aws-sf-choice

##### For using aws stepfunction choice json pattern

aws-sf-choice is json-condition pattern as aws asl pattern

aws stepfunction choice document:

https://docs.aws.amazon.com/step-functions/latest/dg/amazon-states-language-choice-state.html

Features

The following comparison operators are supported:

- And
- BooleanEquals,BooleanEqualsPath
- IsBoolean
- IsNull
- IsNumeric
- IsPresent
- IsString
- IsTimestamp
- Not
- NumericEquals,NumericEqualsPath
- NumericGreaterThan,NumericGreaterThanPath
- NumericGreaterThanEquals,NumericGreaterThanEqualsPath
- NumericLessThan,NumericLessThanPath
- NumericLessThanEquals,NumericLessThanEqualsPath
- Or
- StringEquals,StringEqualsPath
- StringGreaterThan,StringGreaterThanPath
- StringGreaterThanEquals,StringGreaterThanEqualsPath
- StringLessThan,StringLessThanPath
- StringLessThanEquals,StringLessThanEqualsPath
- TimestampEquals,TimestampEqualsPath
- TimestampGreaterThan,TimestampGreaterThanPath
- TimestampGreaterThanEquals,TimestampGreaterThanEqualsPath
- TimestampLessThan,TimestampLessThanPath
- TimestampLessThanEquals,TimestampLessThanEqualsPath

Install

``
npm install aws-sf-choice
`

Useage

`javascript
import {Choice } from 'aws-sf-choice'

let sampleCondition = {
Type: "Choice",
Choices: [
{
Variable: "$.r",
IsPresent: true,
Next: "nextState1"
},
{
Not:{
Variable: "$.r",
IsTimestamp: true,
},
Next: "nextState2",
}
],
Default: "DefaultState"
}

let sampleData = {
r : "this is sample text",
rr : 2
}

let choice = new Choice(sampleCondition,sampleData) // fist is condition , second is data
choice.start()
.then(r=>{
console.log("next state is : ",r)
})


`

start() method is promise function you could get next state by await`