#!/usr/bin/env bash

# Sends file(s) or stdin to http://sprunge.us

set -e

usage() {
    more <<EOL
Usage: ${0##*/} [-l LANG] [FILE]

Uploads text files/input to sprunge.us, and image/binaries to transfer.sh.

Options:
  -l LANG   Specify file extension for syntax highlight. Only for text.
  -h        This information.

Examples:
  ${0##*/} script.py
  ${0##*/} -l py sometext
  echo "Hello world" | bin
  echo "puts 'Hi'" | bin -l rb
EOL
}

sprunge() {
    while read in; do
        echo "$in"
    done < ${1:-/dev/stdin} \
        | curl --progress-bar -F 'sprunge=<-' http://sprunge.us \
        | head -n 1 \
        | tr -d '\r\n '
}

#
while getopts hl: opt; do
    case $opt in
        l)  lang="?$OPTARG"
            ;;
        [h?])
            usage
            exit
            ;;
        :)  >&2 echo "$OPTARG requires an argument"
            usage
            exit 1
            ;;
    esac
done
shift $((OPTIND-1))

if (($# == 0)) && [[ -t 0 ]]; then
    >&2 echo "Nothing in stdin and no files specified!"
    >&2 usage
    exit 1
fi

# Naive lang detection from file extension
[[ "$1" = *.* && -z "$lang" ]] && lang="?${1##*.}"

# Read from stdin or read file(s)
url=$(sprunge $1)

# Assemble URL+langstr and send to clipboard
printf "%s%s" "$url" "$lang" | pbcopy

# Show URL to interactive users
[[ -t 0 ]] && pbpaste