From d6d75a587079e31608b393427c20aee5d6872922 Mon Sep 17 00:00:00 2001
From: Karma Riuk <riukkarma@gmail.com>
Date: Sat, 22 May 2021 00:37:34 +0200
Subject: [PATCH] First draft of the script

---
 scantopdf | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100755 scantopdf

diff --git a/scantopdf b/scantopdf
new file mode 100755
index 0000000..2fd8b35
--- /dev/null
+++ b/scantopdf
@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+set -e
+
+TMP_DIR="`mktemp -d`"
+
+## Args
+OPTIONAL_FLAGS=( \
+    "-v" "--verbose" \
+    "-c" "--config" \
+    "-h" "-?" "--help" \
+)
+
+verbose () {
+    [[ $VERBOSE = 1 ]] && echo "$1"
+}
+
+
+pdf_to_jpg () {
+    verbose "Converting the scan '$1' to jpg"
+
+    convert -density 300 -quality 100 "$1" "$TMP_DIR/out.jpg"
+}
+
+tesseract_jpgs () {
+    verbose "Applying tesseract to the jpgs"
+
+    for file in $TMP_DIR/out-*.jpg; do
+        tesseract "$file" "$TMP_DIR/$(basename "$file" .jpg)" -l deu PDF
+    done
+}
+
+concat_pdfs () {
+    new_pdf_name="$(basename "$1" .pdf) - EDITABLE.pdf"
+    verbose "Concatenating all the pdfs into '$new_pdf_name'"
+
+    pdfunite "$TMP_DIR"/out-*.pdf ./"$new_pdf_name"
+}
+
+usage () {
+    cat << EOF
+scantopdf - A quick bash script that wraps around tesseract to make book scans "editable"
+
+Usage:  scantopdf [-v|--verbose] input.pdf
+        scantopdf [-h|-?|--help]
+
+Options:
+    input.pdf                           the file you want to make editable
+
+Optional arguments:
+    -v, --verbose                       print each step the script passes through
+    -h, -?, --help                      show this message
+EOF
+}
+
+while [[ " ${OPTIONAL_FLAGS[@]} " =~ " $1 " ]]; do
+    verbose && echo "Checking for optional arguments"
+
+    case $1 in 
+        -v|--verbose)
+            VERBOSE=1
+            echo "Setting \$VERBOSE to true (\$VERBOSE=$VERBOSE)"
+            shift
+            ;;
+        -h|-\?|--help)
+            verbose "Detected -h, -? or --help"
+            usage
+            exit
+            ;;
+    esac
+done
+
+export TESSDATA_PREFIX="$HOME/tesseract/tessdata"
+
+if [[ "$1" ]]; then
+    if [[ "$1" =~ \.pdf$ ]] && [[ -f "$1" ]]; then
+        pdf_to_jpg "$1"
+        tesseract_jpgs 
+        concat_pdfs "$1"
+    else
+        echo "The file you gave me isn't a pdf or doesn't exist, so I can't perform the convertion."
+    fi
+else
+    echo "You have to give me the name of the pdf you want to make editable."
+fi