reddit: media details (+ refactoring) #1734
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Exirel
approved these changes
Nov 5, 2019
Fetches the canonical post for videos by asking Reddit for a redirect (cheeky hack) and shows normal post details for that. Fetches the oldest post for a linked image via searching r/all and shows the usual info about that submission. Cheeky hack for getting a video's canonical URL designed by committee on Sopel's IRC channel. (See co-authors.) Co-Authored-By: deathbybandaid <sam@deathbybandaid.net> Co-Authored-By: Exirel <florian.strzelecki@gmail.com> Co-Authored-By: kwaaak <kwaaak@users.noreply.github.com>
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This is *much* better than repeating the construction call everywhere, & more efficient than making a new instance every time we're triggered.
Instead of forcing every handler that might want to trigger output of information about a post (submission) to twist its variables around so they'll work for a function designed to act on links posted in the chat, it's much better to have a separate output function that takes just the ID of a submission, and fetches/displays the details on its own. This way, no matter what another function is trying to match (Reddit-hosted images, video links, etc.), all it has to do is pass along the submission ID -- however it gets that.
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Primary changes: The
redditplugin now understands how to detect links to images & videos hosted by Reddit itself (i.redd.itandv.redd.itURLs), and how to map those back to a submission. For images, it's the oldest submission with that link as the URL; for videos, Reddit itself redirects the short URL to a 'canonical' post (should be the first, excluding all crossposts).Secondary changes: Enough with the
praw.Reddit()setup being duplicated, and enough with constructing a new instance every time the plugin wants to do something. Now, it constructs just one PRAW instance at load time, and stores it in Sopel's memory for reuse.Tertiary changes:
rpost_info()is now Just Another URL Detector™, like the newly added media link handlers. All of them now pass just the desired submission ID to a newsay_post_info()function, leaving only the route to getting the desired ID for the triggerable functions.Concerns: Potential conflicts with the changes #1722. We'll figure that out later, if necessary.