Add a 'Ping' feature to the Webhook Subscriptions

[HollyJoyPhillips]

Summary: We now have the ability for developers to test their webhook subscription using a ‘Ping’ method.

Location: https://dev.marketplace.reapit.cloud/developer/webhooks

Relates to ticket: #1162

Endpoint: https://dev.platform.reapit.cloud/webhooks/swagger/index.html
/subscriptions/{id}/ping

Task: To link the ‘Ping’ on subscriptions to the /subscriptions/{id}/ping endpoint for developers to test their webhook

• ‘Ping’ should be hyperlinked (underlined, bold and in Reapit blue #0061a8)

• When clicked should populate a modal:

• Title: Test Webhook Subscription

• Message: To test your Webhook subscription, please select a ‘Subscription Topic’ below:

• Subscription Topic field should display the TOPICID(s) associated to that webhook.

• Should only be able to select 1 topic

• Buttons: Cancel (closes modal) & ‘Test’ (should POST to the endpoint with the subscription ‘ID’ and ‘TOPICID’)
  See mockup:
  

• If success, should show success modal with message ‘Connection successful’

• Message: ‘We have successfully established a connection to the URL provided’

• Button to close

• Button to close
  See mockup:
  

• If it fails, should show modal with message ‘Unfortunately the connection was unsuccessful, please check to ensure you have entered a valid URL’
  See mockup:
  

[HollyJoyPhillips]

Hi @ant066 thanks for merging this. Just one small change please:

‘Ping’ should be hyperlinked (underlined, bold and in Reapit blue #0061a8)