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Versions: 10
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Contents
module ReportsKit
class RelativeTime
LETTERS_DURATION_METHODS = {
'y' => :years,
'M' => :months,
'w' => :weeks,
'd' => :days,
'h' => :hours,
'm' => :minutes,
's' => :seconds
}
LETTERS = LETTERS_DURATION_METHODS.keys.join
def self.parse(string, prevent_exceptions: false)
return Time.zone.now if string == 'now'
original_string = string
string = string.to_s.strip
is_negative = string[0, 1] == '-'
string = string[1..-1] if is_negative
result_string = is_negative ? '-' : ''
result_durations = []
string.scan(/(\d+)([#{LETTERS}]?)/) do |number, letter|
result_string += "#{number}#{letter}"
duration_method = LETTERS_DURATION_METHODS[letter]
unless duration_method
return if prevent_exceptions
raise ArgumentError.new("Invalid duration letter: #{letter.inspect}")
end
result_durations << number.to_i.public_send(duration_method)
end
if result_string == '-' || result_string != original_string.to_s.strip
return if prevent_exceptions
raise ArgumentError.new("Invalid time duration: #{original_string.inspect}")
end
duration = result_durations.reduce(&:+)
is_negative ? duration.ago : duration.from_now
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems