418 lines
10 KiB
Ruby
418 lines
10 KiB
Ruby
class Story < ActiveRecord::Base
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belongs_to :user
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has_many :taggings,
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:autosave => true
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has_many :comments
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has_many :tags, :through => :taggings
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validates_length_of :title, :in => 3..150
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validates_length_of :description, :maximum => (64 * 1024)
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validates_presence_of :user_id
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# after this many minutes old, a story cannot be edited
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MAX_EDIT_MINS = 30
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attr_accessor :_comment_count
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attr_accessor :vote, :already_posted_story, :fetched_content, :previewing
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attr_accessor :editor_user_id, :moderation_reason
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attr_accessible :title, :description, :tags_a, :moderation_reason
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before_validation :assign_short_id,
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:on => :create
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before_save :log_moderation
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after_create :mark_submitter
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define_index do
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indexes url
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indexes title
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indexes description
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indexes user.username, :as => :author
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indexes tags(:tag), :as => :tags
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has created_at, :sortable => true
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has hotness, is_expired
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has "(cast(upvotes as signed) - cast(downvotes as signed))",
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:as => :score, :type => :bigint, :sortable => true
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set_property :field_weights => {
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:upvotes => 15,
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:title => 10,
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:tags => 5,
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}
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where "is_expired = 0"
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end
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validate do
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if self.url.present?
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# URI.parse is not very lenient, so we can't use it
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if self.url.match(/\Ahttps?:\/\/([^\.]+\.)+[a-z]+(\/|\z)/)
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if self.new_record? && (s = Story.find_recent_similar_by_url(self.url))
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errors.add(:url, "has already been submitted recently")
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self.already_posted_story = s
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end
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else
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errors.add(:url, "is not valid")
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end
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elsif self.description.to_s.strip == ""
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errors.add(:description, "must contain text if no URL posted")
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end
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check_tags
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end
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def self.find_recent_similar_by_url(url)
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urls = [ url.to_s ]
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urls2 = [ url.to_s ]
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# https
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urls.each do |u|
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urls2.push u.gsub(/^http:\/\//i, "https://")
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urls2.push u.gsub(/^https:\/\//i, "http://")
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end
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urls = urls2.clone
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# trailing slash
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urls.each do |u|
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urls2.push u.gsub(/\/+\z/, "")
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urls2.push (u + "/")
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end
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urls = urls2.clone
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# www prefix
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urls.each do |u|
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urls2.push u.gsub(/^(https?:\/\/)www\d*\./i) {|_| $1 }
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urls2.push u.gsub(/^(https?:\/\/)/i) {|_| "#{$1}www." }
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end
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urls = urls2.clone
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conds = [ "created_at >= ? AND (", (Time.now - 30.days) ]
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urls.uniq.each_with_index do |u,x|
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conds[0] << (x == 0 ? "" : " OR ") << "url = ?"
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conds.push u
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end
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conds[0] << ")"
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if s = Story.where(*conds).first
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return s
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end
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false
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end
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def self.recalculate_all_hotnesses!
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Story.all.each do |s|
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s.recalculate_hotness!
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end
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end
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def as_json(options = {})
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h = super(:only => [
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:short_id,
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:created_at,
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:title,
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:url,
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])
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h[:score] = score
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h[:comment_count] = comment_count
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h[:description] = markeddown_description
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h[:comments_url] = comments_url
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h[:submitter_user] = user
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if options && options[:with_comments]
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h[:comments] = options[:with_comments]
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end
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h
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end
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def assign_short_id
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self.short_id = ShortId.new(self.class).generate
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end
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def log_moderation
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if self.new_record? || !self.editor_user_id ||
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self.editor_user_id == self.user_id
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return
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end
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all_changes = self.changes.merge(self.tagging_changes)
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m = Moderation.new
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m.moderator_user_id = self.editor_user_id
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m.story_id = self.id
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if all_changes["is_expired"] && self.is_expired?
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m.action = "deleted story"
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elsif all_changes["is_expired"] && !self.is_expired?
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m.action = "undeleted story"
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else
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m.action = all_changes.map{|k,v| "changed #{k} from #{v[0].inspect} " <<
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"to #{v[1].inspect}" }.join(", ")
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end
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m.reason = self.moderation_reason
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m.save
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self.is_moderated = true
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end
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def give_upvote_or_downvote_and_recalculate_hotness!(upvote, downvote)
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self.upvotes += upvote.to_i
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self.downvotes += downvote.to_i
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Story.connection.execute("UPDATE #{Story.table_name} SET " <<
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"upvotes = COALESCE(upvotes, 0) + #{upvote.to_i}, " <<
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"downvotes = COALESCE(downvotes, 0) + #{downvote.to_i}, " <<
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"hotness = '#{self.calculated_hotness}' WHERE id = #{self.id.to_i}")
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end
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def mark_submitter
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Keystore.increment_value_for("user:#{self.user_id}:stories_submitted")
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end
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# this has to happen just before save rather than in tags_a= because we need
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# to have a valid user_id
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def check_tags
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self.taggings.each do |t|
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if !t.tag.valid_for?(self.user)
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raise "#{self.user.username} does not have permission to use " <<
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"privileged tag #{t.tag.tag}"
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end
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end
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if !self.taggings.reject{|t| t.marked_for_destruction? || t.tag.is_media?
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}.any?
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errors.add(:base, "Must have at least one non-media (PDF, video) " <<
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"tag. If no tags apply to your content, it probably doesn't " <<
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"belong here.")
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end
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end
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def comments_url
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"#{short_id_url}/#{self.title_as_url}"
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end
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def short_id_url
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Rails.application.routes.url_helpers.root_url + "s/#{self.short_id}"
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end
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def comment_count
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@_comment_count ||=
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Keystore.value_for("story:#{self.id}:comment_count").to_i
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end
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def domain
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if self.url.blank?
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nil
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else
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pu = URI.parse(self.url)
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pu.host.gsub(/^www\d*\./, "")
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end
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end
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def fetched_title(for_remote_ip = nil)
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doc = Nokogiri::HTML(fetched_content(for_remote_ip).to_s)
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if doc
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return doc.at_css("title").try(:text)
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else
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return ""
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end
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end
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def fetched_content(for_remote_ip = nil)
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return @fetched_content if @fetched_content
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begin
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s = Sponge.new
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s.timeout = 3
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@fetched_content = s.fetch(self.url, :get, nil, nil,
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{ "User-agent" => "#{Rails.application.domain} for #{for_remote_ip}" },
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3)
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rescue
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end
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@fetched_content
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end
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def fetch_story_cache!
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if self.url.present?
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self.story_cache = StoryCacher.get_story_text(self.url)
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end
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end
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def calculated_hotness
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# don't immediately kill stories at 0 by bumping up score by one
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order = Math.log([ (score + 1).abs, 1 ].max, 10)
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if score > 0
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sign = 1
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elsif score < 0
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sign = -1
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else
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sign = 0
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end
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# TODO: as the site grows, shrink this down to 12 or so.
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window = 60 * 60 * 48
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return -((order * sign) + (self.created_at.to_f / window)).round(7)
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end
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def score
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upvotes - downvotes
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end
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def vote_summary
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r_counts = {}
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Vote.where(:story_id => self.id, :comment_id => nil).each do |v|
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r_counts[v.reason.to_s] ||= 0
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r_counts[v.reason.to_s] += v.vote
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end
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r_counts.keys.sort.map{|k|
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k == "" ? "+#{r_counts[k]}" : "#{r_counts[k]} #{Vote::STORY_REASONS[k]}"
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}.join(", ")
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end
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def generated_markeddown_description
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Markdowner.to_html(self.description, { :allow_images => true })
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end
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def description=(desc)
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self[:description] = desc.to_s.rstrip
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self.markeddown_description = self.generated_markeddown_description
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end
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def mailing_list_message_id
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"story.#{short_id}.#{created_at.to_i}@#{Rails.application.domain}"
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end
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@_tags_a = []
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def tags_a
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@_tags_a ||= self.taggings.map{|t| t.tag.tag }
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end
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def tags_a=(new_tag_names_a)
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self.taggings.each do |tagging|
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if !new_tag_names_a.include?(tagging.tag.tag)
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tagging.mark_for_destruction
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end
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end
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new_tag_names_a.each do |tag_name|
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if tag_name.to_s != "" && !self.tags.exists?(:tag => tag_name)
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if t = Tag.where(:tag => tag_name).first
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# we can't lookup whether the user is allowed to use this tag yet
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# because we aren't assured to have a user_id by now; we'll do it in
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# the validation with check_tags
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tg = self.taggings.build
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tg.tag_id = t.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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def tagging_changes
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old_tags_a = self.taggings.reject{|tg| tg.new_record? }.map{|tg|
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tg.tag.tag }.join(" ")
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new_tags_a = self.taggings.reject{|tg| tg.marked_for_destruction?
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}.map{|tg| tg.tag.tag }.join(" ")
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if old_tags_a == new_tags_a
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{}
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else
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{ "tags" => [ old_tags_a, new_tags_a ] }
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end
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end
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def title=(t)
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# change unicode whitespace characters into real spaces
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self[:title] = t.strip
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end
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def title_as_url
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u = self.title.downcase.gsub(/[^a-z0-9_-]/, "_")
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while u.match(/__/)
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u.gsub!("__", "_")
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end
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u.gsub(/^_+/, "").gsub(/_+$/, "")
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end
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def url=(u)
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# strip out stupid google analytics parameters
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if u && (m = u.match(/\A([^\?]+)\?(.+)\z/))
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params = m[2].split("&")
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params.reject!{|p|
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p.match(/^utm_(source|medium|campaign|term|content)=/) }
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u = m[1] << (params.any?? "?" << params.join("&") : "")
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end
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self[:url] = u.to_s.strip
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end
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def url_or_comments_url
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self.url.blank? ? self.comments_url : self.url
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end
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def url_is_editable_by_user?(user)
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if self.new_record?
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true
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elsif user && user.is_moderator? && self.url.present?
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true
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else
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false
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end
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end
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def is_editable_by_user?(user)
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if user && user.is_moderator?
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return true
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elsif user && user.id == self.user_id
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if self.is_moderated?
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return false
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else
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return (Time.now.to_i - self.created_at.to_i < (60 * MAX_EDIT_MINS))
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end
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else
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return false
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end
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end
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def is_undeletable_by_user?(user)
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if user && user.is_moderator?
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return true
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elsif user && user.id == self.user_id && !self.is_moderated?
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return true
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else
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return false
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end
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end
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def can_be_seen_by_user?(user)
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if is_gone? && !(user && (user.is_moderator? || user.id == self.user_id))
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return false
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end
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true
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end
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def is_gone?
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is_expired?
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end
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def recalculate_hotness!
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update_column :hotness, calculated_hotness
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end
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def update_comment_count!
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# calculate count after removing deleted comments and threads
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alive_count = Comment.ordered_for_story_or_thread_for_user(self.id, nil,
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nil).select{|c| !c.is_gone? }.count
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Keystore.put("story:#{self.id}:comment_count", alive_count)
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end
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end
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