Tieba pseudo-"dazzle" post generator

bddazz.sh

#!/bin/bash
# 20131221 - Add new font type - 1040006, 104900{1,2,3}

getglyphname(){
    if [ ! $1 == ' ' ]
    then {
        printf "%s.jpg\n" \
        $({
            LC_CTYPE=C.UTF-8 printf "baidu_dazz%x" "'$1" \
                | md5sum \
                | sed -r 's/^(.{4}).{24}(.{4}).*$/\1\2/g'
        })
    }; fi
}

render(){
    RES_PATH=/tmp/dazz_glyphs-$(cat /dev/urandom | tr -dc 'A-Za-z0-9' | head -c6)
    mkdir -p "$RES_PATH"
    echo 'Downloading texture...' 1>&2
    for (( i=0; i<${#2}; i++ )); do {
        # special effect
        case $1 in
            1040001)
                color=$(($RANDOM % 8 + 1));;
            1040013)
                if [ -z $color ] || [ $color == 2 ]; then
                    color=1
                else
                    color=2
                fi;;
        esac
        glyph=$(getglyphname ${2:$i:1})
        if [ -z $glyph ]
        then {
            echo 'null:' >> "$RES_PATH/glyphs.lst"
        }
        else {
            echo "$RES_PATH/$glyph" >> "$RES_PATH/glyphs.lst"
            printf "http://tb1.bdstatic.com/tb/fonts/$1$color/%s\n" $glyph
        }; fi
    }; done | wget -q -nc -i - -P $RES_PATH
    echo 'Generating image...' 1>&2
    montage @$RES_PATH/glyphs.lst \
        -tile "${3}x" -geometry "1x1+0+0<" "$4"
    rm -rf $RES_PATH
    echo 'Done' 1>&2
}

fontid(){
    case $1 in
        color) 
            echo 1040001;;
        square)
            echo 1040002;;
        cat)
            echo 1040003;; # animate
        cute)
            echo 1040004;;
        bulb)
            echo 1040005;;
        xmas)
            echo 1040006;;
        ny)
            echo 1040007;;
        train)
            echo 1040008;;
        ticket)
            echo 1040009;;
        fff)
            echo 1040010;;
        beer)
            echo 1040011;; # animate
        candle)
            echo 1040012;; # animate
        flower)
            echo 1040013;;
        star)
            echo 1049001;;
        crown)
            echo 1049002;;
        wing)
            echo 1049003;;
        *)
            font_id=$(echo $1 | sed -r 's/ID=(.*)/\1/g')
            if [ -z $font_id ] || [ -z $(echo $1 | grep 'ID=') ]; then
                echo 'Unknown font' 1>&2
                exit 1
            else
                echo $font_id
            fi
            ;;
    esac
}

usage(){
    echo "Usage: $0 [-f <font>] [-o <output>] [-l <line_width>] <text>" 1>&2
    cat 1>&2 << "EOS"
Fonts list: (default: color)
    color
    cat
    square
    bulb
    cute
    xmas
    ny
    train
    ticket
    fff
    beer
    candle
    flower
    star
    crown
    wing
EOS
}

if [ $# == 0 ]; then usage; exit 0; fi

while getopts ':f:o:l:' opt; do {
    case $opt in
        f)
            font=$(fontid $OPTARG) || exit 1;;
        o)
            output="$OPTARG";;
        l)
            lw=$OPTARG;;
        *)
            usage
            exit 1
            ;;
    esac
}; done
shift $((OPTIND-1))
if [ -z $font ]  ; then font=$(fontid 'color'); fi
if [ -z $lw ]    ; then lw=30                 ; fi
if [ -z $output ]; then output='-'            ; fi
if [ -z "$1" ]   ; then usage; exit 1         ; fi

render $font "$1" $lw $output