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require 'rubygems'
require 'sinatra'
require 'chronic'
require 'date'
require 'time'
require 'active_support'
require 'cgi'
require 'json'
module TimeAPI
ZoneOffset = {
'A' => +1,
'ADT' => -3,
'AKDT' => -8,
'AKST' => -9,
'AST' => -4,
'B' => +2,
'BST' => +1,
'C' => +3,
'CDT' => -5,
'CEDT' => +2,
'CEST' => +2,
'CET' => +1,
'CST' => -6,
'D' => +4,
'E' => +5,
'EDT' => -4,
'EEDT' => +3,
'EEST' => +3,
'EET' => +2,
'EST' => -5,
'F' => +6,
'G' => +7,
'GMT' => 0,
'H' => +8,
'HADT' => -9,
'HAST' => -10,
'I' => +9,
'IST' => +1,
'K' => +10,
'L' => +11,
'M' => +12,
'MDT' => -6,
'MSD' => +4,
'MSK' => +3,
'MST' => -7,
'N' => -1,
'O' => -2,
'P' => -3,
'PDT' => -7,
'PST' => -8,
'Q' => -4,
'R' => -5,
'S' => -6,
'T' => -7,
'U' => -8,
'UTC' => 0,
'V' => -9,
'W' => -10,
'WEDT' => +1,
'WEST' => +1,
'WET' => 0,
'X' => -11,
'Y' => -12,
'Z' => 0
}
class App < Sinatra::Default
set :sessions, false
set :run, false
set :environment, ENV['RACK_ENV']
def callback
(request.params['callback'] || '').gsub(/[^a-zA-Z0-9_]/, '')
end
def prefers_json?
(request.accept.first || '').downcase == 'application/json'
end
def json?
prefers_json? \
|| /\.json$/.match((params[:zone] || '').downcase) \
|| /\.json$/.match((params[:time] || '').downcase)
end
def jsonp?
json? && callback.present?
end
def format
format = (request.params.select { |k,v| v.blank? }.first || [nil]).first \
|| request.params['format'] \
|| (jsonp? ? '%B %d, %Y %H:%M:%S GMT%z' : '')
CGI.unescape(format).gsub('\\', '%')
end
get '/' do
erb :index
end
get '/favicon.ico' do
''
end
get '/:zone/?' do
parse(params[:zone])
end
get '/:zone/:time/?' do
parse(params[:zone], params[:time])
end
def parse(zone='UTC', time='now')
zone = zone.gsub(/\.json$/, '').upcase
offset = ZoneOffset[zone] || Integer(zone)
time = time \
.gsub(/\.json$/, '') \
.gsub(/^at /, '') \
.gsub(/(\d)h/, '\1 hours') \
.gsub(/(\d)min/, '\1 minutes') \
.gsub(/(\d)m/, '\1 minutes') \
.gsub(/(\d)sec/, '\1 seconds') \
.gsub(/(\d)s/, '\1 seconds')
if prefers_json?
response.headers['Content-Type'] = 'application/json'
end
Time.zone = offset
Chronic.time_class = Time.zone
time = Chronic.parse(time).to_datetime.to_s(format)
time = json? ? { 'dateString' => time }.to_json : time
time = jsonp? ? callback + '(' + time + ');' : time
end
end
end
class Time
def to_datetime
# Convert seconds + microseconds into a fractional number of seconds
seconds = sec + Rational(usec, 10**6)
# Convert a UTC offset measured in minutes to one measured in a
# fraction of a day.
offset = Rational(utc_offset, 60 * 60 * 24)
DateTime.new(year, month, day, hour, min, seconds, offset)
end
end
class DateTime
def to_datetime
self
end
def to_s(format='')
unless format.empty?
strftime(format)
else
strftime
end
end
end