-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
199 lines (159 loc) · 3.89 KB
/
main.go
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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
package main
import (
"bufio"
"context"
"encoding/json"
"log"
"os"
"sync/atomic"
"github.com/pojntfx/panrpc/go/pkg/rpc"
"nhooyr.io/websocket"
)
type remoteControl struct{}
func (s *remoteControl) SetCoffeeMachineBrewing(ctx context.Context, brewing bool) error {
if brewing {
log.Println("Coffee machine is now brewing")
} else {
log.Println("Coffee machine has stopped brewing")
}
return nil
}
type teaBrewer struct {
GetVariants func(ctx context.Context) ([]string, error)
}
type coffeeMachine[E any] struct {
Extension E
BrewCoffee func(
ctx context.Context,
variant string,
size int,
onProgress func(ctx context.Context, percentage int) error,
) (int, error)
}
func main() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var clients atomic.Int64
registry := rpc.NewRegistry[coffeeMachine[teaBrewer], json.RawMessage](
&remoteControl{},
&rpc.RegistryHooks{
OnClientConnect: func(remoteID string) {
log.Printf("%v coffee machines connected", clients.Add(1))
},
OnClientDisconnect: func(remoteID string) {
log.Printf("%v coffee machines connected", clients.Add(-1))
},
},
)
go func() {
log.Println(`Enter one of the following numbers followed by <ENTER> to brew a coffee:
- 1: Brew small Cafè Latte
- 2: Brew large Cafè Latte
- 3: Brew small Americano
- 4: Brew large Americano
Or enter 5 to list available tea variants.`)
stdin := bufio.NewReader(os.Stdin)
for {
line, err := stdin.ReadString('\n')
if err != nil {
panic(err)
}
if err := registry.ForRemotes(func(remoteID string, remote coffeeMachine[teaBrewer]) error {
switch line {
case "1\n":
fallthrough
case "2\n":
res, err := remote.BrewCoffee(
ctx,
"latte",
func() int {
if line == "1" {
return 100
} else {
return 200
}
}(),
func(ctx context.Context, percentage int) error {
log.Printf(`Brewing Cafè Latte ... %v%% done`, percentage)
return nil
},
)
if err != nil {
log.Println("Couldn't brew Cafè Latte:", err)
return nil
}
log.Println("Remaining water:", res, "ml")
case "3\n":
fallthrough
case "4\n":
res, err := remote.BrewCoffee(
ctx,
"americano",
func() int {
if line == "1" {
return 100
} else {
return 200
}
}(),
func(ctx context.Context, percentage int) error {
log.Printf(`Brewing Americano ... %v%% done`, percentage)
return nil
},
)
if err != nil {
log.Println("Couldn't brew Americano:", err)
return nil
}
log.Println("Remaining water:", res, "ml")
case "5\n":
res, err := remote.Extension.GetVariants(ctx)
if err != nil {
log.Println("Couldn't list available tea variants:", err)
return nil
}
log.Println("Available tea variants:", res)
default:
log.Printf("Unknown letter %v, ignoring input", line)
return nil
}
return nil
}); err != nil {
panic(err)
}
}
}()
// Connect to WebSocket server
c, _, err := websocket.Dial(ctx, "ws://127.0.0.1:1337", nil)
if err != nil {
panic(err)
}
conn := websocket.NetConn(ctx, c, websocket.MessageText)
defer conn.Close()
log.Println("Connected to localhost:1337")
// Set up the streaming JSON encoder and decoder
encoder := json.NewEncoder(conn)
decoder := json.NewDecoder(conn)
if err := registry.LinkStream(
ctx,
func(v rpc.Message[json.RawMessage]) error {
return encoder.Encode(v)
},
func(v *rpc.Message[json.RawMessage]) error {
return decoder.Decode(v)
},
func(v any) (json.RawMessage, error) {
b, err := json.Marshal(v)
if err != nil {
return nil, err
}
return json.RawMessage(b), nil
},
func(data json.RawMessage, v any) error {
return json.Unmarshal([]byte(data), v)
},
nil,
); err != nil {
panic(err)
}
}