#!/bin/bash

read -e -p "Enter your status: " status
test -z "$status" && exit 1

test -z "$TWITTER_USER" && read -e -p "Enter your Twitter username: " TWITTER_USER
test -z "$TWITTER_PASS" && read -s -p "Enter your Twitter password: " TWITTER_PASS
echo

while true; do
    read -e -p "Choose an image to upload to TwitPic (optional): " image
    test -z "$image" && break

    ext=$(echo ${image##*.} | tr "[:upper:]" "[:lower:]")

    if [ -f $image -a \( $ext = gif -o $ext = jpg -o $ext = jpeg -o $ext = png \) ]; then
	break
    fi

    echo "Please choose a valid image file (GIF, JPG, or PNG)"
done

if [ -n "$image" ]; then
    echo "Posting to TwitPic..."
    curl -k -F "media=@$image" -F "username=$TWITTER_USER" -F "password=$TWITTER_PASS" -F "message=$status" https://twitpic.com/api/uploadAndPost
    echo
else
    echo "Posting to Twitter..."
    curl -k -u $TWITTER_USER:$TWITTER_PASS -d status="$status" https://twitter.com/statuses/update.xml
fi