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""" My tag library. """ |
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from django.template import Node, NodeList, Template, Context, Variable |
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from django.template import TemplateSyntaxError, VariableDoesNotExist, BLOCK_TAG_START, BLOCK_TAG_END, VARIABLE_TAG_STAR |
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T, VARIABLE_TAG_END, SINGLE_BRACE_START, SINGLE_BRACE_END, COMMENT_TAG_START, COMMENT_TAG_END |
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from django.template import get_library, Library, InvalidTemplateLibrary |
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from django.conf import settings |
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from django.utils.encoding import smart_str, smart_unicode |
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from django.utils.itercompat import groupby |
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from django.utils.safestring import mark_safe |
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register = Library() |
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class NowWithDeltaNode(Node): |
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def __init__(self, format_string, delta): |
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self.format_string = format_string |
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self.delta = delta |
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def render(self, context): |
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from datetime import datetime, timedelta |
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from django.utils.dateformat import DateFormat |
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td = timedelta(int(self.delta)) if self.delta else timedelta(0) |
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df = DateFormat(datetime.now() + td) |
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return df.format(self.format_string.strip('"')) |
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#@register.tag |
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def now_with_delta(parser, token): |
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""" |
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Displays the date, formatted according to the given string with delta. |
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Uses the same format as PHP's ``date()`` function; see http://php.net/date |
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for all the possible values. |
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Sample usage:: |
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Yesterday is {% now_with_delta "jS F Y H:i" -1 %} |
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Tomorrow is {% now_with_delta "jS F Y H:i" 1 %} |
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""" |
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bits = token.split_contents() |
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if len(bits) < 2: |
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raise TemplateSyntaxError, "%r statement takes at least 1 argument" % bits[0] |
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format_string = bits[1] |
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delta = None if len(bits) == 2 else bits[2] |
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return NowWithDeltaNode(format_string, delta) |
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now_with_delta = register.tag(now_with_delta) |
