Feature: Logging Search Bar

Description

Inspired by a short exchange on the forum: https://forum.syncthing.net/t/feature-elasticsearch-integration/21186/4?u=dalba-sudo. I'm thinking of adding a search bar in the log section of the GUI.

Use Case

"I think much simpler than this the log interface in the GUI can use a simple text search. Show me all log lines that match GX6GIWE (a device) or a file name, or an error…" - mraneri

Here's my current idea for the filtering implementation:

• add a filter function to the logging scope/class (kind of new angular, not sure what you'd call it).
  • called by ng-keyup callback on an input of type text (i.e., the "search bar").
  • only filters on keywords more than 2 characters long (if you want to look for something that is 2 characters long, use a wildcard as the third character?)
• add an input of type text in the logViewerModalView

I've linked to a video demoing the current implementation - it's bare-bones and not currently designed for scale. Before I go back to the drawing board to think about ways to make this scalable for larger logs, I want to get feedback on the feature!

Demo: https://youtu.be/64B5Fa2fiq4

This is my first contribution to open-source, any feedback is appreciated (i.e., more detail explaining the feature, etc).

Cheers,
DAlba-Sudo

Read the logging scope/class and the logViewerModalView first, then trace how an ng-keyup callback could reach the log filtering behavior. Done means the GUI has a text search bar that filters log lines by the requested keyword rules, with the scalability approach clarified before implementation.