API Hdr

Example API Handler

step for create lambdaFunction and Api handler

in app/src

• add lambda, copy LambdaFunction.js and change name. ex. CreateProduct_Main.js

Example: 

'use strict';

const izaraSharedLib = require('@izara_project/izara-shared');
const dynamodbSharedLib = izaraSharedLib.dynamodbSharedLib;

const hash = require('object-hash');

//* require more module that you use


/**
 * description of function.
 * @param {string} type
 * @param {string} name
 *
 * @returns {string} productId
 */
module.exports.createProduct = async (
  _izContext,
  type,
  name
) => {

try {
    _izContext.logger.debug('CreateProduct: ', {
      type,
      name
    });

    // ... do something

    // ****  example for code ****

    //* create productId
    let productId = hash({
      type: type,
      name: name
    });
    _izContext.logger.debug("productId: ", productId);

    //* put record in ProductRecord table
    await dynamodbSharedLib.putItem(
      _izContext,
      dynamodbSharedLib.tableName("ProductRecord"),
      { //keyValue
        productId: productId //partition key
        // no sort key
      },
      { //add other attributes
        attributes: {
          type: type,
          name: name
        }
      }
    );

    return productId

  } catch (err) {
    _izContext.logger.error('error CreateProduct: ', err)
    throw (err)
  }
}

//Local testing
async function test() {

  const CorrelationIds = require('@izara_project/izara-core-library-correlation-ids');
  const Logger = require('@izara_project/izara-core-library-logger');
  const IntegrationTestDetail = require('@izara_project/izara-core-library-integration-tests/src/IntegrationTests')
  let _izContext = {
    correlationIds: CorrelationIds,
    logger: Logger,
    integrationTestDetail: IntegrationTestDetail
  }

  let type = "Clothes";
  let name = "Dream";

  return module.exports.updateCatalogSettings(
    _izContext,
    type,
    name
  )
}
test();

//** test => node CreateProduct_Main.js in terminal

• add lambda handler, copy LambdaFunctionHdrApi.js and change name ex. CreateProduct_HdrApi.js

Example: CreateProduct_HdrApi.js

'use strict';

const RBAC_TARGET_ID = process.env.iz_rbacTargetIdUser // iz_rbacTargetIdUser | iz_rbacDeliveryMethodId

const izara = require("@izara_project/izara-middleware");
const middleware = izara.middlewareHandler;
const createProduct = require('./CreateProduct_Main');

// not Authorizer : --------------------------------------------------------
// validate event params in middlewware before into function.
let validatorSchema = {
  type: "object",
  required: [
    'body',
    // 'requestContext'
  ],
  properties: {
    body: {
      type: 'object',
      // additionalProperties: false,
      required: [
        'type',
        'name'
      ],
      properties: {
        type: {
          type: 'string'
        },
        name: {
          type: 'string'
        }
      }
    }
  }
};
// NOTE: not sure about remap_when_flatten and remove_when_flatten function of api still require for validate or not? Tam(19-Nov) -- Yes

// // for auth userLevel
// If not have Authorizer set setMiddlewareSettings.
middleware.setValidatorSchema(
  validatorSchema,
  //{ noAuthorizer: true }
);

// // // defalse user Authorizer.
// middleware.setValidatorSchema(validatorSchema)

module.exports.main = middleware.wrap(async (event, context, callback) => {
  event._izContext.logger.debug('Event:', event);
  try {
    // invoke LambdaFunction
    let createProductResponse = await createProduct.createProduct(
      event._izContext,       // correlationId/logger/integrationTestDetail/uniqueRequestId/userId
      event.body.type,
      event.body.name
    );

    // return error to client
    if (createProductResponse instanceof Error) {
      return (izara.response.failure(createProductResponse));
    }

    // return success to client
    return (izara.response.success(createProductResponse));

  } catch (err) {
    event._izContext.logger.error('Error, CreateProduct_HdrApi: ', err);
    return (izara.response.failure(err));
  }
});

• function.yml

add lambda function For API handler

CreateProductApi:
  handler: src/CreateProduct_HdrApi.main
  name: ${self:custom.iz_resourcePrefix}CreateProductHdrApi
  events:
    - http:
        path: CreateProduct
        method: post
        cors: true
        # authorizer:
        #   arn: ${self:custom.iz_authorizerAppLevel}
        #   type: request
        #   resultTtlInSeconds: 0
  iamRoleStatements:
    - Effect: Allow
      Action:
        - dynamodb:PutItem
      Resource:
        - arn:aws:dynamodb:${self:custom.iz_region}:${self:custom.iz_accountId}:table/${self:custom.iz_resourcePrefix}Config
        - arn:aws:dynamodb:${self:custom.iz_region}:${self:custom.iz_accountId}:table/${self:custom.iz_resourcePrefix}ProductRecord

** maybe should close lambda that don't want to deploy **

• core-function.yml

add role in resource of InitialSetup and InitialSetupTestEnv

resource:
    - arn:aws:dynamodb:${self:custom.iz_region}:${self:custom.iz_accountId}:table/${self:custom.iz_resourcePrefix}Config
    - arn:aws:dynamodb:${self:custom.iz_region}:${self:custom.iz_accountId}:table/${self:custom.iz_resourcePrefix}ProductRecord
    - ${self:custom.iz_prefixIamRole}CreateProductApi${self:custom.iz_suffixIamRole} # eg. PutRolePolicy
    // add more....