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package main
import (
"fmt"
"log"
"os"
"os/signal"
"syscall"
"time"
"xengineering.eu/homematic-go/homematic"
)
const (
OPENCCU = `http://127.0.0.1:8080`
POLLING_PERIOD = 50 * time.Millisecond
)
func main() {
log.Println("+++ Started Sia server +++")
defer log.Println("--- Stopped Sia server ---")
go func() {
tx := make(chan MQTTMessage)
go MQTTRun(tx)
req, inventory, err := Start()
if err != nil {
log.Fatalf("Failed startup process: %v", err)
}
cache := NewCache(tx)
for {
start := time.Now()
states, err := Poll(req, inventory)
if err != nil {
log.Fatalf("Failed to poll states: %v", err)
}
cache.Update(states)
WaitUntil(start.Add(POLLING_PERIOD))
}
}()
Await(syscall.SIGTERM, syscall.SIGINT)
}
func Start() (homematic.Requester, homematic.Devices, error) {
var req homematic.Requester
var inventory homematic.Devices
var err error
req = homematic.NewRequester(OPENCCU)
log.Printf("Created Homematic requester (%s).", OPENCCU)
inventory, err = req.ListDevices()
if err != nil {
return req, inventory, fmt.Errorf("Failed getting initial device list: %w", err)
}
log.Printf("Retrieved Homematic inventory with %d devices.", len(inventory))
return req, inventory, nil
}
func Poll(req homematic.Requester, inventory homematic.Devices) (States, error) {
states := make(States)
for _, device := range inventory {
if device.Type == `SHUTTER_CONTACT` {
state, err := req.GetValue(device.Address)
if err != nil {
return states, fmt.Errorf("Failed to get value: %w", err)
}
states[device.Address] = state
}
}
return states, nil
}
func Await(signals ...syscall.Signal) {
listener := make(chan os.Signal)
for _, s := range signals {
signal.Notify(listener, s)
}
sig := <-listener
log.Printf("Received OS signal '%v'\n", sig)
}
func WaitUntil(deadline time.Time) {
duration := time.Until(deadline)
if duration > 0 {
time.Sleep(duration)
}
}
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