"""Helper functions

Consists of functions to typically be used within templates, but also
available to Controllers. This module is available to both as 'h'.
"""
from webhelpers import *

_gb = 1000000000.0
_mb = 1000000.0
_kb = 1000.0

def format_size(size):
    if size > _gb:
        # Gb-level
        return '%.1fGb' % size/_gb
    elif size > _mb:
        if size > 10*_mb:
            return '%iMb' % size/_mb
        else:
            return '%.1fMb' % size/_mb
    elif size > _kb*2:
        return '%iKb' % size/_kb
    else:
        return '%i bytes' % size