36 lines
1.1 KiB
Ruby
36 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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class PlanLimits < ApplicationRecord
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LimitUndefinedError = Class.new(StandardError)
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belongs_to :plan
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def exceeded?(limit_name, subject, alternate_limit: 0)
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limit = limit_for(limit_name, alternate_limit: alternate_limit)
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return false unless limit
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case subject
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when Integer
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subject >= limit
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when ActiveRecord::Relation
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# We intentionally not accept just plain ApplicationRecord classes to
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# enforce the subject to be scoped down to a relation first.
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#
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# subject.count >= limit value is slower than checking
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# if a record exists at the limit value - 1 position.
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subject.offset(limit - 1).exists?
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else
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raise ArgumentError, "#{subject.class} is not supported as a limit value"
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end
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end
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def limit_for(limit_name, alternate_limit: 0)
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limit = read_attribute(limit_name)
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raise LimitUndefinedError, "The limit `#{limit_name}` is undefined" if limit.nil?
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alternate_limit = alternate_limit.call if alternate_limit.respond_to?(:call)
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limits = [limit, alternate_limit]
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limits.map(&:to_i).select(&:positive?).min
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end
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end
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