require_dependency 'jobs/base' require_dependency 'pretty_text' require_dependency 'rate_limiter' require_dependency 'post_revisor' require_dependency 'enum' require_dependency 'trashable' require_dependency 'post_analyzer' require_dependency 'validators/post_validator' require_dependency 'plugin/filter' require 'archetype' require 'digest/sha1' class Post < ActiveRecord::Base include RateLimiter::OnCreateRecord include Trashable rate_limit rate_limit :limit_posts_per_day belongs_to :user belongs_to :topic, counter_cache: :posts_count belongs_to :reply_to_user, class_name: "User" has_many :post_replies has_many :replies, through: :post_replies has_many :post_actions has_many :topic_links has_many :post_uploads has_many :uploads, through: :post_uploads has_one :post_search_data has_many :post_details has_many :post_revisions has_many :revisions, foreign_key: :post_id, class_name: 'PostRevision' validates_with ::Validators::PostValidator # We can pass several creating options to a post via attributes attr_accessor :image_sizes, :quoted_post_numbers, :no_bump, :invalidate_oneboxes, :cooking_options, :skip_unique_check SHORT_POST_CHARS = 1200 scope :by_newest, -> { order('created_at desc, id desc') } scope :by_post_number, -> { order('post_number ASC') } scope :with_user, -> { includes(:user) } scope :created_since, lambda { |time_ago| where('posts.created_at > ?', time_ago) } scope :public_posts, -> { joins(:topic).where('topics.archetype <> ?', Archetype.private_message) } scope :private_posts, -> { joins(:topic).where('topics.archetype = ?', Archetype.private_message) } scope :with_topic_subtype, ->(subtype) { joins(:topic).where('topics.subtype = ?', subtype) } delegate :username, to: :user def self.hidden_reasons @hidden_reasons ||= Enum.new(:flag_threshold_reached, :flag_threshold_reached_again, :new_user_spam_threshold_reached) end def self.types @types ||= Enum.new(:regular, :moderator_action) end def self.cook_methods @cook_methods ||= Enum.new(:regular, :raw_html) end def self.find_by_detail(key, value) includes(:post_details).where(post_details: { key: key, value: value }).first end def add_detail(key, value, extra = nil) post_details.build(key: key, value: value, extra: extra) end def limit_posts_per_day if user.created_at > 1.day.ago && post_number > 1 RateLimiter.new(user, "first-day-replies-per-day:#{Date.today.to_s}", SiteSetting.max_replies_in_first_day, 1.day.to_i) end end def trash!(trashed_by=nil) self.topic_links.each(&:destroy) super(trashed_by) end def recover! super update_flagged_posts_count TopicLink.extract_from(self) if topic && topic.category_id && topic.category topic.category.update_latest end end # The key we use in redis to ensure unique posts def unique_post_key "post-#{user_id}:#{raw_hash}" end def store_unique_post_key if SiteSetting.unique_posts_mins > 0 $redis.setex(unique_post_key, SiteSetting.unique_posts_mins.minutes.to_i, id) end end def matches_recent_post? post_id = $redis.get(unique_post_key) post_id != nil and post_id != id end def raw_hash return if raw.blank? Digest::SHA1.hexdigest(raw.gsub(/\s+/, "")) end def self.white_listed_image_classes @white_listed_image_classes ||= ['avatar', 'favicon', 'thumbnail'] end def post_analyzer @post_analyzers ||= {} @post_analyzers[raw_hash] ||= PostAnalyzer.new(raw, topic_id) end %w{raw_mentions linked_hosts image_count attachment_count link_count raw_links}.each do |attr| define_method(attr) do post_analyzer.send(attr) end end def cook(*args) # For some posts, for example those imported via RSS, we support raw HTML. In that # case we can skip the rendering pipeline. return raw if cook_method == Post.cook_methods[:raw_html] # Default is to cook posts cooked = if !self.user || !self.user.has_trust_level?(:leader) post_analyzer.cook(*args) else # At trust level 3, we don't apply nofollow to links cloned = args.dup cloned[1] ||= {} cloned[1][:omit_nofollow] = true post_analyzer.cook(*cloned) end Plugin::Filter.apply( :after_post_cook, self, cooked ) end # Sometimes the post is being edited by someone else, for example, a mod. # If that's the case, they should not be bound by the original poster's # restrictions, for example on not posting images. def acting_user @acting_user || user end def acting_user=(pu) @acting_user = pu end def whitelisted_spam_hosts hosts = SiteSetting .white_listed_spam_host_domains .split('|') .map{|h| h.strip} .reject{|h| !h.include?('.')} hosts << GlobalSetting.hostname end def total_hosts_usage hosts = linked_hosts.clone whitelisted = whitelisted_spam_hosts hosts.reject! do |h| whitelisted.any? do |w| h.end_with?(w) end end return hosts if hosts.length == 0 TopicLink.where(domain: hosts.keys, user_id: acting_user.id) .group(:domain, :post_id) .count.keys.each do |tuple| domain = tuple[0] hosts[domain] = (hosts[domain] || 0) + 1 end hosts end # Prevent new users from posting the same hosts too many times. def has_host_spam? return false if acting_user.present? && acting_user.has_trust_level?(:basic) total_hosts_usage.each do |host, count| return true if count >= SiteSetting.newuser_spam_host_threshold end false end def archetype topic.archetype end def self.regular_order order(:sort_order, :post_number) end def self.reverse_order order('sort_order desc, post_number desc') end def self.summary where(["(post_number = 1) or (percent_rank <= ?)", SiteSetting.summary_percent_filter.to_f / 100.0]) end def update_flagged_posts_count PostAction.update_flagged_posts_count end def filter_quotes(parent_post = nil) return cooked if parent_post.blank? # We only filter quotes when there is exactly 1 return cooked unless (quote_count == 1) parent_raw = parent_post.raw.sub(/\[quote.+\/quote\]/m, '') if raw[parent_raw] || (parent_raw.size < SHORT_POST_CHARS) return cooked.sub(/\/m, '') end cooked end def external_id "#{topic_id}/#{post_number}" end def quoteless? (quote_count == 0) && (reply_to_post_number.present?) end def reply_to_post return if reply_to_post_number.blank? @reply_to_post ||= Post.where("topic_id = :topic_id AND post_number = :post_number", topic_id: topic_id, post_number: reply_to_post_number).first end def reply_notification_target return if reply_to_post_number.blank? Post.where("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).first.try(:user) end def self.excerpt(cooked, maxlength = nil, options = {}) maxlength ||= SiteSetting.post_excerpt_maxlength PrettyText.excerpt(cooked, maxlength, options) end # Strip out most of the markup def excerpt(maxlength = nil, options = {}) Post.excerpt(cooked, maxlength, options) end def is_first_post? post_number == 1 end def is_flagged? post_actions.where(post_action_type_id: PostActionType.flag_types.values, deleted_at: nil).count != 0 end def unhide! self.hidden = false self.hidden_reason_id = nil self.topic.update_attributes(visible: true) save end def url Post.url(topic.slug, topic.id, post_number) end def self.url(slug, topic_id, post_number) "/t/#{slug}/#{topic_id}/#{post_number}" end def self.urls(post_ids) ids = post_ids.map{|u| u} if ids.length > 0 urls = {} Topic.joins(:posts).where('posts.id' => ids). select(['posts.id as post_id','post_number', 'topics.slug', 'topics.title', 'topics.id']). each do |t| urls[t.post_id.to_i] = url(t.slug, t.id, t.post_number) end urls else {} end end def revise(updated_by, new_raw, opts = {}) PostRevisor.new(self).revise!(updated_by, new_raw, opts) end def set_owner(new_user, actor) revise(actor, self.raw, { new_user: new_user, changed_owner: true, edit_reason: I18n.t('change_owner.post_revision_text', old_user: self.user.username_lower, new_user: new_user.username_lower) }) end before_create do PostCreator.before_create_tasks(self) end # This calculates the geometric mean of the post timings and stores it along with # each post. def self.calculate_avg_time(min_topic_age=nil) retry_lock_error do builder = SqlBuilder.new("UPDATE posts SET avg_time = (x.gmean / 1000) FROM (SELECT post_timings.topic_id, post_timings.post_number, round(exp(avg(ln(msecs)))) AS gmean FROM post_timings INNER JOIN posts AS p2 ON p2.post_number = post_timings.post_number AND p2.topic_id = post_timings.topic_id AND p2.user_id <> post_timings.user_id GROUP BY post_timings.topic_id, post_timings.post_number) AS x /*where*/") builder.where("x.topic_id = posts.topic_id AND x.post_number = posts.post_number AND (posts.avg_time <> (x.gmean / 1000)::int OR posts.avg_time IS NULL)") if min_topic_age 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 self.cooked = cook(raw, topic_id: topic_id) unless new_record? end after_save do save_revision if self.version_changed? end after_update do update_revision if self.changed? 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.where(topic_id: topic_id, post_number: p).first 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? Jobs.enqueue(:process_post, args) end def self.public_posts_count_per_day(since_days_ago=30) public_posts.where('posts.created_at > ?', since_days_ago.days.ago).group('date(posts.created_at)').order('date(posts.created_at)').count end def self.private_messages_count_per_day(since_days_ago, topic_subtype) 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 end def reply_history 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} Post.where(id: post_ids).includes(:user, :topic).order(:id).to_a end def revert_to(number) return if number >= version post_revision = PostRevision.where(post_id: id, number: number + 1).first post_revision.modifications.each do |attribute, change| attribute = "version" if attribute == "cached_version" write_attribute(attribute, change[0]) end end def edit_time_limit_expired? if created_at && SiteSetting.post_edit_time_limit.to_i > 0 created_at < SiteSetting.post_edit_time_limit.to_i.minutes.ago else false end end private def parse_quote_into_arguments(quote) return {} unless quote.present? args = {} quote.first.scan(/([a-z]+)\:(\d+)/).each do |arg| args[arg[0].to_sym] = 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 Post.where(id: post.id).update_all ['reply_count = reply_count + 1'] end end def save_revision modifications = changes.extract!(:raw, :cooked, :edit_reason, :user_id) # make sure cooked is always present (oneboxes might not change the cooked post) modifications["cooked"] = [self.cooked, self.cooked] unless modifications["cooked"].present? PostRevision.create!( user_id: last_editor_id, post_id: id, number: version, modifications: modifications ) end def update_revision revision = PostRevision.where(post_id: id, number: version).first return unless revision revision.user_id = last_editor_id revision.modifications = changes.extract!(:raw, :cooked, :edit_reason) revision.save 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 # updated_at :datetime # 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(255) # word_count :integer # version :integer default(1), not null # cook_method :integer default(1), not null # # Indexes # # idx_posts_created_at_topic_id (created_at,topic_id) # 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) #