Add top bar for former CC Search users

[zackkrida]

Anyone visiting wordpress.org/openverse from a domain containing creativecommons.org should see a special banner at the top of the site. This is intended so that CC Search users aren't confused when they are redirected to Openverse, and so we can control the narrative about what a positive change for the project this is.

Mockup

Figma link: https://www.figma.com/file/BlUTIXRHLOq5mRITpDpi3E/Transitional-styles?node-id=418%3A2025

Please only show if the referrer is from a creativecommons.org domain. And make sure to localize the text. Link should go to https://wordpress.org/news/2021/05/welcome-to-openverse/

[dhruvkb]

@panchovm I have a few questions about this bar.

• Should this bar be dismissable, for example, with an X icon?
• Will this be shown again to the same user if they follow the redirect again?

[dhruvkb]

@zackkrida what approach will CC be employing to perform the redirect? It's very likely that the referrer will be empty unless the user reaches the page by clicking a link. All approaches like 301/302 redirects, JavaScript window.location are leading to the referrer being blank.

[zackkrida]

Typically a 301 preserves the referer, but I suppose we could also have them add a query parameter or other more reliable method of showing the banner!

[dhruvkb]

Even if 301 would preserve the referrer, wouldn't that contain the domain that sent them to CC Search then, and not the CC Search domain itself? Query param would be awesome 👍 if they can do that. Our theme anyways has the path forwarding set up so it'll reach the Vue iframe automatically.

[zackkrida]

OH duh. This whole time I've been conflating the original referrer to search.creativecommons.org with search.creativecommons.org itself. We will definitely have them add a query param, thank you!

[fcoveram]

Arriving late here, but coming to say that we talked about having the message for a period of time (TBD).