NarKampen/dbFiles/FCMMessageing.php

<?php
/* FCM - Messageing */
	require_once '../vendor/autoload.php';

	putenv('GOOGLE_APPLICATION_CREDENTIALS=/home/axel/configs/narkampen-firebase-adminsdk-k42j5-d3d0354e37.json');

	$client = new Google_Client();
	$client->useApplicationDefaultCredentials();
	$client->addScope('https://www.googleapis.com/auth/firebase.messaging');
	$httpClient = $client->authorize();

	$hostname = 'localhost';
	$username = 'narKampen';
	$pass = 'IfRLzj2HJBXA9eei';
	$database = 'narKampen';
	
	$conn = new mysqli($hostname, $username, $pass, $database);
	if (!$conn) {
		die("Connection Failed. ". mysqli_connect_error());
	}
	mysqli_set_charset($conn,'utf8');
	
	$messageType = $conn->real_escape_string(isset($_POST['type'])?$_POST['type']:"");
	
	$title = $conn->real_escape_string($_POST['title']);
	$messageToSend = $conn->real_escape_string($_POST['message']);
	$gameId = $conn->real_escape_string($_POST['gameId']);
	
	if ($messageType === "FCMNextPlayer") {
		$playerName = $conn->real_escape_string($_POST['playerName']);
		$token = getToken();
		
		if ($token != null && $token != "") {
			sendMessage($token);
		}
	} else if ($messageType === "InviteMessage") {
		$i = 0;
		while ($_POST['player' . $i] != null) {
			$token = getToken($gameId, $conn->real_escape_string($_POST['player' . $i]));
			sendMessage($token);
		}

	}
	
	function getToken($gameId, $playerName) {
		$sql = "SELECT messageToken FROM `gamePlayers` INNER JOIN users ON users.id = playerId WHERE gameId = $gameId and users.username = '$playerName'";

		$result = $conn->query($sql);
		if ($result->num_rows == 1) {
			$returnArray = array();
			$data = $result->fetch_assoc();
			$token = $data['messageToken'];
		} else {
			echo "No games found for user";
		}
		
		return $token;
	}
	
	function sendMessage($token) {
		// Your Firebase project ID
		$project = "narkampen";
		// Creates a notification for subscribers to the debug topic
		$message = [
			"message" => [
				"token" => $token,
				"notification" => [
					"body" => $messageToSend,
					"title" => $title,
				]
			]
		];
		// Send the Push Notification - use $response to inspect success or errors
		$response = $httpClient->post("https://fcm.googleapis.com/v1/projects/{$project}/messages:send", ['json' => $message]);
	}