Maniphest T205459

Decide how SlotRoleHandlers can provide placeholders for missing slots
Open, MediumPublic
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Authored By

	daniel
	Sep 25 2018, 4:47 PM

Description

SlotRoleHandlers should provide a way to show a placeholder when a certain slot is desired on a given page, but missing. This could be done in the following ways

provide HTML (or a ParserOutput object) to represent the missing slot
provide a dummy Content object to be show (and maybe even saved with the next revision)
provide a message key that identifies a message to be shown when the slot is missing but desired.

The placeholder would be shown for all roles returned by getDesiredRoles() for a given title. However, the baseline implementation of getDesiredRoles() just returns [ 'main' ]. SlotRoleHandler could get an isDesiredOn( $title ) method, but this would require all slot handlers to be instantiated before getDesiredRoles() can return a value.

Using some kind of PageTypeHandler to define which roles are desired on a given page seems to make more sense.

Details

	Subject	Repo	Branch	Lines +/-
	MCR EXP Introduce placeholder output and PageTypeHandler.	mediawiki/core	master	+317 -45

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Open		None	T205459 Decide how SlotRoleHandlers can provide placeholders for missing slots
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Event Timeline

daniel triaged this task as Medium priority.Sep 25 2018, 4:47 PM

daniel created this task.

Restricted Application removed a project: Patch-For-Review. · View Herald TranscriptSep 25 2018, 4:47 PM

SDoC use case:

When SDoC launches on Commons we will want to be able to add a MediaInfo item and its data to all File pages.

If there is *already* a MediaInfo item for a File page then it gets displayed, and can be edited. If no slot exists, however, then MediaWiki doesn't know that one is expected, and there is no way for the backend to display an empty slot to the user so they know that data is missing

CCicalese_WMF moved this task from Inbox to CPT MCR Backlog on the Core-Platform-Team-Old board.Sep 25 2018, 10:08 PM

Change 463076 had a related patch set uploaded (by Daniel Kinzler; owner: Daniel Kinzler):
[mediawiki/core@master] MCR EXP Introduce placeholder output and PageTypeHandler.

https://gerrit.wikimedia.org/r/463076

gerritbot added a project: Patch-For-Review.Sep 26 2018, 2:17 PM

Jdforrester-WMF edited projects, added Structured Data Engineering; removed SDC General.Sep 27 2018, 10:12 PM

Jdforrester-WMF moved this task from To Do to Monitoring on the Structured Data Engineering board.Sep 27 2018, 10:12 PM

CCicalese_WMF added a project: Platform Team Legacy (Next).Oct 1 2018, 11:23 PM

CCicalese_WMF edited projects, added Core Platform Team Goals (MCR: Uncategorized); removed Core-Platform-Team-Old.Oct 2 2018, 12:08 AM

CCicalese_WMF edited projects, added Platform Engineering (MCR: Deployment); removed Core Platform Team Goals (MCR: Uncategorized).Oct 2 2018, 2:46 AM

CCicalese_WMF moved this task from MCR: Deployment to MCR: New Features on the Platform Engineering board.Oct 2 2018, 3:14 AM

CCicalese_WMF edited projects, added Platform Engineering (MCR: New Features); removed Platform Engineering (MCR: Deployment).

CCicalese_WMF moved this task from Inbox to Next on the Multi-Content-Revisions board.Oct 2 2018, 2:06 PM

CCicalese_WMF edited projects, added Platform Team Legacy (Designing), Platform Engineering (MCR); removed Platform Engineering (MCR: New Features), Platform Team Legacy (Next).Oct 3 2018, 2:50 PM

CCicalese_WMF moved this task from Next to In Progress on the Multi-Content-Revisions board.