Class: NHKore::DatetimeParser

Inherits:
Object
  • Object
show all
Extended by:
AttrBool::Ext
Defined in:
lib/nhkore/datetime_parser.rb

Constant Summary collapse

FMTS =

Order matters!

[
  '%Y-%m-%d %H:%M',
  '%Y-%m-%d %H',
  '%Y-%m-%d',
  '%m-%d %H:%M',
  '%Y-%m %H:%M',
  '%m-%d %H',
  '%Y-%m %H',
  '%m-%d',
  '%Y-%m',
  '%d %H:%M',
  '%y %H:%M',
  '%d %H',
  '%Y %H',
  '%H:%M',
  '%d',
  '%Y',
].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(year = nil, month = nil, day = nil, hour = nil, min = nil, sec = nil) ⇒ DatetimeParser

Returns a new instance of DatetimeParser.



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# File 'lib/nhkore/datetime_parser.rb', line 158

def initialize(year=nil,month=nil,day=nil,hour=nil,min=nil,sec=nil)
  super()

  set!(year,month,day,hour,min,sec)

  self.has = false
  @min_or_max = false
end

Instance Attribute Details

#day ⇒ Object

Returns the value of attribute day.



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# File 'lib/nhkore/datetime_parser.rb', line 142

def day
  @day
end

#hour ⇒ Object

Returns the value of attribute hour.



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# File 'lib/nhkore/datetime_parser.rb', line 143

def hour
  @hour
end

#min ⇒ Object

Returns the value of attribute min.



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# File 'lib/nhkore/datetime_parser.rb', line 144

def min
  @min
end

#month ⇒ Object

Returns the value of attribute month.



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# File 'lib/nhkore/datetime_parser.rb', line 145

def month
  @month
end

#sec ⇒ Object

Returns the value of attribute sec.



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# File 'lib/nhkore/datetime_parser.rb', line 146

def sec
  @sec
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/nhkore/datetime_parser.rb', line 147

def year
  @year
end

Class Method Details

.guess_year(year) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 43

def self.guess_year(year)
  if year < 1000
    century = Util::JST_YEAR / 100 * 100 # 2120 -> 2100
    millennium = Util::JST_YEAR / 1000 * 1000 # 2120 -> 2000

    # If year <= 23 (2022 -> 23)...
    if year <= ((Util::JST_YEAR % 100) + 1)
      # Assume this century.
      year = century + year
    elsif year >= 100
      # If (2000 + 150) <= 2201 (if current year is 2200)...
      if (millennium + year) <= (Util::JST_YEAR + 1)
        # Assume this millennium.
        # So if the current year is 2200, and year is 150,
        # then it will be 2000 + 150 = 2150.
      else
        # Assume previous millennium (2000 -> 1000),
        # so year 999 will become 1999.
        millennium -= 1000 if millennium >= 1000
      end

      year = millennium + year
    else
      # Assume previous century (2000 -> 1900).
      century -= 100 if century >= 100
      year = century + year
    end
  end

  return year
end

.parse_range(value) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 75

def self.parse_range(value)
  # Do not use unspace_web_str(), want spaces for formats.
  value = Util.strip_web_str(Util.reduce_space(value))
  values = value.split('...',2)

  return nil if values.empty? # For '' or '...'

  # For '2020...' or '...2020'.
  if value.include?('...')
    # values.length is always 2 because of 2 in split() above.

    # For '2020...'.
    if Util.empty_web_str?(values[1])
      values[1] = :infinity
    # For '...2020'.
    elsif Util.empty_web_str?(values[0])
      values[0] = :infinity
    end
  end

  datetimes = [
    DatetimeParser.new, # "From" date time
    DatetimeParser.new, # "To" date time
  ]

  values.each_with_index do |v,i|
    dt = datetimes[i]

    # Minimum/Maximum date time for '2020...' or '...2020'.
    if v == :infinity
      # "From" date time.
      if i == 0
        dt.min!
      # "To" date time.
      else
        dt.max!
      end
    else
      v = Util.strip_web_str(v)

      FMTS.each_with_index do |fmt,j|
        # If don't do this, "%d" values will be parsed using "%d %H".
        # It seems as though strptime() ignores space.
        raise ArgumentError if fmt.include?(' ') && !v.include?(' ')

        # If don't do this, "%y..." values will be parsed using "%d...".
        raise ArgumentError if fmt.start_with?('%d') && v.split(' ')[0].length > 2

        dt.parse!(v,fmt)

        break # No problem; this format worked
      rescue ArgumentError
        # Out of formats.
        raise if j >= (FMTS.length - 1)
      end
    end
  end

  from = datetimes[0]
  to = datetimes[1]

  from.autofill!(:from,to)
  to.autofill!(:to,from)

  return [from.jst_time,to.jst_time]
end

Instance Method Details

#autofill!(type, other) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 167

def autofill!(type,other)
  case type
  when :from
    is_from = true
  when :to
    is_from = false
  else
    raise ArgumentError,"invalid type[#{type}]"
  end

  return self if @min_or_max

  has_small = false
  jst_now = Util.jst_now

  # Must be from smallest to biggest.

  if @has_sec || other.has_sec?
    @sec = other.sec unless @has_sec
    has_small = true
  else
    if has_small
      @sec = jst_now.sec
    else
      @sec = is_from ? 0 : 59
    end
  end

  if @has_min || other.has_min?
    @min = other.min unless @has_min
    has_small = true
  else
    if has_small
      @min = jst_now.min
    else
      @min = is_from ? 0 : 59
    end
  end

  if @has_hour || other.has_hour?
    @hour = other.hour unless @has_hour
    has_small = true
  else
    if has_small
      @hour = jst_now.hour
    else
      @hour = is_from ? 0 : 23
    end
  end

  if @has_day || other.has_day?
    @day = other.day unless @has_day
    has_small = true
  else
    if has_small
      @day = jst_now.day
    else
      @day = is_from ? 1 : :last_day
    end
  end

  if @has_month || other.has_month?
    @month = other.month unless @has_month
    has_small = true
  else
    if has_small
      @month = jst_now.month
    else
      @month = is_from ? 1 : 12
    end
  end

  if @has_year || other.has_year?
    @year = other.year unless @has_year
    has_small = true # rubocop:disable Lint/UselessAssignment
  else
    if has_small
      @year = jst_now.year
    else
      @year = is_from ? Util::MIN_SANE_YEAR : jst_now.year
    end
  end

  # Must be after setting @year & @month.
  if @day == :last_day
    @day = Date.new(@year,@month,-1).day
  end

  return self
end

#has=(value) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 303

def has=(value)
  @has_day = value
  @has_hour = value
  @has_min = value
  @has_month = value
  @has_sec = value
  @has_year = value
end

#jst_time ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 312

def jst_time
  return Util.jst_time(time)
end

#max! ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 258

def max!
  @min_or_max = true

  # Ex: 2020-12-31 23:59:59
  return set!(Util::JST_YEAR,12,31,23,59,59)
end

#min! ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 265

def min!
  @min_or_max = true

  # Ex: 1924-01-01 00:00:00
  return set!(Util::MIN_SANE_YEAR,1,1,0,0,0)
end

#parse!(value, fmt) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 272

def parse!(value,fmt)
  value = Time.strptime(value,fmt,&self.class.method(:guess_year))

  @has_day = fmt.include?('%d')
  @has_hour = fmt.include?('%H')
  @has_min = fmt.include?('%M')
  @has_month = fmt.include?('%m')
  @has_sec = fmt.include?('%S')
  @has_year = fmt.include?('%Y')

  @day = value.day if @has_day
  @hour = value.hour if @has_hour
  @min = value.min if @has_min
  @month = value.month if @has_month
  @sec = value.sec if @has_sec
  @year = value.year if @has_year

  return self
end

#set!(year = nil, month = nil, day = nil, hour = nil, min = nil, sec = nil) ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 292

def set!(year=nil,month=nil,day=nil,hour=nil,min=nil,sec=nil)
  @year = year
  @month = month
  @day = day
  @hour = hour
  @min = min
  @sec = sec

  return self
end

#time ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 316

def time
  return Time.new(@year,@month,@day,@hour,@min,@sec)
end

#to_s ⇒ Object 



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# File 'lib/nhkore/datetime_parser.rb', line 320

def to_s
  return "#{@year}-#{@month}-#{@day} #{@hour}:#{@min}:#{@sec}"
end