Endnotes section divided into subsections

Question

My document is divided into preface section and numbered sections (labelled as '# [Name of Chapter]' and so on). In all of these sections there are notes, which are placed at the end of the document (section 'NOTES'). I need to divide the 'NOTES' section into subsections each of them having list of notes from the respective section. I search this site for tips and found one solution that I put into the preamble of my latex file:

\documentclass{article}
\usepackage{graphicx}

\usepackage{setspace}\doublespacing

\usepackage{endnotes}
\usepackage{natbib}
\bibliographystyle{apalike}
\usepackage{lipsum}
%--- Endnotes rules
\counterwithin{endnote}{section}     % Reset endnote numbering     every new part
\makeatletter
\renewcommand\enoteheading{%
\setcounter{secnumdepth}{-2}
\section{\notesname}
\addtocontents{toc}{\protect\addvspace{10pt}} % adjust to suit
\addcontentsline{toc}{section}{\notesname}
\mbox{}\par\vskip-\baselineskip
\let@afterindentfalse@afterindenttrue
}
\makeatother
\usepackage{xparse}
\let\latexsection\section
\RenewDocumentCommand{\section}{som}{%
  \IfBooleanTF{#1}
    {\latexsection*{#3}}
    {\IfNoValueTF{#2}
   {\latexsection{#3}}
   {\latexsection[#2]{#3}}%
 \addtoendnotes{\unexpanded{\subsection{#3}}}
}
}
%--- ...end of the Endnotes rules
\begin{document}
\let\footnote=\endnote
\pagenumbering{roman}
{\let\bfseries\mdseries \tableofcontents} \newpage
\section*{Preface}
\addcontentsline{toc}{section}{\uppercase{Preface}}
\lipsum[1-3]\footnote{foo bar baz in Preface}
\newpage
\pagenumbering{arabic}
\section{Intro & Plan}
\lipsum[1-2]\footnote{foo bar baz in Ch1}
\newpage
\section{Literature Review}
\lipsum[1-2]\footnote{foo bar baz in Ch2}
\newpage
\theendnotes
\addcontentsline{toc}{section}{\uppercase{Notes}}
\end{document}

The output pdf file produces this look of the 'Notes' section (see image below), which misses the title of 'PREFACE' section. In addition to that I need the titles of the numbered sections to contain 'CHAPTER # [Name of Chapter]'. Lastly, Table of Contents of the document must suppress the subsection ToC lines just after the ToC line of 'NOTES'.

Answer 1

It seems you are trying to adapt one of @egreg's answers about this for the article class (https://tex.stackexchange.com/a/109566/105447 appears to be the closest to your use case). In the future, please report the sources of the code you are using, not only because credit is due, but also because it is much easier for anyone trying to help you if they know what the working version is supposed to be.

Anyway, here is a version of it for article:

\documentclass{article}
\usepackage{setspace}
\doublespacing
\usepackage{endnotes}
\usepackage{lipsum}
%--- Endnotes
% Adapted from https://tex.stackexchange.com/a/109566/105447
% Reset endnote numbering every section
\counterwithin*{endnote}{section}
\makeatletter
\NewCommandCopy\latexsection\section
\renewcommand\enoteheading{%
  \setcounter{secnumdepth}{-2}
  \latexsection*{\notesname}
  \addtocontents{toc}{\protect\addvspace{10pt}} % adjust to suit
  \addcontentsline{toc}{section}{\MakeUppercase{\notesname}}
  % I don't think this is needed in this case, and you get excessive space
  % with it imho.
  % \mbox{}\par\vskip-\baselineskip
  \let@afterindentfalse@afterindenttrue
}
\makeatother
% It's no longer need to load xparse for \RenewDocumentCommand
% \usepackage{xparse}
\RenewDocumentCommand{\section}{som}{%
  \IfBooleanTF{#1}
  {\latexsection{#3}%
    \setcounter{endnote}{0}%
    \addtoendnotes{%
      \noexpand\enotedivision{\noexpand\subsubsection}
      {\unexpanded{#3}}}%
  }
  {\IfNoValueTF{#2}
    {\latexsection{#3}}
    {\latexsection[#2]{#3}}%
    \addtoendnotes{%
     \noexpand\enotedivision{\noexpand\subsubsection*}
     {\thesection. \unexpanded{#3}}}%
  }%
}
\makeatletter
\def\enotedivision#1#2{@ifnextchar\enotedivision{}{#1{#2}}}
\makeatletter
%--- ...end of Endnotes
\let\footnote=\endnote
\begin{document}
\pagenumbering{roman}
% That's not a very LaTeX-y way to format your ToC, but you can have it your
% way...
{\let\bfseries\mdseries \tableofcontents}
\newpage
\section*{Preface}
\addcontentsline{toc}{section}{\MakeUppercase{Preface}}
\lipsum[1-3]\footnote{foo bar baz in Preface}
\newpage
\pagenumbering{arabic}
\section{Intro & Plan}
\lipsum[1-2]\footnote{foo bar baz in Ch1}
\newpage
\section{Literature Review}
\lipsum[1-2]\footnote{foo bar baz in Ch2}
\addtoendnotes{\unexpanded{\enotedivision{}{}}}
\newpage
\theendnotes
\end{document}