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#!/bin/bash
#
# usage: onemanga [-d] [-l] [-u] [-c <first chapter>[+ | -<last chapter>]] <manga name> [<manga name> ...]
#
 
base_url="http://www.onemanga.com"
 
while getopts ":c:dlu" op; do
  case $op in
    c)
      if [[ $LATEST -eq 1 ]]; then
        echo "Invalid option: -c cannot be used with -l" >&2
        exit
      fi
 
      if [[ $UPDATE -eq 1 ]]; then
        echo "Invalid option: -c cannot be used with -u" >&2
        exit
      fi
 
      CHAPTER=1
      CHAPTER_ARG=$OPTARG
      ;;
    d)
      USE_DIR=1
      ;;
    l)
      if [[ $CHAPTER -eq 1 ]]; then
        echo "Invalid option: -l cannot be used with -c" >&2
        exit
      fi
 
      if [[ $UPDATE -eq 1 ]]; then
        echo "Invalid option: -c cannot be used with -u" >&2
        exit
      fi
 
      LATEST=1
      ;;
    u)
      if [[ $CHAPTER -eq 1 ]]; then
        echo "Invalid option: -u cannot be used with -c" >&2
        exit
      fi
 
      if [[ $LATEST -eq 1 ]]; then
        echo "Invalid option: -u cannot be used with -l" >&2
        exit
      fi
 
      UPDATE=1
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit
      ;;
  esac
done
 
shift $(($OPTIND - 1))
 
if [[ $CHAPTER -eq 1 ]]; then
  if [[ `expr index "$CHAPTER_ARG" ++` -gt 0 ]]; then
    first_chapter=${CHAPTER_ARG%+*}
    last_chapter="+"
  elif [[ `expr index "$CHAPTER_ARG" -` -gt 0 ]]; then
    first_chapter=${CHAPTER_ARG%-*}
    last_chapter=${CHAPTER_ARG#*-}
  else
    first_chapter=${CHAPTER_ARG}
    last_chapter=${CHAPTER_ARG}
  fi
fi
 
for manga_name in "$@"; do
  if [[ $USE_DIR -eq 1 ]]; then
    mkdir -p ${manga_name}
    cd ${manga_name}
  fi
 
  display_name=`echo ${manga_name} | sed "s/_/ /g"`
  word_count=`echo ${display_name} | wc -w`
  sort_key=$((word_count + 1))
  local_chapter=`ls ${manga_name}_*.cbr 2> /dev/null | sort -r -n -k ${sort_key} -t_ | head -n1`
  local_chapter=`echo ${local_chapter##*_} | cut -f1 -d\.`
 
  echo "fetching information from ${base_url}/${manga_name} ..."
  curl -s ${base_url}/${manga_name}/ > tmp_home
  grep "ch-subject" tmp_home | grep "a href" | cut -f3 -d\/ > tmp_chapters
 
  latest_chapter=`head -1 tmp_chapters`
 
  if [[ ${local_chapter} -eq ${latest_chapter} && ! $CHAPTER -eq 1 ]]; then
    echo "you already have the latest chapter of $display_name"
    cd ..
    continue
  fi
 
  if [[ $LATEST -eq 1 ]]; then
    first_chapter=${latest_chapter}
    last_chapter=${latest_chapter}
  fi
 
  if [[ "$last_chapter" = "+" ]]; then
    last_chapter=${latest_chapter}
  fi
 
  if [[ $UPDATE -eq 1 ]]; then
    if [[ $local_chapter == "" ]]; then
      first_chapter=`sort -n tmp_chapters | head -n1`
    else
      index=`sort -n tmp_chapters | grep -nm1 ${local_chapter} | cut -f1 -d:`
      first_chapter=`sort -n tmp_chapters | tail -n+$((index + 1)) | head -n1`
    fi
 
    last_chapter=${latest_chapter}
  fi
 
  index=`sort -n tmp_chapters | grep -nm1 ${first_chapter} | cut -f1 -d:`
  last_index=`sort -n tmp_chapters | grep -nm1 ${last_chapter} | cut -f1 -d:`
 
  CHAPTERS=`sort -n tmp_chapters | awk 'FNR >= '$index' && FNR <= '$last_index`
 
  for chapter in $CHAPTERS; do
    echo "downloading $display_name chapter $chapter"
    page_location=`curl -s --range -1500 ${base_url}/${manga_name}/${chapter}/ | grep -i "begin reading" | cut -f2 -d\"`
    curl -s ${base_url}${page_location} > tmp_page
    PAGES=`grep -i "option value" tmp_page | grep -i -v "select manga series" | cut -f2 -d\"`
    image_location=`grep -i "manga-page" tmp_page | cut -f4 -d\"`
    image_location=${image_location%/*.jpg}
 
    for page in $PAGES; do
      echo "downloading $image_location/$page.jpg ..."
      wget -q "$image_location/$page.jpg"
    done
 
    echo "creating CBR file ..."
    cbr_file_name="${manga_name}_${chapter}.cbr"
    zip ${cbr_file_name} *.jpg
    rm *.jpg tmp_*
  done
 
  if [[ $USE_DIR -eq 1 ]]; then
    cd ..
  fi
done

onemanga2 -c 440 Naruto
onemanga2 -c 351-360 Bleach
onemanga2 -c 4+ New_Prince_of_Tennis

onemanga2 -l Bakuman

onemanga2 -u Vagabond

onemanga2 -d -c 450 Naruto
onemanga2 -dl Hajime_no_Ippo
onemanga2 -ud Eyeshield_21 

onemanga2 -l Naruto Bleach Eyeshield_21 Vagabond
onemanga2 -ud *