♻️ Add tools.WriteValue

tools/write_buffer.go

@@ -0,0 +1,44 @@
+package tools
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"time"
+)
+
+func WriteValue(buff *bytes.Buffer, val any) (n int, err error) {
+	switch v := val.(type) {
+	default:
+		err = fmt.Errorf("Unsupported type %T", v)
+	case nil:
+		return
+	case string:
+		return buff.WriteString(v)
+	case int:
+		return buff.WriteString(strconv.Itoa(v))
+	case int64:
+		return buff.WriteString(strconv.FormatInt(v, 10))
+	case float64:
+		return buff.WriteString(strconv.FormatFloat(v, 'f', -1, 64))
+	case json.Number:
+		return buff.WriteString(v.String())
+	case json.RawMessage:
+		return buff.Write(v)
+	case []byte:
+		return buff.Write(v)
+	case byte:
+		err = buff.WriteByte(v)
+		if err == nil {
+			n = 1
+		}
+	case rune:
+		return buff.WriteString(string(v))
+	case bool:
+		return buff.WriteString(strconv.FormatBool(v))
+	case time.Time:
+		return buff.WriteString(v.Format(time.RFC3339))
+	}
+	return
+}