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electric.go
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electric.go
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package merge
import (
"context"
"encoding/json"
"fmt"
"go.uber.org/multierr"
"go.uber.org/zap"
"google.golang.org/protobuf/proto"
"github.com/smart-core-os/sc-api/go/traits"
"github.com/smart-core-os/sc-golang/pkg/trait"
"github.com/smart-core-os/sc-golang/pkg/trait/electric"
"github.com/vanti-dev/gobacnet"
"github.com/vanti-dev/sc-bos/pkg/driver/bacnet/comm"
"github.com/vanti-dev/sc-bos/pkg/driver/bacnet/config"
"github.com/vanti-dev/sc-bos/pkg/driver/bacnet/known"
"github.com/vanti-dev/sc-bos/pkg/driver/bacnet/status"
"github.com/vanti-dev/sc-bos/pkg/gentrait/statuspb"
"github.com/vanti-dev/sc-bos/pkg/node"
"github.com/vanti-dev/sc-bos/pkg/task"
)
type electricConfig struct {
config.Trait
Demand *electricDemandConfig `json:"demand,omitempty"`
}
type electricDemandConfig struct {
*ElectricPhaseConfig // single phase
Phases [3]ElectricPhaseConfig `json:"phases,omitempty"`
}
type ElectricPhaseConfig struct {
Current *config.ValueSource `json:"current,omitempty"`
Voltage *config.ValueSource `json:"voltage,omitempty"`
Rating *config.ValueSource `json:"rating,omitempty"`
PowerFactor *config.ValueSource `json:"powerFactor,omitempty"`
RealPower *config.ValueSource `json:"realPower,omitempty"`
ApparentPower *config.ValueSource `json:"apparentPower,omitempty"`
ReactivePower *config.ValueSource `json:"reactivePower,omitempty"`
}
func readElectricConfig(raw []byte) (cfg electricConfig, err error) {
err = json.Unmarshal(raw, &cfg)
return
}
type electricTrait struct {
client *gobacnet.Client
known known.Context
statuses *statuspb.Map
logger *zap.Logger
model *electric.Model
*electric.ModelServer
config electricConfig
pollTask *task.Intermittent
}
func newElectric(client *gobacnet.Client, devices known.Context, statuses *statuspb.Map, config config.RawTrait, logger *zap.Logger) (*electricTrait, error) {
cfg, err := readElectricConfig(config.Raw)
if err != nil {
return nil, err
}
model := electric.NewModel()
_, _ = model.UpdateDemand(&traits.ElectricDemand{}) // reset defaults
t := &electricTrait{
client: client,
known: devices,
statuses: statuses,
logger: logger,
model: model,
ModelServer: electric.NewModelServer(model),
config: cfg,
}
t.pollTask = task.NewIntermittent(t.startPoll)
initTraitStatus(statuses, cfg.Name, "Emergency")
return t, nil
}
func (t *electricTrait) AnnounceSelf(a node.Announcer) node.Undo {
return a.Announce(t.config.Name, node.HasTrait(trait.Electric, node.WithClients(electric.WrapApi(t))))
}
func (t *electricTrait) GetDemand(ctx context.Context, request *traits.GetDemandRequest) (*traits.ElectricDemand, error) {
_, err := t.pollPeer(ctx)
if err != nil {
return nil, err
}
return t.ModelServer.GetDemand(ctx, request)
}
func (t *electricTrait) PullDemand(request *traits.PullDemandRequest, server traits.ElectricApi_PullDemandServer) error {
err := t.pollTask.Attach(server.Context())
if err != nil {
return err
}
// avoid returning the zero value if we are the first to attach since reboot
timeoutCtx, cleanup := context.WithTimeout(server.Context(), t.config.PollTimeoutDuration())
defer cleanup()
for change := range t.model.PullDemand(timeoutCtx) {
if !proto.Equal(change.Value, &traits.ElectricDemand{}) { // skip zero value
break
}
}
return t.ModelServer.PullDemand(request, server)
}
func (t *electricTrait) startPoll(init context.Context) (stop task.StopFn, err error) {
return startPoll(init, "electric", t.config.PollPeriodDuration(), t.config.PollTimeoutDuration(), t.logger, func(ctx context.Context) error {
_, err := t.pollPeer(ctx)
return err
})
}
func (t *electricTrait) pollPeer(ctx context.Context) (*traits.ElectricDemand, error) {
var toRead []config.ValueSource
var toWrite []func(v any) error // already scaled
var requestNames []string
dst := &traits.ElectricDemand{}
var phaseDemand [3]*traits.ElectricDemand
if cfg := t.config.Demand; cfg != nil {
if cfg.Current != nil {
requestNames = append(requestNames, "current")
toRead = append(toRead, *cfg.Current)
toWrite = append(toWrite, func(v any) (err error) {
dst.Current, err = comm.Float32Value(v)
return
})
}
if cfg.Voltage != nil {
requestNames = append(requestNames, "voltage")
toRead = append(toRead, *cfg.Voltage)
toWrite = append(toWrite, func(v any) (err error) {
dst.Voltage, err = ptr(comm.Float32Value(v))
return
})
}
if cfg.Rating != nil {
toRead = append(toRead, *cfg.Rating)
requestNames = append(requestNames, "rating")
toWrite = append(toWrite, func(v any) (err error) {
dst.Rating, err = comm.Float32Value(v)
return
})
}
readPhase := func(i int, phase ElectricPhaseConfig, dst *traits.ElectricDemand) {
suffix := ""
if i >= 0 {
suffix = fmt.Sprintf("L%d", i)
}
if phase.PowerFactor != nil {
requestNames = append(requestNames, "powerFactor"+suffix)
toRead = append(toRead, *phase.PowerFactor)
toWrite = append(toWrite, func(v any) (err error) {
dst.PowerFactor, err = ptr(comm.Float32Value(v))
return
})
}
if phase.RealPower != nil {
requestNames = append(requestNames, "realPower"+suffix)
toRead = append(toRead, *phase.RealPower)
toWrite = append(toWrite, func(v any) (err error) {
dst.RealPower, err = ptr(comm.Float32Value(v))
return
})
}
if phase.ApparentPower != nil {
requestNames = append(requestNames, "apparentPower"+suffix)
toRead = append(toRead, *phase.ApparentPower)
toWrite = append(toWrite, func(v any) (err error) {
dst.ApparentPower, err = ptr(comm.Float32Value(v))
return
})
}
if phase.ReactivePower != nil {
requestNames = append(requestNames, "reactivePower"+suffix)
toRead = append(toRead, *phase.ReactivePower)
toWrite = append(toWrite, func(v any) (err error) {
dst.ReactivePower, err = ptr(comm.Float32Value(v))
return
})
}
}
if cfg.ElectricPhaseConfig != nil {
readPhase(-1, *cfg.ElectricPhaseConfig, dst)
}
for i, phase := range cfg.Phases {
dst := &traits.ElectricDemand{}
phaseDemand[i] = dst
readPhase(i, phase, dst)
}
}
var errs []error
for i, response := range comm.ReadPropertiesChunked(ctx, t.client, t.known, t.config.ChunkSize, toRead...) {
err := toWrite[i](response)
if err != nil {
errs = append(errs, err)
}
}
// process phased electric devices.
// If there isn't a dedicated power value source for the combination we add each phase to produce the total
var power, apparent, reactive float32
for _, demand := range phaseDemand {
if demand == nil {
continue
}
// note: don't do this for power factor as that is complicated!
if demand.RealPower != nil {
power += *demand.RealPower
}
if demand.ApparentPower != nil {
apparent += *demand.ApparentPower
}
if demand.ReactivePower != nil {
reactive += *demand.ReactivePower
}
}
if dst.RealPower == nil && power != 0 {
dst.RealPower = &power
}
if dst.ApparentPower == nil && apparent != 0 {
dst.ApparentPower = &apparent
}
if dst.ReactivePower == nil && reactive != 0 {
dst.ReactivePower = &reactive
}
status.UpdatePollErrorStatus(t.statuses, t.config.Name, "Electric", requestNames, errs)
if len(errs) > 0 {
return nil, multierr.Combine(errs...)
}
return t.model.UpdateDemand(dst)
}