Everyware Utility Functions

This package contains a number of useful types and functions used in Lambda functions.

Environment Variables

These functions make use of a number of environment variables. Make sure these are set correctly.

• SQS_DELAY_SECONDS
• TARGET_ENV

Types

EverywareSample

The type required for all samples pushed to the ingestion pipeline

Functions

interface sendMessage {
    (data: string, queueName = process.env.OUTPUT_QUEUE): Promise<SendMessageCommandOutput>
}

interface sendErrorMessage {
    (
        lambdaName: string,
        errorType: string,
        dataString: string,
        errorString: string,
        queueName = process.env.OUTPUT_QUEUE
    ): Promise<SendMessageCommandOutput>
}

/* takes a sample and:
    - checks the MTC, DeviceID exists
    - sets device status and lastSampleAt
    - updates the measure data
*/
interface updateMeasure {
    (sample: EverywareSample): Promise<boolean>
}

/*
    takes the body value from the lambda argument
    returns a valid EverywareSample object
    throws and error if body value is null or not valid
*/
interface validateEverywareSample {
    (body: string): EverywareSample
}

logger

this is a winston logger object configured with a custom format and transport.

The log level is determined by the LOG_LEVEL environment variable, range "0" (least verbose) to "6" (most verbose).

Example usage:

logger.log()
logger.error()

export { type EverywareSample } from './lib/types.ts' export { headers } from './lib/headers.ts'

Updating This NPM Package

To build the NPM module:

• increment the version in the build_npm.ts file.

$ deno run -A build_npm.ts
$ cd npm
$ npm publish --access public

$ deno run -A build_npm.ts && cd npm && npm publish --access public && cd ..

When a new version is published make sure you update the version in each of the package.json files and npm install.

npm list everywareuk