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onemanga2 -c 350 Naruto
onemanga2 -c 90-97 Full_Metal_Alchemist
onemanga2 -c 200+ Air_Gear

onemanga2 -l Vagabond

onemanga2 20th_Century_Boys
onemanga2 -d Video_Girl_AI

onemanga2 -d -c 420 3x3_Eyes
onemanga2 -dl One_Piece
onemanga2 -d Zetman 

onemanga2 -dl Naruto Bleach Air_Gear Vagabond Bakuman
onemanga2 -d *

onemanga2 -do *

#!/bin/bash
#
# usage: onemanga [-dlo] [-c <first chapter>[+|-<last chapter>]] <manga name> [<manga name> ...]
#
 
trap "rm -f *.jpg tmp_*;" 0
 
base_url="http://www.onemanga.com"
base_dir=`pwd`
log="$base_dir/onemanga.log"
 
function calc() {
  echo "scale=2; $*" | bc -q 2>/dev/null | cut -f1 -d.
}
 
function echoes() {
  if [[ $2 -gt 0 ]]; then
    eval "for i in {${3:-1}..$2}; do echo -n '$1'; done"
  fi
}
 
function progressbar() {
  width=20
  current=$1
  total=$2
 
  percent=`calc "$current / $total * 100"`
  stack=`calc "$current / $total * $width"`
  stack=${stack:=0}
  space=`calc "$width - $stack"`
 
  echoes " " ${#percent} 3
  echo -n "$percent% ["
  echoes "#" $stack
  echoes " " $space
  echo "]"
}
 
while getopts ":c:dlo" op; do
  case $op in
    c)
      CHAPTER=1
      CHAPTER_ARG="$OPTARG"
      ;;
    d)
      USE_DIR=1
      ;;
    l)
      LATEST=1
      ;;
    o)
      LOG_FILE=1
      ;;
    \?)
      echo "unknown option: -$OPTARG" >&2
      ERROR=1
      ;;
  esac
done
 
shift $(($OPTIND - 1))
 
if [[ $CHAPTER -eq 1 && $LATEST -eq 1 ]]; then
  echo "invalid option: -c and -l cannot be used at the same time" >&2
  ERROR=1
fi
 
if [[ $ERROR -eq 1 ]]; then
  exit
fi
 
if [[ $CHAPTER = "" && $LATEST = "" ]]; then
  UPDATE=1
fi
 
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 "$@"; do
  manga_name=${manga_name%/}
 
  if [[ $USE_DIR -eq 1 ]]; then
    if [[ -f "$base_dir/$manga_name" ]]; then
      echo -e "\n$manga_name [SKIPPED]"
      echo "not a directory"
      continue
    fi
 
    mkdir -p "$base_dir/$manga_name"
    cd "$base_dir/$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 $sort_key -t_ | head -n1`
  local_chapter=`basename "${local_chapter##*_}" .cbr`
 
  if [[ `echo "$local_chapter == 0" | bc` -eq 0 ]]; then
    local_chapter=`echo $local_chapter | sed "s/^0*//g"`
  fi
 
  echo -ne "\nopening $base_url/$manga_name..."
  wget -qN --no-cache $base_url/$manga_name/
 
  if [[ ! -f "index.html" ]]; then
    echo -e "\b\b\b [ERROR]\nthe url seems to be invalid, or there may be a problem with your internet connection"
    exit
  fi
 
  grep "ch-subject" index.html 2> /dev/null | grep "a href" | cut -f3 -d\/ > tmp_chapters
 
  if [[ ! -s tmp_chapters ]]; then
    echo -e "\b\b\b [ERROR]\ncannot extract chapters info from the url"
    exit
  fi
 
  echo -e "\b\b\b [OK]"
 
  latest_chapter=`head -1 tmp_chapters`
 
  if [[ -n $local_chapter && ! $CHAPTER -eq 1 ]]; then
    echo "local chapter: ${local_chapter} / latest chapter: $latest_chapter"
 
    if [[ $local_chapter == $latest_chapter ]]; then
      echo "no updates found"
      continue
    fi
  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
 
  if [[ $CHAPTER -eq 1 || -z $local_chapter ]]; then
    echo "from chapter: $first_chapter / to chapter: $last_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"
    echo -ne "\r\e[0K`progressbar 0 1` (initializing...)"
    page_location=`wget -qO - $base_url/$manga_name/$chapter/ | grep -i "begin reading" | cut -f2 -d\"`
    wget -qO tmp_page $base_url$page_location
    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}
 
    total=`echo $PAGES | wc -w`
    i=0
 
    for page in $PAGES; do
      let i++
      echo -ne "\r\e[0K`progressbar $i $total` ($i/$total)"
      wget -q "$image_location/$page.jpg"
    done
 
    int_part=${chapter%\.*}
    if [[ `echo "$int_part == 0" | bc` -eq 0 && ${#int_part} -lt 3 ]]; then
      chapter=`echoes "0" ${#int_part} 2`$chapter
    fi
 
    cbr_file_name="${manga_name}_${chapter}.cbr"
 
    echo -ne "\r\e[0K`progressbar $i $total` (packing files...)"
    if zip -q $cbr_file_name *.jpg; then
      rm -f *.jpg tmp_*
      echo -e "\r\e[0K`progressbar $i $total` ($cbr_file_name)"
      [[ $LOG_FILE -eq 1 ]] && echo "[`date +%c`] $cbr_file_name" >> "$log"
    fi
  done
done