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|
# frozen_string_literal: true
# == Schema Information
#
# Table name: polls
#
# id :bigint(8) not null, primary key
# account_id :bigint(8)
# status_id :bigint(8)
# expires_at :datetime
# options :string default([]), not null, is an Array
# cached_tallies :bigint(8) default([]), not null, is an Array
# multiple :boolean default(FALSE), not null
# hide_totals :boolean default(FALSE), not null
# votes_count :bigint(8) default(0), not null
# last_fetched_at :datetime
# created_at :datetime not null
# updated_at :datetime not null
#
class Poll < ApplicationRecord
include Expireable
belongs_to :account
belongs_to :status
has_many :votes, class_name: 'PollVote', inverse_of: :poll, dependent: :destroy
validates :options, presence: true
validates :expires_at, presence: true, if: :local?
validates_with PollValidator, if: :local?
scope :attached, -> { where.not(status_id: nil) }
scope :unattached, -> { where(status_id: nil) }
before_validation :prepare_votes_count
after_initialize :prepare_cached_tallies
after_commit :reset_parent_cache, on: :update
def loaded_options
options.map.with_index { |title, key| Option.new(self, key.to_s, title, cached_tallies[key]) }
end
def unloaded_options
options.map.with_index { |title, key| Option.new(self, key.to_s, title, nil) }
end
def possibly_stale?
remote? && last_fetched_before_expiration? && time_passed_since_last_fetch?
end
delegate :local?, to: :account
def remote?
!local?
end
class Option < ActiveModelSerializers::Model
attributes :id, :title, :votes_count, :poll
def initialize(poll, id, title, votes_count)
@poll = poll
@id = id
@title = title
@votes_count = votes_count
end
end
private
def prepare_cached_tallies
self.cached_tallies = options.map { 0 } if cached_tallies.empty?
end
def prepare_votes_count
self.votes_count = cached_tallies.sum unless cached_tallies.empty?
end
def reset_parent_cache
return if status_id.nil?
Rails.cache.delete("statuses/#{status_id}")
end
def last_fetched_before_expiration?
last_fetched_at.nil? || expires_at.nil? || last_fetched_at < expires_at
end
def time_passed_since_last_fetch?
last_fetched_at.nil? || last_fetched_at < 1.minute.ago
end
end
|
