44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
package server
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import "time"
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// List of possible events
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const (
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openEvent = "open"
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keepaliveEvent = "keepalive"
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)
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// message represents a message published to a topic
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type message struct {
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Time int64 `json:"time"` // Unix time in seconds
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Event string `json:"event,omitempty"` // One of the above
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Message string `json:"message,omitempty"`
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}
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// messageEncoder is a function that knows how to encode a message
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type messageEncoder func(msg *message) (string, error)
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// newMessage creates a new message with the current timestamp
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func newMessage(event string, msg string) *message {
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return &message{
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Time: time.Now().Unix(),
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Event: event,
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Message: msg,
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}
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}
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// newOpenMessage is a convenience method to create an open message
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func newOpenMessage() *message {
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return newMessage(openEvent, "")
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}
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// newKeepaliveMessage is a convenience method to create a keepalive message
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func newKeepaliveMessage() *message {
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return newMessage(keepaliveEvent, "")
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}
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// newDefaultMessage is a convenience method to create a notification message
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func newDefaultMessage(msg string) *message {
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return newMessage("", msg)
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}
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