push

type Handler interface {
	// Init initializes the handler.
	Init(jsonconf string) error

	// IsReady сheckы if the handler is initialized.
	IsReady() bool

	// Push returns a channel that the server will use to send messages to.
	// The message will be dropped if the channel blocks.
	Push() chan<- *Receipt

	// Stop terminates the handler's worker and stops sending pushes.
	Stop()
}

type Payload struct {
	// Topic which received the message.
	Topic string `json:"topic"`
	// Message sender 'usrXXX'
	From string `json:"from"`
	// Timestapm of the message.
	Timestamp time.Time `json:"ts"`
	// Sequential ID of the message.
	SeqId int `json:"seq"`
	// MIME-Type of the message content, text/x-drafty or text/plain
	ContentType string `json:"mime"`
	// Actual Data.Content of the message, if requested
	Content interface{} `json:"content,omitempty"`
}

type Receipt struct {
	// List of recipients, including those who did not receive the message
	To map[t.Uid]Recipient `json:"to"`
	// Actual content to be delivered to the client
	Payload Payload `json:"payload"`
}

type Recipient struct {
	// Count of user's connections that were live when the packet was dispatched from the server
	Delivered int `json:"delivered"`
	// List of user's devices that the packet was delivered to (if known). Len(Devices) >= Delivered
	Devices []string `json:"devices,omitempty"`
	// Unread count to include in the push
	Unread int `json:"unread"`
}