Switch to Debian testing and imagemagick. (#1021)

api/utils/throttle.go

@@ -0,0 +1,25 @@
+package utils
+
+import "time"
+
+type Throttle struct {
+	interval   time.Duration
+	lastAction time.Time
+}
+
+func NewThrottle(interval time.Duration) Throttle {
+	return Throttle{
+		interval:   interval,
+		lastAction: time.Unix(0, 0),
+	}
+}
+
+func (t *Throttle) Trigger(action func()) {
+	if action == nil {
+		return
+	}
+	if time.Now().After(t.lastAction.Add(t.interval)) {
+		t.lastAction = time.Now()
+		action()
+	}
+}