Convert txt file to comma delimiter file ready for importing into excel

we had several pdf of similar pattern, heading, sub title/s, text, pic and figcap, but we have now extracted to word and then into plain text file. We need either javascript or php or python script to read each line or chunk (LF -LF) and allows us to select if this is going to be H1 (Heading) or H2 (Subtitle), bodytext and Figcap. There is not much to say Heading, Subtitle and figcaps are usually cap letters with space or hypen and or (). your script will allows for us to setup a pattern that will be used to parse the rest of the plain text document, which will then be saved (downloaded) to csv (comma or tab) for easy import in excel.

Summary and suggested idea but feel free to suggest your idea, remeber the heading/subtitles and figcap are not named as you see in the examples they are unquie and different apart from the (continued) sub title

The CSV format
Headings are only grabed once per section and no duplicates, subtitles are unquie unless a contain (continued) if this is the case dont capture in CSV.

Heading, subtitle, text, figcaps.
ABCDEG, ABCDE, BLAH, FIGONE,FIGTWO
, FGHIJK, BLAH, FIGONE


read text file into memory
read line/chunk into text box show checkboxs (Chapter, Section, Subtile, Text and FigCap )
read next line/chunk into another text box show checkboxs (Chapter, Section, Subtile, Text and FigCap )
read next line/chunk into another text box show checkboxs (Chapter, Section, Subtile, Text and FigCap )
read next line/chunk into another text box show checkboxs (Chapter, Section, Subtile, Text and FigCap )
present a button to Parse and once submitted use the above pattern to filter the rest of doc into CSV file which is downloaded

REGARDS