Module: Timeprice::Granularity

Defined in:
lib/timeprice/granularity.rb

Overview

Closed set of CPI-resolution granularities and the rules for combining / rendering them. Owns the lattice so callers don’t hand-maintain it.

Constant Summary collapse

DAILY = 
:daily
MONTHLY = 
:monthly
ANNUAL = 
:annual
ANNUAL_FROM_MONTHLY_AVG = 
:annual_from_monthly_avg
MONTHLY_FROM_ANNUAL_FALLBACK = 
:monthly_from_annual_fallback
PRECEDENCE =

Most-degraded first — ‘merge` returns the first match. DAILY is the highest-precision FX tag; MONTHLY is the highest-precision CPI tag. Compare uses merge() across both legs, so the most-degraded tag in either leg wins.

[
  MONTHLY_FROM_ANNUAL_FALLBACK,
  ANNUAL_FROM_MONTHLY_AVG,
  ANNUAL,
  MONTHLY,
  DAILY,
].freeze
HUMAN_LABELS = 
{
  DAILY => "daily",
  MONTHLY => "monthly",
  ANNUAL => "annual",
  ANNUAL_FROM_MONTHLY_AVG => "annual (avg of months)",
  MONTHLY_FROM_ANNUAL_FALLBACK => "annual (month unavailable)",
}.freeze

Class Method Summary collapse

Class Method Details

.humanize(tag) ⇒ Object

Human-readable label for CLI output. Falls through to the symbol’s string form so an unknown tag still renders something.



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# File 'lib/timeprice/granularity.rb', line 42

def humanize(tag)
  HUMAN_LABELS.fetch(tag, tag.to_s)
end

.merge(*tags) ⇒ Object

Worst-precision-wins merge across two or more endpoint granularities.



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# File 'lib/timeprice/granularity.rb', line 36

def merge(*tags)
  PRECEDENCE.find { |t| tags.include?(t) } || MONTHLY
end