Class: Duration

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(hours = 0, minutes = 0) ⇒ Duration

Returns a new instance of Duration.



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# File 'lib/duration.rb', line 6

def initialize(hours=0, minutes=0)
    unless hours.is_a?(Integer) && minutes.is_a?(Integer)
        raise TypeError.new("Duration expects integer parameters.")
    end

    @hours=hours
    @minutes=minutes
end

Instance Attribute Details

#hours ⇒ Object

Returns the value of attribute hours.



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# File 'lib/duration.rb', line 4

def hours
  @hours
end

#minutes ⇒ Object

Returns the value of attribute minutes.



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# File 'lib/duration.rb', line 4

def minutes
  @minutes
end

Class Method Details

.from_minutes(mins) ⇒ Object 



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# File 'lib/duration.rb', line 77

def self.from_minutes(mins)
    newMinutes = mins % 60
    newHours = mins / 60
    Duration.new(newHours, newMinutes)
end

.try_convert(str) ⇒ Object 



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# File 'lib/duration.rb', line 29

def self.try_convert(str)
    floatValue = Float(str, exception: false)
    if floatValue
        parsedMinutes = floatValue * 60
        parsedHours = (parsedMinutes / 60).floor
        parsedMinutes = parsedMinutes % 60

        newDuration = Duration.new(parsedHours, parsedMinutes.round)
        return newDuration if newDuration.valid?
    end

    if str.include?("-")
        times = str.split("-")
        times.map! { |t|  t + (t.include?(":") ? "" : ":00") }

        begin
            startTime = Time.parse(times[0])
            endTime = Time.parse(times[1])
        rescue 
            return
        end

        minutesBetween = Integer((endTime - startTime) / 60, exception: false)
        return unless minutesBetween != nil

        parsedHours = minutesBetween / 60
        parsedMinutes = minutesBetween % 60

        newDuration = Duration.new(parsedHours, parsedMinutes)
        if newDuration.valid? then newDuration else nil end
    else
        parts=str.split(":")
        return unless parts.length == 2

        parsedHours = Integer(parts[0], exception: false)
        parsedMinutes = Integer(parts[1], exception: false)

        return if parsedMinutes == nil
        parsedHours = 0 if parsedHours == nil
        parsedHours = parsedHours + (parsedMinutes / 60)

        parsedMinutes = parsedMinutes % 60
        
        newDuration = Duration.new(parsedHours, parsedMinutes)
        if newDuration.valid? then newDuration else nil end
    end
end

Instance Method Details

#+(duration) ⇒ Object 



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# File 'lib/duration.rb', line 19

def +(duration)
    newMinutes = (@minutes + duration.minutes) % 60
    newHours = @hours + duration.hours + (@minutes + duration.minutes) / 60
    Duration.new(newHours, newMinutes)
end

#to_s ⇒ Object 



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# File 'lib/duration.rb', line 83

def to_s
    formattedHours = @hours.to_s.rjust(2, "0")
    formattedMinutes = @minutes.to_s.rjust(2, "0")
    return "#{formattedHours}:#{formattedMinutes}"
end

#total_minutes ⇒ Object 



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# File 'lib/duration.rb', line 25

def total_minutes()
    return @hours * 60 + @minutes
end

#valid? ⇒ Boolean

Returns:



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# File 'lib/duration.rb', line 15

def valid?
    @hours >= 0 && @minutes >= 0 && @minutes <= 59
end