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while [[ ${chapter} -le ${last_chapter} ]]

while [[ `echo "${chapter} <= ${last_chapter}" | bc` -eq 1 ]]

#!/bin/bash
 
base_url="http://www.onemanga.com"
manga_name=$1
chapter=$2
last_chapter=$3
 
if [[ "${chapter}" == "" ]]; then
    echo "getting latest chapter number..."
    latest_chapter=`curl -s ${base_url}/${manga_name}/ | grep -i "ch-subject" | grep -v -i "chapter name" | head -1 | awk -F\/ '{print $3}'`
    printf "the latest chapter of ${manga_name} is ${latest_chapter}. download it? ([y]/n): "
    read answer
 
    if [[ "${answer}" == "y" || "${answer}" == "" ]]; then
        chapter=$latest_chapter
    else
        exit
    fi
fi
 
if [[ "${last_chapter}" == "" ]]; then
    last_chapter=${chapter}
fi
 
while [[ `echo "${chapter} <= ${last_chapter}" | bc` -eq 1 ]]
do
    printf "downloading chapter ${chapter}\n[>"
    next_page_chapter=$chapter
    page_location=`curl -s ${base_url}/${manga_name}/${chapter}/ | grep -i "begin reading" | awk -F\" '{print $2}'`
 
    while [[ `echo "$next_page_chapter == $chapter" | bc` -eq 1 ]]
    do
        curl -s ${base_url}${page_location} > tmp_page
 
        image_location=`grep "class=\"manga-page\"" < tmp_page | awk -F\" '{print $4}'`
 
        if [[ "$image_location" != "" ]]; then
            printf "\b=>"
            wget -q $image_location
        fi
 
        page_location=`grep "value=\"next page\"" < tmp_page | awk -F\' '{print $2}'`
        next_page_chapter=`echo ${page_location} | cut -d\/ -f3`
    done
 
    cbr_file_name="${manga_name}_${chapter}.cbr"
    printf "\b]\ncreating ${cbr_file_name}... "
    /cygdrive/c/Program\ Files/WinRAR/Rar.exe a -inul ${cbr_file_name} *.jpg
    echo "DONE."
    rm *.jpg
 
    chapter=$next_page_chapter
done
 
rm tmp_page