glitchier-soc/app/models/invite.rb

84 lines
2.5 KiB
Ruby

# frozen_string_literal: true
# == Schema Information
#
# Table name: invites
#
# id :bigint(8) not null, primary key
# user_id :bigint(8) not null
# code :string default(""), not null
# expires_at :datetime
# max_uses :integer
# uses :integer default(0), not null
# created_at :datetime not null
# updated_at :datetime not null
# autofollow :boolean default(FALSE), not null
# comment :text
#
class Invite < ApplicationRecord
include Expireable
# FIXME: make this a rails cfg key or whatev?
TH_USE_INVITE_QUOTA = !!ENV['TH_USE_INVITE_QUOTA']
TH_INVITE_MAX_USES = ENV.fetch('TH_INVITE_MAX_USES', 25).to_i
TH_ACTIVE_INVITE_SLOT_QUOTA = ENV.fetch('TH_ACTIVE_INVITE_SLOT_QUOTA', 40).to_i
belongs_to :user, inverse_of: :invites
has_many :users, inverse_of: :invite, dependent: nil
scope :available, -> { where(expires_at: nil).or(where('expires_at >= ?', Time.now.utc)) }
validates :comment, length: { maximum: 420 }
with_options if: :th_use_invite_quota?, unless: :created_by_moderator? do |invite|
invite.validates :expires_at, presence: true
invite.validate :expires_in_at_most_one_week?
invite.validates :max_uses, presence: true
# In Rails 6.1, numericality doesn't support :in
invite.validates :max_uses, numericality: { only_integer: true, greater_than: 0, less_than_or_equal_to: TH_INVITE_MAX_USES }
invite.validate :reasonable_outstanding_invite_count?
end
before_validation :set_code
def valid_for_use?
(max_uses.nil? || uses < max_uses) && !expired? && user&.functional?
end
private
def set_code
loop do
self.code = ([*('a'..'z'), *('A'..'Z'), *('0'..'9')] - %w(0 1 I l O)).sample(8).join
break if Invite.find_by(code: code).nil?
end
end
def created_by_moderator?
self.user.moderator
end
def th_use_invite_quota?
TH_USE_INVITE_QUOTA
end
def expires_in_at_most_one_week?
return if self.expires_in.to_i.seconds <= 1.week
# FIXME: Localize this
errors.add(:expires_in, 'must expire within one week')
end
def reasonable_outstanding_invite_count?
valid_invites = self.user.invites.filter { |i| i.valid_for_use? }
count = valid_invites.sum do |i|
next i.max_uses unless i.max_uses.nil?
errors.add(:max_uses, 'must not have any active unlimited-use invites')
return
end
return if count + max_uses <= TH_ACTIVE_INVITE_SLOT_QUOTA
errors.add(:max_uses, "must not exceed active invite slot quota of #{TH_ACTIVE_INVITE_SLOT_QUOTA}")
end
end