Script for creating book dash books from PDF for android app.

create_bookdashbook.sh

#/usr/local/bin/bash

# Prerequistes: You need to install imagemagick and pdfimages for this script to work
# Usage - ./convert_book.sh pdf_name.pdf
# output - zip file with images and bookdetails.json file
# This script assumes the normal structure of a book dash book and wont work for bigger books or books with different formatting to the standard book dash book
# it is always advised to check the output zipped file to ensure its correct

folderName=$(basename "$1")
folderName="${folderName%.*}"
echo $folderName
echo "Creating folder for book"
mkdir $folderName
mkdir $folderName/images
convert -colorspace rgb -density 120 -background white -alpha remove $1 -scene 1 $folderName/images/Page_%02d.jpg


for i in {03..17};
do
    convert $folderName/images/Page_${i}.jpg -crop 50x100% -delete 1 +repage -set filename:original %t $folderName/images/%[filename:original]a.jpg
	convert $folderName/images/Page_${i}.jpg -flop -crop 50x100% -flop -delete 1 +repage -set filename:original %t $folderName/images/%[filename:original]b.jpg
	convert $folderName/images/Page_${i}a.jpg -scale 700x700 $folderName/images/Page_${i}a.jpg
	rm $folderName/images/Page_${i}.jpg
done  

imagesToSplit=`ls $folderName/images/*.jpg`
for i in ${imagesToSplit};
do
  convert ${i} -scale 700x700 {i}
done  


#create Bookdetails.json
bookDescriptonJson='{
    "pages": [
        {
            "pageNumber": 0,
            "image": "/images/Page_01.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 1,
            "image": "/images/Page_03a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 2,
            "image": "/images/Page_03b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 3,
            "image": "/images/Page_04a.jpg",
            "audio": null,
            "text": ""
        },
        {
            "pageNumber": 4,
            "image": "/images/Page_04b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 5,
            "image": "/images/Page_05a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 6,
            "image": "/images/Page_05b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 7,
            "image": "images/Page_06a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 8,
            "image": "/images/Page_06b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 9,
            "image": "/images/Page_07a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 10,
            "image": "/images/Page_07b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 11,
            "image": "/images/Page_08a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 12,
            "image": "/images/Page_08b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 13,
            "image": "/images/Page_09a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 14,
            "image": "/images/Page_09b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 15,
            "image": "/images/Page_10a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 16,
            "image": "/images/Page_10b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 17,
            "image": "/images/Page_11a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 18,
            "image": "/images/Page_11b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 19,
            "image": "/images/Page_12a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 20,
            "image": "/images/Page_12b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 21,
            "image": "/images/Page_13a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 22,
            "image": "/images/Page_13b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 23,
            "image": "/images/Page_14a.jpg",
            "audio": null,
            "text": null
       },
        {
            "pageNumber": 24,
            "image": "/images/Page_14b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 25,
            "image": "/images/Page_15a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 26,
            "image": "/images/Page_15b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 27,
            "image": "/images/Page_16a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 28,
            "image": "/images/Page_16b.jpg",
            "audio": null,
            "text": null
         },
        {
            "pageNumber": 29,
            "image": "/images/Page_17a.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 30,
            "image": "/images/Page_17b.jpg",
            "audio": null,
            "text": null
        },
        {
            "pageNumber": 31,
            "image": "/images/Page_18.jpg",
            "audio": null,
            "text": null
        }
    ]
}'
echo "Creating bookdetails.json"
echo $bookDescriptonJson > $folderName/bookdetails.json

echo "Zipping up folder"
zip -r $folderName $folderName