89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
package server
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import (
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"encoding/json"
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"fmt"
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"math"
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"reflect"
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"strings"
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"time"
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"github.com/evcc-io/evcc/util"
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"github.com/kr/pretty"
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)
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func encode(v interface{}) (string, error) {
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var s string
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switch val := v.(type) {
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case time.Time:
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if val.IsZero() {
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s = "null"
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} else {
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s = fmt.Sprintf(`"%s"`, val.Format(time.RFC3339))
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}
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case time.Duration:
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// must be before stringer to convert to seconds instead of string
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s = fmt.Sprintf("%d", int64(val.Seconds()))
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case float64:
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if math.IsNaN(val) {
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s = "null"
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} else {
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s = fmt.Sprintf("%.5g", val)
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}
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default:
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if b, err := json.Marshal(v); err == nil {
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s = string(b)
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} else {
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return "", err
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}
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}
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return s, nil
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}
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func encodeSlice(v interface{}) (string, error) {
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rv := reflect.ValueOf(v)
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res := make([]string, rv.Len())
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for i := 0; i < rv.Len(); i++ {
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var err error
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if res[i], err = encode(rv.Index(i).Interface()); err != nil {
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return "", err
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}
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}
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return fmt.Sprintf("[%s]", strings.Join(res, ",")), nil
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}
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func kv(p util.Param) string {
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var (
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val string
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err error
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)
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// unwrap slices
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if p.Val != nil && reflect.TypeOf(p.Val).Kind() == reflect.Slice {
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val, err = encodeSlice(p.Val)
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} else {
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val, err = encode(p.Val)
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}
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if err != nil {
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panic(err)
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}
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if p.Key == "" && val == "" {
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log.ERROR.Printf("invalid key/val for %+v %# v, please report to https://github.com/evcc-io/evcc/issues/6439", p, pretty.Formatter(p.Val))
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return "\"foo\":\"bar\""
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}
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var msg strings.Builder
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msg.WriteString("\"")
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if p.Loadpoint != nil {
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msg.WriteString(fmt.Sprintf("loadpoints.%d.", *p.Loadpoint))
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}
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msg.WriteString(p.Key)
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msg.WriteString("\":")
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msg.WriteString(val)
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return msg.String()
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}
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