Social: Disable sharing UI for invalid connections

[manzoorwanijk]

Proposed changes:

• Disable reshare button and hide post publish share status when all the enabled connections are invalid

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Add a Facebook and an Instagram connection
• Edit an existing post
• Open Jetpack/Social sidebar and enable SIG
• Enable only the Instagram connection
• Now disable SIG to make the Instagram connection invalid due to no media
• Confirm that the "Share post" button is disabled
• Now enable any other connection
• Confirm that the button is enabled again
• Go to https://www.facebook.com/settings/?tab=business_tools and remove Jetpack to make the connection broken
• Create a new post and disable all other valid connections.
• Publish the post
• On the post publish panel, confirm that you don't see "Sharing your post..."
• Now create another post with other connections enabled
• Confirm that the share status show up fine.
• Edit an existing post
• Open Jetpack/Social sidebar
• Quickly enable broken Facebook and Instagram connections before the test results finish
• Wait for connection test results to finish
• Confirm that "Share post" button is now disabled because only the invalid connections are enabled.
• Now enable any other connection
• Confirm that the "Share post" button is enabled again

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the update/social/disable-sharing-for-invalid-connections branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack update/social/disable-sharing-for-invalid-connections
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

• ✅ Include a description of your PR changes.
  
• ✅ Add a "[Status]" label (In Progress, Needs Team Review, ...).
  
• ✅ Add testing instructions.
  
• ✅ Specify whether this PR includes any changes to data or privacy.
  
• ✅ Add changelog entries to affected projects
  

This comment will be updated as you work on your PR and make changes. If you think that some of those checks are not needed for your PR, please explain why you think so. Thanks for cooperation 🤖

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[gmjuhasz]

Looks good, and works well!

Just had a question to confirm one thing