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sensor.py
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sensor.py
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import logging
from django.shortcuts import render, redirect
from django.views.generic import TemplateView
from ..event_check import require_event_code
from ag_data.models import AGSensor, AGSensorType
from mercury.models import GFConfig
from django.contrib import messages
from mercury.grafanaAPI.grafana_api import Grafana
log = logging.getLogger(__name__)
log.setLevel(logging.ERROR)
def validate_add_sensor_inputs(sensor_name, request):
"""This validates the form before a user submits a new sensor to prevent bad inputs"""
form_valid = True
# no sensor name
if not sensor_name:
messages.error(request, "FAILED: Sensor name is missing or invalid.")
form_valid = False
# duplicated sensor name
if AGSensor.objects.filter(name=sensor_name).count() > 0:
messages.error(request, "FAILED: Sensor name is already taken.")
form_valid = False
return form_valid, request
def validate_add_sensor_type_inputs(type_name, field_name_list, request):
"""
This validates the form before a user submits a new sensor type to prevent bad inputs
"""
form_valid = True
# no type name
if not type_name:
messages.error(request, "FAILED: Type name is missing or invalid.")
form_valid = False
# missing field names
for name in field_name_list:
if not name:
messages.error(request, "FAILED: Type has missing field name(s).")
form_valid = False
# duplicated type name
if AGSensorType.objects.filter(name=type_name).count() > 0:
messages.error(request, "FAILED: Type name is already taken.")
form_valid = False
# duplicated field names
if len(field_name_list) > len(set(field_name_list)):
messages.error(request, "FAILED: Field names must be unique.")
form_valid = False
return form_valid, request
def validate_update_sensor_type_inputs(
type_name, field_name_list, type_to_update, request
):
"""
This validates the form before a user submits a new sensor type to prevent bad inputs
"""
form_valid = True
# no type name
if not type_name:
messages.error(request, "FAILED: Type name is missing or invalid.")
form_valid = False
# missing field names
for name in field_name_list:
if not name:
messages.error(request, "FAILED: Type has missing field name(s).")
form_valid = False
# duplicated type name
for sensor_type in AGSensorType.objects.all():
if sensor_type.name == type_name and sensor_type != type_to_update:
messages.error(request, "FAILED: Type name is already taken.")
form_valid = False
# duplicated field names
if len(field_name_list) > len(set(field_name_list)):
messages.error(request, "FAILED: Field names must be unique.")
form_valid = False
return form_valid, request
def delete_sensor(request, sensor_id):
"""This deletes a sensor from the database based on user button click"""
sensor_to_delete = AGSensor.objects.get(id=sensor_id)
sensor_to_delete.delete()
return redirect("/sensor")
def delete_sensor_type(request, type_id):
"""This deletes a sensor type from the database based on user button click"""
for (
sensor
) in (
AGSensor.objects.all()
): # delete sensors with this type first to avoid foreignkey error
sensor.delete()
type_to_delete = AGSensorType.objects.get(id=type_id)
type_to_delete.delete()
return redirect("/sensor")
def update_sensor(request, sensor_id):
"""This updates a sensor in the database based on user input"""
sensor_to_update = AGSensor.objects.get(id=sensor_id)
sensor_name = request.POST.get("edit-sensor-name")
# reformat then validate name to avoid duplicated names or bad inputs like " "
sensor_name = sensor_name.strip().lower() # remove excess whitespace and CAPS
valid, request = validate_add_sensor_inputs(sensor_name, request)
if valid:
sensor_to_update.name = sensor_name
sensor_to_update.save()
return redirect("/sensor")
def update_sensor_type(request, type_id):
"""This updates a sensor type in the database based on user input"""
type_to_update = AGSensorType.objects.get(id=type_id)
type_name = request.POST.get("edit-type-name")
field_names = request.POST.getlist("edit-field-names")
field_types = request.POST.getlist("edit-data-types")
field_units = request.POST.getlist("edit-units")
# reformat then validate inputs to avoid duplicated names or bad inputs like " "
type_name = type_name.strip().lower() # remove excess whitespace and CAPS
field_names = [string.strip().lower() for string in field_names]
valid, request = validate_update_sensor_type_inputs(
type_name, field_names, type_to_update, request
)
# create sensor format which is dictionary of dictionaries
type_format = {}
fields = zip(field_names, field_types, field_units)
for field in fields:
type_format[field[0]] = {"data_type": field[1], "unit": field[2]}
if valid:
type_to_update.name = type_name
type_to_update.processing_formula = 0
type_to_update.format = type_format
type_to_update.save()
return redirect("/sensor")
class CreateSensorView(TemplateView):
"""This is the view for creating a new event."""
template_name = "sensor.html"
@require_event_code
def get(self, request, *args, **kwargs):
sensors = AGSensor.objects.all()
sensor_types = AGSensorType.objects.all()
context = {"sensors": sensors, "sensor_types": sensor_types}
return render(request, self.template_name, context)
@require_event_code
def post(self, request, *args, **kwargs):
if "submit_new_type" in request.POST:
type_name = request.POST.get("type-name")
field_names = request.POST.getlist("field-names")
field_types = request.POST.getlist("data-types")
field_units = request.POST.getlist("units")
# reformat then validate inputs to avoid duplicated names or bad inputs like " "
type_name = type_name.strip().lower() # remove excess whitespace and CAPS
field_names = [string.strip().lower() for string in field_names]
valid, request = validate_add_sensor_type_inputs(
type_name, field_names, request
)
# create sensor format which is dictionary of dictionaries
type_format = {}
fields = zip(field_names, field_types, field_units)
for field in fields:
type_format[field[0]] = {"data_type": field[1], "unit": field[2]}
sensors = AGSensor.objects.all() # for when we return context later
if valid:
new_type = AGSensorType.objects.create(
name=type_name, processing_formula=0, format=type_format
)
new_type.save()
sensor_types = AGSensorType.objects.all()
context = {
"sensor_types": sensor_types,
"sensors": sensors,
}
else:
sensor_types = AGSensorType.objects.all()
context = {
"sensor_types": sensor_types,
"type_name": type_name,
"type_format": type_format,
"sensors": sensors,
}
return render(request, self.template_name, context)
elif "submit_new_sensor" in request.POST:
sensor_name = request.POST.get("sensor-name")
sensor_type = request.POST.get("select-sensor-type")
sensor_type = AGSensorType.objects.get(
name=sensor_type
) # str --> AGSensorType
# reformat then validate name to avoid duplicated names or bad inputs like " "
sensor_name = (
sensor_name.strip().lower()
) # remove excess whitespace and CAPS
valid, request = validate_add_sensor_inputs(sensor_name, request)
sensor_types = (
AGSensorType.objects.all()
) # for when we return context later
if valid:
new_sensor = AGSensor.objects.create(
name=sensor_name, type_id=sensor_type
)
new_sensor.save()
gf_configs = GFConfig.objects.all()
if len(gf_configs) > 0:
gf_config = gf_configs[0]
# make sure that a grafana dashboard already exists, and if one
# doesn't, skip this process entirely - it will be handled when
# the dashboard is created
if gf_config.gf_dashboard_uid:
grafana = Grafana(gf_config.gf_host, gf_config.gf_token)
grafana.add_panel(new_sensor, gf_config.gf_dashboard_uid)
sensors = AGSensor.objects.all()
context = {
"sensors": sensors,
"sensor_types": sensor_types,
}
else:
sensors = AGSensor.objects.all()
context = {
"sensors": sensors,
"sensor_name": sensor_name,
"sensor_type": sensor_type,
"sensor_types": sensor_types,
}
return render(request, self.template_name, context)