at)').count
|
|
end
|
|
|
|
def reply_history(max_replies=100, guardian=nil)
|
|
post_ids = Post.exec_sql("WITH RECURSIVE breadcrumb(id, reply_to_post_number) AS (
|
|
SELECT p.id, p.reply_to_post_number FROM posts AS p
|
|
WHERE p.id = :post_id
|
|
UNION
|
|
SELECT p.id, p.reply_to_post_number FROM posts AS p, breadcrumb
|
|
WHERE breadcrumb.reply_to_post_number = p.post_number
|
|
AND p.topic_id = :topic_id
|
|
) SELECT id from breadcrumb ORDER by id", post_id: id, topic_id: topic_id).to_a
|
|
|
|
post_ids.map! {|r| r['id'].to_i }
|
|
.reject! {|post_id| post_id == id}
|
|
|
|
# [1,2,3][-10,-1] => nil
|
|
post_ids = (post_ids[(0-max_replies)..-1] || post_ids)
|
|
|
|
Post.secured(guardian).where(id: post_ids).includes(:user, :topic).order(:id).to_a
|
|
end
|
|
|
|
def revert_to(number)
|
|
return if number >= version
|
|
post_revision = PostRevision.find_by(post_id: id, number: (number + 1))
|
|
post_revision.modifications.each do |attribute, change|
|
|
attribute = "version" if attribute == "cached_version"
|
|
write_attribute(attribute, change[0])
|
|
end
|
|
end
|
|
|
|
def self.rebake_all_quoted_posts(user_id)
|
|
return if user_id.blank?
|
|
|
|
Post.exec_sql <<-SQL
|
|
WITH user_quoted_posts AS (
|
|
SELECT post_id
|
|
FROM quoted_posts
|
|
WHERE quoted_post_id IN (SELECT id FROM posts WHERE user_id = #{user_id})
|
|
)
|
|
UPDATE posts
|
|
SET baked_version = NULL
|
|
WHERE baked_version IS NOT NULL
|
|
AND id IN (SELECT post_id FROM user_quoted_posts)
|
|
SQL
|
|
end
|
|
|
|
def seen?(user)
|
|
PostTiming.where(topic_id: topic_id, post_number: post_number, user_id: user.id).exists?
|
|
end
|
|
|
|
def index_search
|
|
SearchIndexer.index(self)
|
|
end
|
|
|
|
def create_user_action
|
|
UserActionCreator.log_post(self)
|
|
end
|
|
|
|
private
|
|
|
|
def parse_quote_into_arguments(quote)
|
|
return {} unless quote.present?
|
|
args = HashWithIndifferentAccess.new
|
|
quote.first.scan(/([a-z]+)\:(\d+)/).each do |arg|
|
|
args[arg[0]] = arg[1].to_i
|
|
end
|
|
args
|
|
end
|
|
|
|
def add_to_quoted_post_numbers(num)
|
|
return unless num.present?
|
|
self.quoted_post_numbers ||= []
|
|
self.quoted_post_numbers << num
|
|
end
|
|
|
|
def create_reply_relationship_with(post)
|
|
return if post.nil?
|
|
post_reply = post.post_replies.new(reply_id: id)
|
|
if post_reply.save
|
|
if Topic.visible_post_types.include?(self.post_type)
|
|
Post.where(id: post.id).update_all ['reply_count = reply_count + 1']
|
|
end
|
|
end
|
|
end
|
|
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: posts
|
|
#
|
|
# id :integer not null, primary key
|
|
# user_id :integer
|
|
# topic_id :integer not null
|
|
# post_number :integer not null
|
|
# raw :text not null
|
|
# cooked :text not null
|
|
# created_at :datetime not null
|
|
# updated_at :datetime not null
|
|
# reply_to_post_number :integer
|
|
# reply_count :integer default(0), not null
|
|
# quote_count :integer default(0), not null
|
|
# deleted_at :datetime
|
|
# off_topic_count :integer default(0), not null
|
|
# like_count :integer default(0), not null
|
|
# incoming_link_count :integer default(0), not null
|
|
# bookmark_count :integer default(0), not null
|
|
# avg_time :integer
|
|
# score :float
|
|
# reads :integer default(0), not null
|
|
# post_type :integer default(1), not null
|
|
# vote_count :integer default(0), not null
|
|
# sort_order :integer
|
|
# last_editor_id :integer
|
|
# hidden :boolean default(FALSE), not null
|
|
# hidden_reason_id :integer
|
|
# notify_moderators_count :integer default(0), not null
|
|
# spam_count :integer default(0), not null
|
|
# illegal_count :integer default(0), not null
|
|
# inappropriate_count :integer default(0), not null
|
|
# last_version_at :datetime not null
|
|
# user_deleted :boolean default(FALSE), not null
|
|
# reply_to_user_id :integer
|
|
# percent_rank :float default(1.0)
|
|
# notify_user_count :integer default(0), not null
|
|
# like_score :integer default(0), not null
|
|
# deleted_by_id :integer
|
|
# edit_reason :string
|
|
# word_count :integer
|
|
# version :integer default(1), not null
|
|
# cook_method :integer default(1), not null
|
|
# wiki :boolean default(FALSE), not null
|
|
# baked_at :datetime
|
|
# baked_version :integer
|
|
# hidden_at :datetime
|
|
# self_edits :integer default(0), not null
|
|
# reply_quoted :boolean default(FALSE), not null
|
|
# via_email :boolean default(FALSE), not null
|
|
# raw_email :text
|
|
# public_version :integer default(1), not null
|
|
# action_code :string
|
|
# image_url :string
|
|
#
|
|
# Indexes
|
|
#
|
|
# idx_posts_created_at_topic_id (created_at,topic_id)
|
|
# idx_posts_deleted_posts (topic_id,post_number)
|
|
# idx_posts_user_id_deleted_at (user_id)
|
|
# index_posts_on_reply_to_post_number (reply_to_post_number)
|
|
# index_posts_on_topic_id_and_post_number (topic_id,post_number) UNIQUE
|
|
# index_posts_on_user_id_and_created_at (user_id,created_at)
|
|
#
|