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package main
import (
"fmt"
"log"
"net"
"strings"
"github.com/gorilla/websocket"
)
func ShellyRun(config ShellyConfigs, route Route) {
for message := range route.Destination {
ip, command, err := parseMessage(config, message)
if err != nil {
log.Println(err)
continue
}
err = shellySendCommand(ip, command)
if err != nil {
log.Printf("Could not send command '%s' to %v: %v", command, ip, err)
}
}
}
func parseMessage(config ShellyConfigs, m MQTTMessage) (ip *net.IP, command string, err error) {
elements := strings.Split(m.Topic, "/")
if len(elements) != 3 {
return nil, "", fmt.Errorf(
"Expected three topic levels but got %d in '%s'.",
len(elements), m.Topic,
)
}
if elements[0] != "cover" || elements[2] != "movement" {
return nil, "", fmt.Errorf("Expected cover/<id>/movement but got: %s", m.Topic)
}
switch string(m.Payload) {
case "extend":
command = "Cover.Close"
case "retract":
command = "Cover.Open"
case "stop":
command = "Cover.Stop"
default:
return nil, "", fmt.Errorf("Invalid payload '%s'.", m.Payload)
}
id := elements[1]
for _, c := range config {
if c.ID == id {
ip := net.ParseIP(c.IP)
return &ip, command, nil
}
}
return nil, "", fmt.Errorf("Got message for unknown cover '%s'", id)
}
func shellySendCommand(ip *net.IP, command string) error {
template := `
{
"jsonrpc":"2.0",
"id": 1,
"src":"user_1",
"method":"%s",
"params": {
"id":0
}
}
`
message := fmt.Appendf([]byte{}, template, command)
c, _, err := websocket.DefaultDialer.Dial("ws://" + ip.String() + "/rpc", nil)
if err != nil {
return fmt.Errorf("Could not connect to Shelly: %w", err)
}
defer c.Close()
err = c.WriteMessage(websocket.TextMessage, message)
if err != nil {
return fmt.Errorf("Failed writing websocket message to Shelly: %w", err)
}
return nil
}
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