#!/bin/bash

#
## Variables
#

# Testsites should return HTTP-Code "204" 
testsite1=https://datenkastl.de/.connectivity-check
testsite2=http://captiveportal.kuketz.de

# Testdomains for ping
testdomain1=datenkastl.de
testdomain2=metager.de

#Path of curl and ping
curlbin=`type -tp curl`
pingbin=`type -tp ping`

#
## Functions
#

# Check connetction with curl
testwithcurl() {
	echo "Testing with curl..."

	status=$(curl --write-out "%{http_code}\n" "$testsite1" --output output.txt --silent)
	if [[ "$status" = "204" ]]; then
		echo "The connection is up!"
	
	else

		status2=$(curl --write-out "%{http_code}\n" "$testsite2" --output output.txt --silent)
		if [[ "$status2" = "204" ]]; then		
			echo "The network is up, but $testsite1 is down."
	
		else
			echo "The network is down."
		fi
	fi
}

#Check connection with ping
testwithping() {
	echo "Testing with ping..."
	if ping -q -c 1 -W 1 $testdomain1 >/dev/null; then
		echo "The connection is up."
	
	elif ping -q -c 1 -W 1 $testdomain2 >/dev/null; then
		echo "The network is up, but $testdomain1 is down."

	else
		echo "The network is down."

	fi
}

#
## Main
#

# Check for curl and ping and check network

if [[ -x ${curlbin} ]]; then
	testwithcurl

elif [[ -x ${pingbin} ]]; then
	testwithping

else
	echo "Can't find curl or ping. Please install one of them."
	exit 1
fi