96 lines
1.7 KiB
Go
96 lines
1.7 KiB
Go
package provider
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import (
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"fmt"
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"math"
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"regexp"
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"strconv"
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"time"
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"github.com/evcc-io/evcc/util"
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"github.com/evcc-io/evcc/util/jq"
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"github.com/itchyny/gojq"
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)
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type msgHandler struct {
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mux *util.Waiter
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scale float64
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topic string
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payload string
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re *regexp.Regexp
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jq *gojq.Query
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}
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func (h *msgHandler) receive(payload string) {
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h.mux.Lock()
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defer h.mux.Unlock()
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h.payload = payload
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h.mux.Update()
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}
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// hasValue returned the received and processed payload as string
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func (h *msgHandler) hasValue() (string, error) {
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elapsed := h.mux.LockWithTimeout()
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defer h.mux.Unlock()
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if elapsed > 0 {
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return "", fmt.Errorf("%s outdated: %v", h.topic, elapsed.Truncate(time.Second))
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}
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var err error
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payload := h.payload
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if h.re != nil {
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m := h.re.FindStringSubmatch(payload)
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if len(m) > 1 {
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payload = m[1] // first submatch
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}
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}
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if h.jq != nil {
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var val interface{}
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if val, err = jq.Query(h.jq, []byte(payload)); err == nil {
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payload = fmt.Sprintf("%v", val)
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}
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}
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return payload, err
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}
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func (h *msgHandler) floatGetter() (float64, error) {
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v, err := h.hasValue()
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if err != nil {
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return 0, err
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}
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f, err := strconv.ParseFloat(v, 64)
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if err != nil {
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return 0, fmt.Errorf("%s invalid: '%s'", h.topic, v)
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}
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return f * h.scale, nil
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}
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func (h *msgHandler) intGetter() (int64, error) {
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f, err := h.floatGetter()
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return int64(math.Round(f)), err
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}
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func (h *msgHandler) stringGetter() (string, error) {
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v, err := h.hasValue()
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if err != nil {
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return "", err
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}
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return string(v), nil
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}
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func (h *msgHandler) boolGetter() (bool, error) {
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v, err := h.hasValue()
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if err != nil {
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return false, err
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}
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return util.Truish(v), nil
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}
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