<?php

function processPostData($db, $post, $redirectLocation = "."){
	if($post['action']){
		if($post['action'] == "giveAttendance"){
			giveJudokasAttendence($db, $post['attandanceDate'], $post['judokaIdsInTraining']);
		}
		if($post['action'] == "updateCoronaData"){
			updateCoronaData($db, $post['userId'], $post['columnName'], $post['columnValue']);
		}
		if($post['action'] == "addCoronaUser"){
			if(
				array_keys_exist(
					$post, 
					['name', 'vorname', 'corona_PLZ', 'corona_telephon', 'corona_eMail']
				)
				&& isValid($post['corona_PLZ'], "plz")
				&& isValid($post['corona_telephon'], "phonenumber")
				&& isValid($post['corona_eMail'], "email")
				){
				addCoronaUser(
					$db,
					$post['name'], 
					$post['vorname'], 
					$post['corona_PLZ'],
					$post['corona_telephon'],
					$post['corona_eMail']
				);
				$redirectLocation .= "?addCoronaUserSuccess=true";
			}
			else{
				$redirectLocation .= "?addCoronaUserSuccess=false";
			}
			$redirectLocation .= "#addCoronaUser";
		}
		if($post['action'] == "sendAttandeesPerEmail"){
			sendEmail(
				$post['toEmail'], 
				$post['emailText']
			);
		}
	header("Location: ".$redirectLocation);
	}
return;
}

function sendEmail($toEmail, $emailText){
	try{
		$date=new DateTime();
		mail(
			$toEmail,
			"Kontakliste CWSV-Judo vom ".$date->format("Y-m-d"),
			$emailText
		);
	}
	catch(Exception $e) {
	  echo 'Message: ' .$e->getMessage();
	}
}

function attendancesAssocArray2text($attendancesAssocArray){
	$ret = "";
	foreach($attendancesAssocArray as $date => $attendees){
		$ret .= $date."\n";
		foreach($attendees as $a){
			$ret .= "\n";
			$ret .= "Name: ".$a['name'].", ".$a['vorname']."\n";
			$ret .= "PLZ: ".$a['corona_PLZ']."\n";
			$ret .= "Tel.: ".$a['corona_telephon']."\n";
			$ret .= "eMail: ".$a['corona_eMail']."\n";
		}
		$ret .= "\n";
	}
return $ret;
}

function attendancesAssocArray2mdList($attendancesAssocArray, $date=null){
	if($date == null)
		$date=new DateTime();
	$ret = "# Anwesenheitsliste zur Corona-Kontaktverfolgung der Abteilung Judo des CWSV vom ".$date->format("Y-m-d")."\n\n";
	foreach($attendancesAssocArray as $d => $attendees){
		$ret .= "## ".$d."\n";
		$i=0;
		foreach($attendees as $a){
			$i += 1;
			$ret .= "\n";
			$ret .= $i." ".$a['name'].", ".$a['vorname']."\n";
			$ret .= "    - PLZ: ".$a['corona_PLZ']."\n";
			$ret .= "    - Tel.: ".$a['corona_telephon']."\n";
			$ret .= "    - eMail: ".$a['corona_eMail']."\n";
		}
		$ret .= "\n";
	}
return $ret;
}

/// Validaing a phone number
/// true if it validates, false if not
function validate_phone_number($phone)
{
	 // Allow +, - and . in phone number
	 $filtered_phone_number = filter_var($phone, FILTER_SANITIZE_NUMBER_INT);
	 // Remove "-" from number
	 $phone_to_check = str_replace("-", "", $filtered_phone_number);
	 // Check the lenght of number
	 // This can be customized if you want phone number from a specific country
	 if (strlen($phone_to_check) < 10 || strlen($phone_to_check) > 14) {
		return false;
	 } else {
	   return true;
	 }
}

/// validate different types of input
function isValid($toValidate, $type){
	// for now we disable the name validation: what do i know how people can be called!
	// $regexName="/^[A-Z][a-zA-Z]*$/";
	$regexPlz ="/^[0-9]{5}$/";
	switch( $type ){
		case "plz":
			return preg_match($regexPlz, $toValidate) > 0;
		case "phonenumber": 
			return validate_phone_number($toValidate);
		case "email": 
			return filter_var($toValidate, FILTER_VALIDATE_EMAIL);
		default:
			return false;
		}
	return false;
}

//! Checks if multiple keys exist in an array
//!
//! @param array $array array to check for key
//! @param array|string $keys keys to check for
//!
//! @return bool true, if *all* keys are set in the array
function array_keys_exist( array $array, $keys ) {
    if ( ! is_array( $keys ) ) {
        $keys = func_get_args();
        array_shift( $keys );
    }
    $count = 0;
    foreach ( $keys as $key ) {
        if ( isset( $array[$key] ) || array_key_exists( $key, $array ) ) {
            $count++;
        }
    }

    return count( $keys ) === $count;
}
?>