Tidy export page, make export lambda alarm on failure

packages/cdk/lib/transcription-service.ts

@@ -77,6 +77,11 @@ import { Topic } from 'aws-cdk-lib/aws-sns';
 import { Queue } from 'aws-cdk-lib/aws-sqs';
 import { JsonPath } from 'aws-cdk-lib/aws-stepfunctions';
 
+const topicArnToName = (topicArn: string) => {
+	const split = topicArn.split(':');
+	return split[split.length - 1] ?? '';
+};
+
 export class TranscriptionService extends GuStack {
 	constructor(scope: App, id: string, props: GuStackProps) {
 		super(scope, id, props);
@@ -531,6 +536,8 @@ export class TranscriptionService extends GuStack {
 			},
 		).valueAsString;
 
+		const alarmTopicName = topicArnToName(alarmTopicArn);
+
 		const mediaDownloadTask = new GuEcsTask(this, 'media-download-task', {
 			app: mediaDownloadApp,
 			vpc,
@@ -693,6 +700,14 @@ export class TranscriptionService extends GuStack {
 				handler: 'index.outputHandler',
 				runtime: Runtime.NODEJS_20_X,
 				app: `${APP_NAME}-output-handler`,
+				errorPercentageMonitoring:
+					this.stage === 'PROD'
+						? {
+								toleratedErrorPercentage: 0,
+								noMonitoring: false,
+								snsTopicName: alarmTopicName,
+							}
+						: undefined,
 			},
 		);
 
@@ -737,6 +752,14 @@ export class TranscriptionService extends GuStack {
 				ephemeralStorageSize: Size.mebibytes(10240),
 				memorySize: 2048,
 				timeout: Duration.seconds(900),
+				errorPercentageMonitoring:
+					this.stage === 'PROD'
+						? {
+								toleratedErrorPercentage: 0,
+								noMonitoring: false,
+								snsTopicName: alarmTopicName,
+							}
+						: undefined,
 			},
 		);
 

packages/client/src/components/ExportForm.tsx

@@ -68,11 +68,11 @@ const statusToMessage = (status: RequestStatus): string => {
 		case RequestStatus.CreatingFolder:
 			return "Export in progress... If nothing happens, make sure that your browser isn't blocking pop-ups.";
 		case RequestStatus.TranscriptExportInProgress:
-			return 'Transcript export in progress. Links to your files will soon appear below.';
+			return 'Export in progress. Links to your files will soon appear below.';
 		case RequestStatus.InProgress:
-			return `Export in progress. See below for links to your transcript files. Source media will take a little 
-					longer - you can stay on this page or click the button to open the google drive folder and wait 
-					for it to appear there.`;
+			return `Export in progress. See below for links to your transcript files. Source media may take several 
+			 minutes - you can stay on this page or click the button to open the google drive folder and wait 
+			 for it to appear there.`;
 		case RequestStatus.Ready:
 		default:
 			return '';