#!/bin/bash

################################################################################
#
# Marcin Wozniak
# Last edit: 2023-05-05
#
# shellcheck disable=1091
################################################################################

set -u
set -e

# Colours
RED='\033[0;31m'
GREEN='\033[0;0;32m'
NC='\033[0m'

ADDR=$1
LOG_FILE="pinger-$ADDR-$(date -I).log"

function timestamp() {
    echo -e "${GREEN}[+]${NC} $(date +'%F %T') [INFO] $*"
}

function err() {
    echo -e "${RED}[-] $(date +'%F %T') [ERROR] $*${NC}" >&2
}

function command_start() {
    timestamp "Command $* has been started."
    if ! "$@"; then
        err "Command $* went wrong."
        # sendmailerr
        exit 0
    fi
    timestamp "Command $* has been ended."
}

function pinger() {
    ping "$ADDR" | while read pong; do timestamp "$pong"; done
}

function main() {
    command_start pinger
}

main | tee "$LOG_FILE"