public bool TryHandleReferencedMessage(IMessage referencedMessage, string?fileName, [NotNullWhen(true)] out SprayModuleParseResult?result)
{
if (referencedMessage is null)
{
throw new ArgumentNullException(nameof(referencedMessage));
}
if (!string.IsNullOrEmpty(referencedMessage.Content) &&
Uri.TryCreate(referencedMessage.Content, UriKind.Absolute, out var uri) &&
uri != null)
{
if (referencedMessage.Content.StartsWithHttpProtocol())
{
result = new SprayModuleParseResult(uri, fileName);
return(true);
}
result = null;
return(false);
}
if (referencedMessage.Attachments.Any() &&
Uri.TryCreate(referencedMessage.Attachments.First().ProxyUrl, UriKind.Absolute, out uri) &&
uri != null)
{
result = new SprayModuleParseResult(uri, fileName);
return(true);
}
result = null;
return(false);
}
public bool TryResolve(string?arg1, string?arg2, IUserMessage message, [NotNullWhen(true)] out SprayModuleParseResult?result)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
var referencedMessage = message.ReferencedMessage;
// Supported scenarios:
// 1. Message content starts with a URL.
// 2. Message content starts with a filename and URL.
// 3. Message content starts with a filename and has an attachment.
// 4. Message content starts with a filename and is a reply to a message with only a URL as its content.
// 5. Message content starts with a filename and is a reply to a message with an attachement.
// 6. Message content is empty and has an attachment.
// 7. Message content is empty and is a reply to a message with only a URL as its content.
// 8. Message content is empty and is a reply to a message with an attachment.
if (!string.IsNullOrEmpty(arg1))
{
// Case 1. Message content starts with a URL.
if (Uri.TryCreate(arg1, UriKind.Absolute, out var uri) &&
uri != null)
{
if (arg1.StartsWithHttpProtocol())
{
result = new SprayModuleParseResult(uri);
return(true);
}
result = null;
return(false);
}
else
{
var fileName = arg1;
// Case 2. Message content starts with a filename and URL.
if (!string.IsNullOrEmpty(arg2) &&
Uri.TryCreate(arg2, UriKind.Absolute, out uri) &&
uri != null)
{
if (arg2.StartsWithHttpProtocol())
{
result = new SprayModuleParseResult(uri, fileName);
return(true);
}
result = null;
return(false);
}
// Case 3. Message content starts with a filename and attachment.
if (message.Attachments.Any() &&
Uri.TryCreate(message.Attachments.First().ProxyUrl, UriKind.Absolute, out uri) &&
uri != null)
{
result = new SprayModuleParseResult(uri, fileName);
return(true);
}
// 4. Message content starts with a filename and is a reply to a message with only a URL as its content.
// 5. Message content starts with a filename and is a reply to a message with an attachement.
if (referencedMessage != null)
{
return(TryHandleReferencedMessage(referencedMessage, fileName, out result));
}
}
}
else
{
// 6. Message content is empty and has an attachment.
if (message.Attachments.Any() &&
Uri.TryCreate(message.Attachments.First().ProxyUrl, UriKind.Absolute, out var uri) &&
uri != null)
{
result = new SprayModuleParseResult(uri, null);
return(true);
}
// 7. Message content is empty and is a reply to a message with only a URL as its content.
// 8. Message content is empty and is a reply to a message with an attachment.
if (referencedMessage != null)
{
return(TryHandleReferencedMessage(referencedMessage, null, out result));
}
}
result = null;
return(false);
}