[wp-trac] [WordPress Trac] #37799: Add progress indicator to "Upgrade Network" page

[WordPress Trac]

#37799: Add progress indicator to "Upgrade Network" page
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 Reporter:  johnjamesjacoby                      |       Owner:  pcarvalho
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  Future
Component:  Networks and Sites                   |  Release
 Severity:  normal                               |     Version:
 Keywords:  good-first-bug has-screenshots has-  |  Resolution:
  patch ui-feedback                              |     Focuses:  multisite
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Changes (by earnjam):

 * keywords:  good-first-bug has-ui-feedback has-screenshots has-patch ui-
     feedback => good-first-bug has-screenshots has-patch ui-feedback


Comment:

 I like @spacedmonkey suggestions, but I think that will obviously require
 some additional coordination, especially if we are to create and use a new
 REST API endpoint.

 I think [attachment:37799.4.diff] can serve as a good interim step while
 we work toward a total revamp of this process. As far as that particular
 patch, I don't think it would have any noticeable effect on performance.
 While it adds a call to `get_blog_count()` on each load, that's a cached
 network option and should only updated 2x a day or whenever new sites are
 added/removed.

 I'd prefer the current message "All done!" instead of "No more sites
 found." upon completion though.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37799#comment:22>
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