497 lines
12 KiB
Ruby
497 lines
12 KiB
Ruby
class Comment < ActiveRecord::Base
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belongs_to :user
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belongs_to :story,
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:inverse_of => :comments
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has_many :votes,
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:dependent => :delete_all
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belongs_to :parent_comment,
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:class_name => "Comment"
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has_one :moderation,
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:class_name => "Moderation"
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belongs_to :hat
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attr_accessor :current_vote, :previewing, :indent_level
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before_validation :on => :create do
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self.assign_short_id_and_upvote
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self.assign_initial_confidence
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self.assign_thread_id
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end
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after_create :record_initial_upvote, :mark_submitter,
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:deliver_reply_notifications, :deliver_mention_notifications,
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:log_to_countinual
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after_destroy :unassign_votes
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scope :active, -> { where(:is_deleted => false, :is_moderated => false) }
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DOWNVOTABLE_DAYS = 7
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# the lowest a score can go, which makes it collapsed by default
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DOWNVOTABLE_MIN_SCORE = -5
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# after this many minutes old, a comment cannot be edited
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MAX_EDIT_MINS = (60 * 6)
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validate do
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self.comment.to_s.strip == "" &&
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errors.add(" ", I18n.t( 'models.comment.commentcannotbeblank'))
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self.user_id.blank? &&
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errors.add(" ", I18n.t( 'models.comment.useridcannotbeblank'))
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self.story_id.blank? &&
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errors.add(" ", I18n.t( 'models.comment.storyidcannotbeblank'))
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(m = self.comment.to_s.strip.match(/\A(t)his([\.!])?$\z/i)) &&
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errors.add(:base, (m[1] == "T" ? "N" : "n") + "ope" + m[2].to_s)
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self.comment.to_s.strip.match(/\Atl;?dr.?$\z/i) &&
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errors.add(:base, "Wow! A blue car!")
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self.comment.to_s.strip.match(/\Ame too.?\z/i) &&
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errors.add(:base, I18n.t( 'models.comment.metooerror'))
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end
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def self.arrange_for_user(user)
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parents = self.order("is_dragon ASC, (upvotes - downvotes) < 0 ASC, " <<
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"confidence DESC").group_by(&:parent_comment_id)
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# top-down list of comments, regardless of indent level
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ordered = []
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ancestors = [nil] # nil sentinel so indent_level starts at 1 without add op.
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subtree = parents[nil]
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while subtree
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if (node = subtree.shift)
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children = parents[node.id]
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# for deleted comments, if they have no children, they can be removed
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# from the tree. otherwise they have to stay and a "[deleted]" stub
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# will be shown
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if !node.is_gone?
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# not deleted or moderated
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elsif children
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# we have child comments
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elsif user && (user.is_moderator? || node.user_id == user.id)
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# admins and authors should be able to see their deleted comments
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else
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# drop this one
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next
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end
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node.indent_level = ancestors.length
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ordered << node
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# no children to recurse
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next unless children
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# for moderated threads, remove the entire sub-tree at the moderation
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# point
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next if node.is_moderated?
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# drill down a level
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ancestors << subtree
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subtree = children
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else
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# climb back out
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subtree = ancestors.pop
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end
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end
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ordered
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end
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def self.regenerate_markdown
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Comment.record_timestamps = false
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Comment.all.each do |c|
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c.markeddown_comment = c.generated_markeddown_comment
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c.save(:validate => false)
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end
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Comment.record_timestamps = true
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nil
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end
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def self.score_sql
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"(CAST(upvotes AS #{Story.votes_cast_type}) - " <<
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"CAST(downvotes AS #{Story.votes_cast_type}))"
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end
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def as_json(options = {})
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h = [
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:short_id,
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:short_id_url,
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:created_at,
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:updated_at,
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:is_deleted,
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:is_moderated,
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:score,
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:upvotes,
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:downvotes,
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{ :comment => (self.is_gone? ? "<em>#{self.gone_text}</em>" :
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:markeddown_comment) },
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:url,
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:indent_level,
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{ :commenting_user => :user },
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]
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js = {}
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h.each do |k|
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if k.is_a?(Symbol)
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js[k] = self.send(k)
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elsif k.is_a?(Hash)
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if k.values.first.is_a?(Symbol)
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js[k.keys.first] = self.send(k.values.first)
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else
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js[k.keys.first] = k.values.first
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end
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end
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end
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js
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end
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def assign_initial_confidence
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self.confidence = self.calculated_confidence
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end
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def assign_short_id_and_upvote
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self.short_id = ShortId.new(self.class).generate
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self.upvotes = 1
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end
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def assign_thread_id
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if self.parent_comment_id.present?
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self.thread_id = self.parent_comment.thread_id
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else
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self.thread_id = Keystore.incremented_value_for("thread_id")
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end
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end
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def become_dragon_for_user(user)
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Comment.record_timestamps = false
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self.is_dragon = true
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m = Moderation.new
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m.comment_id = self.id
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m.moderator_user_id = user.id
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m.action = I18n.t('models.comment.turnedintodragon')
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m.save
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self.save(:validate => false)
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Comment.record_timestamps = true
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end
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def remove_dragon_for_user(user)
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Comment.record_timestamps = false
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self.is_dragon = false
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m = Moderation.new
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m.comment_id = self.id
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m.moderator_user_id = user.id
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m.action = I18n.t('models.comment.slayeddragon')
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m.save
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self.save(:validate => false)
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Comment.record_timestamps = true
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end
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# http://evanmiller.org/how-not-to-sort-by-average-rating.html
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# https://github.com/reddit/reddit/blob/master/r2/r2/lib/db/_sorts.pyx
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def calculated_confidence
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n = (upvotes + downvotes).to_f
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if n == 0.0
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return 0
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end
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z = 1.281551565545 # 80% confidence
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p = upvotes.to_f / n
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left = p + (1 / ((2.0 * n) * z * z))
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right = z * Math.sqrt((p * ((1.0 - p) / n)) + (z * (z / (4.0 * n * n))))
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under = 1.0 + ((1.0 / n) * z * z)
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return (left - right) / under
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end
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def comment=(com)
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self[:comment] = com.to_s.rstrip
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self.markeddown_comment = self.generated_markeddown_comment
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end
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def delete_for_user(user, reason = nil)
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Comment.record_timestamps = false
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self.is_deleted = true
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if user.is_moderator? && user.id != self.user_id
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self.is_moderated = true
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m = Moderation.new
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m.comment_id = self.id
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m.moderator_user_id = user.id
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m.action = I18n.t('models.comment.deletedcomment')
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if reason.present?
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m.reason = reason
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end
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m.save
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end
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self.save(:validate => false)
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Comment.record_timestamps = true
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self.story.update_comments_count!
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self.user.update_comments_posted_count!
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end
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def deliver_mention_notifications
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self.plaintext_comment.scan(/\B\@([\w\-]+)/).flatten.uniq.each do |mention|
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if u = User.where(:username => mention).first
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if u.id == self.user.id
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next
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end
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if u.email_mentions?
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begin
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EmailReply.mention(self, u).deliver_now
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rescue => e
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Rails.logger.error "error e-mailing #{u.email}: #{e}"
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end
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end
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if u.pushover_mentions?
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u.pushover!({
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:title => "#{Rails.application.name} mention by " <<
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"#{self.user.username} on #{self.story.title}",
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:message => self.plaintext_comment,
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:url => self.url,
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:url_title => "Reply to #{self.user.username}",
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})
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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 deliver_reply_notifications
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if self.parent_comment_id && (u = self.parent_comment.try(:user)) &&
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u.id != self.user.id
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if u.email_replies?
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begin
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EmailReply.reply(self, u).deliver_now
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rescue => e
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Rails.logger.error "error e-mailing #{u.email}: #{e}"
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end
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end
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if u.pushover_replies?
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u.pushover!({
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:title => "#{Rails.application.name} reply from " <<
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"#{self.user.username} on #{self.story.title}",
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:message => self.plaintext_comment,
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:url => self.url,
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:url_title => "Reply to #{self.user.username}",
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})
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end
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end
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end
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def generated_markeddown_comment
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Markdowner.to_html(self.comment)
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end
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def give_upvote_or_downvote_and_recalculate_confidence!(upvote, downvote)
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self.upvotes += upvote.to_i
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self.downvotes += downvote.to_i
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Comment.connection.execute("UPDATE #{Comment.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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"confidence = '#{self.calculated_confidence}' WHERE id = " <<
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"#{self.id.to_i}")
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self.story.recalculate_hotness!
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end
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def gone_text
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if self.is_moderated?
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I18n.t('models.comment.threadremovedby', :modoname => "#{self.moderation.try(:moderator).try(:username).to_s}", :modreason => "#{(self.moderation.try(:reason) || "No reason given")}")
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elsif self.user.is_banned?
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"Comment from banned user removed"
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else
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"Comment removed by author"
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end
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end
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def has_been_edited?
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self.updated_at && (self.updated_at - self.created_at > 1.minute)
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end
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def html_class_for_user
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c = []
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if !self.user.is_active?
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c.push "inactive_user"
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elsif self.user.is_new?
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c.push "new_user"
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elsif self.story && self.story.user_is_author? &&
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self.story.user_id == self.user_id
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c.push "user_is_author"
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end
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c.join("")
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end
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def is_deletable_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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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 is_downvotable?
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if self.created_at && self.score > DOWNVOTABLE_MIN_SCORE
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Time.now - self.created_at <= DOWNVOTABLE_DAYS.days
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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.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.updated_at ? self.updated_at.to_i :
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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_gone?
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is_deleted? || is_moderated?
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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 log_to_countinual
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Countinual.count!("#{Rails.application.shortname}.comments.submitted", "+1")
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end
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def mark_submitter
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Keystore.increment_value_for("user:#{self.user_id}:comments_posted")
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end
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def mailing_list_message_id
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[
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"comment",
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self.short_id,
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self.is_from_email ? "email" : nil,
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created_at.to_i
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].reject{|p| !p }.join(".") << "@" << Rails.application.domain
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end
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def path
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self.story.comments_path + "/comments/#{self.short_id}#c_#{self.short_id}"
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end
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def plaintext_comment
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# TODO: linkify then strip tags and convert entities back
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comment
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end
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def record_initial_upvote
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Vote.vote_thusly_on_story_or_comment_for_user_because(1, self.story_id,
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self.id, self.user_id, nil, false)
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self.story.update_comments_count!
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end
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def score
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self.upvotes - self.downvotes
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end
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def short_id_url
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Rails.application.root_url + "c/#{self.short_id}"
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end
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def to_param
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self.short_id
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end
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def unassign_votes
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self.story.update_comments_count!
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end
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def url
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self.story.comments_url + "#c_#{self.short_id}"
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end
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def vote_summary_for_user(u)
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r_counts = {}
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r_users = {}
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# don't includes(:user) here and assume the caller did this already
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self.votes.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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r_users[v.reason.to_s] ||= []
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r_users[v.reason.to_s].push v.user.username
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end
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r_counts.keys.sort.map{|k|
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if k == ""
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"+#{r_counts[k]}"
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else
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o = "#{r_counts[k]} #{Vote::COMMENT_REASONS[k]}"
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if u && u.is_moderator? && self.user_id != u.id
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o << " (#{r_users[k].join(", ")})"
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end
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o
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end
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}.join(", ")
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end
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def undelete_for_user(user)
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Comment.record_timestamps = false
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self.is_deleted = false
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if user.is_moderator?
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self.is_moderated = false
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if user.id != self.user_id
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m = Moderation.new
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m.comment_id = self.id
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m.moderator_user_id = user.id
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m.action = "undeleted comment"
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m.save
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end
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end
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self.save(:validate => false)
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Comment.record_timestamps = true
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self.story.update_comments_count!
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self.user.update_comments_posted_count!
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end
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end
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