2021-02-22, 09:52 AM
You need to first index your links, aka "extract" them from your posts, which you can do from the Link Tools entry in the ACP Plugins page (it should be warning you that not all links have yet been extracted), or alternatively directly from the ACP's Tools & Maintenance => Recount & Rebuild page using the Rebuild Link Tables For Link Tools entry. Then you should run Repopulate Terminating Redirects For Link Tools, also accessible from those same pages. This is a "two for the price of one" process in that it both determines the terminating link for all extracted links (after all redirects have been resolved) as well as generates link previews and caches them (because while we're querying web servers to determine terminating links, and thus have access to the contents of the pages at those links, we might as well build the previews for them).
Once those two tasks have run, you should start to see previews in existing posts, and can, if you like, change the plugin's "On-the-fly link preview (re)generation domains" setting from "No domains" to "All domains".
I'd have to revisit the code to be sure, but I suspect that a shortcut for all of that to start viewing links immediately without going through the recount&rebuild tasks is to change that on-the-fly setting up-front - the only problem with that even if I'm correct though is that because none of the previews would be cached, your thread pages with links will be slow to load the first time as the web servers for the links are queried to build the link previews.
Just one other note: even without doing any of that, link previews should anyway be generated for any links you include in new posts (if they're not, then please let me know - that's a bug).
Phew, I hope that's not all too confusing. Any further questions, please just ask!
Once those two tasks have run, you should start to see previews in existing posts, and can, if you like, change the plugin's "On-the-fly link preview (re)generation domains" setting from "No domains" to "All domains".
I'd have to revisit the code to be sure, but I suspect that a shortcut for all of that to start viewing links immediately without going through the recount&rebuild tasks is to change that on-the-fly setting up-front - the only problem with that even if I'm correct though is that because none of the previews would be cached, your thread pages with links will be slow to load the first time as the web servers for the links are queried to build the link previews.
Just one other note: even without doing any of that, link previews should anyway be generated for any links you include in new posts (if they're not, then please let me know - that's a bug).
Phew, I hope that's not all too confusing. Any further questions, please just ask!