Create a pidgin smily from an image file

add-pidgin-smiley.sh

#!/bin/bash

#- add-pidgin-smily 0.1
#- Copyright (C) 2014 Jake Heidt admin@jheidt.com

##
## 
## :D :D :D CREATES PIDGIN SMILIES :D :D :D
##
## 
## Usage: add-pidgin-smily [options] IMAGE_FILE [SHORTCUT] [DIMENSIONS]
## 
## arguments:
##
##      IMAGE_FILE: required, the image to make a smiley
##      SHORTCUT:   optional, if not specified a cleaned version of the filename is used
##      DIMENSIONS: optional, if not specified in the format of INTxINT, the default of 80x80 is used
##
## options:
##
##       --help                 Display this usage message
##       --verbose              Display diagnostic messages
##       --replace              If the shortcut already exists in pidgin, replace that shortcut, otherwise an error is raised
##       --force                If a destination file already exists during processing, overwrite that file
##       --shortcut=SHORTCUT    Alternate way of specifying the shortcut to use
##
## Requires imagemagick to be installed on your machine. It probably already is, however.
##

help=$(grep "^## " "${BASH_SOURCE[0]}" | cut -c 4-)
version=$(grep "^#- "  "${BASH_SOURCE[0]}" | cut -c 4-)

option_verbose=0
option_replace=0
option_force=0
option_help=0
option_version=0
option_optimize=0

TEMP=`getopt -o hvrfss: --long help,version,verbose,replace,force,optimize,shortcut: -n 'test.sh' -- "$@"`
eval set -- "$TEMP"

# extract options and their arguments into variables.
while true ; do
    case "$1" in
        -h|--help) 
            option_help=1 ;
            shift ;;
        -o|--optimize) 
            option_optimize=1 ;
            shift ;;
        --version) 
            option_version=1 ;
            shift ;;
        -r|--replace) 
            option_replace=1 ;
            shift ;;
        -v|--verbose) 
            option_verbose=1 ;
            shift ;;
        -f|--force) 
            option_force=1 ;
            shift ;;
        -s|--shortcut) 
            case "$2" in
                "") shift 2 ;;
                *) shortcut_name=$2 ; shift 2 ;;
            esac ;;            
        --) shift ; break ;;
        *) echo "Internal error!" ; exit 1 ;;
    esac
done

if [[ $option_help != 0 ]]; then
    echo "option_help: $option_help"
    echo "$help"
    exit
elif [[ $option_version != 0 ]]; then
    echo "$version"
    exit
fi

source_image=$1
if [[ -z $source_image ]]; then
    echo $help
    echo 'ERROR: required image file name'
    exit 1
fi

if [[ -z $shortcut_name ]]; then
    shortcut_name=$2
fi
dimensions=${3:-80x80}

image_file=$(basename $source_image)
smiley_dir=$HOME/.purple/custom_smiley
smiley_xml=$HOME/.purple/smileys.xml
smiley_xml_backup=$HOME/.purple/smileys-backup.xml
image_tmp=/tmp/${image_file}
smiley_xml_work=/tmp/smileys.xml

if [[ -f "${image_tmp}" ]]; then
    rm ${image_tmp}
fi

if [[ -f "${smiley_xml_work}" ]]; then
    rm ${smiley_xml_work}
fi

[[ $option_verbose != 0 ]] && echo "[execute] convert $source_image -resize $dimensions\> $image_tmp"
convert $source_image -resize $dimensions\> $image_tmp
if [[ $? != 0 ]]; then
    rv = $?
    echo "[ERROR] during convert: $rv"
    exit $rv
fi

image_name=${image_file%.*}
image_ext=${image_file##*.}
image_ext=${image_ext,,}

if [[ $option_optimize != 0 ]]; then
    case "${image_ext}" in
        png|gif|bmp)
            if which optipng &>/dev/null ; then
                optipng --quiet ${image_tmp}
            else
                [[ $option_verbose != 0 ]] && echo "WARNING: optipng not found in path. can not optimize ${image_file}."
            fi
        ;;

        jpg|jpeg)
            if which jpegoptim &>/dev/null ; then
                jpegoptim --quiet ${image_tmp}
            else
                [[ $option_verbose != 0 ]] && echo "WARNING: jpegoptim not found in path. can not optimize ${image_file}."
            fi
        ;;

        *)
            echo "Cant optimize unknown image extension: ${image_ext}"
        ;;
    esac
fi

image_sha1=$(sha1sum $image_tmp)
image_sha1=${image_sha1:0:40}
image_dest=${image_sha1}.${image_ext}
image_dest_path=${smiley_dir}/${image_dest}

if [[ -z ${shortcut_name} ]]; then
    shortcut_name=":${image_name//[[:space:]]/_}:"
else
    shortcut_name=${shortcut_name/^[:!*]/}
    shortcut_name=${shortcut_name/[:!*]$/}
fi

echo "processing: ${image_name}"

if [[ $option_verbose != 0 ]]; then
    echo "image_sha1: ${image_sha1}"    
    echo "  shortcut: ${shortcut_name}"
    echo "image_name: ${image_name}" 
    echo " image_ext: ${image_ext}" 
    echo "image_dest: ${image_dest}"
    echo "dimensions: ${dimensions}"
    echo " [replace]: ${option_replace}"
    echo "   [force]: ${option_force}"
    echo ""
fi

if [[ $option_replace != 0 ]]; then    
    xml_start=`head --lines=-3 <(grep -Ev "shortcut='${shortcut_name}'" ${smiley_xml})`
    xml_end=`tail --lines=3 <(grep -Ev "shortcut='${shortcut_name}'" ${smiley_xml})`
elif grep -F "shortcut='${shortcut_name}'" ${smiley_xml} &>/dev/null ; then
    echo "==================================================="
    echo "ERROR - shortcut already exists"
    echo ""    
    grep -F "shortcut='${shortcut_name}'" ${smiley_xml}
    echo "==================================================="
    echo "[option] --replace not set - can not continue."
    exit 1
else
    xml_start=$(head --lines=-3 $smiley_xml)
    xml_end=$(tail --lines=3    $smiley_xml)    
fi

xml_line="\t\t\t<smiley shortcut='${shortcut_name}' checksum='${image_sha1}' filename='${image_dest}'/>"

if [[ -f "${image_dest_path}" ]]; then
    [[ $option_verbose != 0 ]] && echo "target image ${image_dest_path} exists. deleting."
    rm ${image_dest_path}
fi

#
# make a backup of the xml
#

# [[ $option_verbose != 0 ]] && echo "Making a backup of smileys.xml to $smiley_xml_backup"
# cp $smiley_xml $smiley_xml_backup

echo "$xml_start"     > $smiley_xml_work
echo -e "$xml_line"  >> $smiley_xml_work
echo "$xml_end"      >> $smiley_xml_work

cp $image_tmp $image_dest_path
cp $smiley_xml_work $smiley_xml