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import sys
from copy import copy
from django import template
from django.conf import settings
from django.core.urlresolvers import resolve, reverse, \
Resolver404, NoReverseMatch
from django.template.loader import get_template_from_string
from django.utils.encoding import smart_str
from django.utils.safestring import mark_safe
from datetime import datetime, timedelta
from Bcfg2.Reporting.utils import filter_list
from Bcfg2.Reporting.models import Group
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'].META['PATH_INFO']
total_pages = int(context['total_pages'])
records_per_page = int(context['records_per_page'])
except KeyError:
return fragment
except ValueError:
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 = sys.exc_info()[1]
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'].META['PATH_INFO']
view, args, kwargs = resolve(path)
except (Resolver404, KeyError):
return dict()
# Strip any page limits and numbers
if 'page_number' in kwargs:
del kwargs['page_number']
if 'page_limit' in kwargs:
del kwargs['page_limit']
# get a query string
qs = context['request'].GET.urlencode()
if qs:
qs = '?' + qs
filters = []
for filter in filter_list:
if filter == 'group':
continue
if filter in kwargs:
myargs = kwargs.copy()
del myargs[filter]
try:
filters.append((filter,
reverse(view, args=args, kwargs=myargs) + qs))
except NoReverseMatch:
pass
filters.sort(key=lambda x: x[0])
myargs = kwargs.copy()
selected = True
if 'group' in myargs:
del myargs['group']
selected = False
groups = []
try:
groups.append(('---',
reverse(view, args=args, kwargs=myargs) + qs,
selected))
except NoReverseMatch:
pass
for group in Group.objects.values('name'):
try:
myargs['group'] = group['name']
groups.append((group['name'],
reverse(view, args=args, kwargs=myargs) + qs,
group['name'] == kwargs.get('group', '')))
except NoReverseMatch:
pass
return {'filters': filters, 'groups': groups}
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 to 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(key=lambda a: a.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.Reporting.views.render_history_view'
def render(self, context):
link = '#'
try:
path = context['request'].META['PATH_INFO']
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_str(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:
link = reverse(self.fallback_view, args=None,
kwargs={filter_name: filter_value})
qs = context['request'].GET.urlencode()
if qs:
link += "?" + qs
except NoReverseMatch:
rm = sys.exc_info()[1]
raise rm
except (Resolver404, ValueError):
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.Reporting.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)
class MediaTag(template.Node):
def __init__(self, filter_value):
self.filter_value = filter_value
def render(self, context):
base = context['MEDIA_URL']
try:
request = context['request']
try:
base = request.environ['bcfg2.media_url']
except:
if request.path != request.META['PATH_INFO']:
offset = request.path.find(request.META['PATH_INFO'])
if offset > 0:
base = "%s/%s" % (request.path[:offset], \
context['MEDIA_URL'].strip('/'))
except:
pass
return "%s/%s" % (base, self.filter_value)
@register.tag
def to_media_url(parser, token):
"""
Return a url relative to the media_url.
{% to_media_url /bcfg2.css %}
"""
try:
filter_value = token.split_contents()[1]
filter_value = parser.compile_filter(filter_value)
except ValueError:
raise template.TemplateSyntaxError("%r tag requires exactly one argument" % token.contents.split()[0])
return MediaTag(filter_value)
@register.filter
def determine_client_state(entry):
"""
Determine client state.
This is used to determine whether a client is reporting clean or
dirty. If the client is reporting dirty, this will figure out just
_how_ dirty and adjust the color accordingly.
"""
if entry.state == 'clean':
return "clean-lineitem"
bad_percentage = 100 * (float(entry.bad_count) / entry.total_count)
if bad_percentage < 33:
thisdirty = "slightly-dirty-lineitem"
elif bad_percentage < 66:
thisdirty = "dirty-lineitem"
else:
thisdirty = "very-dirty-lineitem"
return thisdirty
@register.tag(name='qs')
def do_qs(parser, token):
"""
qs tag
accepts a name value pair and inserts or replaces it in the query string
"""
try:
tag, name, value = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError("%r tag requires exactly two arguments"
% token.contents.split()[0])
return QsNode(name, value)
class QsNode(template.Node):
def __init__(self, name, value):
self.name = template.Variable(name)
self.value = template.Variable(value)
def render(self, context):
try:
name = self.name.resolve(context)
value = self.value.resolve(context)
request = context['request']
qs = copy(request.GET)
qs[name] = value
return "?%s" % qs.urlencode()
except template.VariableDoesNotExist:
return ''
except KeyError:
if settings.TEMPLATE_DEBUG:
raise Exception("'qs' tag requires context['request']")
return ''
except:
return ''
@register.tag
def sort_link(parser, token):
'''
Create a sort anchor tag. Reverse it if active.
{% sort_link sort_key text %}
'''
try:
tag, sort_key, text = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError("%r tag requires at least four arguments" \
% token.split_contents()[0])
return SortLinkNode(sort_key, text)
class SortLinkNode(template.Node):
__TMPL__ = "{% load bcfg2_tags %}<a href='{% qs 'sort' key %}'>{{ text }}</a>"
def __init__(self, sort_key, text):
self.sort_key = template.Variable(sort_key)
self.text = template.Variable(text)
def render(self, context):
try:
try:
sort = context['request'].GET['sort']
except KeyError:
#fall back on this
sort = context.get('sort', '')
sort_key = self.sort_key.resolve(context)
text = self.text.resolve(context)
# add arrows
try:
sort_base = sort_key.lstrip('-')
if sort[0] == '-' and sort[1:] == sort_base:
text = text + '▼'
sort_key = sort_base
elif sort_base == sort:
text = text + '▲'
sort_key = '-' + sort_base
except IndexError:
pass
context.push()
context['key'] = sort_key
context['text'] = mark_safe(text)
output = get_template_from_string(self.__TMPL__).render(context)
context.pop()
return output
except:
if settings.DEBUG:
raise
raise
return ''
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