A plugins/seen.go

@@ -0,0 +1,46 @@
+package plugins
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/dustin/go-humanize"
+	"gopkg.in/irc.v3"
+)
+
+func init() {
+	Register(Seen{})
+}
+
+type Seen struct{}
+
+func (Seen) Triggers() []string {
+	return []string{".seen", ""}
+}
+
+var LastSeen sync.Map
+
+func (Seen) Execute(m *irc.Message) (string, error) {
+	// we just saw this user so.
+	LastSeen.Store(m.Name, time.Now())
+
+	if strings.HasPrefix(m.Params[1], ".seen") {
+		params := strings.Split(m.Trailing(), " ")
+		if len(params) == 1 {
+			return ".seen nickname", nil
+		}
+
+		if seen, ok := LastSeen.Load(params[1]); ok {
+			return fmt.Sprintf(
+				"\x02%s\x02 was last seen: %s",
+				params[1], humanize.Time(seen.(time.Time)),
+			), nil
+		} else {
+			return "I have not seen " + params[1], nil
+		}
+	}
+
+	return "", NoReply
+}