Network.Pusher.WebSockets.Event

Functions for creating event handlers and triggering events.

Documentation

eventType :: Value -> Text

Get the value of the "event" field.

If not present (which should never happen!), returns the empty string.

eventChannel :: Value -> Maybe Channel

Get the value of the "channel" field.

This will be Nothing if the event was broadcast to all clients, with no channel restriction.

Event Handlers

data Binding

Event binding handle: a witness that we bound an event handler, and is used to unbind it.

If this is used after unbinding, nothing will happen.

Instances

Eq Binding

Ord Binding

Show Binding

NFData Binding

Hashable Binding

bind

Arguments

:: Text

Event name.

-> Maybe Channel

Channel name: If Nothing, all events of that name are handled.

-> (Value -> PusherClient ())

Event handler.

-> PusherClient Binding

Bind an event handler to an event type, optionally restricted to a channel.

Attempts to decode the "data" field of the event as stringified JSON; if that fails, it is left as a string.

If multiple handlers match a received event, all will be executed. The order is unspecified, and may not be consistent.

bindAll :: Maybe Channel -> (Value -> PusherClient ()) -> PusherClient Binding

Variant of bind which binds to all events in the given channel; or all events if no channel.

unbind :: Binding -> PusherClient ()

Remove a binding

Client Events

triggerEvent :: Text -> Maybe Channel -> Value -> PusherClient ()

Send an event with some JSON data. This does not trigger local event handlers.

localEvent :: Text -> Maybe Channel -> Value -> PusherClient ()

Trigger local event handlers, but do not send the event over the network.