Added merge2pdf

Made this due to a teacher requesting it

merge2pdf-withdates.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 <parent_directory>"
+    exit 1
+fi
+
+parent_directory="$1"
+olddir=$(pwd)
+
+# Check if the parent directory exists
+if [ ! -d "$parent_directory" ]; then
+    echo "Error: Parent directory does not exist."
+    exit 1
+fi
+
+# Loop through subdirectories
+for subdir in "$parent_directory"/*/; do
+
+    pdffiles=""
+    subdirname=$(basename "$subdir")
+    image_path="$subdir/index.pdf"
+    
+    # Generate the image
+    convert -size 600x870 xc:white -font "Liberation-Sans" -pointsize 32 -fill black -gravity north -annotate +0+100 "Dokumente vom $subdirname" "$image_path"
+    
+    echo "Generated fontpage for $subdirname"
+
+    for xournal in $(find \"$subdir\" | grep xopp)
+    do
+      echo "Converting $xournal to pdf..."
+      xournalpp -p "$xournal".pdf "$xournal" >/dev/null
+    done
+    
+    echo "Merging PDF files from $subdir..."
+    pdffiles="$(find "$subdir" ! -name 'index.pdf' | grep pdf)"
+    pdftk "$subdir"index.pdf $pdffiles cat output "$1/$subdirname".pdf
+    
+done
+
+echo "Merging all PDFs into one large file..."
+subdirpdfs="$(ls $1 | grep '\.pdf')"
+
+cd $1
+pdftk $subdirpdfs cat output abgabe.pdf
+cd $olddir
+