#!/bin/bash
#
# Use a scanner to obtain a pdf of a given file or files, then upload them.


SCAN_DIR="/tmp/scanner"
#SECRETS="~/.script-secrets.json"
SECRETS="./secrets.json"
mkdir -p $SCAN_DIR

declare -a SCANNED_IMAGES

scan_image() {
    local FILE_NAME="${SCAN_DIR}/scan_$(date +%s).pdf"

    sudo scanimage --format=pdf -o $FILE_NAME
    sudo chown $USER:$USER $FILE_NAME
    echo $FILE_NAME
}

ask_continue() {
    read -p "Is there another page? (Y/n) " choice
    [[ "${choice}" == "" || "${choice,,}" == "y" || ${choice,,} == "yes" ]]
}

ask_delete_temp_files() {
    read -p "Should we clean up our temporary files? (Y/n) " choice
    [[ "${choice}" == "" || "${choice,,}" == "y" || ${choice,,} == "yes" ]]
}

while true; do
    img=$(scan_image)
    SCANNED_IMAGES+=($img)

    if ! ask_continue; then
        break
    fi
done

echo $SCANNED_IMAGES

OUTPUT_PDF=output.pdf
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile="$OUTPUT_PDF" "${SCANNED_IMAGES[@]}"

PAPERLESS_ENABLED=$(jq -r '.paperless.enabled' $SECRETS)
echo "$PAPERLESS_ENABLED"

if [[ "${PAPERLESS_ENABLED,,}" == "true" ]]; then
    PAPERLESS_URL=$(jq -r ".paperless.url"      $SECRETS)
    PAPERLESS_USERNAME=$(jq -r ".paperless.username" $SECRETS)
    PAPERLESS_PASSWORD=$(jq -r ".paperless.password" $SECRETS)
    PAPERLESS_TAGS=$(jq -r ".paperless.tags" $SECRETS)


    AUTH_TOKEN=$(curl -s -X POST "${PAPERLESS_URL}/api/token/" -H "Content-Type: application/json" -d "{\"username\": \"${PAPERLESS_USERNAME}\", \"password\": \"${PAPERLESS_PASSWORD}\"}")
    AUTH_TOKEN=$(echo $AUTH_TOKEN | jq -r ".token")

    UPLOAD_RESPONSE=$(curl -s -X POST "${PAPERLESS_URL}/api/documents/post_document/" -H "Authorization: Token ${AUTH_TOKEN}" -F "document=@${OUTPUT_PDF}" -F "tags=${PAPERLESS_TAGS}")

    echo "Reply: ${UPLOAD_RESPONSE}"
fi



if ask_delete_temp_files; then
    rm -rf $SCAN_DIR
    echo "Temporary files cleaned up"
else
    echo "Temporary files kept in $FILE_DIR"
fi

echo "Document saved as $OUTPUT_PDF"