\ProvidesFile{markus.bbx}[2014/05/11 v1.2]
\RequireBibliographyStyle{authoryear}

\ExecuteBibliographyOptions{firstinits=true,dashed=false}

\NewBibliographyString{computerprogram,availableat,website}
\DefineBibliographyStrings{german}{%
	andothers	= {et\,al\adddot},
	computerprogram = {Computerprogramm},
	availableat	= {Verfügbar unter},
	website		= {Webseite},
}	

\DeclareListFormat{language}{}
\DeclareFieldFormat{isbn}{}
\DeclareFieldFormat[inbook,book,article]{url}{}
\DeclareFieldFormat[inbook,book,article]{urldate}{}

\DeclareLabeldate{\field{origdate}\field{date}}


\DeclareFieldFormat{number}{\mkbibparens{#1}}

\renewcommand*{\labelnamepunct}{: }
\renewcommand*{\multilistdelim}{, }
\renewcommand*{\intitlepunct}{ }


\DeclareNameAlias{sortname}{last-first}

\DeclareFieldFormat
  [article,inbook,incollection,inproceedings,patent,thesis,unpublished]
  {title}{#1}
  
\DeclareFieldFormat[software]{title}{#1}
\DeclareFieldFormat[software]{version}{\mkbibparens{\bibcpstring{version}~#1}}

  
\renewbibmacro*{date+extrayear}{%
	\iffieldundef{labelyear}
	{\printtext[parens]{\bibstring{nodate}}}
	{\printtext[parens]{%
		\printfield{labelyear}%
		\printfield{extrayear}%
		\iffieldundef{origyear}
		{}
		{\addspace%
		\printtext[parens]{%
		\printfield{year}}}}}}%
		
\renewbibmacro*{date}{}%

\renewbibmacro*{issue+date}{%
	\iffieldundef{issue}
	{}
	{\printtext[parens]{\printfield{issue}}}%
	\newunit}%


\renewbibmacro*{editor+others}{%
  \ifboolexpr{
    test \ifuseeditor
    and
    not test {\ifnameundef{editor}}
  }
    {\printnames{editor}%
     \setunit{\addcomma\space}%
     \usebibmacro{editor+othersstrg}%
     \clearname{editor}%
     \addspace\usebibmacro{date+extrayear}}
    {}}



\renewbibmacro*{bbx:editor}[1]{%
	\ifboolexpr{
		test \ifuseeditor
		and
		not test {\ifnameundef{editor}}
	}
	{\usebibmacro{bbx:dashcheck}
		{\bibnamedash}
		{\printnames{editor}%
		\setunit{\space}%
		\usebibmacro{bbx:savehash}}%
		\printtext[parens]{\usebibmacro{#1}}%
		\clearname{editor}%
		\setunit{\addspace}}%
	{\global\undef\bbx@lasthash
		\usebibmacro{labeltitle}%
		\setunit*{\addspace}}}



\newbibmacro*{apa:softwaretitle}{%
  \printtext[title]{%
  \printfield[apacase]{title}%
  \setunit{\subtitlepunct}%
  \printfield[apacase]{subtitle}}%
  \setunit{\addspace}%
  \iffieldundef{version}%
     {}
     {\printfield{version}}
  \printfield{titleaddon}%
  \addspace\bibopenbracket%
  \bibstring{computerprogram}%
  \bibclosebracket}

\newbibmacro*{softwareurl}{%
  \printtext{\iffieldundef{url}%
    {}
    {\bibstring{availableat}\addcolon\addspace\printfield{url}}}}



\newbibmacro*{shorttitle}{%
  \printtext{\iffieldundef{shorttitle}%
    {}
    {\printfield{shorttitle}\newunit}}}


\DeclareBibliographyDriver{inbook}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \usebibmacro{author/translator+others}%
  \setunit{\labelnamepunct}\newblock
  \usebibmacro{title}%
  \newunit
  \printlist{language}%
  \newunit\newblock
  \usebibmacro{byauthor}%
  \newunit\newblock
  \usebibmacro{in:}%
%  \usebibmacro{bybookauthor}%
% \newunit\newblock
  \usebibmacro{editor+others}%
  \newunit{:}\newblock
  \usebibmacro{maintitle+booktitle}%
  \newunit\newblock
  \printfield{edition}%
  \newunit
  \iffieldundef{maintitle}
    {\printfield{volume}%
     \printfield{part}}
    {}%
  \newunit
  \printfield{volumes}%
  \newunit\newblock
  \usebibmacro{series+number}%
  \newunit\newblock
  \printfield{note}%
  \newunit\newblock
  \usebibmacro{chapter+pages}%
  \newunit\newblock
  \usebibmacro{publisher+location+date}%
  \newunit\newblock
  \iftoggle{bbx:isbn}
    {\printfield{isbn}}
    {}%
  \newunit\newblock
  \usebibmacro{doi+eprint+url}%
  \newunit\newblock
  \usebibmacro{addendum+pubstate}%
  \setunit{\bibpagerefpunct}\newblock
  \usebibmacro{pageref}%
  \newunit\newblock
  \iftoggle{bbx:related}
    {\usebibmacro{related:init}%
     \usebibmacro{related}}
    {}%
  \usebibmacro{finentry}}

\DeclareBibliographyDriver{software}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \usebibmacro{author/editor}%
  \setunit{\labelnamepunct}\newblock
  \usebibmacro{apa:softwaretitle}%
  \newunit\newblock
%  \usebibmacro{publisher+location+date}%
%  \newunit\newblock
  \usebibmacro{doi+eprint+url}%
  \printfield{addendum}%
  \newunit\newblock
  \iftoggle{bbx:related}
    {\usebibmacro{related:init}%
     \usebibmacro{related}}
    {}%
  \usebibmacro{pageref}%
%  \usebibmacro{apa:finpunct}%
  \usebibmacro{finentry}}

\DeclareBibliographyDriver{online}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \usebibmacro{author/editor+others/translator+others}%
  \setunit{\labelnamepunct}\newblock
  \usebibmacro{shorttitle}%
  \usebibmacro{title}%
  \setunit{}
  \bibopenbracket\bibstring{website}\bibclosebracket
  \newunit
  \printlist{language}%
  \newunit\newblock
  \usebibmacro{byauthor}%
  \newunit\newblock
  \usebibmacro{byeditor+others}%
  \newunit\newblock
  \printfield{version}%
  \newunit
  \printfield{note}%
  \newunit\newblock
  \printlist{organization}%
  \newunit\newblock
  \usebibmacro{date}%
  \newunit\newblock
  \iftoggle{bbx:eprint}
    {\usebibmacro{eprint}}
    {}%
  \newunit\newblock
  \usebibmacro{url+urldate}%
  \newunit\newblock
  \usebibmacro{addendum+pubstate}%
  \setunit{\bibpagerefpunct}\newblock
  \usebibmacro{pageref}%
  \newunit\newblock
  \iftoggle{bbx:related}
    {\usebibmacro{related:init}%
     \usebibmacro{related}}
    {}%
  \usebibmacro{finentry}}

\endinput