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# frozen_string_literal: true
class Admin::Metrics::Measure::BaseMeasure
CACHE_TTL = 5.minutes.freeze
def self.with_params?
false
end
attr_reader :loaded
alias loaded? loaded
def initialize(start_at, end_at, params)
@start_at = start_at&.to_datetime
@end_at = end_at&.to_datetime
@params = params
@loaded = false
end
def cache_key
["metrics/measure/#{key}", @start_at, @end_at, canonicalized_params].join(';')
end
def key
raise NotImplementedError
end
def unit
nil
end
def total_in_time_range?
true
end
def total
load[:total]
end
def previous_total
load[:previous_total]
end
def data
load[:data]
end
def self.model_name
self.class.name
end
def read_attribute_for_serialization(key)
send(key) if respond_to?(key)
end
protected
def load
unless loaded?
@values = Rails.cache.fetch(cache_key, expires_in: CACHE_TTL) { perform_queries }.with_indifferent_access
@loaded = true
end
@values
end
def perform_queries
{
total: perform_total_query,
previous_total: perform_previous_total_query,
data: perform_data_query,
}
end
def perform_total_query
raise NotImplementedError
end
def perform_previous_total_query
raise NotImplementedError
end
def perform_data_query
raise NotImplementedError
end
def time_period
(@start_at..@end_at)
end
def previous_time_period
((@start_at - length_of_period)..(@end_at - length_of_period))
end
def length_of_period
@length_of_period ||= @end_at - @start_at
end
def params
{}
end
def canonicalized_params
params.to_h.to_a.sort_by { |k, _v| k.to_s }.map { |k, v| "#{k}=#{v}" }.join(';')
end
end