\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{strath-letter}[2023/09/08 v2023.09.08 strath-letter]

\LoadClass[a4paper]{scrlttr2}
\ProcessOptions{}
\RequirePackage[protrusion=true, expansion=true]{microtype}
\RequirePackage[british]{isodate}
\RequirePackage{scrlayer-scrpage}
\RequirePackage[utf8]{inputenc}
\RequirePackage[T1]{fontenc}
\RequirePackage[british]{babel}
\RequirePackage{csquotes}
\RequirePackage{graphicx}
\RequirePackage{url}
\RequirePackage{xcolor}
\RequirePackage{relsize}
\RequirePackage{tabularx}
\RequirePackage{comment}
\RequirePackage{hyperref}
\RequirePackage{tgpagella}
\RequirePackage{helvet}
\RequirePackage{inconsolata}
\RequirePackage{tikz}

\RequirePackage{tikzpagenodes}
\RequirePackage{roboto}% Font for departmental banner


\definecolor{strath-corporate-main}{RGB/cmyk}{0,43,92/1.0,0.64,0,0.6}
\colorlet{strath-blue}{strath-corporate-main}

\definecolor{strath-corporate-secondary}{RGB/cmyk}{167,169,172/0.0,0.0,0.0,0.4}
\colorlet{strath-grey}{strath-corporate-secondary}

\definecolor{strath-faculty-engineering}{RGB/cmyk}{0,120,174/1.0,0.16,0.0,0.27}
\colorlet{strath-blue-light}{strath-faculty-engineering}

\definecolor{strath-faculty-science}{RGB/cmyk}{93,151,50/0.56,0.0,1.0,0.27}
\colorlet{strath-green}{strath-faculty-science}

\definecolor{strath-faculty-hass}{RGB/cmyk}{244,123,32/0.0,0.64,1.0,0}
\colorlet{strath-orange}{strath-faculty-hass}

\definecolor{strath-faculty-business}{RGB/cmyk}{238,50,36/0.0,0.95,1.0,0.0}
\colorlet{strath-red}{strath-faculty-business}

\definecolor{strath-web}{RGB/cmyk}{1,132,147/0.86,0.31,0.44,0.6}
\colorlet{strath-red}{strath-faculty-business}

\colorlet{fromdepartmentheader}{strath-green}

\newcommand{\email}[1]{\href{mailto:#1}{#1}}


\newkomavar[Computer Science \& Information Sciences]{fromdepartment}
\newkomavar[Computer Science \& Information Sciences]{fromdepartmentheader}
\newkomafont{fromdepartment}{\sffamily}
\newkomavar[Lecturer]{fromjobtitle}
\newkomafont{fromjobtitle}{\sffamily}

\newkomavar{strapline}
\setkomavar{strapline}{the place of useful learning}
\newkomafont{strapline}{\bfseries\sffamily}

\newkomavar{charityline}
\setkomavar{charityline}{The University of Strathclyde is a charitable body, registered in Scotland, charity number SC015263.}

\newkomafont{charityline}{\sffamily}

\setkomavar{fromaddress}{University of Strathclyde,\\ Glasgow, \\G1 1XH}

\newkomavar{photosig}
\setkomavar{photosig}{}
\newkomafont{sigfont}{\sffamily\bfseries}

% define the signature
\setkomavar{signature}
{%
  \Ifkomavar{photosig}{%
    \usekomavar{photosig}
    \\%
  }{}
  \usekomafont{sigfont}\usekomavar{fromname}
}
\hypersetup{%
   colorlinks=true
  ,linkcolor=strath-blue
  ,urlcolor=strath-blue
  ,citecolor=strath-blue
  }

\linespread{1.05}

\renewcommand*{\raggedsignature}{\raggedright}
\@setplength{sigindent}{\parindent}

\@setplength{toaddrvpos}{0.2\paperheight}
\@setplength{refvpos}{\useplength{toaddrvpos}}
\@addtoplength{refvpos}{0.5\useplength{toaddrheight}}%

% \@setplength{refvpos}{\useplength{toaddrvpos}}

\@setplength{sigbeforevskip}{.2\baselineskip}
\@setplength{subjectbeforevskip}{1em}
\@setplength{subjectaftervskip}{0em}

\@setplength{firstfootvpos}{\paperheight}
\@addtoplength[-]{firstfootvpos}{30mm}

\addtokomafont{fromname}{\LARGE}
\setkomafont{fromaddress}{\sffamily}
\addtokomafont{subject}{\sffamily}
\addtokomafont{toname}{\sffamily}
\addtokomafont{toaddress}{\sffamily}

\cfoot{\thepage\ of \letterlastpage}

\KOMAoptions{%
  fromphone=false,
  fromfax=false,
  fromemail=false,
  subject=afteropening,
  foldmarks=false,
  backaddress=false,
  fromlogo=on,
  firstfoot=on,
  firsthead=on,
  addrfield=topaligned,
  parskip=full,
 fromemail=on,
 fontsize=11pt,
 pagenumber=false,
 parskip=half-,
 enlargefirstpage=true
}

\setkomavar*{enclseparator}{Attached}

\setkomavar{firsthead}{%
\begin{tikzpicture}[remember picture,overlay,shift={(current page.north east)}]
  \node[anchor=north east,xshift=-3cm,yshift=0.2cm]{\usekomavar{fromlogo}};
\end{tikzpicture}
\begin{tikzpicture}[remember picture,overlay,shift={(current page.north east)}]
  \node[anchor=north east,xshift=-8.5cm,yshift=-3.85cm]
  {\small%
    \textsf{%
      \color{white}%
      \colorbox{strath-grey}{DEPARTMENT OF }%
      \colorbox{fromdepartmentheader}{ {\usekomavar{fromdepartmentheader}}}%
    }
  };
\end{tikzpicture}
}%

\setkomavar{firstfoot}
{%
  \hrule
  \begin{center}
    \smaller
    \begin{minipage}[c]{0.33\linewidth}
      \raggedright
  \begin{tabular}{l}
    \usekomafont{fromdepartment}\usekomavar{fromdepartment}
    \\
    \usekomafont{fromaddress}\usekomavar{fromaddress}
    \\
  \end{tabular}
    \end{minipage}
    \hfill
    \begin{minipage}[c]{0.33\linewidth}
      \raggedright
      \begin{tabular}{l}
    \usekomafont{sigfont}\usekomavar{fromname}
        \\
        \usekomafont{fromjobtitle}\usekomavar{fromjobtitle}
        \\
    \Ifkomavarempty{fromphone}{}{{\usekomavar{fromphone}}\\}%
    \Ifkomavarempty{fromemail}{}{{\usekomavar{fromemail}}\\}
  \end{tabular}
    \end{minipage}
    \hfill
    \begin{minipage}[c]{0.33\linewidth}
      \smaller
      \raggedleft%
      \noindent{\larger\usekomafont{strapline}\usekomavar{strapline}}\\[1em]
      \noindent{\usekomafont{charityline}\usekomavar{charityline}}
    \end{minipage}
  \end{center}
}
\endinput