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Coffee Shop Message

This is a little AWS Lambda function I've got hooked up to a Flic button at my work's fave coffee shop.

Like all good cafes they open early, and sometimes close early - particularly when they've sold out of salads, or it's a quiet afternoon. So the Flic sits on their wall, and when they're about to close they tap it... a few doors down our office gets a Slack message and we know to come get our last coffees of the day!

The Flic button on the wall at The Good Food Collective

The message as seen in our coffee-specific Slack channel

Setup

To install locally:

$ yarn

As input is required to run the function, the easiest way to see it in action is to run the integration tests documented below.

Then, to install on AWS using Terraform, see infrastructure/. You can then configure a Flic button to send POST requests to your new API whenever it is pressed!

Tests

To run all tests at once:

$ yarn test

Unit Tests

To run:

$ yarn unit-tests

Note that unit tests are yet to be written, and will currently just pass!!

Integration Tests

To run:

$ yarn docker-tests

Integration tests require Docker. They run in lambci/lambda:nodejs6.10 (GitHub | Docker Hub).

The following environment variables must be defined on your system:

  • SLACK_HOOK_DEV
  • SNS_TOPIC_DEV
  • AWS_ACCESS_KEY_ID
  • AWS_SECRET_ACCESS_KEY
  • AWS_DEFAULT_REGION
  • CI - optional

The final CI variable above is optional, but recommended. If set (which it is by default on Travis CI, for instance), it will cause errors to be thrown rather than returned as an API Gateway style response. If not set, tests will still 'pass', as errors will be mapped to a HTTP status code rather than thrown.

License

MIT.

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A little AWS Lambda function I've got hooked up to a Flic button at our fave coffee shop. Includes Terraform config for all necessary AWS resources.

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