100 lines
2.3 KiB
Bash
Executable File
100 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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DEFAULT_API_BASE_URL="https://api.telegram.org"
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DEFAULT_PARSE_MODE="HTML"
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MAX_MESSAGE_LENGTH=4096
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BOT_TOKEN=${TELEGRAM_BOT_TOKEN:-}
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CHAT_ID=${TELEGRAM_CHAT_ID:-}
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API_BASE_URL=${TELEGRAM_API_BASE_URL:-$DEFAULT_API_BASE_URL}
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PARSE_MODE=${TELEGRAM_PARSE_MODE:-$DEFAULT_PARSE_MODE}
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MESSAGE=""
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MESSAGE_FILE=""
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usage() {
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cat <<'EOF'
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Usage:
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notify-telegram.sh --message <text> [--bot-token <token>] [--chat-id <id>] [--api-base-url <url>]
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notify-telegram.sh --message-file <path> [--bot-token <token>] [--chat-id <id>] [--api-base-url <url>]
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Environment fallbacks:
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TELEGRAM_BOT_TOKEN
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TELEGRAM_CHAT_ID
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TELEGRAM_API_BASE_URL
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TELEGRAM_PARSE_MODE
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EOF
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}
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fail_usage() {
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echo "Error: $*" >&2
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usage >&2
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exit 2
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}
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parse_args() {
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--bot-token)
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BOT_TOKEN=${2:-}
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shift 2
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;;
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--chat-id)
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CHAT_ID=${2:-}
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shift 2
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;;
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--api-base-url)
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API_BASE_URL=${2:-}
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shift 2
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;;
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--message)
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MESSAGE=${2:-}
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shift 2
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;;
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--message-file)
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MESSAGE_FILE=${2:-}
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shift 2
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;;
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--help|-h)
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usage
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exit 0
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;;
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*)
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fail_usage "unknown argument: $1"
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;;
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esac
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done
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if [[ -n "$MESSAGE" && -n "$MESSAGE_FILE" ]]; then
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fail_usage "use either --message or --message-file, not both"
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fi
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if [[ -n "$MESSAGE_FILE" ]]; then
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[[ -r "$MESSAGE_FILE" ]] || fail_usage "message file is not readable: $MESSAGE_FILE"
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MESSAGE=$(<"$MESSAGE_FILE")
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fi
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[[ -n "$MESSAGE" ]] || fail_usage "message is required"
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[[ -n "$BOT_TOKEN" ]] || fail_usage "bot token is required (use --bot-token or TELEGRAM_BOT_TOKEN)"
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[[ -n "$CHAT_ID" ]] || fail_usage "chat id is required (use --chat-id or TELEGRAM_CHAT_ID)"
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command -v curl >/dev/null 2>&1 || fail_usage "curl is required"
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if [[ ${#MESSAGE} -gt "$MAX_MESSAGE_LENGTH" ]]; then
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MESSAGE=${MESSAGE:0:$MAX_MESSAGE_LENGTH}
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fi
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}
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main() {
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parse_args "$@"
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curl -fsS -X POST \
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"${API_BASE_URL%/}/bot${BOT_TOKEN}/sendMessage" \
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--data-urlencode "chat_id=${CHAT_ID}" \
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--data-urlencode "text=${MESSAGE}" \
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--data-urlencode "parse_mode=${PARSE_MODE}" \
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--data-urlencode "disable_web_page_preview=true" \
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>/dev/null
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}
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main "$@"
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