telegram.sh/tg.sh

#!/bin/bash
TELEGRAM_TOKEN=""
PARSE_MODE="MarkdownV2"

function _escape_text() {
	sed 's/[][`~!@#$%^&*():;<>.,?\|{}=+-]/\\&/g' <<< "$1"
}

# tg_send(chat, text, file, type)
function tg_send() {
	text="$(_escape_text "$2")"
	if [[ $3 != '' ]]; then
		local type_snake=$4
		[[ $4 == '' ]] && local type_snake='document'
		[[ $4 == '' || $4 == 'document' ]] && local type="Document"
		[[ $4 == 'photo' ]] && local type="Photo"
		[[ $4 == 'audio' ]] && local type="Audio"
		[[ $4 == 'video' ]] && local type="Video"
		[[ $4 == 'animation' ]] && local type="Animation"
		[[ $4 == 'voice' ]] && local type="Voice"
		[[ $4 == 'video_note' ]] && local type="VideoNote"
		
		curl -s \
			 -F chat_id=$1 \
			 -F caption="$text" \
			 -F parse_mode=$PARSE_MODE \
		 	 -F $type_snake=@$3 \
		 	 "https://api.telegram.org/bot${TELEGRAM_TOKEN}/send${type}"
	else
		curl -s \
			 -F chat_id=$1 \
			 -F text="$text" \
			 -F parse_mode=$PARSE_MODE \
			 "https://api.telegram.org/bot${TELEGRAM_TOKEN}/sendMessage"
	fi
}

# tg_get_me()
function tg_get_me() {
	curl -s "https://api.telegram.org/bot${TELEGRAM_TOKEN}/getMe"
}

# tg_get_messages(offset, timeout)
function _tg_get_updates() {
	curl -s "https://api.telegram.org/bot${TELEGRAM_TOKEN}/getUpdates?offset=$1&timeout=$2" | jq -c '.result[]'
}

function _on_msg() {	
	echo "[msg] ${event[from_username]}: ${event[text]}"
}

function _on_edit() {
	echo "[edit] ${event[json]}"
}

function _on_animation() {
	echo "[animation] ${event[json]}"
}

function _on_audio() {
	echo "[audio] ${event[json]}"
}

function _on_document() {
	echo "[document] ${event[json]}"
}

function _on_photo() {
	echo "[photo] ${event[json]}"
}

function _on_sticker() {
	echo "[sticker] ${event[json]}"
}

function _on_video() {
	echo "[video] ${event[json]}"
}

function _on_video_note() {
	echo "[video_note] ${event[json]}"
}

function _on_voice() {
	echo "[voice] ${event[json]}"
}

#jq_to_array(jq_expression)
function _jq_to_array() {
	declare -ga "_tmp=($(jq -r "$1" | sed 's/[][`~!@#$%^&*():;<>.,?\|{}=+-]/\\&/g;'"s@\\\'@\\'@g" ))"
}

function tg_start() {
	_offset=0
	while true; do
		IFS=$'\n'
		_events=($(_tg_get_updates $_offset 10))
		unset IFS
		
		for (( i=0; i<${#_events[@]}; i++ )); do
			declare -A event
			_msg_type="$(jq -r '(select(.message) | "message"), (select(.edited_message) | "edited_message")' <<< "${_events[$i]}")"
			_event_type="$(jq -r '(select(.message) | .message), (select(.edited_message) | .edited_message) | (
				(select(.animation) | "animation"),
				(select(.audio) | "audio"),
				(select(.document) | "document"),
				(select(.photo) | "photo"),
				(select(.sticker) | "sticker"),
				(select(.video) | "video"),
				(select(.video_note) | "video_note"),
				(select(.voice) | "voice"))' <<< "${_events[$i]}")"

			_jq_to_array '(select(.message) | .message), (select(.edited_message) | .edited_message) |
				[.message_id,
				.from.id,
				.from.is_bot,
				.from.first_name,
				.from.last_name,
				.from.username,
				.chat.id,
				(if .chat.type == "private" then .chat.username else .chat.title end),
				.chat.type,
				.date,
				.text,
				(if .reply_to_message then
					.reply_to_message | (
						"true",
						.message_id,
						.from.id,
						.from.is_bot,
						.from.first_name,
						.from.last_name,
						.from.username,
						.date,
						.text
					)
				else
					"false"
				end)]
				| @sh' <<< "${_events[$i]}"

			event[message_id]="${_tmp[0]}"
			event[from_id]="${_tmp[1]}"
			event[from_is_bot]="${_tmp[2]}"
			event[from_first_name]="${_tmp[3]}"
			event[from_last_name]="${_tmp[4]}"
			event[from_username]="${_tmp[5]}"
			event[chat_id]="${_tmp[6]}"
			event[chat_title]="${_tmp[7]}"
			event[chat_type]="${_tmp[8]}"
			event[date]="${_tmp[9]}"
			event[text]="${_tmp[10]}"

			if [[ "${_tmp[11]}" == "true" ]]; then
				event[reply]=true
				event[reply_message_id]="${_tmp[12]}"
				event[reply_from_id]="${_tmp[13]}"
				event[reply_from_is_bot]="${_tmp[14]}"
				event[reply_from_first_name]="${_tmp[15]}"
				event[reply_from_last_name]="${_tmp[16]}"
				event[reply_from_username]="${_tmp[17]}"
				event[reply_date]="${_tmp[18]}"
				event[reply_text]="${_tmp[19]}"
			else
				event[reply]=false
			fi
			
			event[type]="$_msg_type"
			event[json]="${_events[$i]}"
			if [[ "$_msg_type" == edited_message ]]; then
				_on_edit
			elif [[ "$_event_type" == animation ]]; then
				_on_animation
			elif [[ "$_event_type" == audio ]]; then
				_on_audio
			elif [[ "$_event_type" == document ]]; then
				_on_document
			elif [[ "$_event_type" == photo ]]; then
				_on_photo
			elif [[ "$_event_type" == sticker ]]; then
				_on_sticker
			elif [[ "$_event_type" == video ]]; then
				_on_video
			elif [[ "$_event_type" == video_note ]]; then
				_on_video_note
			elif [[ "$_event_type" == voice ]]; then
				_on_voice
			else			
				_on_msg 
			fi
			unset event
		done
		[[ ${#_events[@]} -gt 0 ]] && _update_id=$(jq 'select(.update_id != null) | .update_id' <<< "${_events[-1]}")
		[[ $_update_id != '' ]] && _offset=$((_update_id+1))
		echo $_offset
	done
}