#!/bin/sh
# swx: share files and text from the terminal via swx.sh
#
# install (read this file first, always):
#   curl -o swx https://swx.sh/cli && less swx && chmod +x swx && mv swx ~/bin/
#
# usage:
#   swx put <file> [-e minutes, 1 to 60] [-p password] [-b] [-d tries] [-w url]
#   swx text "some text" [same flags]
#   swx get <id-or-url> [-p password] [-o outfile]
#   swx del <id> [delete-token]
#
# env:
#   SWX_TOKEN  upload token (required for put/text, and for del without a token)
#   SWX_URL    base url, defaults to https://swx.sh

set -eu

BASE="${SWX_URL:-https://swx.sh}"

die() { printf '%s\n' "$1" >&2; exit 1; }
command -v curl >/dev/null 2>&1 || die "swx needs curl"

cmd="${1:-help}"
[ $# -gt 0 ] && shift

EXPIRY="" PW="" BURN="" DESTROY="" WEBHOOK="" OUT=""
collect_flags() {
  while [ $# -gt 0 ]; do
    case "$1" in
      -e) EXPIRY="$2"; shift 2 ;;
      -p) PW="$2"; shift 2 ;;
      -b) BURN=1; shift ;;
      -d) DESTROY="$2"; shift 2 ;;
      -w) WEBHOOK="$2"; shift 2 ;;
      -o) OUT="$2"; shift 2 ;;
      *) die "unknown flag: $1" ;;
    esac
  done
}

do_upload() {
  # $1 = filename, stdin = bytes
  [ -n "${SWX_TOKEN:-}" ] || die "set SWX_TOKEN to upload"
  set -- -H "authorization: Bearer $SWX_TOKEN" -H "x-filename: $1"
  [ -n "$EXPIRY" ] && set -- "$@" -H "x-expiry: $EXPIRY"
  [ -n "$PW" ] && set -- "$@" -H "x-password: $PW"
  [ -n "$BURN" ] && set -- "$@" -H "x-burn: 1"
  [ -n "$DESTROY" ] && set -- "$@" -H "x-destroy-after-fails: $DESTROY"
  [ -n "$WEBHOOK" ] && set -- "$@" -H "x-webhook-url: $WEBHOOK"
  curl -sS "$@" --data-binary @- "$BASE/api/up"
}

case "$cmd" in
  put)
    [ $# -ge 1 ] || die "usage: swx put <file> [flags]"
    FILE="$1"; shift
    [ -f "$FILE" ] || die "no such file: $FILE"
    collect_flags "$@"
    do_upload "$(basename "$FILE")" < "$FILE"
    ;;
  text)
    [ $# -ge 1 ] || die 'usage: swx text "something" [flags]'
    TEXT="$1"; shift
    collect_flags "$@"
    printf '%s' "$TEXT" | do_upload "paste.txt"
    ;;
  get)
    [ $# -ge 1 ] || die "usage: swx get <id-or-url> [-p password] [-o outfile]"
    TARGET="$1"; shift
    collect_flags "$@"
    case "$TARGET" in
      http*) URL="$TARGET" ;;
      *) URL="$BASE/f/$TARGET" ;;
    esac
    set -- -sS -f
    [ -n "$PW" ] && set -- "$@" -H "x-pw: $PW"
    if [ -n "$OUT" ]; then
      curl "$@" -o "$OUT" "$URL" && printf 'saved %s\n' "$OUT"
    else
      curl "$@" -OJ "$URL"
    fi
    ;;
  del)
    [ $# -ge 1 ] || die "usage: swx del <id> [delete-token]"
    ID="$1"; TOKEN="${2:-}"
    set -- -sS -X DELETE
    if [ -n "$TOKEN" ]; then
      set -- "$@" -H "x-delete-token: $TOKEN"
    else
      [ -n "${SWX_TOKEN:-}" ] || die "pass the delete token or set SWX_TOKEN"
      set -- "$@" -H "authorization: Bearer $SWX_TOKEN"
    fi
    curl "$@" "$BASE/api/v1/shares/$ID"
    printf '\n'
    ;;
  help|*)
    sed -n '2,19p' "$0" | sed 's/^# \{0,1\}//'
    ;;
esac