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class Vote < ApplicationRecord
belongs_to :user, required: false
belongs_to :story, required: false
belongs_to :comment, required: false
COMMENT_REASONS = {
"O" => "Off-topic",
"I" => "Incorrect",
"M" => "Me-too",
"T" => "Troll",
"S" => "Spam",
"" => "Cancel",
}.freeze
STORY_REASONS = {
"O" => "Off-topic",
"A" => "Already Posted",
"S" => "Spam",
"B" => "Broken Link",
"" => "Cancel",
}.freeze
OLD_STORY_REASONS = {
"Q" => "Low Quality",
}.freeze
def self.votes_by_user_for_stories_hash(user, stories)
votes = {}
Vote.where(:user_id => user, :story_id => stories,
:comment_id => nil).find_each do |v|
votes[v.story_id] = { :vote => v.vote, :reason => v.reason }
end
votes
end
def self.comment_votes_by_user_for_story_hash(user_id, story_id)
votes = {}
Vote.where(
:user_id => user_id, :story_id => story_id
).where(
"comment_id IS NOT NULL"
).find_each do |v|
votes[v.comment_id] = { :vote => v.vote, :reason => v.reason }
end
votes
end
def self.story_votes_by_user_for_story_ids_hash(user_id, story_ids)
if story_ids.empty?
{}
else
votes = self.where(
:user_id => user_id,
:comment_id => nil,
:story_id => story_ids,
)
votes.inject({}) do |memo, v|
memo[v.story_id] = { :vote => v.vote, :reason => v.reason }
memo
end
end
end
def self.comment_votes_by_user_for_comment_ids_hash(user_id, comment_ids)
if comment_ids.empty?
{}
else
votes = self.where(
:user_id => user_id,
:comment_id => comment_ids,
)
votes.inject({}) do |memo, v|
memo[v.comment_id] = { :vote => v.vote, :reason => v.reason }
memo
end
end
end
def self.vote_thusly_on_story_or_comment_for_user_because(
vote, story_id, comment_id, user_id, reason, update_counters = true
)
v = Vote.where(:user_id => user_id, :story_id => story_id,
:comment_id => comment_id).first_or_initialize
if !v.new_record? && v.vote == vote
return
end
upvote = 0
downvote = 0
Vote.transaction do
# unvote
if vote == 0
# neutralize previous vote
upvote = (v.vote == 1 ? -1 : 0)
downvote = (v.vote == -1 ? -1 : 0)
v.destroy!
# new vote or change vote
else
if !v.new_record?
upvote = (v.vote == 1 ? -1 : 0)
downvote = (v.vote == -1 ? -1 : 0)
end
upvote += (vote == 1 ? 1 : 0)
downvote += (vote == -1 ? 1 : 0)
v.vote = vote
v.reason = reason
v.save!
end
if update_counters && (downvote != 0 || upvote != 0)
if v.comment_id
c = Comment.find(v.comment_id)
if c.user_id != user_id
User.update_counters c.user_id, :karma => upvote - downvote
end
c.give_upvote_or_downvote_and_recalculate_confidence!(upvote, downvote)
else
s = Story.find(v.story_id)
if s.user_id != user_id
User.update_counters s.user_id, :karma => upvote - downvote
end
s.give_upvote_or_downvote_and_recalculate_hotness!(upvote, downvote)
end
end
end
end
end
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