Implement more gambits

[tobyzerner]

Gambits are little pieces of search criteria that can be specified in the search string. Just like GitHub's search syntax.

Right now we've only implemented a few: is:unread and author:username in core, and tag:foo,bar, is:followed, is:ignored, is:sticky, and is:locked in their respective extensions.

We probably want to implement the following gambits:

• Multiple author search, separated by commas (author:username1,username2)
• created:date where date is the same syntax as on GitHub
• updated:date
• contributor:username1,username2
• replies:number where number is the same syntax as on GitHub
• ip:123.123.123.123

Pending flarum/framework#257, we will also want to have an in:title gambit which scopes fulltext search to only look in discussion titles.

We should also implement more gambits when searching users (i.e. /api/users?q=whatever), such as for filtering by group.

This is a precursor to an extensible advanced search interface which will come later.

[Albert221]

See flarum/framework#703.

[BartVB]

Can I put in a request for searching by IP address? We use that to track down spammers and their posts. Obviously this should be behind some kind of permission.

[franzliedke]

@BartVB Good idea. If @tobscure agrees, we can add that to the list at the top of this issue.

[luceos]

Contributor or participant is related to the author of a post, contrary to the current Author Gambit for Discussions.

[askvortsov1]

This post was made a while ago, and hasn't been updated recently. The following have already been updated:

• Multiple author search
• Multiple contributor search (PR)
• Time Created
• Time Last Updated (PR)
• Improvements to fulltext title searching

There are a few more things to consider:

• Should the created and uploaded gambits be updated offer better support for "before" and "after"? eg: created:before:2020-01-04
• Do we even want a replies # gambit? This feels like something that would definitely need to be greater than or less than, I can't imagine searching for posts with exactly n replies
• Do we want to consider permissions in gambits? While it would be nice to search by IP address, that would mean hardwiring in a big chunk of new logic which, frankly, feels like overkill.

[luceos]

Looking at your discussion on internals (next time please stick to the issue, so that we are not scattering our path of thought everywhere), I think (in my opinion) we need to decide on one date; which to me would make most sense for created_at. I don't think anyone would ever have any need for the other fields and if they do they can either:

• use the database directly
• create their own gambit

Having said that, I like what discord did and the argument @datitisev made; keep it stupid simple. Increasing nesting of the namespace (semicolon) will not do our app any good. For this reason I think the PR flarum/framework#2027 should be closed.

PS. as a general remark, if you foresee these kind of decisions it's often better to first discuss the options and then do a PR. Otherwise you spent valuable time on something that might be discarded while risking feeling burned/overruled by a core team decision. Having said so, your efforts are immensely valued, keep it up!