discourse/lib/rate_limiter/limit_exceeded.rb

# frozen_string_literal: true

class RateLimiter

  def self.time_left(available_in)
    if available_in <= 3
      I18n.t("rate_limiter.short_time")
    elsif available_in < 1.minute.to_i
      I18n.t("rate_limiter.seconds", count: available_in)
    elsif available_in < 1.hour.to_i
      I18n.t("rate_limiter.minutes", count: (available_in / 1.minute.to_i))
    else
      I18n.t("rate_limiter.hours", count: (available_in / 1.hour.to_i))
    end
  end

  # A rate limit has been exceeded.
  class LimitExceeded < StandardError
    attr_reader :type, :available_in, :error_code

    def initialize(available_in, type = nil, error_code = nil)
      @available_in = available_in
      @type = type
      @error_code = error_code
    end

    def time_left
      @time_left ||= RateLimiter.time_left(@available_in)
    end

    def description
      if @type.present?
        type_key = @type.tr("-", "_")
        msg = I18n.t("rate_limiter.by_type.#{type_key}", time_left: time_left, default: "")
        return msg if msg.present?
      end

      I18n.t("rate_limiter.too_many_requests", time_left: time_left)
    end
  end

end