Initial QSfera import

Server/vendor/github.com/r3labs/sse/v2/event_log.go

@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package sse
+
+import (
+	"strconv"
+	"time"
+)
+
+// EventLog holds all of previous events
+type EventLog []*Event
+
+// Add event to eventlog
+func (e *EventLog) Add(ev *Event) {
+	if !ev.hasContent() {
+		return
+	}
+
+	ev.ID = []byte(e.currentindex())
+	ev.timestamp = time.Now()
+	*e = append(*e, ev)
+}
+
+// Clear events from eventlog
+func (e *EventLog) Clear() {
+	*e = nil
+}
+
+// Replay events to a subscriber
+func (e *EventLog) Replay(s *Subscriber) {
+	for i := 0; i < len(*e); i++ {
+		id, _ := strconv.Atoi(string((*e)[i].ID))
+		if id >= s.eventid {
+			s.connection <- (*e)[i]
+		}
+	}
+}
+
+func (e *EventLog) currentindex() string {
+	return strconv.Itoa(len(*e))
+}