Class: Time

Inherits:
Object
  • Object
show all
Defined in:
lib/zones.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.month_num(str) ⇒ Object

get month number



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# File 'lib/zones.rb', line 98

def self.month_num(str)
  (@month_num ||= {
    "jan" => 1, "january"  =>  1, "jul" =>  7, "july"      =>  7,
    "feb" => 2, "february" =>  2, "aug" =>  8, "august"    =>  8,
    "mar" => 3, "march"    =>  3, "sep" =>  9, "septmeber" =>  9,
    "apr" => 4, "april"    =>  4, "oct" => 10, "october"   => 10,
    "may" => 5,                   "nov" => 11, "november"  => 11,
    "jun" => 6, "june"     =>  6, "dec" => 12, "december"  => 12,
  })[str.downcase] or raise "bad month: #{str}"
end

.parse_str(str, ignore_offset = false) ⇒ Object 



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# File 'lib/zones.rb', line 62

def self.parse_str(str, ignore_offset=false)
  case str
  when %r!^((?:19|20)\d\d)(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)?\.?(\d+)?([-+]\d\d:?\d\d)?!
    ymd = [$1.to_i, $2.to_i, $3.to_i]
    hms = [$4.to_i, $5.to_i, "#{$6}.#{$7}".to_f]
    off = $8.sub(/(\d)(\d\d)$/,'\1:\2') if $8 && !ignore_offset
  when %r!^
    (?:(0[1-9]|[12]\d|3[01]|[1-9][-/ ])[-/ ]? #  $1: day
       ((?>[a-z]{3,9}))[-/ ]?                 #  $2: month
       ((?>19|20)\d\d)                        #  $3: year
    | # or...
       ((?>19|20)\d\d)[-/]?                   #  $4: year
       (0[1-9]|1[012]|[1-9][-/])[-/]?         #  $5: month
       (0[1-9]|[12]\d|3[01]|[1-9][\sT])       #  $6: day
    | # or...
       (0[1-9]|1[012]|[1-9][-/])[-/]?         #  $7: month
       (0[1-9]|[12]\d|3[01]|[1-9][-/])[-/]?   #  $8: day
       ((?>19|20)\d\d)                        #  $9: year
    )\s?T?\s?
    (\d\d?)?                                  # $10: hour
    :?(\d\d)?                                 # $11: min
    :?(\d\d)?                                 # $12: sec
    \.?(\d+)?                                 # $13: dec
    \s?(?:(a|p)?m)?                           # $14: am/pm
    \s?(([-+])?(\d\d):?(\d\d)|UTC|GMT)?       # $15: offset ($16=sign, $17=hours, $18=mins)
  !iox
    ymd = $1 ? [$3.to_i, month_num($2), $1.to_i] : $4 ? [$4.to_i, $5.to_i, $6.to_i] : [$9.to_i, $7.to_i, $8.to_i]
    hms = [$14 ? ($10.to_i % 12) + (($14=="P" || $14=="p") ? 12 : 0) : $10.to_i, $11.to_i, "#{$12}.#{$13}".to_f]
    off = ($17 ? "#{$16||'+'}#{$17}:#{$18}" : "+00:00") if $15 && !ignore_offset
  else
    raise "can't parse: #{str}"
  end
  off ? [ymd, hms, off] : [ymd, hms]
end

.to_tz(str, to_tz = nil, ignore_offset = false) ⇒ Object

parse time and honor desired timezone



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# File 'lib/zones.rb', line 110

def self.to_tz(str, to_tz=nil, ignore_offset=false)
  ymd, hms, off = parse_str(str, ignore_offset)
  out = Time.new(*ymd, *hms, off)
  if to_tz
    if off
      out = out.to_tz(to_tz)
    else
      utc = out.utc
      off = TZInfo::Timezone.get(to_tz).utc_to_local(utc) - utc
      out = Time.new(*ymd, *hms, off)
    end
  else
    out
  end
end

.to_tz!(str, to_tz = nil) ⇒ Object

ignore supplied timezone, use local



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# File 'lib/zones.rb', line 127

def self.to_tz!(str, to_tz=nil)
  to_tz(str, to_tz, true)
end

Instance Method Details

#to_tz(to_tz) ⇒ Object

transform time to new timezone



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# File 'lib/zones.rb', line 132

def to_tz(to_tz)
  utc = utc? ? self : getutc
  raw = TZInfo::Timezone.get(to_tz).utc_to_local(utc)
  all = raw.to_a[1,5].reverse.push(strftime("%S.%6N").to_f) # retain fractional seconds
  out = Time.new(*all, raw - utc)
end

#to_tz!(to_tz) ⇒ Object

preserve time but change offset



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# File 'lib/zones.rb', line 140

def to_tz!(to_tz)
  all = to_a[1,5].reverse.push(strftime("%S.%6N").to_f) # retain fractional seconds
  raw = Time.utc(*all)
  utc = TZInfo::Timezone.get(to_tz).local_to_utc(raw)
  out = Time.new(*all, raw - utc)
end