/// <summary>
/// Sets up a listener on the defined channelId types (see <paramref name="hubs"/>) that the bot is a member of. The <paramref name="handler"/>
/// is executed when an incoming message matches the given <paramref name="match"/>.
/// Messages in <see cref="HubType.Channel"/> and <see cref="HubType.Group"/> are expected to
/// contain the name of the bot before the handler will fire.
/// </summary>
/// <param name="match">Defines when to execute this handler</param>
/// <param name="hubs">The Slack channels to listen on</param>
/// <param name="modes">Configuration options</param>
/// <param name="handler">Function to be run when a message matches</param>
/// <returns></returns>
public IWhenHandler When(MessageMatcher match, HubType hubs, Modes modes, Func <IConversation, Task> handler)
{
bool MessageAddressesBot(Message msg) =>
(modes & Modes.ObserveAllMessages) == Modes.ObserveAllMessages ||
msg.Text.Contains(this.state.BotUserId, StringComparison.OrdinalIgnoreCase) ||
msg.Text.Contains(this.state.BotUsername, StringComparison.OrdinalIgnoreCase);
var whenHandler = new WhenHandler(this,
msg =>
{
if (msg.User != null && msg.User.Equals(this.state.BotUserId))
{
return(MessageMatcher.NoMatch);
}
var messageHubType = this.state.GetHubById(msg.Channel).HubType;
if ((hubs & messageHubType) != messageHubType)
{
return(MessageMatcher.NoMatch);
}
if (messageHubType != HubType.DirectMessage)
{
if (!MessageAddressesBot(msg))
{
return(MessageMatcher.NoMatch);
}
}
match.SetupLogger(this.config.LoggerFactory);
return(match.GetMatches(msg));
},
async(msg, matches) =>
{
var modesCopy = modes;
// Conversation being initiated from another thread? force threaded mode
if (msg.RawThreadTimestamp != null)
{
modesCopy |= Modes.StartThread;
}
using (var conversation = new Conversation(this, modesCopy, msg, matches))
{
try
{
await handler(conversation);
return(true, null);
}
catch (Exception ex)
{
return(false, ex);
}
}
});
this.whenHandlers.Enqueue(whenHandler);
return(whenHandler);
}
private async Task <(bool success, Match[] matches)> MessageMatches(Message msg, MessageMatcher matcher)
{
if (matcher == null)
{
return(true, null);
}
var matches = await matcher.GetMatches(msg);
bool success = matches != null && matches.Sum(m => m.Score) >= 0;
if (!success)
{
return(false, null);
}
return(true, matches);
}