#!/bin/sh
set -e
set -o pipefail

usage() {
  echo "$0 [-v] [<name>]"
  echo "publish screenshot to ipfs."
  exit 0
}

die() {
  echo >&2 "error: $@"
  exit 1
}

log() {
  if [ $verbose ]; then
    printf >&2 "$@"
  fi
}

# get user options
while [ $# -gt 0 ]; do
  # get options
  arg="$1"
  shift

  case "$arg" in
  -h) usage ;;
  --help) usage ;;
  -v) verbose=1 ;;
  --verbose) verbose=1 ;;
  --*)
    die "unrecognised option: '$arg'\n$usage" ;;
  *)
    if [ "$name" == "" ]; then
      name="$arg"
    else
      die "too many arguments"
    fi
    ;;
  esac
done


if [ "$name" == "" ]; then
  name=screencap.$(date +"%Y-%m-%dT%H:%M:%SZ").png
fi

log "capturing screen..."
img=$(screencap | ipfs add -q)
log " $img\n"


log "constructing dir..."
dir=$(ipfs object new unixfs-dir)
dir=$(ipfs object patch "$dir" add-link "$name" "$img" )
pin=$(ipfs pin add -r "$dir")
log " $dir\n"

log "copying url to clipboard... "
out="http://gateway.ipfs.io/ipfs/$dir/$name"
echo "$out" | pbcopy
log "copied\n"
echo "$out"