Module: Ucode::Audit::CodepointRangeCoalescer

Defined in:
lib/ucode/audit/codepoint_range_coalescer.rb

Overview

Coalesces a flat codepoint list into contiguous Models::Audit::CodepointRange instances.

Pure function: input is any Enumerable<Integer>, output is a sorted array of contiguous ranges. Used by Extractors::Coverage to produce the compact range view that is the default AuditReport shape.

Class Method Summary collapse

Class Method Details

.call(codepoints) ⇒ Array<Models::Audit::CodepointRange>

Returns contiguous, sorted.

Parameters:

  • codepoints (Enumerable<Integer>)

Returns:



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# File 'lib/ucode/audit/codepoint_range_coalescer.rb', line 16

def call(codepoints)
  return [] if codepoints.nil? || codepoints.empty?

  sorted = codepoints.sort.uniq
  ranges = []
  range_start = sorted[0]
  prev = sorted[0]

  sorted[1..].each do |cp|
    next if cp == prev

    if cp == prev + 1
      prev = cp
    else
      ranges << Models::Audit::CodepointRange.new(first_cp: range_start,
                                                  last_cp: prev)
      range_start = cp
      prev = cp
    end
  end
  ranges << Models::Audit::CodepointRange.new(first_cp: range_start,
                                              last_cp: prev)
  ranges
end