From 24954718492a1ab4cc64d55aeb45b365016875ed Mon Sep 17 00:00:00 2001
From: Oliver Kopp <kopp.dev@gmail.com>
Date: Sun, 28 Jan 2018 18:11:54 +0100
Subject: [PATCH] Make bibliography files optional

---
 README.md         | 10 +++++++++-
 authorarchive.sty | 20 ++++++++++++++++----
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index c3549d6..1144a36 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,15 @@ be adapted easily to other layouts. For example,
 \renewcommand{\authorcrfont}{\scriptsize}
 \renewcommand{\authorat}[1]{\put(25,56.5){#1}}
 ```
-works nicely for Acta Informatica. 
+works nicely for Acta Informatica.
+
+## Embedding Bibliography Entries
+Mostly, it is hard for scientists to find the correct bibtex entry for a paper.
+One solution to this issue is to embed the respective `.bib`, `.enw`, `.ris`, or `.word.xml` file in the PDF directly.
+This work allows for that.
+In case any of these file exist in the current directory, it gets embedded in the PDF.
+
+You can generate these files by using [JabRef's export functionalities](https://help.jabref.org/en/#importexport).
 
 ## License
 If not otherwise stated, all sub-projects are dual-licensed under a
diff --git a/authorarchive.sty b/authorarchive.sty
index cebe1c9..fbaf8be 100644
--- a/authorarchive.sty
+++ b/authorarchive.sty
@@ -153,26 +153,38 @@
 
 \ifAA@nobib\relax\else%
 \AtBeginDocument{%
+  \IfFileExists{\AA@bibtexdir/\AA@key.bib}{%
   \embedfile[filespec=\AA@key.bib,%
              desc={BibTeX entry of this paper.},%
              stringmethod=escape,%
              mimetype=plain/text,%
-  ]{\AA@bibtexdir/\AA@key.bib}%
+  ]{\AA@bibtexdir/\AA@key.bib}}{
+    \typeout{No file \AA@bibtexdir/\AA@key.bib found. Not embedded reference in BibTeX format.}
+  }%
+  \IfFileExists{\AA@bibtexdir/\AA@key.enw}{%
   \embedfile[filespec=\AA@key.enw,%
              desc={Endnote entry of this paper.},%
              stringmethod=escape,%
              mimetype=plain/text,%
-  ]{\AA@bibtexdir/\AA@key.enw}%
+  ]{\AA@bibtexdir/\AA@key.enw}}{
+    \typeout{No file \AA@bibtexdir/\AA@key.enw found. Not embedded reference in Endnote format.}
+  }%
+  \IfFileExists{\AA@bibtexdir/\AA@key.ris}{%
   \embedfile[filespec=\AA@key.ris,%
              desc={RIS entry of this paper.},%
              stringmethod=escape,%
              mimetype=plain/text,%
-  ]{\AA@bibtexdir/\AA@key.ris}%
+  ]{\AA@bibtexdir/\AA@key.ris}}{
+    \typeout{No file \AA@bibtexdir/\AA@key.ris found. Not embedded reference in RIS format.}
+  }%
+  \IfFileExists{\AA@bibtexdir/\AA@key.word.xml}{%
   \embedfile[filespec=\AA@key.xml,%
              desc={XML entry of this paper (e.g., for Word 2007 and later).},%
              stringmethod=escape,%
              mimetype=plain/text,%
-  ]{\AA@bibtexdir/\AA@key.word.xml}%
+  ]{\AA@bibtexdir/\AA@key.word.xml}}{
+    \typeout{No file \AA@bibtexdir/\AA@key.word.xml found. Not embedded reference for Word 2007 and later.}
+  }%
 }%
 \fi
 \AtEndDocument{\label{LastPage}}