Add support for IndieWeb syndication links + backfeed

[jeffpaul]

Is your enhancement related to a problem? Please describe.
In chatting with folks in the IndieWeb community, it was recommended that we consider adding Syndication Links and Backfeed support to Autoshare for Twitter. Adding support for Syndication Links seems more straightforward than Backfeed, mainly due to the fact that Twitter doesn't currently offer support for fetching a tweet's replies (or favorites). I've opened a ticket on the Twitter developers site to get more insight into that sort of API and whether it's on the roadmap, will update here as I get any updates.

Describe the solution you'd like

• may be able to link into Syndication Links for the links
• may be able to borrow from Ryan Barrett's code, particularly the fetch_replies and favorites_html_to_links methods

Designs

n/a

Describe alternatives you've considered

none

Additional context

Good support from the IndieWeb community is available in their Slack channel dedicated to WordPress.

[dshanske]

I am the primary developer for Syndication Links. It is a dead simple plugin that finds syndicated copies of content syndicated by other plugins and displays links to them...such as Twitter in this case.

[dshanske]

Happy to help in any way

[jeffpaul]

@dshanske any recommendations in terms of how you'd ideally see Autoshare for Twitter integrate with Syndication Links?

[dshanske]

@dshanske any recommendations in terms of how you'd ideally see Autoshare for Twitter integrate with Syndication Links?

Well, we store the Syndication urls in a meta key...you can just update it. Or you could, if it exists, call our add syndication link function to save it there.