event-mapper

event-mapper

About

Utility to map a dto to an event based on a json mapping definition.

Installation

$ npm install --save event-mapper

Usage

1.First of all create a folder and define some mapping definition files.

• The Name field is the name of the event.
• The Mapping object defines the fields that needs to be mapped from the dto to the event

{
    "Name": "TestEvent1",
    "Mapping": {
        "Field1": "FieldDest1",
        "Field2": "FieldDest2",
        "Field3": "SchemeData.FieldDest3"
    }
}

2.In your app, add the required dependencies and initialise the library for it to compile the mapping files.

var eventMapper = require('event-mapper');

var mappers = eventMapper.init('./test-definitions/');

    var dto = {
        "Field1": "12345",
        "Field2": "99999912345X",
        "Field3": 200
    };

var event = eventMapper.map(dto, mappers['TestEvent1']);

console.log(event);

//returns a structured json containing the event
// {
//   TestEvent1: {
//     FieldDest1: '12345',
//     FieldDest2: '99999912345X',
//     SchemeData: { FieldDest3: 200 }
//   }
// }

console.log(event.TestEvent1.SchemeData.FieldDest3);

//200


//Generating an event hash - eventMapper.generateEventHash('string_here')
var hash = eventMapper.generateEventHash('TestEvent1_65d6b12c-68a3-4518-a863-8082c3443410_19e72db8-dfd6-4bd4-92a5-8e8ba43455c1');
console.log(hash);

//output: 
//5a7210728bd4f27c0a142fc8ac808918