Home Assistant: add plugin source, support temp for heating switch devices (BC) (#31915)

plugin/homeassistant.go

@@ -0,0 +1,91 @@
+package plugin
+
+import (
+	"context"
+	"errors"
+
+	"github.com/evcc-io/evcc/util"
+	"github.com/evcc-io/evcc/util/homeassistant"
+)
+
+// HomeAssistant reads and writes Home Assistant entity states
+type HomeAssistant struct {
+	conn   *homeassistant.Connection
+	entity string
+}
+
+func init() {
+	registry.AddCtx("homeassistant", NewHomeAssistantPluginFromConfig)
+}
+
+// NewHomeAssistantPluginFromConfig creates a Home Assistant plugin
+func NewHomeAssistantPluginFromConfig(ctx context.Context, other map[string]any) (Plugin, error) {
+	var cc struct {
+		homeassistant.Config `mapstructure:",squash"`
+		Entity               string
+	}
+
+	if err := util.DecodeOther(other, &cc); err != nil {
+		return nil, err
+	}
+
+	if cc.Entity == "" {
+		return nil, errors.New("missing entity")
+	}
+
+	conn, err := homeassistant.NewConnection(util.NewLogger("homeassistant"), cc.URI, cc.Home_, cc.Insecure)
+	if err != nil {
+		return nil, err
+	}
+
+	return &HomeAssistant{
+		conn:   conn,
+		entity: cc.Entity,
+	}, nil
+}
+
+var _ StringGetter = (*HomeAssistant)(nil)
+
+// StringGetter returns the entity state
+func (p *HomeAssistant) StringGetter() (func() (string, error), error) {
+	return func() (string, error) {
+		res, err := p.conn.GetState(p.entity)
+		return res.State, err
+	}, nil
+}
+
+var _ FloatGetter = (*HomeAssistant)(nil)
+
+// FloatGetter returns the entity state as float
+func (p *HomeAssistant) FloatGetter() (func() (float64, error), error) {
+	return func() (float64, error) {
+		return p.conn.GetFloatState(p.entity)
+	}, nil
+}
+
+var _ IntGetter = (*HomeAssistant)(nil)
+
+// IntGetter returns the entity state as int
+func (p *HomeAssistant) IntGetter() (func() (int64, error), error) {
+	return func() (int64, error) {
+		return p.conn.GetIntState(p.entity)
+	}, nil
+}
+
+var _ BoolGetter = (*HomeAssistant)(nil)
+
+// BoolGetter returns the entity state as bool
+func (p *HomeAssistant) BoolGetter() (func() (bool, error), error) {
+	return func() (bool, error) {
+		return p.conn.GetBoolState(p.entity)
+	}, nil
+}
+
+var _ BoolSetter = (*HomeAssistant)(nil)
+
+// BoolSetter invokes the entity's turn_on/turn_off service
+func (p *HomeAssistant) BoolSetter(param string) (func(bool) error, error) {
+	return func(enable bool) error {
+		return p.conn.CallSwitchService(p.entity, enable)
+	}, nil
+}