Additional values besides title in TOC

Question

I have an article class with multiple sections. I would like to include more values in TOC, beside just the title of the section, in a table representation. For better understanding: it will be a song book, where the section does not have a "title", but "song title" and "interpret". The following ssce shows what I mean:

\documentclass{article}

\begin{document}
    \tableofcontents
    \section[FIRST VALUE - SECOND VALUE]{FIRST VALUE}{test1}
    \section[FIRST - VALUE - WITH - HYPEN - STILL SECOND VALUE]{FIRST - VALUE - WITH - HYPEN}{test2}
    \section[FIRST - VALUE - WITH - HYPEN - ALSO SECOND VALUE - WITH HYPEN]{FIRST - VALUE - WITH - HYPEN}{test3}


    \section*{Expected TOC}{
        \begin{tabular}{|l|l|l|}
        \hline
        \multicolumn{1}{|c|}{\textbf{\#}} & \multicolumn{1}{c|}{\textbf{Title}} & \multicolumn{1}{c|}{\textbf{Interpret}} \\ \hline
        1                                 & FIRST VALUE                         & SECOND VALUE                            \\ \hline
        2                                 & FIRST - VALUE - WITH - HYPEN        & STILL SECOND VALUE                      \\ \hline
        3                                 & FIRST - VALUE - WITH - HYPEN        & ALSO SECOND VALUE - WITH HYPEN          \\ \hline
        \end{tabular}
    }
\end{document}

generates:

Based on the sections I try to create the result from "Expected TOC". But unfortunatly I am not able to find any help online. I assume I am using wrong buzzwords for it. Can anyone point in the right direction to look at? Since I am using leadsheet package for the chord notation I am limited to "section" usage.

Here is an example of more real scenario:

\documentclass{article}
\usepackage{leadsheets}
\usepackage{array}

\definesongtitletemplate{title}{
    \ifsongmeasuring {
        \section*
    }{
        \section[\songproperty{title}\hfill\songproperty{interpret}]{\songproperty{title}}
    }
    \footnotesize{\GetTranslation{leadsheets/interpret}}
}

\setleadsheets{title-template = title}

\begin{document}
    \tableofcontents
    \begin{song}{title={Song 1}, interpret={Author 1}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
    \begin{song}{title={Song 2}, interpret={Auth fdsa fdsa fdsa fdsafsor 2}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
    \begin{song}{title={Song fdsa fdsa fdsa fdsa fdas 3}, interpret={Author 3}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
\end{document}

The section title contains \hfill between the values, but it makes the song title left aligned and the interpret right aligned.

Answer 1

I was able to achive the goal using etoc and substr packages. With etoc package it is possible to create tables as TOC and with substr package I am extracting the parts of the section title:

\documentclass{article}
\usepackage{leadsheets}
\usepackage{array}
\usepackage{etoc}
\usepackage{longtable}
\usepackage{bookmark}
\usepackage{substr}
\usepackage{framed}
\usepackage{varioref}


\definesongtitletemplate{title}{
    \ifsongmeasuring {
        \section*
    }{
        \section[\songproperty{title}!-!?!\songproperty{interpret}]{\songproperty{title}}
    }
    \footnotesize{\GetTranslation{leadsheets/interpret}}
}

\setleadsheets{title-template = title}


\etocglobaldefs

\etocsetstyle{section}
  {}
  {\etociffirst{\etocifnumbered{\\\hline}{\\\hline\hline}}{\\\hline}}
  {\etocnumber & \BeforeSubString{!-!?!}{\etocthename} & \BehindSubString{!-!?!}{\etocthename}}
  {}

\etocsettocstyle{
    \hypersetup{hidelinks}
    \begin{longtable}{
        |>{\bfseries}c|p{7cm}|p{7cm}|
    }
    \multicolumn{3}{c}{\Large\bfseries\strut\strut Songlist}
    \\\hline
    \ & \textbf{Title} & \textbf{Interpret}
}
{
    \\\hline
    \end{longtable}
}

\begin{document}
    \tableofcontents
    \begin{song}{title={Song 1}, interpret={Author 1}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
    \begin{song}{title={Song 2}, interpret={Auth fdsa fdsa fdsa fdsafsor 2}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
    \begin{song}{title={Song fdsa fdsa fdsa fdsa fdas 3}, interpret={Author 3}}
        \begin{verse}
            Mary had a little lamb \\
            Its fleece was white as snow, yea \\
        \end{verse}
    \end{song}
\end{document}

This ends up as expected: I am not sure if this string handling really is the "latex way" to go, but it works.