\ProvidesFile{iso-authoryear.bbx}
  [2022/03/20 v0.4.1 ISO 690 biblatex bibliography style]

\RequireBibliographyStyle{iso}
\ExecuteBibliographyOptions{%
  sorting=nyt,
}

% The separator between 'titles' and the numeration section.
% Overrides the command in 'iso.bbx'.
\renewcommand{\numerationpunct}{\newunitpunct}

% Delimiter between creator name and year in bibliography
\DeclareDelimFormat[bib,biblist]{nameyeardelim}{\addcomma\space}
% Delimiter between substitution of creator name (if any)
% and year in bibliography
\DeclareDelimFormat[bib,biblist]{nonameyeardelim}{\addcomma\space}

% a)
% The field extradate turns from integer type to a letter
% after year to distinguish more works of the author
% from the same year, e.g. 1994a, 1994b.
% We use 'labeldate' as it is also used in standard styles.
% b)
% Moreover we print additional date information (dateaddon).
\newbibmacro*{date+extradate}{%
  \printlabeldateextra
  \setunit{\dateaddonpunct}%
  \iffieldequalstr{labeldatesource}{dateaddon}
    {}% Do not print dateaddon twice
    {\printfield{dateaddon}}%
}

% Check if 'date' field holds only year or a more specific date.
% Inspired by \ifdatehasyearonlyprecision from 'biblatex.sty',
% but the test date==year is left out, because we use date=year
% in package options so it turned always true.
\newcommand{\ifdatehasyearonly}{%
  \ifboolexpr{not test {\iffieldundef{year}}
              and (test {\iffieldundef{month}}
                   and test {\iffieldundef{season}})}
}

% If there is no more specific date available, we shouldn't repeat
% the year in publication info section.
% Overrides macro 'fulldate' in 'iso.bbx'.
\renewbibmacro*{fulldate}{%
  \ifdatehasyearonly%
    {}% Print nothing (only year is available)
    {\mkdaterangeiso{}}%
}

% Remove second appearance of year in a reference
\renewbibmacro*{date}{}%

% Overwrite names:primary to print year right after:
% 0) holder (only for patents)
% 1) author
% 2) editor
% 3) label/title
% Need to handle not to print editor twice (primary
% and subsidiary names): editor macro includes \clearname{editor}
\renewbibmacro*{names:primary}{%
  % If we have a patent with holder field, we will use that.
  \ifboolexpr{test \ifuseholder and test {\ifentrytype{patent}}
                                and not test {\ifnameundef{holder}}}
    {\usebibmacro{byholder}%
    \setunit{\addspace}%
    \printfield{nameaddon}%
    \setunit{\printdelim{nameyeardelim}}}%
    {% Otherwise, first check if we have author(s) available
    \ifboolexpr{test \ifuseauthor and not test {\ifnameundef{author}}}
      {\usebibmacro{author}%
      \setunit{\addspace}%
      \printfield{nameaddon}%
      \setunit{\printdelim{nameyeardelim}}}%
      {% If no author(s) is available, check for editor(s)
      \ifboolexpr{test \ifuseeditor and not test {\ifnameundef{editor}}}
        {\usebibmacro{editor}%
        \setunit{\printdelim{nameyeardelim}}}%
        {% If no editor(s) is available, use label/title
        \usebibmacro{labeltitle}%
        \setunit{\printdelim{nonameyeardelim}}}}}%
  % And finally print date
  \usebibmacro{date+extradate}%
}

% Print label or title in place of names if they are not available
\newbibmacro*{labeltitle}{%
  \iffieldundef{label}
    {\iffieldundef{shorttitle}
       {\usebibmacro{titles}{}{emph}%
        \clearfield{title}%
        \clearfield{subtitle}%
        \clearfield{titleaddon}}
       {\printfield[title]{shorttitle}}}
    {\printfield{label}}}

\renewbibmacro*{urldate-space}{%
  % if there is no publisher specified in the bib file, set unit to dot,
  % so there is a separation between previous block
  % this version doesn't check date, as it isn't printed in the publisher block
  \ifboolexpr{%
    test {\iflistundef{publisher}}%
    and test {\iflistundef{location}}%
    and test {\iffieldundef{version}}%
  }{\setunit{\adddot\addspace}}%
  {\setunit{\addspace}}%
}

\newbool{bbx@inset}
\DeclareBibliographyDriver{set}{%
  \booltrue{bbx@inset}%
  \entryset{}{}%
  \newunit\newblock
  \usebibmacro{setpageref}%
  \finentry}


\endinput