switch from shaky ignores to a refractory period on commands

handlers/deadline/deadline.go

@@ -0,0 +1,55 @@
+// package deadline is a Hugot handler that aims to reduce channel noise on a
+// wrapped handler. Upon invocation, a deadline is set. Further invocations will
+// be ignored until after the deadline has passed.
+package deadline
+
+import (
+	"time"
+
+	"github.com/tcolgate/hugot"
+	"golang.org/x/net/context"
+)
+
+type HearsDeadline struct {
+	hugot.HearsHandler
+
+	Deadline time.Time
+}
+
+type CommandDeadline struct {
+	hugot.CommandHandler
+
+	Deadline time.Time
+}
+
+func NewCommand(next hugot.CommandHandler) hugot.CommandHandler {
+	return &CommandDeadline{CommandHandler: next, Deadline: time.Now().UTC()}
+}
+
+func NewHears(next hugot.HearsHandler) hugot.HearsHandler {
+	return &HearsDeadline{HearsHandler: next, Deadline: time.Now().UTC()}
+}
+
+func (i *HearsDeadline) Heard(ctx context.Context, w hugot.ResponseWriter, m *hugot.Message, matches [][]string) {
+	now := time.Now().UTC()
+	if now.After(i.Deadline) {
+		i.Deadline = now.Add(2 * time.Minute)
+		i.HearsHandler.Heard(ctx, w, m, matches)
+		return
+	}
+
+	// punish channel noise harder if people start spamming
+	// i.Deadline = i.Deadline.Add(1 * time.Minute)
+}
+
+func (i *CommandDeadline) Command(ctx context.Context, w hugot.ResponseWriter, m *hugot.Message) error {
+	now := time.Now().UTC()
+	if now.After(i.Deadline) {
+		i.Deadline = now.Add(2 * time.Minute)
+		return i.CommandHandler.Command(ctx, w, m)
+	}
+
+	// punish channel noise harder if people start spamming
+	// i.Deadline = i.Deadline.Add(1 * time.Minute)
+	return nil
+}