Community Wishlist Survey 2020/Wikisource/Make content of Special:IndexPages up-to-date and available to wikicode

Random proposal ►◄ Wikisource The survey has concluded. Here are the results!

Make content of Special:IndexPages up-to-date and available to wikicode

Problem: 1. The content of Special:IndexPages (eg. s:pl:Special:IndexPages) is not updated after changing status of some pages in an index page until the appropriate index page is purged. 2. The data from this page is not available to wikicode. Its availability would make possible creation of various statistics / sortable lists or graphic tools showing the status of index pages by users. In plwikisource, we make this data available to wikicode via bot which updates specific teplates regularily; these extra edits would be able to be avoided.
Who would benefit: All wikisources, mainly those with large number of indexes
Proposed solution: Make per-index numbers of pages with various statuses from Special:IndexPages available via mechanism like a magic function, a LUA function or something similar.
More comments:
Phabricator tickets:
Proposer: Ankry (talk) 19:12, 9 November 2019 (UTC)[reply]

Support Yes, but this should probably go together with task T207142, to make sure that metadata works the same across all languages. Amir E. Aharoni (talk) 08:19, 22 November 2019 (UTC)[reply]
Support Libcub (talk) 08:27, 22 November 2019 (UTC)[reply]
Support Bodhisattwa (talk) 14:57, 22 November 2019 (UTC)[reply]
Support Liuxinyu970226 (talk) 10:31, 24 November 2019 (UTC)[reply]
Support 游魂 16:55, 25 November 2019 (UTC)[reply]
Support Hsarrazin (talk) 14:25, 26 November 2019 (UTC)[reply]
Support Geonuch (talk) 15:06, 26 November 2019 (UTC)[reply]
Support Bonvol (talk) 20:23, 26 November 2019 (UTC)[reply]
Support Zdzislaw (talk) 20:29, 26 November 2019 (UTC)[reply]
Support Wolan (talk) 21:12, 26 November 2019 (UTC)[reply]
Support Ankry (talk) 21:32, 26 November 2019 (UTC)[reply]
Support Nawider (talk) 21:48, 26 November 2019 (UTC)[reply]
Support Atudu (talk) 03:04, 27 November 2019 (UTC)[reply]
Support Maitake (talk) 09:55, 27 November 2019 (UTC)[reply]
Support Joanna Le (talk) 20:23, 27 November 2019 (UTC)[reply]
Support Himiltruda (talk) 20:29, 27 November 2019 (UTC)[reply]
Support Draco flavus (talk) 10:04, 29 November 2019 (UTC)[reply]
Support Gurtej Chauhan (talk) 03:52, 1 December 2019 (UTC)[reply]
Support Vearthy (talk) 17:40, 2 December 2019 (UTC)[reply]
Support Novak Watchmen (talk) 17:52, 2 December 2019 (UTC)[reply]