Deploying web app with Jenkins

Jenkinsfile

@@ -39,23 +39,49 @@ pipeline {
                 }
             }
         }
-        stage('Create deployment package') {
+        stage('Create UI package') {
             steps {
                 dir('holiday-calendar-web') {
                     bat 'xcopy /Y "deployment\\Procfile" dist'
-                    zip zipFile: 'dist/holiday-calendar-web.zip', dir: 'dist'
+                    zip zipFile: 'dist/holiday-calendar-web.zip', dir: 'dist', overwrite: true
+                }
+            }
+        }
+        stage('Upload UI package') {
+            steps {
+                dir('holiday-calendar-web') {
+                    withAWS(credentials: 'AWS Credentials') {
+                        bat 'aws s3 cp dist/holiday-calendar-web.zip s3://elasticbeanstalk-holiday-calendar-ap-southeast-1'
+                    }
+                }
+            }
+        }
+        stage('Create UI Elastic Beanstalk environment') {
+            steps {
+                dir('holiday-calendar-web/deployment') {
+                    withAWS(credentials: 'AWS Credentials', region: 'ap-southeast-1') {
+                        script {
+                            webStackName = 'holiday-calendar-web'
+                            if (isStackExisting(webStackName)) {
+                                echo "Elastic Beanstalk stack ${webStackName} already exists. Deploying new source code."
+                                deployNewCode()
+                            } else {
+                                echo 'Create new Elastic Beanstalk stack.'
+                                createWebStack(webStackName)
+                            }
+                        }
+                    }
                 }
             }
         }
     }
 }
 
 def getApiUrl() {
-    withAWS(credentials: 'AWS Credentials') {
+    withAWS(credentials: 'AWS Credentials', region: 'ap-southeast-1') {
         script = '''
                  @echo off
                  aws cloudformation describe-stacks ^
-                 --region ap-southeast-1 ^
                  --stack-name holiday-calendar-lambda ^
                  --query "Stacks[0].Outputs[?OutputKey==\'HolidayCalendarApi\'].OutputValue" ^
                  --output text
@@ -73,3 +99,41 @@ def replaceApiUrl(apiUrl) {
     echo "Override environment.ts with: ${newContent}"
     writeFile(file: environmentFile, text: newContent)
 }
+
+def isStackExisting(stackName) {
+    script = """
+             @echo off
+             aws cloudformation list-stacks ^
+             --query \"StackSummaries[?StackName == '${stackName}' && StackStatus == 'CREATE_COMPLETE']\"
+             """
+    output = bat(script: script, returnStdout: true)
+    return output.contains(stackName)
+}
+
+def createWebStack(webStackName) {
+    bat """
+        aws cloudformation create-stack ^
+        --stack-name ${webStackName} ^
+        --template-body file://template.yaml ^
+        --capabilities CAPABILITY_NAMED_IAM
+        """
+}
+
+def deployNewCode() {
+    version = createNewVersion()
+    bat """
+        aws elasticbeanstalk create-application-version ^
+        --application-name holiday-calendar-web ^
+        --version-label ${version} ^
+        --source-bundle S3Bucket=elasticbeanstalk-holiday-calendar-ap-southeast-1,S3Key=holiday-calendar-web.zip
+        """
+    bat """
+        aws elasticbeanstalk update-environment ^
+        --environment-name holiday-calendar-web ^
+        --version-label ${version}
+        """
+}
+
+def createNewVersion() {
+    new Date().format('yyyyMMdd-HHmmss-SSS')
+}