blob: 4e0eddc65265d8a035f8510b0b742e973ec9449f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
package main
import (
"fmt"
"log"
)
type States map[string]bool
type Cache struct {
Tx chan MQTTMessage
States map[string]bool
}
func NewCache(tx chan MQTTMessage) Cache {
var cache Cache
cache.Tx = tx
cache.States = make(States)
return cache
}
func (c *Cache) Update(states States) {
if c.States == nil {
log.Fatal("Cache states is nil.")
}
if states == nil {
log.Fatal("Given states is nil.")
}
for id, state := range states {
cached, known := c.States[id]
if !known || cached != state {
topic := fmt.Sprintf("contact/%s/state", id)
var payload []byte
if state == true {
payload = []byte("open")
} else {
payload = []byte("closed")
}
c.Tx <- MQTTMessage{
Topic: topic,
Payload: payload,
}
}
c.States[id] = state
}
}
|
