simple telegram sender bot

telegram_report.sh

#! /bin/bash

die() {
  echo "EDIT YOUR ~/telegram_bot.rc AND RE-RUN!" 1>&2
  exit 1
}

if [ ! -f $HOME/telegram_bot.rc ]; then
cat >$HOME/telegram_bot.rc <<_EOF_
#
# BOT_KEY='123456:enterYourTelegramBotAPIKeyHere'
#
BOT_KEY=''

#
# BOT_MASTER=your telegram id (ID! not your telephone!)
#
BOT_MASTER=

# REMOVE THIS LINE AND BELOW AFTER EDITING AND CHECKING
echo "YOU ARE LAZY! CHECK YOUR CONFIG!"
exit 1

_EOF_
  die
fi

source $HOME/telegram_bot.rc
[ "x$BOT_KEY" = "x" -o "x$BOT_MASTER" = "x" ] && die

rawurlencode() {
  # see
  # http://stackoverflow.com/questions/296536/how-to-urlencode-data-for-curl-command
  #
  local string="${*}"
  local strlen=${#string}
  local encoded=""

  for (( pos=0 ; pos<strlen ; pos++ )); do
     c=${string:$pos:1}
     case "$c" in
        [-_.~a-zA-Z0-9] ) o="${c}" ;;
        * )               printf -v o '%%%02x' "'$c"
     esac
     encoded+="${o}"
  done
  REPLY="${encoded}"   #+or echo the result (EASIER)... or both... :p
}

message() {
  rawurlencode "$@"
  wget "https://api.telegram.org/bot${BOT_KEY}/sendMessage?chat_id=${BOT_MASTER}&text=${REPLY}" -O /dev/null &>/dev/null
}

msg="
TIMESTAMP: $(date +'%Y-%m-%d %H:%M:%S')

HOSTNAME : $(hostname)

UNAME    : $(uname -a)

UPTIME   : $(uptime)

--- LAST LOG --- 

$(last)

--- DF --

$(df)

-- DONE --

"

message "$msg"