diff options
Diffstat (limited to 'activesupport/lib/active_support/duration/iso8601_parser.rb')
| -rw-r--r-- | activesupport/lib/active_support/duration/iso8601_parser.rb | 131 |
1 files changed, 66 insertions, 65 deletions
diff --git a/activesupport/lib/active_support/duration/iso8601_parser.rb b/activesupport/lib/active_support/duration/iso8601_parser.rb index 07af58ad99..e96cb8e883 100644 --- a/activesupport/lib/active_support/duration/iso8601_parser.rb +++ b/activesupport/lib/active_support/duration/iso8601_parser.rb @@ -1,4 +1,5 @@ -require 'strscan' +require "strscan" +require "active_support/core_ext/regexp" module ActiveSupport class Duration @@ -11,8 +12,8 @@ module ActiveSupport class ParsingError < ::ArgumentError; end PERIOD_OR_COMMA = /\.|,/ - PERIOD = '.'.freeze - COMMA = ','.freeze + PERIOD = ".".freeze + COMMA = ",".freeze SIGN_MARKER = /\A\-|\+|/ DATE_MARKER = /P/ @@ -20,8 +21,8 @@ module ActiveSupport DATE_COMPONENT = /(\-?\d+(?:[.,]\d+)?)(Y|M|D|W)/ TIME_COMPONENT = /(\-?\d+(?:[.,]\d+)?)(H|M|S)/ - DATE_TO_PART = { 'Y' => :years, 'M' => :months, 'W' => :weeks, 'D' => :days } - TIME_TO_PART = { 'H' => :hours, 'M' => :minutes, 'S' => :seconds } + DATE_TO_PART = { "Y" => :years, "M" => :months, "W" => :weeks, "D" => :days } + TIME_TO_PART = { "H" => :hours, "M" => :minutes, "S" => :seconds } DATE_COMPONENTS = [:years, :months, :days] TIME_COMPONENTS = [:hours, :minutes, :seconds] @@ -39,36 +40,36 @@ module ActiveSupport def parse! while !finished? case mode - when :start - if scan(SIGN_MARKER) - self.sign = (scanner.matched == '-') ? -1 : 1 - self.mode = :sign - else - raise_parsing_error - end - - when :sign - if scan(DATE_MARKER) - self.mode = :date - else - raise_parsing_error - end - - when :date - if scan(TIME_MARKER) - self.mode = :time - elsif scan(DATE_COMPONENT) - parts[DATE_TO_PART[scanner[2]]] = number * sign - else - raise_parsing_error - end - - when :time - if scan(TIME_COMPONENT) - parts[TIME_TO_PART[scanner[2]]] = number * sign - else - raise_parsing_error - end + when :start + if scan(SIGN_MARKER) + self.sign = (scanner.matched == "-") ? -1 : 1 + self.mode = :sign + else + raise_parsing_error + end + + when :sign + if scan(DATE_MARKER) + self.mode = :date + else + raise_parsing_error + end + + when :date + if scan(TIME_MARKER) + self.mode = :time + elsif scan(DATE_COMPONENT) + parts[DATE_TO_PART[scanner[2]]] = number * sign + else + raise_parsing_error + end + + when :time + if scan(TIME_COMPONENT) + parts[TIME_TO_PART[scanner[2]]] = number * sign + else + raise_parsing_error + end end end @@ -79,44 +80,44 @@ module ActiveSupport private - def finished? - scanner.eos? - end + def finished? + scanner.eos? + end - # Parses number which can be a float with either comma or period. - def number - scanner[1] =~ PERIOD_OR_COMMA ? scanner[1].tr(COMMA, PERIOD).to_f : scanner[1].to_i - end + # Parses number which can be a float with either comma or period. + def number + PERIOD_OR_COMMA.match?(scanner[1]) ? scanner[1].tr(COMMA, PERIOD).to_f : scanner[1].to_i + end - def scan(pattern) - scanner.scan(pattern) - end + def scan(pattern) + scanner.scan(pattern) + end - def raise_parsing_error(reason = nil) - raise ParsingError, "Invalid ISO 8601 duration: #{scanner.string.inspect} #{reason}".strip - end + def raise_parsing_error(reason = nil) + raise ParsingError, "Invalid ISO 8601 duration: #{scanner.string.inspect} #{reason}".strip + end - # Checks for various semantic errors as stated in ISO 8601 standard. - def validate! - raise_parsing_error('is empty duration') if parts.empty? + # Checks for various semantic errors as stated in ISO 8601 standard. + def validate! + raise_parsing_error("is empty duration") if parts.empty? - # Mixing any of Y, M, D with W is invalid. - if parts.key?(:weeks) && (parts.keys & DATE_COMPONENTS).any? - raise_parsing_error('mixing weeks with other date parts not allowed') - end + # Mixing any of Y, M, D with W is invalid. + if parts.key?(:weeks) && (parts.keys & DATE_COMPONENTS).any? + raise_parsing_error("mixing weeks with other date parts not allowed") + end - # Specifying an empty T part is invalid. - if mode == :time && (parts.keys & TIME_COMPONENTS).empty? - raise_parsing_error('time part marker is present but time part is empty') - end + # Specifying an empty T part is invalid. + if mode == :time && (parts.keys & TIME_COMPONENTS).empty? + raise_parsing_error("time part marker is present but time part is empty") + end - fractions = parts.values.reject(&:zero?).select { |a| (a % 1) != 0 } - unless fractions.empty? || (fractions.size == 1 && fractions.last == @parts.values.reject(&:zero?).last) - raise_parsing_error '(only last part can be fractional)' - end + fractions = parts.values.reject(&:zero?).select { |a| (a % 1) != 0 } + unless fractions.empty? || (fractions.size == 1 && fractions.last == @parts.values.reject(&:zero?).last) + raise_parsing_error "(only last part can be fractional)" + end - return true - end + return true + end end end end |