improve module

scanbuddy.sh

@@ -0,0 +1,132 @@
+#!/usr/bin/env bash
+
+# option values for the brother DS-740D scanner
+simplex_source='Automatic Document Feeder(left aligned)'
+duplex_source='Automatic Document Feeder(left aligned,Duplex)'
+color_mode='24bit Color[Fast]'
+bw_mode='Black & White'
+grayscale_mode='True Gray'
+valid_resolutions=("100" "150" "200" "300" "400" "600" "1200")
+
+# default options for scanning
+sides=$simplex_source
+mode='c'
+resolution='300'
+
+current_page=$(find "$PWD" -name "out*.pdf" | sort | tail -n 1);
+read -r current_pageno <<<"${current_page//[^0-9]/ }"
+current_pageno=${current_pageno:-0}
+last_out_file="out$current_pageno.pdf"
+next_out_file="out$((current_pageno+1)).pdf"
+
+scan() {
+  # device="brother5:bus2;dev2"
+  device=$(scanimage -f "%d%n" | grep brother5 | head -n 1)
+  echo "Selecting scanner '$device'"
+
+  usage() {
+    echo "scanbuddy.bash scan -d -r <resolution($resolution)> -b <c|b|g>"
+  }
+
+  while getopts "dr:c:" flag; do
+    case ${flag} in
+     d) 
+       echo "Scanning duplex"
+       sides=$duplex_source
+       ;;
+     r)
+       if [[ ! " ${valid_resolutions[*]} " =~ [[:space:]]${OPTARG}[[:space:]] ]]; then
+         echo "Resolution '$OPTARG' not supported!"
+         echo "Supported resolutions: $(printf %s "${valid_resolutions[*]}")"
+         exit 1
+       fi
+       resolution=$OPTARG
+       ;;
+     c)
+       mode=$OPTARG
+       ;;
+     *)
+       ;;
+    esac
+  done
+
+  case $mode in
+    c)
+      scanner_mode=$color_mode
+      ;;
+    b)
+      scanner_mode=$bw_mode
+      ;;
+    g)
+      scanner_mode=$grayscale_mode
+      ;;
+    *)
+      echo "Mode '$mode' not supported! Supported modes: (c)olour|(b)lack & white|(g)reyscale"
+      ;;
+  esac
+
+  echo "Scanning to '$next_out_file'..."
+  scanimage \
+    --device-name="$device" \
+    --format=pdf \
+    --output-file="$next_out_file" \
+    --mode="$scanner_mode" \
+    --resolution="$resolution" \
+    --source="$sides" \
+    -x 210 -y 297 # A4 
+}
+
+clean() {
+  echo "Cleaning up..."
+  rm -rfv "$PWD/out*.pdf"
+}
+
+dispatch() {
+  readarray -d '' out_files < <(find . -regextype posix-awk -regex "\./out[0-9]+\.pdf" -print0 | sort -Vz)
+  combined_file=$(mktemp --suff="_scanbuddy.pdf")
+  gs -q -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE="$combined_file" -dBATCH "${out_files[@]}"
+  echo "Merged pdf written to $combined_file"
+
+  # TODO
+  if [ ! -v PAPERLESS_TOKEN ]; then 
+    true 
+  fi
+
+  # send to paperless
+  PAPERLESS_STATUS=$(curl \
+    -H "Authorization: Token $PAPERLESS_TOKEN" \
+    -F document=@"$combined_file" \
+    "$([ -v PAPERLESS_TAG ] && echo "-F tags=$PAPERLESS_TAG")" \
+    "${PAPERLESS_URL}/api/documents/post_document/") || FAILED=1
+
+  if [ -v FAILED ]; then
+    printf "Paperless failed with message:\n%s" "$PAPERLESS_STATUS"
+  else
+    printf "Paperless consumption job: %s\n" "$PAPERLESS_STATUS"
+  fi
+
+  clean
+}
+
+if [ "$#" -lt 1 ]; then
+  echo "You need an argument!"
+  exit 1
+fi
+
+case "$1" in
+  scan)
+    scan "${@:2}"
+    ;;
+  unscan)
+    rm "$last_out_file"
+    ;;
+  dispatch)
+    dispatch "${@:2}"
+    ;;
+  clean)
+    clean
+    ;;
+  *)
+    echo "Usage: scanbuddy scan|unscan|dispatch|clean"
+    ;;
+esac