#   convert_and_compress v0.02en made under debian lenny/sid using vim 7.1 
#
#   a very simple script that converts pictures and compress them with zip 
#   author:krzysztof szynter aka dygi gg:1027078 email:k.szynter@gmail.com
#
#        all rights are not reserved - copying modificating and using
#           are allowed but only for your own sole responsibility

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dygi@orion:~/test$ su -c 'apt-get install imagemagick zip unzip'

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dygi@orion:~/test$ dpkg --list | grep ' zip ' && dpkg --list | grep ' imagemagick ' 

ii  imagemagick                      7:6.2.4.5.dfsg1-1               Image manipulation programs
ii  zip                              2.32-1                          Archiver for .zip files
ii  unzip                            5.52-10                         De-archiver for .zip files

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dygi@orion:~/test$ ls -Al 

-rwxr-xr-x 1 dygi dygi   5368 2007-07-29 10:24 convert_and_compress_desc_en
-rwxr-xr-x 1 dygi dygi 916002 2007-07-29 01:24 p7220156.JPG
-rwxr-xr-x 1 dygi dygi 913534 2007-07-29 01:24 p7220157.JPG
-rwxr-xr-x 1 dygi dygi 915862 2007-07-29 01:24 p7220158.jpg
-rwxr-xr-x 1 dygi dygi 885128 2007-07-29 01:24 p7220159.jpg
-rwxr-xr-x 1 dygi dygi 888355 2007-07-29 01:24 p7220160.jpg

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dygi@orion:~/test$ ./convert_and_compress_v0.02en

- convert to mid and low res files [y/n]: y
- compress mid and low res files with zip [y/n]: y
- clean the mess in folder tree after all [y/n]: y

Counting graphic files in folder         [OK] :: 5 files
Creating folder ./temp                   [OK]
Copying *.jpg files into folder ./temp   [OK] :: 3 files
Copying *.JPG files into folder ./temp   [OK] :: 2 files
Changing working folder to ./temp        [OK]

Starting *.jpg convertion phase          [OK]
Starting *.JPG convertion phase          [OK]

Changing the original filenames to hires [OK]
Starting compression phase            

 1) compressing lowres files             [OK]
 2) compressing midres files             [OK]
 3) compressing hires files              [OK]


Starting cleaning phase                  [OK]

SUMMARY: There was no errors during the program work..

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dygi@orion:~/test$ ls -Al

-rw-r--r-- 1 root root 4449882 2007-07-29 14:17 compressed_hires.zip
-rw-r--r-- 1 root root  493949 2007-07-29 14:17 compressed_lowres.zip
-rw-r--r-- 1 root root  807420 2007-07-29 14:17 compressed_midres.zip
-rwxr-xr-x 1 dygi dygi    5026 2007-07-29 13:47 convert_and_compress_v0.02en
-rwxr-xr-x 1 dygi dygi  916002 2007-07-29 01:24 p7220156.JPG
-rwxr-xr-x 1 dygi dygi  913534 2007-07-29 01:24 p7220157.JPG
-rwxr-xr-x 1 dygi dygi  915862 2007-07-29 01:24 p7220158.jpg
-rwxr-xr-x 1 dygi dygi  885128 2007-07-29 01:24 p7220159.jpg
-rwxr-xr-x 1 dygi dygi  888355 2007-07-29 01:24 p7220160.jpg

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dygi@orion:~/test$ unzip compressed_lowres.zip 

Archive:  compressed_lowres.zip
  inflating: lowres_p7220156.JPG     
  inflating: lowres_p7220157.JPG     
  inflating: lowres_p7220158.jpg     
  inflating: lowres_p7220159.jpg     
  inflating: lowres_p7220160.jpg     

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dygi@orion:~/test$ unzip compressed_midres.zip 

Archive:  compressed_midres.zip
  inflating: midres_p7220156.JPG     
  inflating: midres_p7220157.JPG     
  inflating: midres_p7220158.jpg     
  inflating: midres_p7220159.jpg     
  inflating: midres_p7220160.jpg     

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dygi@orion:~/test$ unzip compressed_hires.zip 

Archive:  compressed_hires.zip
  inflating: hires_p7220156.JPG      
  inflating: hires_p7220157.JPG      
  inflating: hires_p7220158.jpg      
  inflating: hires_p7220159.jpg      
  inflating: hires_p7220160.jpg      

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dygi@orion:~/test$ ls -Al

-rw-r--r-- 1 root root 4449882 2007-07-29 14:17 compressed_hires.zip
-rw-r--r-- 1 root root  493949 2007-07-29 14:17 compressed_lowres.zip
-rw-r--r-- 1 root root  807420 2007-07-29 14:17 compressed_midres.zip
-rwxr-xr-x 1 dygi dygi    5026 2007-07-29 13:47 convert_and_compress_v0.02en
-rwxr-xr-x 1 dygi dygi  916002 2007-07-29 14:17 hires_p7220156.JPG
-rwxr-xr-x 1 dygi dygi  913534 2007-07-29 14:17 hires_p7220157.JPG
-rwxr-xr-x 1 dygi dygi  915862 2007-07-29 14:17 hires_p7220158.jpg
-rwxr-xr-x 1 dygi dygi  885128 2007-07-29 14:17 hires_p7220159.jpg
-rwxr-xr-x 1 dygi dygi  888355 2007-07-29 14:17 hires_p7220160.jpg
-rw-r--r-- 1 dygi dygi  107040 2007-07-29 14:17 lowres_p7220156.JPG
-rw-r--r-- 1 dygi dygi  105291 2007-07-29 14:17 lowres_p7220157.JPG
-rw-r--r-- 1 dygi dygi  105531 2007-07-29 14:17 lowres_p7220158.jpg
-rw-r--r-- 1 dygi dygi  115472 2007-07-29 14:17 lowres_p7220159.jpg
-rw-r--r-- 1 dygi dygi  106677 2007-07-29 14:17 lowres_p7220160.jpg
-rw-r--r-- 1 dygi dygi  172248 2007-07-29 14:17 midres_p7220156.JPG
-rw-r--r-- 1 dygi dygi  169034 2007-07-29 14:17 midres_p7220157.JPG
-rw-r--r-- 1 dygi dygi  169297 2007-07-29 14:17 midres_p7220158.jpg
-rw-r--r-- 1 dygi dygi  179350 2007-07-29 14:17 midres_p7220159.jpg
-rw-r--r-- 1 dygi dygi  164971 2007-07-29 14:17 midres_p7220160.jpg
-rwxr-xr-x 1 dygi dygi  916002 2007-07-29 01:24 p7220156.JPG
-rwxr-xr-x 1 dygi dygi  913534 2007-07-29 01:24 p7220157.JPG
-rwxr-xr-x 1 dygi dygi  915862 2007-07-29 01:24 p7220158.jpg
-rwxr-xr-x 1 dygi dygi  885128 2007-07-29 01:24 p7220159.jpg
-rwxr-xr-x 1 dygi dygi  888355 2007-07-29 01:24 p7220160.jpg

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dygi@orion:~/test$ more ./convert_and_compress_v0.02en

#!/bin/bash

#   convert_and_compress v0.02en made under debian lenny/sid using vim 7.1 
#
#   a very simple script that converts pictures and compress them with zip 
#   author:krzysztof szynter aka dygi gg:1027078 email:k.szynter@gmail.com
#
#        all rights are not reserved - copying modificating and using
#           are allowed but only for your own sole responsibility

# =======================================================================================================

# description
# a very simple script that converts pictures in ./ to lower resolution and compress them with zip
# it works on a copy of files, not on the original files, has three switches to choose at the beginning
# - convert phase [y/n]  :: goes on or shows the summary and exits
# - compress phase [y/n] :: compress each resoultion group of files into a separate zip file or do nth
# - clean the mess [y/n] :: cleans the mess executing `rm -rf ./temp` or do nth
# 
# if all options switched to 'y' the program creates the ./temp folder, copies the graphic files it found
# to the ./temp, converts files to mid and low resolution files, changes the original filenames to hires,
# compress each resolution group of files to a separate zip file, moves them ../ and remove a whole ./temp
# so at the end you have 3 more files in ./ (zipped: low, mid and the original-hi res graphic files)
#
# limitations
# - only .jpg and .JPG files for a while ! have to add other formats 'convert' allows

# =======================================================================================================

# CONST 

LOW_RES_MODE='800x600'
MID_RES_MODE='1024x768'

# VAR

error_status='0'

# main program

clear

echo -en "- convert to mid and low res files [y/n]: "
read convert_status

if [ "$convert_status" = 'y' ]
then
  echo -en "- compress mid and low res files with zip [y/n]: "
  read compress_status

  echo -en "- clean the mess in folder tree after all [y/n]: "
  read clean_status
fi

#echo -ne "\nPress ENTER to continue: "
#read   

echo -en "\nCounting graphic files in folder       "

jpg_files_cnt=`ls -1 *.jpg | wc -l`
JPG_files_cnt=`ls -1 *.JPG | wc -l`

graphic_files_sum_cnt=$(($jpg_files_cnt+$JPG_files_cnt))

if [ "$jpg_files_cnt" -ge '1' ]
then

  files_cnt='0'
  for i in `ls -1 *.jpg`;
  do 

    files_cnt="$(($files_cnt+1))";
    arr_files_jpg[$(($files_cnt))]="$i";

  done

fi

if [ "$JPG_files_cnt" -ge '1' ]
then

  files_cnt='0'
  for i in `ls -1 *.JPG`;
  do 

    files_cnt="$(($files_cnt+1))";
    arr_files_JPG[$(($files_cnt))]="$i";

  done

fi

echo -en "  [OK] :: $graphic_files_sum_cnt files\n"

if [ "$convert_status" = 'y' ]
then

  echo -n 'Creating folder ./temp                 '
  mkdir ./temp && echo '  [OK]'

  if [ "$jpg_files_cnt" -ge '1' ]
  then 
    echo -n 'Copying *.jpg files into folder ./temp '
    cp ./*.jpg ./temp && echo -e "  [OK] :: $jpg_files_cnt files"
  fi

  if [ "$JPG_files_cnt" -ge '1' ]
  then 
    echo -n 'Copying *.JPG files into folder ./temp '
    cp ./*.JPG ./temp && echo -e "  [OK] :: $JPG_files_cnt files"
  fi

  echo -n 'Changing working folder to ./temp      ' 
  cd ./temp && echo -e "  [OK]\n"

  echo -ne "Starting *.jpg convertion phase        "

  if [ "$jpg_files_cnt" -ge '1'  ]
  then

    for i in `seq 1 ${#arr_files_jpg[*]}`
    do 
      convert "${arr_files_jpg[$i]}" -resize "$MID_RES_MODE" "midres_${arr_files_jpg[$i]}"
      convert "midres_${arr_files_jpg[$i]}" -resize "$LOW_RES_MODE" "lowres_${arr_files_jpg[$i]}"
    done

  fi

  echo -e "  [OK]"

  echo -ne "Starting *.JPG convertion phase        "

  if [ "$JPG_files_cnt" -ge '1'  ]
  then

    for i in `seq 1 ${#arr_files_JPG[*]}`
    do 
      convert "${arr_files_JPG[$i]}" -resize "$MID_RES_MODE" "midres_${arr_files_JPG[$i]}"
      convert "midres_${arr_files_JPG[$i]}" -resize "$LOW_RES_MODE" "lowres_${arr_files_JPG[$i]}"
    done

  fi

  echo -e "  [OK]\n"

  echo -n 'Changing the original filenames to hires'
  for i in `ls -1 | grep -v lowres | grep -v midres`; do mv $i hires_$i; done && echo -e " [OK]"

else

  echo -en "\nConverting phase    [OMITTED]"

fi

if [ "$compress_status" = 'y' ]
then

  echo -e "Starting compression phase            \n"

  echo -n ' 1) compressing lowres files           '
  zip -q compressed_lowres.zip lowres* && echo '  [OK]'
  
  echo -n ' 2) compressing midres files           '
  zip -q compressed_midres.zip midres* && echo '  [OK]'
  
  echo -n ' 3) compressing hires files            '
  zip -q compressed_hires.zip hires* && echo -e "  [OK]\n"

else

  echo -e "\nCompressing phase   [OMITTED]"

fi
  
if [ "$clean_status" = 'y' ]
then

  echo -ne "\nStarting cleaning phase                "

  mv ./*zip ../ && cd ../ && rm -rf ./temp && echo -e "  [OK]\n"

else

  echo -e "Cleaning phase      [OMITTED]\n"

fi

if [ "$error_status" = '1' ]
then 
  echo -e "SUMMARY: An unknown error has occur during the program work - check the folder tree..\n"
else 
  echo -e "SUMMARY: There wasn't errors during the program work..\n"
fi