only one account per fcm_token

web/index_more.php

@@ -100,6 +100,10 @@
                     <td data-label="Statuscode">403 (Forbidden)</td>
                     <td data-label="Explanation">The user has exceeded its daily quota - wait 24 hours or upgrade your account</td>
                 </tr>
+                <tr>
+                    <td data-label="Statuscode">412 (Precondition Failed)</td>
+                    <td data-label="Explanation">There is no device connected with this account - open the app and press the refresh button in the account tab</td>
+                </tr>
                 <tr>
                     <td data-label="Statuscode">500 (Internal Server Error)</td>
                     <td data-label="Explanation">There was an internal error while sending your data - try again later</td>

web/info.php

@@ -15,7 +15,7 @@ $user_key  = $INPUT['user_key'];
 
 $pdo = getDatabase();
 
-$stmt = $pdo->prepare('SELECT user_id, user_key, quota_today, is_pro, quota_day FROM users WHERE user_id = :uid LIMIT 1');
+$stmt = $pdo->prepare('SELECT user_id, user_key, quota_today, is_pro, quota_day, fcm_token FROM users WHERE user_id = :uid LIMIT 1');
 $stmt->execute(['uid' => $user_id]);
 
 $datas = $stmt->fetchAll(PDO::FETCH_ASSOC);
@@ -33,11 +33,12 @@ if ($data['quota_day'] === null || $data['quota_day'] !== date("Y-m-d")) $quota=
 
 echo json_encode(
 [
-	'success'   => true,
-	'user_id'   => $user_id,
-	'quota'     => $quota,
-	'quota_max' => Statics::quota_max($is_pro),
-	'is_pro'    => $is_pro,
-	'message'   => 'ok'
+	'success'        => true,
+	'user_id'        => $user_id,
+	'quota'          => $quota,
+	'quota_max'      => Statics::quota_max($is_pro),
+	'is_pro'         => $is_pro,
+	'fcm_token_set'  => ($data['fcm_token'] != null),
+	'message'        => 'ok'
 ]);
 return 0;

web/send.php

@@ -54,6 +54,11 @@ try
 	if ($data['quota_day'] === null || $data['quota_day'] !== date("Y-m-d")) $new_quota=1;
 	if ($new_quota > Statics::quota_max($data['is_pro'])) api_return(403, json_encode(['success' => false, 'error' => 2101, 'errhighlight' => -1, 'message' => 'Daily quota reached ('.Statics::quota_max($data['is_pro']).')']));
 
+	if ($fcm == null || $fcm == '' ||  $fcm == false)
+	{
+		api_return(412, json_encode(['success' => false, 'error' => 1401, 'errhighlight' => -1, 'message' => 'No device linked with this account']));
+	}
+
 //------------------------------------------------------------------
 
 	if ($usrmsgid != null)

web/update.php

@@ -34,6 +34,8 @@ $new_userkey = generateRandomAuthKey();
 
 if ($fcm_token === null)
 {
+	// only gen new user_secret
+
 	$stmt = $pdo->prepare('UPDATE users SET timestamp_accessed=NOW(), user_key=:at WHERE user_id = :uid');
 	$stmt->execute(['uid' => $user_id, 'at' => $new_userkey]);
 
@@ -51,9 +53,14 @@ if ($fcm_token === null)
 }
 else
 {
+	// update fcm and gen new user_secret
+
 	$stmt = $pdo->prepare('UPDATE users SET timestamp_accessed=NOW(), fcm_token=:ft, user_key=:at WHERE user_id = :uid');
 	$stmt->execute(['uid' => $user_id, 'ft' => $fcm_token, 'at' => $new_userkey]);
 
+	$stmt = $pdo->prepare('UPDATE users SET fcm_token=NULL WHERE user_id <> :uid AND fcm_token=:ft');
+	$stmt->execute(['uid' => $user_id, 'ft' => $fcm_token]);
+
 	echo json_encode(
 	[
 		'success' => true,