seahaven-door-unlock-api/lib/door-unlock-stack.ts

import * as cdk from "aws-cdk-lib";
import * as lambda from "aws-cdk-lib/aws-lambda";
import * as apigwv2 from "aws-cdk-lib/aws-apigatewayv2";
import * as integrations from "aws-cdk-lib/aws-apigatewayv2-integrations";
import * as ssm from "aws-cdk-lib/aws-ssm";
import * as route53 from "aws-cdk-lib/aws-route53";
import * as route53Targets from "aws-cdk-lib/aws-route53-targets";
import * as acm from "aws-cdk-lib/aws-certificatemanager";
import * as logs from "aws-cdk-lib/aws-logs";
import { Construct } from "constructs";
import * as path from "path";

export class DoorUnlockStack extends cdk.Stack {
  constructor(scope: Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const elementsApiKeyParam = ssm.StringParameter.fromSecureStringParameterAttributes(
      this,
      "ElementsApiKey",
      { parameterName: "/seahaven/door-unlock/elements-api-key" }
    );

    const authTokenParam = ssm.StringParameter.fromSecureStringParameterAttributes(
      this,
      "AuthToken",
      { parameterName: "/seahaven/door-unlock/auth-token" }
    );

    const doorIdParam = ssm.StringParameter.fromStringParameterName(
      this,
      "DoorId",
      "/seahaven/door-unlock/door-id"
    );

    const unlockHandler = new lambda.Function(this, "UnlockHandler", {
      runtime: lambda.Runtime.NODEJS_20_X,
      handler: "unlock-handler.handler",
      code: lambda.Code.fromAsset(path.join(__dirname, "../lambda"), {
        bundling: {
          image: lambda.Runtime.NODEJS_20_X.bundlingImage,
          local: {
            tryBundle(outputDir: string) {
              const { execSync } = require("child_process");
              execSync(
                `esbuild ${path.join(__dirname, "../lambda/unlock-handler.ts")} --bundle --platform=node --target=node20 --outfile=${path.join(outputDir, "unlock-handler.js")} --external:@aws-sdk/*`
              );
              return true;
            },
          },
        },
      }),
      environment: {
        ELEMENTS_API_KEY_PARAM: "/seahaven/door-unlock/elements-api-key",
        AUTH_TOKEN_PARAM: "/seahaven/door-unlock/auth-token",
        DOOR_ID_PARAM: "/seahaven/door-unlock/door-id",
      },
      timeout: cdk.Duration.seconds(10),
      memorySize: 128,
      logRetention: logs.RetentionDays.THREE_MONTHS,
    });

    elementsApiKeyParam.grantRead(unlockHandler);
    authTokenParam.grantRead(unlockHandler);
    doorIdParam.grantRead(unlockHandler);

    const httpApi = new apigwv2.HttpApi(this, "DoorUnlockApi", {
      apiName: "door-unlock-api",
    });

    const defaultStage = httpApi.defaultStage!.node.defaultChild as apigwv2.CfnStage;
    defaultStage.addPropertyOverride("DefaultRouteSettings", {
      ThrottlingBurstLimit: 5,
      ThrottlingRateLimit: 2,
    });

    httpApi.addRoutes({
      path: "/unlock",
      methods: [apigwv2.HttpMethod.GET],
      integration: new integrations.HttpLambdaIntegration(
        "UnlockIntegration",
        unlockHandler
      ),
    });

    const hostedZone = route53.HostedZone.fromHostedZoneAttributes(
      this,
      "SeaHavenZone",
      {
        hostedZoneId: "Z06652411XKH89KTZD3XA",
        zoneName: "seahaven.com",
      }
    );

    const certificate = acm.Certificate.fromCertificateArn(
      this,
      "WildcardCert",
      "arn:aws:acm:us-east-1:328440206208:certificate/a66c0994-90d4-410a-a1d9-5595c2a3fae3"
    );

    const domainName = new apigwv2.DomainName(this, "DoorUnlockDomain", {
      domainName: "doorunlock.seahaven.com",
      certificate,
    });

    new apigwv2.ApiMapping(this, "DoorUnlockMapping", {
      api: httpApi,
      domainName,
    });

    new route53.ARecord(this, "DoorUnlockARecord", {
      zone: hostedZone,
      recordName: "doorunlock",
      target: route53.RecordTarget.fromAlias(
        new route53Targets.ApiGatewayv2DomainProperties(
          domainName.regionalDomainName,
          domainName.regionalHostedZoneId
        )
      ),
    });

    new cdk.CfnOutput(this, "ApiUrl", {
      value: `https://doorunlock.seahaven.com/unlock`,
    });
  }
}