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Seconds-to-Duration Template Tag

Author:
danward
Posted:
March 27, 2009
Language:
Python
Version:
1.0
Score:
1 (after 2 ratings)

Does exactly what it says on the tin!

This template tag, when implemented, converts a duration (in seconds) to a more meaningful format. It has a short and long setting, which is easy to manipulate for your needs. Apologies if something already exists like this, however I felt that writing this would be quicker than trying to find it online.

As an example, given the duration 84658:

Short (default): 23 hrs 30 mins 58 secs

Long: 23 hours, 30 minutes and 58 seconds

All the best,

Dan Ward.

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# Import template library
from django import template

# Set register
register = template.Library()

# Register filter
@register.filter
def sectodur(value, arg = ''):
	
	"""
	#######################################################
	#                                                     #
	#   Seconds-to-Duration Template Tag                  #
	#   Dan Ward 2009 (http://d-w.me)                     #
	#                                                     #
	#######################################################
	
	Usage: {{ VALUE|sectodur[:"long"] }}
	
	NOTE: Please read up 'Custom template tags and filters'
	      if you are unsure as to how the template tag is
	      implemented in your project.
	"""
		
	# Place seconds in to integer
	secs = int(value)
	
	# If seconds are greater than 0
	if secs > 0:
		
		# Import math library
		import math
		
		# Place durations of given units in to variables
		daySecs = 86400
		hourSecs = 3600
		minSecs = 60
		
		# If short string is enabled
		if arg != 'long':
			
			# Set short names
			dayUnitName = ' day'
			hourUnitName = ' hr'
			minUnitName = ' min'
			secUnitName = ' sec'
			
			# Set short duration unit splitters
			lastDurSplitter = ' '
			nextDurSplitter = lastDurSplitter
		
		# If short string is not provided or any other value
		else:
			
			# Set long names
			dayUnitName = ' day'
			hourUnitName = ' hour'
			minUnitName = ' minute'
			secUnitName = ' second'
			
			# Set long duration unit splitters
			lastDurSplitter = ' and '
			nextDurSplitter = ', '
		
		# Create string to hold outout
		durationString = ''
		
		# Calculate number of days from seconds
		days = int(math.floor(secs / int(daySecs)))
		
		# Subtract days from seconds
		secs = secs - (days * int(daySecs))
		
		# Calculate number of hours from seconds (minus number of days)
		hours = int(math.floor(secs / int(hourSecs)))
		
		# Subtract hours from seconds
		secs = secs - (hours * int(hourSecs))
		
		# Calculate number of minutes from seconds (minus number of days and hours)
		minutes = int(math.floor(secs / int(minSecs)))
		
		# Subtract days from seconds
		secs = secs - (minutes * int(minSecs))
		
		# Calculate number of seconds (minus days, hours and minutes)
		seconds = secs
		
		# If number of days is greater than 0				
		if days > 0:
			
			# Add multiple days to duration string
			durationString += ' ' + str(days) + dayUnitName + (days > 1 and 's' or '')
		
		# Determine if next string is to be shown
		if hours > 0:

			# If there are no more units after this
			if minutes <= 0 and seconds <= 0:

				# Set hour splitter to last
				hourSplitter = lastDurSplitter

			# If there are unit after this
			else:

				# Set hour splitter to next
				hourSplitter = (len(durationString) > 0 and nextDurSplitter or '')
		
		# If number of hours is greater than 0				
		if hours > 0:

			# Add multiple days to duration string
			durationString += hourSplitter + ' ' + str(hours) + hourUnitName + (hours > 1 and 's' or '')
		
		# Determine if next string is to be shown
		if minutes > 0:
			
			# If there are no more units after this
			if seconds <= 0:
			
				# Set minute splitter to last
				minSplitter = lastDurSplitter
			
			# If there are unit after this
			else:
				
				# Set minute splitter to next
				minSplitter = (len(durationString) > 0 and nextDurSplitter or '')
		
		# If number of minutes is greater than 0				
		if minutes > 0:

			# Add multiple days to duration string
			durationString += minSplitter + ' ' + str(minutes) + minUnitName + (minutes > 1 and 's' or '')
		
		# Determine if next string is last
		if seconds > 0:
			
			# Set second splitter
			secSplitter = (len(durationString) > 0 and lastDurSplitter or '')
		
		# If number of seconds is greater than 0				
		if seconds > 0:

			# Add multiple days to duration string
			durationString += secSplitter + ' ' + str(seconds) + secUnitName + (seconds > 1 and 's' or '')
			
		# Return duration string
		return durationString.strip()
		
	# If seconds are not greater than 0
	else:
		
		# Provide 'No duration' message
		return 'No duration'

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