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// http://www.developers.meethue.com/documentation/lights-api
package hue
import (
"fmt"
"encoding/json"
"strings"
"errors"
)
type Light struct {
State struct {
On bool `json:"on"` // On or Off state of the light ("true" or "false")
Bri int `json:"bri"` // Brightness value 1-254
Hue int `json:"hue"` // Hue value 1-65535
Saturation int `json:"sat"` // Saturation value 0-254
Effect string `json:"effect"` // "None" or "Colorloop"
XY [2]float32 `json:"xy"` // Coordinates of color in CIE color space
CT int `json:"ct"` // Mired Color Temperature (google it)
Alert string `json:"alert"`
ColorMode string `json:"colormode"`
Reachable bool `json:"reachable"`
} `json:"state"`
Type string `json:"type"`
Name string `json:"name"`
ModelID string `json:"modelid"`
ManufacturerName string `json:"manufacturername"`
UniqueID string `json:"uniqueid"`
SWVersion string `json:"swversion"`
Index int // Set by index of light array response // TODO: change to smaller int
}
// LightState used in SetLightState to ammend light attributes.
type LightState struct {
On bool `json:"on"`
Bri uint8 `json:"bri,omitempty"`
Hue uint16 `json:"hue,omitempty"`
Sat uint8 `json:"sat,omitempty"`
XY *[2]float32 `json:"xy,omitempty"`
CT uint16 `json:"ct,omitempty"`
Effect string `json:"effect,omitempty"`
Alert string `json:"alert,omitempty"`
TransitionTime string `json:"transitiontime,omitempty"`
SaturationIncrement int `json:"sat_inc,omitempty"` // TODO: -254 to 254
HueIncrement int `json:"hue_inc,omitempty"` // TODO: -65534 to 65534
BrightnessIncrement int `json:"bri_inc,omitempty"` // TODO: -254 to 254
CTIncrement int `json:"ct_inc,omitempty"` // TODO: -65534 to 65534
XYIncrement *[2]float32 `json:"xy_inc,omitempty"`
}
func (self *Light) TurnOff() {
SetLightState(self.Index, LightState{On: false})
}
func (self *Light) TurnOn() {
SetLightState(self.Index, LightState{On: true})
}
// SetLightState will modify light attributes such as on/off, saturation,
// brightness, and more. See `SetLightState` struct.
func SetLightState(bridge *Bridge, index int, newState LightState) error {
uri := fmt.Sprintf("/api/%s/lights/%d/state", bridge.Username, index)
_, _, err := bridge.Put(uri, newState) // TODO: change to PUT
if err != nil {
return err
}
return nil
}
// GetAllLights retreives the state of all lights that the bridge is aware of.
func GetAllLights(bridge *Bridge) ([]Light, error) {
// Loop through all light indicies to see if they exist
// and parse their values. Supports 100 lights.
var lights []Light
for index := 1; index < 101; index++ {
// Send an http GET and inspect the response
uri := fmt.Sprintf("/api/%s/lights/%d", bridge.Username, index)
body, _, err := bridge.Get(uri)
if err != nil {
return lights, err
}
if strings.Contains(string(body), "not available") {
// Handle end of searchable lights
//fmt.Printf("\n\n%d lights found.\n\n", index)
break
}
// Parse and load the response into the light array
data := Light{}
err = json.Unmarshal(body, &data)
if err != nil {
trace("", err)
}
data.Index = index
lights = append(lights, data)
}
return lights, nil
}
// GetLight will return a light struct containing data on a given name.
func GetLight(bridge *Bridge, name string) (Light, error) {
lights, _ := GetAllLights(bridge)
for index := 0; index < len(lights); index++ {
if lights[index].Name == name {
return lights[index], nil
}
}
return Light{}, errors.New("Light not found.")
}
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