Add support for amp-embedly

Create a component that uses’s Embedly’s API to embed any provider supported by Embedly.

Note: Embedly is a paid service and publisher needs to provide their own key.

API

<amp-embedly key=<yourAPIKey> url=<embedUrl> width height layout>

Implementation details:

1- We make a call to embedly’s oembed API 2- It returns data including some html to render. 3- We add the html and watch for resize events and resize our components accordingly.

NOTE: we can NOT trust the html return by embedly and just inject it. Therefor this component as a whole needs to live in a 3P iframe similar to amp-gist or amp-twitter

/to @juanlizarazo /cc @jpettitt @ericlindley-g

[juanlizarazo]

@aghassemi @alanorozco New PR #14819 is up and ready for review 😁

[juanlizarazo]

Little update here!

This is the current status, I am aiming to finish the remaining tasks in the next few days.

I closed PR #13843 because the new amp-embedly-card component’s implementation is quite different. I will create a new one once this is ready.

• Create and register extension.
• Do not trust html, use 3p iframe.
• Parse url data attributes.
• Load external script in 3p iframe
• Render card
• Listen for resize events
• amp-embedly-key component, when key provided, branding is removed.
• Allow customization options
• Update validator definition
• Documentation.
• Unit tests.

@aghassemi @alanorozco