/
passive_data_kit.py
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/
passive_data_kit.py
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# pylint: disable=line-too-long, no-member
import importlib
import arrow
from django import template
from django.template.loader import render_to_string
from django.utils import timezone
from ..models import DataSourceAlert
register = template.Library()
@register.tag(name="sources_table")
def sources_table(parser, token): # pylint: disable=unused-argument
try:
tag_name, query = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return SourcesTableNode(query)
class SourcesTableNode(template.Node):
def __init__(self, query):
self.query = template.Variable(query)
def render(self, context):
query = self.query.resolve(context)
context['sources'] = query
return render_to_string('tag_sources_table.html', context.flatten())
@register.tag(name="latest_point")
def latest_point(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" %
token.contents.split()[0])
return LatestPointNode(source)
class LatestPointNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
context['latest_point'] = source.latest_point()
return render_to_string('tag_latest_point.html', context.flatten())
@register.tag(name="point_count")
def point_count(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return PointCountNode(source)
class PointCountNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
return source.point_count()
@register.tag(name="point_hz")
def point_hz(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return PointHzNode(source)
class PointHzNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
frequency = source.point_frequency()
value = "{:10.3f}".format(frequency) + " Hz"
if frequency < 1.0:
value = "{:10.3f}".format(frequency * 1000) + " mHz"
tooltip = "{:10.3f}".format(frequency) + " samples per second"
if frequency < 1.0:
frequency *= 60
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per minute"
else:
frequency *= 60
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per hour"
else:
frequency *= 24
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per day"
else:
frequency *= 7
tooltip = "{:10.3f}".format(frequency) + " samples per week"
context['value'] = value
context['tooltip'] = tooltip
return render_to_string('tag_point_hz.html', context.flatten())
@register.tag(name="to_hz")
def to_hz(parser, token): # pylint: disable=unused-argument
try:
tag_name, frequency = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return ToHzNode(frequency)
class ToHzNode(template.Node):
def __init__(self, frequency):
self.frequency = template.Variable(frequency)
def render(self, context):
frequency = self.frequency.resolve(context)
value = "{:10.3f}".format(frequency) + " Hz"
if frequency < 1.0:
value = "{:10.3f}".format(frequency * 1000) + " mHz"
tooltip = "{:10.3f}".format(frequency) + " samples per second"
if frequency < 1.0:
frequency *= 60
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per minute"
else:
frequency *= 60
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per hour"
else:
frequency *= 24
if frequency > 1.0:
tooltip = "{:10.3f}".format(frequency) + " samples per day"
else:
frequency *= 7
tooltip = "{:10.3f}".format(frequency) + " samples per week"
context['value'] = value
context['tooltip'] = tooltip
return render_to_string('tag_point_hz.html', context.flatten())
@register.tag(name="date_ago")
def date_ago(parser, token): # pylint: disable=unused-argument
try:
tag_name, date_obj = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return DateAgoNode(date_obj)
class DateAgoNode(template.Node):
def __init__(self, date_obj):
self.date_obj = template.Variable(date_obj)
def render(self, context):
date_obj = self.date_obj.resolve(context)
if date_obj is None:
return 'None'
now = timezone.now()
diff = arrow.get(now.isoformat()).datetime - arrow.get(date_obj.isoformat()).datetime
ago_str = 'Unknown'
if diff.days > 0:
ago_str = str(diff.days) + 'd'
else:
minutes = diff.seconds / 60
if minutes >= 60:
ago_str = str(minutes / 60) + 'h'
else:
ago_str = str(minutes) + 'm'
context['ago'] = ago_str
context['date'] = date_obj
return render_to_string('tag_date_ago.html', context.flatten())
@register.tag(name="human_duration")
def tag_human_duration(parser, token): # pylint: disable=unused-argument
try:
tag_name, seconds_obj = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return HumanDurationNode(seconds_obj)
class HumanDurationNode(template.Node):
def __init__(self, seconds_obj):
self.seconds_obj = template.Variable(seconds_obj)
def render(self, context):
seconds_obj = self.seconds_obj.resolve(context)
if seconds_obj is None:
return ''
ago_str = str(seconds_obj) + 's'
if seconds_obj > (24.0 * 60 * 60):
ago_str = "{0:.2f}".format(seconds_obj / (24.0 * 60 * 60)) + 'd'
elif seconds_obj > (60.0 * 60):
ago_str = "{0:.2f}".format(seconds_obj / (60.0 * 60)) + 'h'
elif seconds_obj > 60.0:
ago_str = "{0:.2f}".format(seconds_obj / 60.0) + 'm'
context['human_duration'] = ago_str
context['seconds'] = seconds_obj
return render_to_string('tag_human_duration.html', context.flatten())
@register.tag(name="generators_table")
def generators_table(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return GeneratorsTableNode(source)
class GeneratorsTableNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
context['source'] = source
return render_to_string('tag_generators_table.html', context.flatten())
@register.tag(name="generator_label")
def generator_label(parser, token): # pylint: disable=unused-argument
try:
tag_name, generator_id = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return GeneratorLabelNode(generator_id)
class GeneratorLabelNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
context['source'] = source
return render_to_string('tag_generators_table.html', context.flatten())
@register.tag(name="system_alerts_table")
def system_alerts_table(parser, token): # pylint: disable=unused-argument
return SystemAlertsTableNode()
class SystemAlertsTableNode(template.Node):
def __init__(self):
pass
def render(self, context):
context['alerts'] = DataSourceAlert.objects.filter(active=True)
return render_to_string('tag_system_alerts_table.html', context.flatten())
@register.tag(name="system_alerts_badge")
def system_alerts_badge(parser, token): # pylint: disable=unused-argument
return SystemAlertsCountBadge()
class SystemAlertsCountBadge(template.Node):
def __init__(self):
pass
def render(self, context):
count = DataSourceAlert.objects.filter(active=True).count()
if count > 0:
return '<span class="badge pull-right">' + str(count) + '</span>'
return ''
@register.tag(name="source_alerts_table")
def source_alerts_table(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return SourceAlertsTableNode(source)
class SourceAlertsTableNode(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
context['alerts'] = DataSourceAlert.objects.filter(active=True, data_source=source)
return render_to_string('tag_source_alerts_table.html', context.flatten())
@register.tag(name="source_alerts_badge")
def source_alerts_badge(parser, token): # pylint: disable=unused-argument
try:
tag_name, source = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return SourceAlertsCountBadge(source)
class SourceAlertsCountBadge(template.Node):
def __init__(self, source):
self.source = template.Variable(source)
def render(self, context):
source = self.source.resolve(context)
count = DataSourceAlert.objects.filter(active=True, data_source=source).count()
if count > 0:
return '<span class="badge pull-right">' + str(count) + '</span>'
return ''
@register.tag(name="generator_name")
def generator_name(parser, token): # pylint: disable=unused-argument
try:
tag_name, generator = token.split_contents() # pylint: disable=unused-variable
except ValueError:
raise template.TemplateSyntaxError("%r tag requires a single argument" % \
token.contents.split()[0])
return GeneratorName(generator)
class GeneratorName(template.Node):
def __init__(self, generator):
self.generator = template.Variable(generator)
def render(self, context):
generator = self.generator.resolve(context)
try:
generator_module = importlib.import_module('.generators.' + generator.replace('-', '_'), package='passive_data_kit')
output = generator_module.generator_name(generator)
if output is not None:
return output
except ImportError:
pass
except AttributeError:
pass
return generator
@register.filter("to_datetime")
def to_datetime(value):
return arrow.get(value).datetime