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from django import template
from django.core.urlresolvers import resolve, reverse, Resolver404, NoReverseMatch
from django.utils.encoding import smart_unicode, smart_str
from datetime import datetime, timedelta
from Bcfg2.Server.Reports.utils import filter_list
register = template.Library()
__PAGE_NAV_LIMITS__ = (10, 25, 50, 100)
@register.inclusion_tag('widgets/page_bar.html', takes_context=True)
def page_navigator(context):
"""
Creates paginated links.
Expects the context to be a RequestContext and views.prepare_paginated_list()
to have populated page information.
"""
fragment = dict()
try:
path = context['request'].path
total_pages = int(context['total_pages'])
records_per_page = int(context['records_per_page'])
except KeyError, e:
return fragment
except ValueError, e:
return fragment
if total_pages < 2:
return {}
try:
view, args, kwargs = resolve(path)
current_page = int(kwargs.get('page_number',1))
fragment['current_page'] = current_page
fragment['page_number'] = current_page
fragment['total_pages'] = total_pages
fragment['records_per_page'] = records_per_page
if current_page > 1:
kwargs['page_number'] = current_page - 1
fragment['prev_page'] = reverse(view, args=args, kwargs=kwargs)
if current_page < total_pages:
kwargs['page_number'] = current_page + 1
fragment['next_page'] = reverse(view, args=args, kwargs=kwargs)
view_range = 5
if total_pages > view_range:
pager_start = current_page - 2
pager_end = current_page + 2
if pager_start < 1:
pager_end += (1 - pager_start)
pager_start = 1
if pager_end > total_pages:
pager_start -= (pager_end - total_pages)
pager_end = total_pages
else:
pager_start = 1
pager_end = total_pages
if pager_start > 1:
kwargs['page_number'] = 1
fragment['first_page'] = reverse(view, args=args, kwargs=kwargs)
if pager_end < total_pages:
kwargs['page_number'] = total_pages
fragment['last_page'] = reverse(view, args=args, kwargs=kwargs)
pager = []
for page in range(pager_start, int(pager_end) + 1):
kwargs['page_number'] = page
pager.append( (page, reverse(view, args=args, kwargs=kwargs)) )
kwargs['page_number'] = 1
page_limits = []
for limit in __PAGE_NAV_LIMITS__:
kwargs['page_limit'] = limit
page_limits.append( (limit, reverse(view, args=args, kwargs=kwargs)) )
# resolver doesn't like this
del kwargs['page_number']
del kwargs['page_limit']
page_limits.append( ('all', reverse(view, args=args, kwargs=kwargs) + "|all") )
fragment['pager'] = pager
fragment['page_limits'] = page_limits
except Resolver404:
path = "404"
except NoReverseMatch, nr:
path = "NoReverseMatch: %s" % nr
except ValueError:
path = "ValueError"
#FIXME - Handle these
fragment['path'] = path
return fragment
@register.inclusion_tag('widgets/filter_bar.html', takes_context=True)
def filter_navigator(context):
try:
path = context['request'].path
view, args, kwargs = resolve(path)
# Strip any page limits and numbers
if 'page_number' in kwargs:
del kwargs['page_number']
if 'page_limit' in kwargs:
del kwargs['page_limit']
filters = []
for filter in filter_list:
if filter in kwargs:
myargs = kwargs.copy()
del myargs[filter]
filters.append( (filter, reverse(view, args=args, kwargs=myargs) ) )
filters.sort(lambda x,y: cmp(x[0], y[0]))
return { 'filters': filters }
except (Resolver404, NoReverseMatch, ValueError, KeyError):
pass
return dict()
def _subtract_or_na(mdict, x, y):
"""
Shortcut for build_metric_list
"""
try:
return round(mdict[x] - mdict[y], 4)
except:
return "n/a"
@register.filter
def build_metric_list(mdict):
"""
Create a list of metric table entries
Moving this here it simplify the view. Should really handle the case where these
are missing...
"""
td_list = []
# parse
td_list.append( _subtract_or_na(mdict, 'config_parse', 'config_download'))
#probe
td_list.append( _subtract_or_na(mdict, 'probe_upload', 'start'))
#inventory
td_list.append( _subtract_or_na(mdict, 'inventory', 'initialization'))
#install
td_list.append( _subtract_or_na(mdict, 'install', 'inventory'))
#cfg download & parse
td_list.append( _subtract_or_na(mdict, 'config_parse', 'probe_upload'))
#total
td_list.append( _subtract_or_na(mdict, 'finished', 'start'))
return td_list
@register.filter
def isstale(timestamp, entry_max=None):
"""
Check for a stale timestamp
Compares two timestamps and returns True if the
difference is greater then 24 hours.
"""
if not entry_max:
entry_max = datetime.now()
return entry_max - timestamp > timedelta(hours=24)
@register.filter
def sort_interactions_by_name(value):
"""
Sort an interaction list by client name
"""
inters = list(value)
inters.sort(lambda a,b: cmp(a.client.name, b.client.name))
return inters
class AddUrlFilter(template.Node):
def __init__(self, filter_name, filter_value):
self.filter_name = filter_name
self.filter_value = filter_value
self.fallback_view = 'Bcfg2.Server.Reports.reports.views.render_history_view'
def render(self, context):
link = '#'
try:
path = context['request'].path
view, args, kwargs = resolve(path)
filter_value = self.filter_value.resolve(context, True)
if filter_value:
filter_name = smart_str(self.filter_name)
filter_value = smart_unicode(filter_value)
kwargs[filter_name] = filter_value
# These two don't make sense
if filter_name == 'server' and 'hostname' in kwargs:
del kwargs['hostname']
elif filter_name == 'hostname' and 'server' in kwargs:
del kwargs['server']
try:
link = reverse(view, args=args, kwargs=kwargs)
except NoReverseMatch, rm:
link = reverse(self.fallback_view, args=None,
kwargs={ filter_name: filter_value })
except NoReverseMatch, rm:
raise rm
except (Resolver404, ValueError), e:
pass
return link
@register.tag
def add_url_filter(parser, token):
"""
Return a url with the filter added to the current view.
Takes a new filter and resolves the current view with the new filter
applied. Resolves to Bcfg2.Server.Reports.reports.views.client_history
by default.
{% add_url_filter server=interaction.server %}
"""
try:
tag_name, filter_pair = token.split_contents()
filter_name, filter_value = filter_pair.split('=', 1)
filter_name = filter_name.strip()
filter_value = parser.compile_filter(filter_value)
except ValueError:
raise template.TemplateSyntaxError, "%r tag requires exactly one argument" % token.contents.split()[0]
if not filter_name or not filter_value:
raise template.TemplateSyntaxError, "argument should be a filter=value pair"
return AddUrlFilter(filter_name, filter_value)
@register.filter
def sortwell(value):
"""
Sorts a list(or evaluates queryset to list) of bad, extra, or modified items in the best
way for presentation
"""
configItems = list(value)
configItems.sort(lambda x,y: cmp(x.entry.name, y.entry.name))
configItems.sort(lambda x,y: cmp(x.entry.kind, y.entry.kind))
return configItems
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