// ReSharper disable NotResolvedInText
/// <summary>
/// Validates that the topic does not exceed the maximum length.
/// </summary>
/// <param name="topicInstance">The instance to check.</param>
protected static void ValidateMaxLength(Topic topicInstance) {
if (topicInstance.RawTopic.Length > MaxTopicLength) {
throw new ArgumentException(
String.Format("The length of the supplied rawTopic ({0}) is longer than the maximum allowable ({1})",
topicInstance.RawTopic.Length, MaxTopicLength),
"topic");
}
}
/// <summary>
/// Validates the placement of the multi-wildcard character in subscription topics.
/// </summary>
/// <param name="topicInstance">The instance to check.</param>
private static void ValidateMultiWildcard(Topic topicInstance) {
if (topicInstance.RawTopic.Contains(MultiWildcard) && !topicInstance.RawTopic.EndsWith(MultiWildcard)) {
throw new ArgumentException("The rawTopic wildcard # can only be present at the end of a topic", "topic");
}
if (topicInstance.RawTopic.Length > 1 && topicInstance.RawTopic.EndsWith(MultiWildcard) &&
!topicInstance.RawTopic.EndsWith(MultiWildcardValidEnd)) {
throw new ArgumentException(
"Topics using the # wildcard longer than 1 character must be immediately preceeded by a the rawTopic separator /.", "topic");
}
}
/// <summary>
/// Validates all unqiue fragments in the topic match the MQTT spec requirements.
/// </summary>
// ReSharper disable NotResolvedInText
private static void ValidateFragments(Topic topicInstance) {
// if any fragment contains a wildcard or a multi wildcard but is greater than
// 1 character long, then it's an error - wildcards must appear by themselves.
var invalidFragment = topicInstance.TopicFragments.FirstOrDefault(
fragment => (fragment.Contains(MultiWildcard) || fragment.Contains(Wildcard)) && fragment.Length > 1);
if (invalidFragment != null) {
throw new ArgumentException(
String.Format("rawTopic Fragment '{0}' contains a wildcard but is more than one character long.", invalidFragment),
"topic");
}
}
/// <summary>
/// Validates that the topic does not fall below the minimum length.
/// </summary>
/// <param name="topicInstance">The instance to check.</param>
protected static void ValidateMinLength(Topic topicInstance) {
if (String.IsNullOrWhiteSpace(topicInstance.RawTopic)) {
throw new ArgumentException("rawTopic must contain at least one character.", "topic");
}
}
/// <summary>
/// Validates that the topic has no wildcards which are not allowed in publication topics.
/// </summary>
/// <param name="topicInstance">The instance to check.</param>
private static void ValidateWildcards(Topic topicInstance) {
if (topicInstance.HasWildcards) {
throw new ArgumentException("Cannot publish to a topic that contains MQTT topic wildcards (# or +)");
}
}
