67 lines
1.2 KiB
Go
67 lines
1.2 KiB
Go
package homeassistant
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import (
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"context"
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"fmt"
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"strings"
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"sync"
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"github.com/evcc-io/evcc/util"
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"github.com/libp2p/zeroconf/v2"
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)
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var (
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mu sync.Mutex
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instances = make(map[string]string)
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)
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func init() {
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go scan()
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}
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func instanceUriByName(name string) string {
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mu.Lock()
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defer mu.Unlock()
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return instances[name]
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}
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func addInstance(name, uri string) {
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mu.Lock()
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defer mu.Unlock()
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instances[name] = uri
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}
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func scan() {
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ctx := context.Background()
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entries := make(chan *zeroconf.ServiceEntry, 1)
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go func() {
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for {
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select {
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case se := <-entries:
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uri := fmt.Sprintf("http://%s:%d", se.HostName, se.Port)
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OUTER:
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for _, text := range se.Text {
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for _, prefix := range []string{"external_url", "base_url", "internal_url"} {
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if u, ok := strings.CutPrefix(text, prefix+"="); ok && u != "" {
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uri = u
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break OUTER
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}
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}
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}
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addInstance(se.Instance, uri)
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case <-ctx.Done():
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return
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}
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}
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}()
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if err := zeroconf.Browse(ctx, "_home-assistant._tcp.", "local.", entries); err != nil {
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log := util.NewLogger("homeassistant")
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log.ERROR.Println("zeroconf: failed to browse:", err.Error())
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}
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}
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