Class: ReeDatetime::OffsetToString

Inherits:
Object
  • Object
show all
Includes:
Ree::FnDSL
Defined in:
lib/ree_lib/packages/ree_datetime/package/ree_datetime/functions/offset_to_string.rb

Constant Summary collapse

MAX_OFFSET =
86_400
OFFSET_CACHE =
{}

Instance Method Summary collapse

Instance Method Details

#call(offset) ⇒ Object



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# File 'lib/ree_lib/packages/ree_datetime/package/ree_datetime/functions/offset_to_string.rb', line 13

def call(offset)
  return OFFSET_CACHE[offset] if OFFSET_CACHE.has_key?(offset)

  if !(-MAX_OFFSET..MAX_OFFSET).include?(offset)
    raise ArgumentError, "offset should be in (-#{MAX_OFFSET}..#{MAX_OFFSET})"
  end

  val = offset.abs
  hours = val / 3600
  minutes = (val % 3600) / 60
  str = "#{offset < 0 ? '-' : '+'}#{hours < 10 ? '0' : ''}#{hours}:#{minutes < 10 ? '0' : ''}#{minutes}"

  OFFSET_CACHE[offset] = str
end