Class: TimeRange

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

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(b = nil, e = Time.now, exclude_end = false, options = {}) ⇒ TimeRange 



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# File 'lib/timerange.rb', line 10

def initialize(b = nil, e = Time.now, exclude_end = false, options = {})
  if b.is_a?(Range)
    b, e, exclude_end = b.begin, b.end, b.exclude_end?
  end

  if b.is_a?(Hash)
    options, b, e, exclude_end = b, nil, nil, false
  elsif e.is_a?(Hash)
    options, e, exclude_end = e, nil, false
  end

  time_zone = options[:time_zone] || self.class.time_zone || Time.zone || "Etc/UTC"
  if time_zone.is_a?(ActiveSupport::TimeZone) or (time_zone = ActiveSupport::TimeZone[time_zone])
    # do nothing
  else
    raise "Unrecognized time zone"
  end
  b = time_zone.parse(b) if b.is_a?(String)
  e = time_zone.parse(e) if e.is_a?(String)
  if options[:time_zone]
    b = b.in_time_zone(b)
    e = e.in_time_zone(e)
  end

  if options[:duration]
    e = b + options[:duration]
    exclude_end = true
  end

  super(b, e, exclude_end)
end

Class Method Details

.bucket(period, time, options = {}) ⇒ Object 



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# File 'lib/timerange.rb', line 75

def self.bucket(period, time, options = {})
  time_zone = options[:time_zone] || Time.zone
  day_start = options[:day_start] || 0
  week_start = options[:week_start] || 6

  week_start = [:mon, :tue, :wed, :thu, :fri, :sat, :sun].index((options[:week_start] || :sun).to_sym)
  if !week_start
    raise "Unrecognized :week_start option"
  end

  time = time.to_time.in_time_zone(time_zone) - day_start.hours

  period = period.to_sym
  time =
    case period
    when :second
      time.change(usec: 0)
    when :minute
      time.change(sec: 0)
    when :hour
      time.change(min: 0)
    when :day
      time.beginning_of_day
    when :week
      # same logic as MySQL group
      weekday = (time.wday - 1) % 7
      (time - ((7 - week_start + weekday) % 7).days).midnight
    when :month
      time.beginning_of_month
    when :year
      time.beginning_of_year
    else
      raise "Invalid period"
    end

  time + day_start.hours
end

.today ⇒ Object 



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# File 'lib/timerange.rb', line 113

def self.today
  date = Date.today
  new(date, date).expand(:day)
end

.yesterday ⇒ Object 



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# File 'lib/timerange.rb', line 118

def self.yesterday
  date = Date.yesterday
  new(date, date).expand(:day)
end

Instance Method Details

#+(period) ⇒ Object 



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# File 'lib/timerange.rb', line 123

def +(period)
  self.class.new(self.begin + period, self.end + period, exclude_end?)
end

#-(period) ⇒ Object 



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

def -(period)
  self.class.new(self.begin - period, self.end - period, exclude_end?)
end

#bucket(period, time, options = {}) ⇒ Object 



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# File 'lib/timerange.rb', line 71

def bucket(period, time, options = {})
  self.class.bucket(period, time, options)
end

#expand(period, options = {}) ⇒ Object 



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# File 'lib/timerange.rb', line 55

def expand(period, options = {})
  e =
    if exclude_end? and self.end == bucket(period, self.end, options)
      self.end
    else
      bucket(period, self.end + 1.send(period), options)
    end
  self.class.new(bucket(period, self.begin, options), e, true)
end

#expand_start(period, options = {}) ⇒ Object 



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# File 'lib/timerange.rb', line 65

def expand_start(period, options = {})
  e = self.end
  e = e.in_time_zone(options[:time_zone]) if options[:time_zone]
  self.class.new(bucket(period, self.begin, options), e, exclude_end?)
end

#step(period, options = {}) {|arr.last| ... } ⇒ Object

should step expand by default? TODO return enum

Yields:

  • (arr.last) 


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# File 'lib/timerange.rb', line 44

def step(period, options = {}, &block)
  period = period.is_a?(Symbol) || period.is_a?(String) ? 1.send(period) : period
  arr = [self.begin]
  yield(arr.last) if block_given?
  while v = arr.last + period and cover?(v)
    yield(v) if block_given?
    arr << v
  end
  arr
end