#!/bin/bash

sendEmail() {
# sendEmail $to $from $pass $subject $host $port $message
	if [ $# -ne 7 ]; then
		echo -en "ERROR:\tError interno en sendEmail.\n"
		exit 1
	fi
	to=$1
	shift
	from=$1
	shift
	pass=$1
	shift
	subject=$1
	shift
	host=$1
	shift
	port=$1
	shift
	message=$@
	echo -en "$message" | mailx -Ssendwait -s "$subject" -S smtp-use-starttls -S smtp-auth=login -S smtp=smtp://$host:$port -S from="$from" -S smtp-auth-user="$from" -S smtp-auth-password="$pass" $to > /dev/null 2>&1
	return $?
	unset to from pass subject host port message
}

getVirtualHosts() {
# getVirtualHost $virtualHostPath
	if [ ! -d $1 ];then
		echo -en "ERROR:\tEl directorio \"$1\" no existe.\n"
		exit 1
	fi
	cont=1
	for virtualHost in $(find -L "$1" -type f);do
		grep ^[[:space:]]*auth_basic "$virtualHost" > /dev/null 2>&1
		if [ $? -eq 0 ];then
			# Si tiene la directiva "auth_basic" activada no lo comprobamos
			continue
		fi
		linea=$(grep ^[[:space:]]*server_name "$virtualHost")
		if [ $? -ne 0 ];then
			# Si no tiene la directiva "server_name" no lo comprobamos
			continue
		fi
		for hostname in $linea;do
			hostname=$(echo "$hostname" | sed 's/;//g')
			if [ $hostname != "server_name" ] && [ $hostname != "localhost" ];then
				hostnames[$cont]=$hostname
				cont=$((cont+1))
			fi
		done
	done
	# Eliminar repetidos
	hostnames=($(echo "${hostnames[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
	unset linea cont hostname
}

checkHostname() {
# checkHostname $domain
	if [ $# -ne 1 ];then
		echo -en "ERROR:\tError interno en checkHostname.\n"
		exit 1
	fi
	domain=$1
	httpCode=$(curl -L -s -o /dev/null -w "%{http_code}" "$domain")
	case $httpCode in
		2[0-9][0-9])
			# Sitio Disponible
			return 0
			;;
		*)
			# Se ha producido algún error
			return 1
			;;
	esac
}

# Variables iniciales
hostnames=""
hostnamesFail=""

echo -en $(date +'[%Y-%m-%d] %H:%M:%S')" Comprobando Virtual Hosts...\n"
getVirtualHosts "/etc/nginx/sites-enabled/"
for hostname in $hostnames;do
	checkHostname $hostname
	if [ $? -ne 0 ];then
		# Este dominio no está disponible
		echo -en "* \"$hostname\"\t\tNO ESTÁ DISPONIBLE.\n"
		hostnamesFail=$hostnameFail"* ""$hostname"" NO ESTÁ DISPONIBLE.\n"
	else
		echo -en "* \"$hostname\"\t\t ESTÁ DISPONIBLE.\n"
	fi
done

if [ ! -z $hostnamesFail ];then
	echo -en "Enviando informe por email a \$TO..."
	#sendEmail
fi