81 lines
1.4 KiB
Go
81 lines
1.4 KiB
Go
package provider
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import (
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"fmt"
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"math"
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"strconv"
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"time"
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"github.com/evcc-io/evcc/provider/pipeline"
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"github.com/evcc-io/evcc/util"
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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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pipeline *pipeline.Pipeline
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payload string
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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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h.mux.Lock()
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defer h.mux.Unlock()
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if late := h.mux.Overdue(); late > 0 {
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return "", fmt.Errorf("%s outdated: %v", h.topic, late.Truncate(time.Second))
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}
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if h.pipeline != nil {
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b, err := h.pipeline.Process([]byte(h.payload))
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return string(b), err
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}
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return h.payload, nil
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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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