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https://github.com/GSA/notifications-api.git
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c0742fe83d
If a polygon is smaller than the largest polygon in our dataset of simplified polygons then we’re only throwing away useful detail by simplifying it. We should still simplify larger polygons as a fallback, to avoid sending anything to the CBC that we’re not sure it will like. The thresholds here are low: we can raise them as we test and experiment more. Here’s some data about the Flood Warning Service polygons Percentile | 80% | 90% | 95% | 98% | 99% | 99.9% -----------|-----|-------|--------|---------|---------|--------- Point count| 226 | 401.9 | 640.45 | 1015.38 | 1389.07 | 3008.609 Percentile | 80% | 90% | 95% | 98% | 99% | 99.9% --------------|-----|-------|--------|---------|---------|--------- Polygon count |2----|3------|5-------|8--------|10-------|40.469
104 lines
3.4 KiB
Python
104 lines
3.4 KiB
Python
from itertools import chain
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from flask import current_app, jsonify, request
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from notifications_utils.polygons import Polygons
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from notifications_utils.template import BroadcastMessageTemplate
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from app import api_user, authenticated_service
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from app.broadcast_message.translators import cap_xml_to_dict
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from app.dao.dao_utils import dao_save_object
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from app.models import BROADCAST_TYPE, BroadcastMessage, BroadcastStatusType
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from app.notifications.validators import check_service_has_permission
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from app.schema_validation import validate
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from app.v2.broadcast import v2_broadcast_blueprint
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from app.v2.broadcast.broadcast_schemas import post_broadcast_schema
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from app.v2.errors import BadRequestError, ValidationError
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from app.xml_schemas import validate_xml
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@v2_broadcast_blueprint.route("", methods=['POST'])
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def create_broadcast():
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check_service_has_permission(
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BROADCAST_TYPE,
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authenticated_service.permissions,
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)
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if request.content_type != 'application/cap+xml':
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raise BadRequestError(
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message=f'Content type {request.content_type} not supported',
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status_code=415,
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)
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cap_xml = request.get_data()
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if not validate_xml(cap_xml, 'CAP-v1.2.xsd'):
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raise BadRequestError(
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message='Request data is not valid CAP XML',
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status_code=400,
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)
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broadcast_json = cap_xml_to_dict(cap_xml)
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validate(broadcast_json, post_broadcast_schema)
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_validate_template(broadcast_json)
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polygons = Polygons(list(chain.from_iterable((
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[
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[[y, x] for x, y in polygon]
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for polygon in area['polygons']
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] for area in broadcast_json['areas']
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))))
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if len(polygons) > 12 or polygons.point_count > 250:
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simple_polygons = polygons.smooth.simplify
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else:
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simple_polygons = polygons
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broadcast_message = BroadcastMessage(
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service_id=authenticated_service.id,
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content=broadcast_json['content'],
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reference=broadcast_json['reference'],
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cap_event=broadcast_json['cap_event'],
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areas={
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'names': [
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area['name'] for area in broadcast_json['areas']
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],
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'simple_polygons': simple_polygons.as_coordinate_pairs_lat_long,
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},
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status=BroadcastStatusType.PENDING_APPROVAL,
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api_key_id=api_user.id,
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stubbed=authenticated_service.restricted
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# The client may pass in broadcast_json['expires'] but it’s
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# simpler for now to ignore it and have the rules around expiry
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# for broadcasts created with the API match those created from
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# the admin app
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)
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dao_save_object(broadcast_message)
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current_app.logger.info(
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f'Broadcast message {broadcast_message.id} created for service '
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f'{authenticated_service.id} with reference {broadcast_json["reference"]}'
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)
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return jsonify(broadcast_message.serialize()), 201
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def _validate_template(broadcast_json):
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template = BroadcastMessageTemplate.from_content(
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broadcast_json['content']
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)
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if template.content_too_long:
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raise ValidationError(
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message=(
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f'description must be {template.max_content_count:,.0f} '
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f'characters or fewer'
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) + (
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' (because it could not be GSM7 encoded)'
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if template.non_gsm_characters else ''
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),
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status_code=400,
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)
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