feat: add discount code generator example

Author: FilipPyrek

presets/examples/discount-code-generator/templates/lib/example-stack.ts

@@ -1,8 +1,54 @@
 import * as cdk from 'aws-cdk-lib'
+import { NodejsFunction } from 'aws-cdk-lib/aws-lambda-nodejs'
+import { Action, Buttonize, ButtonizeApp, Display, Input } from 'buttonize/cdk'
 import { Construct } from 'constructs'
+import * as path from 'path'
 
 export class ExampleStack extends cdk.Stack {
 	constructor(scope: Construct, id: string, props?: cdk.StackProps) {
 		super(scope, id, props)
+
+		Buttonize.init(this, {
+			apiKey: 'btnz_mybuttonizekey1234567',
+			externalId: 'CHANGE-ME-some-random-external-id'
+		})
+
+		const discountGenerator = new NodejsFunction(this, 'DiscountGenerator', {
+			entry: path.join(__dirname, '../', 'discountGenerator.ts')
+		})
+
+		new ButtonizeApp(this, 'DemoApp', {
+			name: 'Discount code generator',
+			description:
+				'Select the discount amount and you will get the discount code on the next page.'
+		})
+			.page('InputPage', {
+				body: [
+					Display.heading('Generate discount code for customer'),
+					Input.select({
+						id: 'discount',
+						label: 'Discount value',
+						options: [
+							{ label: '30%', value: 30 },
+							{ label: '60%', value: 60 }
+						]
+					}),
+					Display.button({
+						label: 'Generate discount',
+						onClick: Action.aws.lambda.invoke(
+							discountGenerator,
+							{ Payload: { discountValue: '{{discount}}' } },
+							{ id: 'discountGenerator' }
+						),
+						onClickFinished: Action.buttonize.app.changePage('DonePage')
+					})
+				]
+			})
+			.page('DonePage', {
+				body: [
+					Display.heading('Discount generated'),
+					Display.text('Discount code: {{InputPage.discountGenerator.code}}')
+				]
+			})
 	}
 }

presets/examples/discount-code-generator/templates/src/discountGenerator.ts

@@ -0,0 +1,8 @@
+export const handler = async (event: { discountValue: number }) => {
+	console.log(`Generating discount of value ${event.discountValue}`)
+
+	return {
+		discountValue: event.discountValue,
+		code: `${Math.random()}`.split('.')[1]
+	}
+}