Is there a ready-made log viewer with the ability to set custom parsing syntax?

Question

Journaling

Greetings!
I would like to find a convenient log viewer, with the ability to set your own syntax for parsing (errors, debug output, notifications, events, etc.)
With statistics, graphs, email notifications, etc., etc. well, or the ability to write your own plugins.
Software features with web interface.
I do not want to reinvent the wheel, maybe already?