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refactor consultation bed create and shift logic
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@sainak
sainak committed Sep 12, 2023
1 parent b5e482c commit 1159f83
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Showing 3 changed files with 539 additions and 152 deletions.
184 changes: 110 additions & 74 deletions care/facility/api/serializers/bed.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
from rest_framework.exceptions import ValidationError
from rest_framework.serializers import (
BooleanField,
DateTimeField,
IntegerField,
ListField,
ModelSerializer,
Expand Down Expand Up @@ -166,99 +167,133 @@ class ConsultationBedSerializer(ModelSerializer):

assets = ListField(child=UUIDField(), required=False, write_only=True)
assets_objects = AssetSerializer(source="assets", many=True, read_only=True)
start_date = DateTimeField(required=True)

class Meta:
model = ConsultationBed
exclude = ("deleted", "external_id")
read_only_fields = TIMESTAMP_FIELDS

def validate(self, attrs):
user = self.context["request"].user
if "consultation" in attrs and "bed" in attrs and "start_date" in attrs:
bed = attrs["bed"]
facilities = get_facility_queryset(user)
if not facilities.filter(id=bed.facility_id).exists():
raise PermissionError()

permitted_consultations = get_consultation_queryset(user)
consultation: PatientConsultation = get_object_or_404(
permitted_consultations.filter(id=attrs["consultation"].id)
)
if not consultation.patient.is_active:
raise ValidationError(
{"patient:": ["Patient is already discharged from CARE"]}
)

if consultation.facility_id != bed.facility_id:
raise ValidationError(
{"consultation": "Should be in the same facility as the bed"}
)
if "consultation" not in attrs:
raise ValidationError({"consultation": "This field is required."})
if "bed" not in attrs:
raise ValidationError({"bed": "This field is required."})
if "start_date" not in attrs:
raise ValidationError({"start_date": "This field is required."})

previous_consultation_bed = consultation.current_bed
if (
previous_consultation_bed
and previous_consultation_bed.bed == bed
and set(
previous_consultation_bed.assets.order_by(
"external_id"
).values_list("external_id", flat=True)
)
== set(attrs.get("assets", []))
):
raise ValidationError(
{"consultation": "These set of bed and assets are already assigned"}
user = self.context["request"].user
bed = attrs["bed"]

facilities = get_facility_queryset(user)
if not facilities.filter(id=bed.facility_id).exists():
raise ValidationError("You do not have access to this facility")

permitted_consultations = get_consultation_queryset(user).select_related(
"patient"
)
consultation: PatientConsultation = get_object_or_404(
permitted_consultations.filter(id=attrs["consultation"].id)
)
if (
not consultation.patient.is_active
or consultation.discharge_date
or consultation.death_datetime
):
raise ValidationError("Patient not active")

# bed validations
if consultation.facility_id != bed.facility_id:
raise ValidationError("Consultation and bed are not in the same facility")
if (
ConsultationBed.objects.filter(bed=bed, end_date__isnull=True)
.exclude(consultation=consultation)
.exists()
):
raise ValidationError("Bed is already in use")

# check whether the same set of bed and assets are already assigned
current_consultation_bed = consultation.current_bed
if (
not self.instance
and current_consultation_bed
and current_consultation_bed.bed == bed
and set(
current_consultation_bed.assets.order_by("external_id").values_list(
"external_id", flat=True
)

start_date = attrs["start_date"]
end_date = attrs.get("end_date", None)

qs = ConsultationBed.objects.filter(consultation=consultation)
# Validations based of the latest entry
if qs.exists():
latest_qs = qs.latest("id")
if start_date < latest_qs.start_date:
raise ValidationError(
{
"start_date": "Start date cannot be before the latest start date"
}
)
if end_date and end_date < latest_qs.start_date:
raise ValidationError(
{"end_date": "End date cannot be before the latest start date"}
)

# Conflict checking logic
existing_qs = ConsultationBed.objects.filter(bed=bed).exclude(
consultation=consultation
)
if existing_qs.filter(start_date__gt=start_date).exists():
raise ValidationError({"start_date": "Cannot create conflicting entry"})
if end_date:
if existing_qs.filter(
start_date__gt=end_date, end_date__lt=end_date
).exists():
raise ValidationError(
{"end_date": "Cannot create conflicting entry"}
)
== set(attrs.get("assets", []))
):
raise ValidationError("These set of bed and assets are already assigned")

# date validations
# note: end_date is for setting end date on current instance
current_start_date = attrs["start_date"]
current_end_date = attrs.get("end_date", None)
if current_end_date and current_end_date < current_start_date:
raise ValidationError(
{"end_date": "End date cannot be before the start date"}
)
if (
consultation.admission_date
and consultation.admission_date > current_start_date
):
raise ValidationError(
{"start_date": "Start date cannot be before the admission date"}
)

else:
# validations based on patients previous consultation bed
last_consultation_bed = (
ConsultationBed.objects.filter(consultation=consultation)
.exclude(id=self.instance.id if self.instance else None)
.order_by("id")
.last()
)
if (
last_consultation_bed
and current_start_date < last_consultation_bed.start_date
):
raise ValidationError(
{
"consultation": "Field is Required",
"bed": "Field is Required",
"start_date": "Field is Required",
}
{"start_date": "Start date cannot be before previous bed start date"}
)

# check bed occupancy conflicts
if (
not self.instance
and current_consultation_bed
and ConsultationBed.objects.filter(
Q(bed=current_consultation_bed.bed),
Q(start_date__lte=current_start_date)
| Q(end_date__gte=current_start_date),
).exists()
):
# validation for setting end date on current bed based on new bed start date
raise ValidationError({"start_date": "Cannot create conflicting entry"})

conflicting_beds = ConsultationBed.objects.filter(bed=bed)
if conflicting_beds.filter(
start_date__lte=current_start_date, end_date__gte=current_start_date
).exists():
raise ValidationError({"start_date": "Cannot create conflicting entry"})
if (
current_end_date
and conflicting_beds.filter(
start_date__lte=current_end_date, end_date__gte=current_end_date
).exists()
):
raise ValidationError({"end_date": "Cannot create conflicting entry"})
return super().validate(attrs)

def create(self, validated_data):
def create(self, validated_data) -> ConsultationBed:
consultation = validated_data["consultation"]

with transaction.atomic():
ConsultationBed.objects.filter(
end_date__isnull=True, consultation=consultation
).update(end_date=validated_data["start_date"])
if assets_ids := validated_data.pop("assets", None):
# we check assets in use here as they might have been in use in
# the previous bed
assets = (
Asset.objects.annotate(
is_in_use=Exists(
Expand All @@ -282,10 +317,11 @@ def create(self, validated_data):
)
.values_list("external_id", flat=True)
)
not_found_assets = list(set(assets_ids) - set(assets))
not_found_assets = set(assets_ids) - set(assets)
if not_found_assets:
raise ValidationError(
f"Some assets are not available - {' ,'.join(map(str, not_found_assets))}"
"Some assets are not available - "
f"{' ,'.join([str(x) for x in not_found_assets])}"
)
obj: ConsultationBed = super().create(validated_data)
if assets_ids:
Expand Down
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