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When we ask the CBC Proxy to send a message, we should specify that we want to send a real message, when we want a real message We will do this by specifying the message_type which can have 4 types, 3 of which represent a real message: | Name | Effect | | ------ | ------------------------ | | alert | Create an alert | | update | Update an existing alert | | cancel | Cancel an existing alert | | test | Send a link test | We will use message_type to represent the table above Signed-off-by: Toby Lorne <toby.lornewelch-richards@digital.cabinet-office.gov.uk> Co-authored-by: Richard <richard.baker@digital.cabinet-office.gov.uk> Co-authored-by: Pea <pea.tyczynska@digital.cabinet-office.gov.uk>
150 lines
3.9 KiB
Python
150 lines
3.9 KiB
Python
import json
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import boto3
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# The variable names in this file have specific meaning in a CAP message
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#
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# identifier is a unique field for each CAP message
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#
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# headline is a field which we are not sure if we will use
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#
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# description is the body of the message
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# areas is a list of dicts, with the following items
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# * description is a string which populates the areaDesc field
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# * polygon is a list of lat/long pairs
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#
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# references is a whitespace separated list of message identifiers
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# where each identifier is a previous sent message
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# ie a Cancel message would have a unique identifier but have the identifier of
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# the preceeding Alert message in the references field
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# Noop = no operation
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class CBCProxyNoopClient:
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def init_app(self, app):
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pass
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def send_canary(
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self,
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identifier,
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):
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pass
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def send_link_test(
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self,
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identifier,
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):
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pass
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def create_and_send_broadcast(
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self,
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identifier, headline, description, areas
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):
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pass
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# We have not implementated updating a broadcast
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def update_and_send_broadcast(
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self,
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identifier, references, headline, description, areas
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):
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pass
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# We have not implemented cancelling a broadcast
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def cancel_broadcast(
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self,
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identifier, references, headline, description, areas
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):
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pass
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class CBCProxyClient:
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def init_app(self, app):
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self._lambda_client = boto3.client(
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'lambda',
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region_name='eu-west-2',
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aws_access_key_id=app.config['CBC_PROXY_AWS_ACCESS_KEY_ID'],
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aws_secret_access_key=app.config['CBC_PROXY_AWS_SECRET_ACCESS_KEY'],
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)
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def send_canary(
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self,
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identifier,
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):
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payload_bytes = bytes(json.dumps({
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'identifier': identifier,
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}), encoding='utf8')
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result = self._lambda_client.invoke(
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FunctionName='canary',
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InvocationType='RequestResponse',
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Payload=payload_bytes,
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)
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if result['StatusCode'] > 299:
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raise Exception('Could not invoke lambda')
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if 'FunctionError' in result:
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raise Exception('Function exited with unhandled exception')
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def send_link_test(
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self,
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identifier,
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):
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payload_bytes = bytes(json.dumps({
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'message_type': 'test',
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'identifier': identifier,
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}), encoding='utf8')
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result = self._lambda_client.invoke(
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FunctionName='bt-ee-1-proxy',
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InvocationType='RequestResponse',
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Payload=payload_bytes,
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)
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if result['StatusCode'] > 299:
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raise Exception('Could not invoke lambda')
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if 'FunctionError' in result:
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raise Exception('Function exited with unhandled exception')
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def create_and_send_broadcast(
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self,
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identifier, headline, description, areas,
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):
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payload_bytes = bytes(json.dumps({
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'message_type': 'alert',
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'identifier': identifier,
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'headline': headline,
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'description': description,
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'areas': areas,
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}), encoding='utf8')
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result = self._lambda_client.invoke(
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FunctionName='bt-ee-1-proxy',
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InvocationType='RequestResponse',
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Payload=payload_bytes,
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)
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if result['StatusCode'] > 299:
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raise Exception('Could not invoke lambda')
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if 'FunctionError' in result:
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raise Exception('Function exited with unhandled exception')
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# We have not implementated updating a broadcast
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def update_and_send_broadcast(
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self,
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identifier, references, headline, description, areas,
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):
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pass
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# We have not implemented cancelling a broadcast
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def cancel_broadcast(
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self,
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identifier, references, headline, description, areas,
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):
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pass
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