first commit

util/util.go

@@ -0,0 +1,53 @@
+package util
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"time"
+)
+
+const RedrawInterval = 250 * time.Millisecond
+
+func Periodic(ctx context.Context, interval time.Duration, fn func() error) {
+	if err := fn(); err != nil {
+		panic(err)
+	}
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			if err := fn(); err != nil {
+				panic(err)
+			}
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func PanicOnErrorWithResult[E any](result E, err error) E {
+	if err != nil {
+		panic(err)
+	}
+	return result
+}
+
+func PanicOnError(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func DecodeJSON(r io.Reader, v any) error {
+	dec := json.NewDecoder(r)
+	if err := dec.Decode(v); err != nil {
+		if err == io.EOF {
+			return fmt.Errorf("empty stats stream")
+		}
+		return err
+	}
+	return nil
+}