from datetime import datetime from django.utils import timezone from django.utils.translation import ungettext, ugettext as _ def verbose_time(n, units): if n >= 5: return _("{n} {units} ago").format(n=int(n), units=units) return ungettext( _("{n:.1f} {s_units} ago"), _("{n:.1f} {units} ago"), n ).format(n=n, units=units, s_units=units[:-1]) OLDER_CHUNKS = ( (365.0, 'years'), (30.0, 'months'), (7.0, 'weeks'), ) def _un(singular__plural, n=None): singular, plural = singular__plural return ungettext(singular, plural, n) def naturaldatetime(date, show_seconds=False): """Convert datetime into a human natural date string.""" if not date: return '' right_now = timezone.now() today = datetime(right_now.year, right_now.month, right_now.day, tzinfo=right_now.tzinfo) delta = right_now - date delta_midnight = today - date days = delta.days hours = float(delta.seconds) / 3600 minutes = float(delta.seconds) / 60 seconds = delta.seconds days = abs(days) if days == 0: if int(hours) == 0: if minutes >= 1 or not show_seconds: return verbose_time(minutes, 'minutes') else: return verbose_time(seconds, 'seconds') else: return verbose_time(hours, 'hours') if delta_midnight.days == 0: date = timezone.localtime(date) return _("yesterday at {time}").format(time=date.strftime('%H:%M')) count = 0 for chunk, units in OLDER_CHUNKS: if days < 7.0: count = days + float(hours)/24 return verbose_time(count, 'days') if days >= chunk: count = (delta_midnight.days + 1) / chunk count = abs(count) return verbose_time(count, units) def naturaldate(date): if not date: return '' today = timezone.now().date() delta = today - date days = delta.days if days == 0: return _('today') elif days == 1: return _('yesterday') ago = ' ago' if days < 0: ago = '' days = abs(days) delta_midnight = today - date count = 0 for chunk, units in OLDER_CHUNKS: if days < 7.0: count = days fmt = verbose_time(count, 'days') return fmt.format(num=count, ago=ago) if days >= chunk: count = (delta_midnight.days + 1) / chunk count = abs(count) fmt = verbose_time(count, units) return fmt.format(num=count, ago=ago) def text2int(textnum, numwords={}): if not numwords: units = ( 'zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen', ) tens = ('', '', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety') scales = ['hundred', 'thousand', 'million', 'billion', 'trillion'] numwords['and'] = (1, 0) for idx, word in enumerate(units): numwords[word] = (1, idx) for idx, word in enumerate(tens): numwords[word] = (1, idx * 10) for idx, word in enumerate(scales): numwords[word] = (10 ** (idx * 3 or 2), 0) current = result = 0 for word in textnum.split(): word = word.lower() if word not in numwords: raise Exception("Illegal word: " + word) scale, increment = numwords[word] current = current * scale + increment if scale > 100: result += current current = 0 return result + current UNITS_CONVERSIONS = { 1024**4: ['TB', 'TiB', 'TERABYTES'], 1024**3: ['GB', 'GiB', 'GYGABYTES'], 1024**2: ['MB', 'MiB', 'MEGABYTES'], 1024: ['KB', 'KiB', 'KYLOBYTES'], 1: ['B', 'BYTES'], } def unit_to_bytes(unit): for bytes, units in UNITS_CONVERSIONS.items(): if unit in units: return bytes raise KeyError("%s is not a valid unit." % unit)