Modify All Logs Before Giving To Filter

[rknd]

Hello everyone,
Imagine that I have a codec plugin for input and my logs like this :
00:23 Lorem Ipsum
13:35 Lorem Ipsum
14:00 DATE-LINE 01/01/2020
15:43 Lorem Ipsum
20:20 Lorem Ipsum
00:15 Lorem Ipsum
13:10 DATE-LINE 02/01/2020
14:50 Lorem Ipsum
....

I want to make ruby a codec plugin that calculate dates via DATE-LINE before sending to filter plugin. I mean the output like;
00:23 (01/01/2020) Lorem Ipsum
13:35 (01/01/2020) Lorem Ipsum
14:00 DATE-LINE 01/01/2020
15:43 (01/01/2020) Lorem Ipsum
20:20 (01/01/2020) Lorem Ipsum
00:15 (02/01/2020) Lorem Ipsum
13:10 DATE-LINE 02/01/2020
14:50 (02/01/2020) Lorem Ipsum
How can i do this with a ruby codec plugin ? Can someone give an example code ?
Thanks for helping

[Badger]

There are a couple of ideas here.

You will need event order preserved so you must set pipeline.workers 1 and, if needed, pipeline.ordered (in 7.10 the default will be OK).

No way do the first two lines get the date from the third line added. I do not think it is possible.