Detect labels in images using S3, Lambda, Amazon Rekognition, and DynamoDB

import { Duration, Stack, StackProps, aws_lambda } from 'aws-cdk-lib';
import *  as s3 from 'aws-cdk-lib/aws-s3';
import * as lambda from 'aws-cdk-lib/aws-lambda';
import * as path from 'path';
import * as eventsources from 'aws-cdk-lib/aws-lambda-event-sources';
import * as ddb from 'aws-cdk-lib/aws-dynamodb';
import * as iam from 'aws-cdk-lib/aws-iam';
import { CfnOutput } from 'aws-cdk-lib'; 
import { Construct } from 'constructs';

export class S3LambdaRekognitionStack extends Stack {
  constructor(scope: Construct, id: string, props?: StackProps) {
    super(scope, id, props);
    //create new S3 bucket
    const bucket = new s3.Bucket(this, 'images-bucket', {
    })

  

  const dynamoTable = new ddb.Table(this, 'rekognition-table', {partitionKey: {name: 'file_name', type: ddb.AttributeType.STRING}})



  const lambdaFunction = new lambda.Function(this, 'lambdaFunction', {
    runtime: lambda.Runtime.PYTHON_3_9,
    code: lambda.Code.fromAsset(path.join(__dirname,'rekognitionLambda/')),
    handler: 'lambda_function.lambda_handler',
    environment: {
      'TABLE_NAME': dynamoTable.tableName
    }

})

bucket.grantRead(lambdaFunction)
dynamoTable.grantReadWriteData(lambdaFunction)

// Grant Lambda function to call Rekognition detect labels
lambdaFunction.role?.attachInlinePolicy(
  new iam.Policy(this, 'rekognitionDetectLabelsPolicy', {
    statements: [
      new iam.PolicyStatement({
        actions: ['rekognition:detectLabels'],
        resources: ['*'],
      })
    ],
  }),
);


  // add S3 event to lambda function
  lambdaFunction.addEventSource(new eventsources.S3EventSource(bucket, {
    events: [s3.EventType.OBJECT_CREATED],
  }))


new CfnOutput(this, 'bucketName', {
  value: bucket.bucketName,
  description: 'The name of the s3 bucket created.',
});

new CfnOutput(this, 'DynamoDBTable', {
    value: dynamoTable.tableName,
    description: 'The name of the DynamoDB table created.',
  });
  

}
}