Files
go-ha/state.go
2025-01-22 08:39:55 +01:00

115 lines
3.0 KiB
Go

package gomeassistant
import (
"encoding/json"
"errors"
"fmt"
"time"
"github.com/golang-module/carbon"
"saml.dev/gome-assistant/internal/http"
)
type State interface {
AfterSunrise(...DurationString) bool
BeforeSunrise(...DurationString) bool
AfterSunset(...DurationString) bool
BeforeSunset(...DurationString) bool
ListEntities() ([]EntityState, error)
Get(entityId string) (EntityState, error)
Equals(entityId, state string) (bool, error)
}
// State is used to retrieve state from Home Assistant.
type StateImpl struct {
httpClient *http.HttpClient
latitude float64
longitude float64
}
type EntityState struct {
EntityID string `json:"entity_id"`
State string `json:"state"`
Attributes map[string]any `json:"attributes"`
LastChanged time.Time `json:"last_changed"`
}
func newState(c *http.HttpClient, homeZoneEntityId string) (*StateImpl, error) {
state := &StateImpl{httpClient: c}
err := state.getLatLong(c, homeZoneEntityId)
if err != nil {
return nil, err
}
return state, nil
}
func (s *StateImpl) getLatLong(c *http.HttpClient, homeZoneEntityId string) error {
resp, err := s.Get(homeZoneEntityId)
if err != nil {
return fmt.Errorf("couldn't get latitude/longitude from home assistant entity '%s'. Did you type it correctly? It should be a zone like 'zone.home'", homeZoneEntityId)
}
if resp.Attributes["latitude"] != nil {
s.latitude = resp.Attributes["latitude"].(float64)
} else {
return errors.New("server returned nil latitude")
}
if resp.Attributes["longitude"] != nil {
s.longitude = resp.Attributes["longitude"].(float64)
} else {
return errors.New("server returned nil longitude")
}
return nil
}
func (s *StateImpl) Get(entityId string) (EntityState, error) {
resp, err := s.httpClient.GetState(entityId)
if err != nil {
return EntityState{}, err
}
es := EntityState{}
err = json.Unmarshal(resp, &es)
return es, err
}
// ListEntities returns a list of all entities in Home Assistant.
// see rest documentation for more details: https://developers.home-assistant.io/docs/api/rest/#actions
func (s *StateImpl) ListEntities() ([]EntityState, error) {
resp, err := s.httpClient.States()
if err != nil {
return nil, err
}
es := []EntityState{}
err = json.Unmarshal(resp, &es)
return es, err
}
func (s *StateImpl) Equals(entityId string, expectedState string) (bool, error) {
currentState, err := s.Get(entityId)
if err != nil {
return false, err
}
return currentState.State == expectedState, nil
}
func (s *StateImpl) BeforeSunrise(offset ...DurationString) bool {
sunrise := getSunriseSunset(s /* sunrise = */, true, carbon.Now(), offset...)
return carbon.Now().Lt(sunrise)
}
func (s *StateImpl) AfterSunrise(offset ...DurationString) bool {
return !s.BeforeSunrise(offset...)
}
func (s *StateImpl) BeforeSunset(offset ...DurationString) bool {
sunset := getSunriseSunset(s /* sunrise = */, false, carbon.Now(), offset...)
return carbon.Now().Lt(sunset)
}
func (s *StateImpl) AfterSunset(offset ...DurationString) bool {
return !s.BeforeSunset(offset...)
}