Propertly restart chapter on unnumbered `\part*`

Question

Following, this answer I've been able to start anew the \chapter numbering for each new \part. Unfortunately, that didn't affect the unnumbered \part*s.

Manually setting the counter (\setcounter{chapter}{0}), seems to do the job as long as hyperref is not involved. However, resetting the counter causes TOC to link the chapters in the unnumbered part to the chapters with the same local number from a previous part, which doesn't happen with automatically restarted chapters in numbered parts. E.g. "Discussion" points to "At First I Was Afraid".

\documentclass{report}
\usepackage{hyperref}
\makeatletter
\@addtoreset{chapter}{part}
\makeatother

\begin{document}
\tableofcontents
\chapter*{Foreword}
\addcontentsline{toc}{chapter}{Foreword}
\chapter*{Achnowlegements}
\addcontentsline{toc}{chapter}{Acknowlegements}
\part*{Introduction}
\addcontentsline{toc}{part}{Introduction}
\chapter{Background}
\chapter{Related Work}
\part{Where It All Begun...}
\chapter{At First I Was Afraid}
\chapter{I Was Petrified}
\part*{Discussion and Future Work}
\setcounter{chapter}{0}
\addcontentsline{toc}{part}{Discussion and Future Work}
\chapter{Discussion}
\chapter{Future Work}
\end{document}

\@add to reset{chapter}{part*} seems to have no effect at all.

What is the proper way to reset chapter numbering for both numbered and unnumbered parts?

Answer 1

You have to provide clues for hyperref in order to distinguish equally numbered chapters. This can be done by redefining \theHchapter. For the last part, provide a suitable value for \theHpart.

Of course, your internal references to chapters will be clumsy: “in chapter 1 of the introduction part” or “in chapter 3 of part II”.

Avoid resetting chapter numbers, if you are not compelled to by some devious rule.

\documentclass{report}
\usepackage{hyperref}

\counterwithin*{chapter}{part}
\renewcommand{\theHchapter}{\theHpart.\thechapter}

\begin{document}
\tableofcontents

\chapter*{Foreword}
\addcontentsline{toc}{chapter}{Foreword}

\chapter*{Achnowlegements}
\addcontentsline{toc}{chapter}{Acknowlegements}

\part*{Introduction}
\addcontentsline{toc}{part}{Introduction}

\chapter{Background}
\chapter{Related Work}

\part{Where It All Begun...}
\chapter{At First I Was Afraid}
\chapter{I Was Petrified}

\part*{Discussion and Future Work}
\setcounter{chapter}{0}\renewcommand{\theHpart}{DFW}
\addcontentsline{toc}{part}{Discussion and Future Work}

\chapter{Discussion}
\chapter{Future Work}

\end{document}