send-ntfy

#!/bin/bash
set -e
# Help function
show_help() {
  cat <<EOF
Usage: $0 [OPTIONS] MESSAGE

Send a notification via ntfy.sh

Options:
  -c, --config FILE    Configuration file (default: ~/.ntfy or \$CONFIG)
  -s, --server URL     Ntfy server URL (default: first line of config or \$SERVER)
  -t, --topic TOPIC    Topic to publish to (default: second line of config or \$TOPIC)
  -k, --token TOKEN    Access token (default: last line of config or \$TOKEN)
  --tags TAGS          Tags for notification (comma-separated, default: computer or \$TAGS)
  --title TITLE        Notification title (default: Alert or \$TITLE)
  -p, --priority PRIO  Priority (1-5, default: 3 or \$PRIORITY)
  --delay DELAY        Delay delivery until specific time (timestamp)
  --actions ACTIONS    Notification actions (JSON format)
  -h, --help           Show this help message

Environment variables can be used instead of flags and take precedence.
EOF
  exit 0
}

# Parse command line arguments
while [[ $# -gt 0 ]]; do
  case "$1" in
  -c | --config)
    CONFIG="$2"
    shift 2
    ;;
  -s | --server)
    SERVER="$2"
    shift 2
    ;;
  -t | --topic)
    TOPIC="$2"
    shift 2
    ;;
  -k | --token)
    TOKEN="$2"
    shift 2
    ;;
  --tags)
    TAGS="$2"
    shift 2
    ;;
  --title)
    TITLE="$2"
    shift 2
    ;;
  -p | --priority)
    PRIORITY="$2"
    shift 2
    ;;
  --delay)
    DELAY="$2"
    shift 2
    ;;
  --actions)
    ACTIONS="$2"
    shift 2
    ;;
  -h | --help)
    show_help
    ;;
  *)
    # First non-option argument is treated as the message
    if [[ -z "$MESSAGE" ]]; then
      MESSAGE="$1"
      shift
    else
      echo "Error: Unknown option or too many arguments: $1" >&2
      exit 1
    fi
    ;;
  esac
done

# Default values
CONFIG=${CONFIG-$HOME/.ntfy}
SERVER=${SERVER-$(head -n1 "$CONFIG" 2>/dev/null || true)}
TOPIC=${TOPIC-$(head -n2 "$CONFIG" 2>/dev/null | tail -n1 || true)}
TOKEN=${TOKEN-$(tail -n1 "$CONFIG" 2>/dev/null || true)}
TAGS=${TAGS-computer}
TITLE=${TITLE-Alert}
PRIORITY=${PRIORITY-3}
DELAY=${DELAY-}
ACTIONS=${ACTIONS-}

send_ntfy() {
  local curl_args=(
    "-H" "Authorization: Bearer $TOKEN"
    "-H" "Tags: $TAGS"
    "-H" "Title: $TITLE"
    "-H" "X-Priority: $PRIORITY"
  )

  # Only add Delay header if DELAY is set
  [[ -n "$DELAY" ]] && curl_args+=("-H" "Delay: $DELAY")

  # Only add Actions header if ACTIONS is set
  [[ -n "$ACTIONS" ]] && curl_args+=("-H" "Actions: $ACTIONS")

  curl "${curl_args[@]}" -d "$@" "$SERVER/$TOPIC"
}

# If not sourced and no help requested, send notification
if [[ "${BASH_SOURCE[0]}" == "$0" ]] && [[ "$1" != "-h" && "$1" != "--help" ]]; then
  if [[ -z "$MESSAGE" ]]; then
    echo "Error: Message content is required" >&2
    show_help
    exit 1
  fi
  send_ntfy "$MESSAGE"
fi