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Block Library: Add the Comments Pagination Previous block #36912

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merged 8 commits into from
Dec 21, 2021

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cbravobernal
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@cbravobernal cbravobernal commented Nov 26, 2021

Description

We are adding the Previous Comments block for FSE with this PR. It will close #35009 once is done.

We still need to work on how the entire pagination system is displayed with comments accordingly. But will be done in follow-up PRs.

This is just adding styles to the markup and using get_previous_comments_link() function in PHP for the server rendering.

How has this been tested?

  • Create a Comment Query Loop
  • Add pagination
  • Check arrows are working, including RTL version.
  • Check that Comment Template is loading the correct comment/s.

Screenshots

Editor:
Screenshot 2021-12-20 at 16 42 34

Frontend:
Screenshot 2021-12-20 at 16 42 21

Types of changes

  • New feature. New core block.

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

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github-actions bot commented Nov 26, 2021

Size Change: +98 B (0%)

Total Size: 1.13 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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@gziolo gziolo added [Block] Comment Template Affects the Comment Template Block New Block Suggestion for a new block labels Nov 29, 2021
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It looks good so far. Let's see how it integrates with the parent block after necessary changes get applied.

@gziolo gziolo added the [Status] In Progress Tracking issues with work in progress label Nov 29, 2021
@cbravobernal cbravobernal force-pushed the add/comments-pagination-previous branch from a54a6ae to bf2215a Compare December 2, 2021 11:31
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gziolo commented Dec 16, 2021

@c4rl0sbr4v0, do you plan to refresh this PR or do you want until the Comments Pagination Next block #36562 lands?

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I prefer to land first the "Next Block". As after that we will have to update the parent one with all the blocks.

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Great work. It's very similar to the Comments Next Page block. I left some thoughts that aren't blockers. You will have to run npm run docs:build to trigger documentation update for the list of core blocks page.

A more general note is that the current implementation for all Comments Query Loop blocks is tied to the single post template and highly depends on the presence of the post object. It's okay for now, but we should also look into making it flexible enough to support other use cases where users want to see any list of comments – basically whatever WP_Comment_Query can process.

@gziolo gziolo removed the [Status] In Progress Tracking issues with work in progress label Dec 21, 2021
@cbravobernal cbravobernal force-pushed the add/comments-pagination-previous branch from a3e9197 to 950a9b8 Compare December 21, 2021 10:45
@cbravobernal cbravobernal requested a review from mkaz as a code owner December 21, 2021 11:24
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gziolo commented Dec 21, 2021

The failing e2e tests for the Navigation block seem to be unrelated to this PR. Let's re-run the tests again.

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gziolo commented Dec 21, 2021

Testing this PR is very complex so I recorded a screencast with voice where I explain all my findings:

Screen.Recording.2021-12-21.at.14.54.26.mov

Some highlights:

  • when selecting a custom setting for items per page, the Next Comments links shows up even when we are on the last page
  • there is a different link used in the Previous Comments and in the number 1 from the Pagination Numbers block
  • in the old version there are different labels used Older Comments vs Previous Comments

Everythin worked as intended when using global discussion settings.

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Thanks for reviewing the entire comments template, is being quite a tricky component at the end!

This PR is just for the Previous Block; maybe we could land it and attend those highlights in different issues. I will be glad to create and work on them.

  • when selecting a custom setting for items per page, the Next Comments link shows up even when we are on the last page

It seems that a similar issue has been merged for the Query Loop. We can create a PR to fix it.

  • there is a different link used in the Previous Comments and in the number 1 from the Pagination Numbers block

Previous Comments is using a different function to retreive the link.
paginate_links() function is used on paginate_comments_links()on Pagination Numbers Block
get_comments_pagenum_link() function is used on get_previous_comments_link() on Pagination Previous Block and also on get_next_comments_link().

This could be a starting point to fix this issue.

  • in the old version there are different labels used Older Comments vs Previous Comments

I think that is due to these functions:
https://github.com/WordPress/wordpress-develop/blob/trunk/src/wp-includes/link-template.php#L3172-L3181

From my point of view, as a user, it is easier to navigate between newer or older comments than to Next or Previous. But also, this is tied to a sort by date option. If the user wants to sort by most popular or other different than a date, that approach won't work. However, it could be solved just by changing the label, which is editable.

I think it would be better first to be able to choose sort order of comments with #37297. That way, we can update the labels to Older or Previous depending on the selection.

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gziolo commented Dec 21, 2021

@c4rl0sbr4v0, it all sounds like a great plan. Let’s follow all the steps and land this PR and #37297 before we work on the listed items.

@cbravobernal cbravobernal force-pushed the add/comments-pagination-previous branch from 483e9ae to 38b9ecb Compare December 21, 2021 15:50
@cbravobernal cbravobernal merged commit 0ba3b09 into trunk Dec 21, 2021
@cbravobernal cbravobernal deleted the add/comments-pagination-previous branch December 21, 2021 16:29
@github-actions github-actions bot added this to the Gutenberg 12.3 milestone Dec 21, 2021
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