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from django import template
import sublab_monitor
register = template.Library()
class HostStatusNode(template.Node):
def __init__(self, host):
self.host = host
def host_status(self, context):
if self not in context.render_context:
try:
context.render_context[self] = sublab_monitor.Storage('network_status')
except sublab_monitor.StorageError:
return None
storage = context.render_context[self]
try:
return storage.get(self.host)
except sublab_monitor.StorageError:
return None
def host_context(self, context):
context_data = {
'hostname': self.host,
'status': self.host_status(context)
}
return template.context.Context(context_data, autoescape=context.autoescape)
def render(self, context):
t = template.loader.get_template('sublab_monitor/host_status.html')
c = self.host_context(context)
return t.render(c)
@register.tag
def host_status(parser, token):
try:
tag_name, host = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError(
"%r tag requires a single argument" % token.contents.split()[0])
if not host[0] == host[-1] and host[0] in ('"', "'"):
raise template.TemplateSyntaxError(
"%r tag's argument should be in quotes" % token.contents.split()[0])
return HostStatusNode(host[1:-1])
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