#!/bin/bash

# dropimage 0.2
# Script that generates some thumbs & 
# constructs #! compatible forum code for easy image sharing

# usage:
# dropimage scrot.png or dropimage *.png

# needed:
# dropbox, dropbox, imagemagick/convert, xclip

# tmp dir http://mywiki.wooledge.org/BashFAQ/062


temp_dir=/tmp/$RANDOM # < this seems to be working on sid
trap '[ -n "$temp_dir" ] && rm -fr "$temp_dir"' EXIT
mkdir -m 700 "$temp_dir" || { echo '!! unable to create a tempdir' >&2; temp_dir=; exit 1; }

# checks

command -v dropbox >/dev/null 2>&1 || { echo >&2 "I require dropbox but it's not on PATH, exiting."; exit 1; }
command -v convert >/dev/null 2>&1 || { echo >&2 "I require imagemagicks/convert but it's not installed, exiting."; exit 1; }
command -v xclip >/dev/null 2>&1 || { echo >&2 "I require xclip but it's not installed, exiting."; exit 1; }
dropbox status | grep "isn't" && exit

# main 

while [ $# -gt 0 ]; do

base=$(basename "${1}")     # basename, like                file.png
base="${base%.*}"           # basename without extension    file
dir=$(dirname "${1}")
   
#echo "$dir/"
#echo "${base}"
#echo "$dir/${base}"

    # action
    convert "$1" -flatten -depth 8 -resize 160x "png:$dir/.${base}"
    
    # for area resizing one could use: -resize '@25600'
    
    # round corners http://www.imagemagick.org/Usage/thumbnails/
    convert "$dir/.${base}"  \
     \( +clone  -alpha extract \
        -draw 'fill black polygon 0,0 0,3 3,0 fill white circle 3,3 3,0' \
        \( +clone -flip \) -compose Multiply -composite \
        \( +clone -flop \) -compose Multiply -composite \
     \) -alpha off -compose CopyOpacity -composite "png:$dir/.${base}_"
     
     mv "$dir/.${base}_" "$dir/.${base}.png"
     # end round corners < remove this to disable rounded corners for thumbs

    
    imageurl="$(dropbox puburl "$1")"
    #echo "$imageurl < imageurl"
    
    thumburl="$(dropbox puburl "$dir/.${base}.png")"
    #echo "$thumburl < thumburl"
    
    all="[url=$imageurl][img]$thumburl[/img][/url]"
    echo "$all"
    
    printf "$all" >> "$temp_dir/clip"

    shift

done

xclip -i -selection clipboard "$temp_dir/clip"