Stanko K.R.
37 lines
852 B
Ruby
37 lines
852 B
Ruby
class Account::JoinCode < ApplicationRecord
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CODE_LENGTH = 12
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USAGE_LIMIT_MAX = 10_000_000_000
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belongs_to :account
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validates :usage_limit, numericality: { less_than_or_equal_to: USAGE_LIMIT_MAX, message: "cannot be larger than the population of the planet" }
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scope :active, -> { where("usage_count < usage_limit") }
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before_create :generate_code, if: -> { code.blank? }
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def redeem_if(&block)
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with_lock do
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increment!(:usage_count) if active? && block.call(account)
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end
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end
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def active?
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usage_count < usage_limit
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end
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def reset
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generate_code
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self.usage_count = 0
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save!
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end
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private
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def generate_code
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self.code = loop do
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candidate = SecureRandom.base58(CODE_LENGTH).scan(/.{4}/).join("-")
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break candidate unless self.class.exists?(code: candidate)
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end
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end
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end
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