% Usage: \pic[<pct-of-columnwidth>]{<path-to-file>}
\newcommand{\pic}[2][50]{
\begin{center}
    \transparent{0.4}
    \includegraphics[width=0.#1\columnwidth]{#2}
\end{center}
}

% Usage: \fig{<path-to-file>}{<label>}{<caption>}
\newcommand{\fig}[4][]{
\begin{figure}[h!]
    \centering
    \includegraphics[width=0.8\columnwidth]{#2}
	%
    \sbox0{#1}%
	\ifdim\wd0=0pt
		{\caption{#4}} %if #1 is empty
	\else
		{\caption{#4\\\texttt{{\scriptsize #1}}}}
	\fi
    %
    \label{fig:#3}
\end{figure}
}

\newcommand{\xkcd}[2]{\fig{xkcd/#1}{#1}{#2\\%
{\tiny\MakeUppercase{https://imgs.xkcd.com/comics/#1.png}\hskip3mm%
License: \texttt{\href{https://creativecommons.org/licenses/by-nc/2.5/}{CC BY-NC 2.5}}%
}}}

% Usage: \svg{<path-to-file>}{<label>}{<caption>}
\newcommand{\svg}[3]{
    \begin{figure}[h]
        \centering
        \includesvg{#1}
        \caption{#3}
        \label{fig:#2}
    \end{figure}
}

\newcommand{\notice}[2]{%
    \shadowbox{%
        \begin{varwidth}{0.85\linewidth}
            \texttt{\textbf{#1}}\\
            #2
        \end{varwidth}
    }
}

\newcommand{\cliline}[2][]{\lstinline[columns=fixed,#1]{#2}}

\newcommand{\utccurrenttime}[0]{%
    \today%
    T%
    \DTMcurrenttime%
    \DTMfetchTZhour{now}%
    :%
    \DTMfetchTZminute{now}
}


\newcommand{\itemhead}[2][]{%
	\sbox0{#1}%
	\ifdim\wd0=0pt
		{\textbf{#2:}} %if #1 is empty
	\else
		{\textbf{#2:}\\{\footnotesize #1}}
	\fi
}
\newcommand{\itemtitle}[2]{%
	\sbox0{#1}%
	\ifdim\wd0=0pt
		{\itemhead{#1}} %if #2 is empty
	\else
		{\itemhead[#2]{#1}}
	\fi
}


\newcommand{\myquote}[2]{%
    \sbox0{#1}%
    \ifdim\wd0=0pt
        {\epigraph{#2}{\textit{{\tiny \theauthor}}}} %if #1 is empty
    \else
        {\epigraph{#2}{\textit{#1}}} %if quote is cited
    \fi    
}


% Enviroment @var txt
% changes code styling to: in frame, white bg.
\lstnewenvironment{txt}{\lstset{style=plaintxt}}{}


% Enviroment @var cisco
\lstnewenvironment{cisco}{\lstset{language=cisco}}{}


%\newcommand{cisline}[1]{\lstinline[columns=fixed]{network-device\# #1}}


%\newcommand{cisconf}[2][]{%
%\def\temp{#1}\ifx\temp\empty
%\lstinline[columns=fixed]{network-device(config)\# #2}
%\else
%\lstinline[columns=fixed]{network-device(config-#1)\# #2}
%\fi\}


\newcommand{\txtreflect}[1]{\reflectbox{#1}}
\newcommand{\txtupdown}[1]{\raisebox{\depth}{\rotatebox{270}{\reflectbox{\rotatebox{90}{#1}}}}}