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MassMessage notifies you when posting specifically to Flow boards
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Description

I recently used Special:MassMessage to send a notification to 1,800+ talk pages. Rather than have the posts signed as "MediaWiki message delivery," I opted to have it signed under my own name by doing the usual [[User:Harej|Harej]]. I ended up getting two notifications about "MediaWiki message delivery" pinging me, even though they were just my own comments. But I only got two notifications, not over 1,800. Both of the notifications were from posts to Flow boards:

https://en.wikipedia.org/w/index.php?title=Topic:S9votlzzkv0yz49e&topic_showPostId=s9votmaguo7uw9jm&fromnotif=1#flow-post-s9votmaguo7uw9jm

https://en.wikipedia.org/w/index.php?title=Topic:S9vousecxfm7f5kk&topic_showPostId=s9vousj93cqgo8hg&fromnotif=1#flow-post-s9vousj93cqgo8hg

In the long term, the way MassMessage messages are attributed should be revisited (T71954: Add support to MassMessage to allow using the sender's username for deliveries), but in the meantime, it shouldn't ping me over my own message.

Event Timeline

Harej raised the priority of this task from to Needs Triage.
Harej updated the task description. (Show Details)
Harej added subscribers: Harej, Legoktm.

Comments from merged task:

On my way to distribute the survey about Flow, I'm receiving notifications and emails. Fortunately, I'm only targeting 1300 pages .

Idea: perhaps the delivery bot is on the user blacklist for mentions, and Flow mentions don't respect this blacklist while wikitext mentions do? If that's true, this would be a general bug not related to MassMessage.

Tested in betalabs: when a message via Special:MassMessage is posted on a Flow board, a new topic is created. If a sender has this Flow board on his watchlist - the user will get notification.

Plus here's a link to the Blacklist config details, which still need to be better understood:
https://www.mediawiki.org/wiki/Extension:Echo#Usage
(AFAIK, the only wiki which utilises this is Enwiki - https://en.wikipedia.org/wiki/MediaWiki:Echo-blacklist ) (and I don't know how to search for the existence of local versions elsewhere, per T129698: Example quarry query for searching multiple wikis for locally customized mediawiki:foo pages)

Idea: perhaps the delivery bot is on the user blacklist for mentions, and Flow mentions don't respect this blacklist while wikitext mentions do? If that's true, this would be a general bug not related to MassMessage.

I was wrong, it's just a simple hack in MassMessage: https://github.com/wikimedia/mediawiki-extensions-MassMessage/blob/master/MassMessage.hooks.php#L138 . That needs to be updated to add 'flow-mention', I'll do that now.

Change 311854 had a related patch set uploaded (by Kmuthu):
MassMessage flow mention fixed

https://gerrit.wikimedia.org/r/311854

Change 311854 merged by jenkins-bot:
MassMessage flow mention fixed

https://gerrit.wikimedia.org/r/311854

Checked in betalabs - no extra notificaitons (self-mention notifications as described in the ticket).