powerPing

function setup(){ # Load a few initial variables and call the main function.
    $loop = 'true'
    $runPath = 'c:\scripts' # read-host "Where is powerPing located? [type the directory path]"
    $failures = @()
    $content = (GET-CONTENT $runPath\hosts.txt)
    $upperBound = $content.getUpperBound(0)
    $it = [int]"-1"
    # Loads the config options as variables to be used later.
    $smtpServer = (get-content $runPath\config.txt)[0]
    $alertSubject = (get-content $runPath\config.txt)[1]
    $alertSubject2 = $alertSubject
    $alertBody = (get-content $runPath\config.txt)[2]
    $alertRecipient = (get-content $runPath\config.txt)[3]
    $alertSender = (get-content $runPath\config.txt)[4]
    main
}
function main(){
    clear
    while($loop) {
    $it = [int]$it + [int]1
    $iteration = $it + 1
    write-host "Iteration $iteration"
    $selHost = (GET-CONTENT $runPath\hosts.txt)[$it] # Grabs the line number $it from hosts.txt and wraps it in $selHost.
    write-host "Connecting to: $selHost"
    $alive = test-connection $selHost -count 2 -delay 1 -quiet
    start-sleep -s 1

    function sendAlert(){ # Sends email alert using variables defined in config.txt and restarts the looping process.
        write-host "ERMAHGERD! ALERTTTT!"
        #send-mailmessage -to "$alertRecipient" -from "$alertSender" -subject "$alertSubject2" -body "$alertBody" -smtpServer "$smtpServer"
    }

    function failTesting(){ # Tests the failed host three more times and then adds it to $failures and calls sendAlert if it doesn't pass.
        clear
        for($i = 0; $i -lt 3; $i++){
            write-host "Connecting to: $selHost"
            $alive = test-connection $selHost -count 2 -delay 1 -quiet
            if($alive){
                write-host "The connection to $selHost has succeded!"
                $alert = 'false'
                main
            }
            elseif($alive = 'False'){
                write-host "The connection to $selHost has failed!"
                $alert = 'true'
            }
        }
        if($alert){
            start-sleep -s 1
            write-host "The connection to $selhost failed too many times."
            write-host "Adding $selHost to list of failures."
            $failures += ,$selhost
            write-host "Failures: $failures"
            sendAlert
        }
    }

    if($alive){ # What to do if the test-connection returns "true".
        if($failures -contains $selhost){
            $temp = @()
            foreach($computer in $failures){ # Removes $selhost from $failures if it was added previously, but has come back online.
                if($computer -ne $selhost){
                    $temp += $computer
                }
            }
            $failures = $temp

            write-host "The connection to $selHost has succeded!"
            start-sleep -s 1
        }
        elseif($failures -notcontains $selhost){
            write-host "The connection to $selHost has succeded!"
            start-sleep -s 1
        }
    }
    elseif($alive = 'False'){ # What to do if the test-connection returns "false".
            write-host "The connection to $selHost has failed!"
        if($failures -notcontains $selhost){
            write-host "Trying three more times..."
            start-sleep -s 3
            failTesting
        }
        elseif($failures -contains $selhost){
            start-sleep -s 1
        }
    }

    if([int]$it -ge [int]$upperBound){ # This code restarts the loop at the first hostname
        $it = [int]"-1"
        clear
    }
    #End of loop
    }
}
setup