From f2d5f3008def250a6a10deca65d09b6c308cb8fc Mon Sep 17 00:00:00 2001
From: Borgal <mueller.lars@online.de>
Date: Wed, 17 Jul 2024 16:35:18 +0000
Subject: [PATCH] paperless/README.md aktualisiert

---
 paperless/README.md | 76 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 72 insertions(+), 4 deletions(-)

diff --git a/paperless/README.md b/paperless/README.md
index 196b402..b27d3c6 100644
--- a/paperless/README.md
+++ b/paperless/README.md
@@ -9,12 +9,80 @@
 <p></p>
 <a href="https://docs.paperless-ngx.com/" target="_blank">Paperless ngx</a>
 <p></p>
-<h3>HowTo</h3>
+<h2>HowTo</h2>
 <hr>
 <p></p>
-<h2>/etc/fstab Mount zu Scanner Verzeichniss</h2>
+<h4>/etc/fstab Mount zu Scanner Verzeichniss</h4>
 <p></p>
-<pre>192.168.0.102:/mnt/pool1/scanner /opt/paperless/consume nfs4 auto,mountvers=4.0 0 0</pre>
+<pre>192.168.0.102:/mnt/pool1/scanner /opt/paperless/consume nfs auto 0 0</pre>
 <p></p>
 <h5>gegebenfalls noch die NFS Tools installieren</h5>
-<pre>apt install nfs-common</pre>
\ No newline at end of file
+<pre>apt install nfs-common</pre>
+<p></p>
+<h4>Script für das entfernen von leeren Seiten</h4>
+<p></p>
+Added <kbd>/usr/src/paperless/scripts/pre-consume.sh</kbd>
+<p></p>
+<pre>
+#!/bin/sh
+set -x
+
+&num; Remove blank pages
+/scripts/remove-blank-pages.sh
+</pre>
+<p></p>
+<p></p>
+Added <kbd>/usr/src/paperless/scripts/remove-blank-pages.sh</kbd>
+<p></p>
+<pre>
+#!/bin/bash
+&num; set -x -e -o pipefail
+set -e -o pipefail
+export LC_ALL=C
+
+&num; IN="$1"
+IN="$DOCUMENT_WORKING_PATH"
+
+&num; Check for PDF format
+TYPE=$(file -b "$IN")
+
+if [ "${TYPE%%,*}" != "PDF document" ]; then
+  >&2 echo "Skipping $IN - non PDF [$TYPE]."
+  exit 0
+fi
+
+&num; PDF file - proceed
+
+&num; PAGES=$(pdfinfo "$IN" | grep ^Pages: | tr -dc '0-9')
+PAGES=$(pdfinfo "$IN" | awk '/Pages:/ {print $2}')
+
+>&2 echo Total pages $PAGES
+
+
+&num; Threshold for HP scanners
+THRESHOLD=1
+&num; Threshold for Lexmar MC2425
+&num; THRESHOLD=0.8
+
+
+non_blank() {
+  for i in $(seq 1 $PAGES) ; do
+    PERCENT=$(gs -o -  -dFirstPage=${i} -dLastPage=${i} -sDEVICE=ink_cov "${IN}" | grep CMYK | nawk 'BEGIN { sum=0; } {sum += $1 + $2 + $3 + $4;} END {  printf "%.5f\n", sum } ')
+    >&2 echo -n "Color-sum in page $i is $PERCENT: "
+    if awk "BEGIN { exit !($PERCENT > $THRESHOLD) }"; then
+      echo $i
+      >&2 echo "Page added to document"
+    else
+      >&2 echo "Page removed from document"
+    fi
+  done
+}
+
+NON_BLANK=$(non_blank)
+
+if [ -n "$NON_BLANK" ]; then
+  NON_BLANK=$(echo $NON_BLANK  | tr ' ' ",")
+  qpdf "$IN" --warning-exit-0 --replace-input --pages . $NON_BLANK --
+fi
+</pre>
+