Offload HttpApi construction to another file

NChitty · Mar 29, 2024 · b40a437 · b40a437
1 parent 9d77a3c
commit b40a437
Show file tree

Hide file tree

Showing 2 changed files with 59 additions and 25 deletions.
diff --git a/cdk/lib/application-layer.ts b/cdk/lib/application-layer.ts
@@ -14,6 +14,7 @@ import {
   RecordTarget,
 } from 'aws-cdk-lib/aws-route53';
 import { ApiGatewayDomain } from 'aws-cdk-lib/aws-route53-targets';
+import { MealPlannerHttpApi } from './constructs/api';
 
 export interface ApplicationLayerStackProps extends StackProps {
   readonly delegationRole: Role;
@@ -73,31 +74,10 @@ export default class ApplicationLayerStack extends Stack {
       delegationRole: props.delegationRole,
     });
 
-    const domainName = ['api', props.domain].join('.');
-    const certificate = new Certificate(this, 'ApiDomainCertificate', {
-      domainName,
-      validation: CertificateValidation.fromDns(hostedZone),
-    });
-    const api = new LambdaRestApi(this, 'MealPlannerApi', {
-      handler,
-      proxy: true,
-      domainName: {
-        domainName,
-        certificate,
-        basePath: 'mealplanner',
-      },
-      disableExecuteApiEndpoint: true,
-    });
-
-    const apiDomainName = api.domainName || api.addDomainName('ApiDomainName', {
-      domainName,
-      certificate,
-    });
-
-    new ARecord(this, 'ApiAliasRecord', {
-      zone: hostedZone,
-      recordName: 'api',
-      target: RecordTarget.fromAlias(new ApiGatewayDomain(apiDomainName)),
+    new MealPlannerHttpApi(this, 'ApiConstruct', {
+      domain: props.domain,
+      hostedZone,
+      lambda: handler,
     });
   }
 }
diff --git a/cdk/lib/constructs/api.ts b/cdk/lib/constructs/api.ts
@@ -0,0 +1,54 @@
+import { Construct } from 'constructs';
+import { DomainName, HttpApi } from 'aws-cdk-lib/aws-apigatewayv2';
+import { HttpLambdaIntegration } from 'aws-cdk-lib/aws-apigatewayv2-integrations';
+import { IFunction } from 'aws-cdk-lib/aws-lambda';
+import { ARecord, IHostedZone, RecordTarget } from 'aws-cdk-lib/aws-route53';
+import { Certificate, CertificateValidation } from 'aws-cdk-lib/aws-certificatemanager';
+import { ApiGatewayv2DomainProperties } from 'aws-cdk-lib/aws-route53-targets';
+
+export interface MealPlannerHttpApiProps {
+  readonly domain: string;
+  readonly hostedZone: IHostedZone;
+  readonly lambda: IFunction;
+}
+
+/**
+  * Construct for building HttpApi.
+  */
+export class MealPlannerHttpApi extends Construct {
+  /**
+    * Builds an HttpApi.
+    * @param{Construct} scope the parent scope
+    * @param{string} id the logical id
+    * @param{MealPlannerHttpApiProps} props properties
+    */
+  constructor(scope: Construct, id: string, props: MealPlannerHttpApiProps) {
+    super(scope, id);
+    const lambda = new HttpLambdaIntegration('LambdaIntegration', props.lambda);
+    const domainName = ['api', props.domain].join('.');
+    const certificate = new Certificate(this, 'ApiDomainCertificate', {
+      domainName,
+      validation: CertificateValidation.fromDns(props.hostedZone),
+    });
+    const domain = new DomainName(scope, 'Domain', {
+      domainName,
+      certificate,
+    });
+    new ARecord(this, 'ApiAliasRecord', {
+      zone: props.hostedZone,
+      recordName: 'api',
+      target: RecordTarget.fromAlias(new ApiGatewayv2DomainProperties(
+          domain.regionalDomainName,
+          domain.regionalHostedZoneId,
+      )),
+    });
+    new HttpApi(scope, 'Api', {
+      defaultIntegration: lambda,
+      defaultDomainMapping: {
+        domainName: domain,
+        mappingKey: 'mealplanner',
+      },
+      disableExecuteApiEndpoint: true,
+    });
+  }
+}