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The chat API enables users to chat with each other in a globally available chat. It supports basic text messages to be sent between each user.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -16,6 +16,7 @@ | |
| !cmd/ | ||
| !pkg/ | ||
| !pkg/api/ | ||
| !pkg/chat/ | ||
| !pkg/filesystem/ | ||
| !pkg/game/ | ||
| !pkg/game/argument/ | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "strings" | ||
| "time" | ||
|
|
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| "github.com/gorilla/websocket" | ||
| "github.com/seternate/go-lanty/pkg/chat" | ||
| ) | ||
|
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| type ChatService struct { | ||
| client *Client | ||
| ws *websocket.Conn | ||
|
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| Messages chan chat.Message | ||
| Error error | ||
| } | ||
|
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| // If client.baseURL is changed while being connected a Reconnect for this service has to be made | ||
| func (service *ChatService) Connect() (resp *http.Response, err error) { | ||
| defer func() { service.Error = err }() | ||
| path, err := service.client.router.Get("Chat").URLPath() | ||
| if err != nil { | ||
| return | ||
| } | ||
| path.Scheme = "ws" | ||
| url := service.client.buildURL(*path) | ||
| service.ws, resp, err = websocket.DefaultDialer.Dial((&url).String(), nil) | ||
| if err != nil { | ||
| err = fmt.Errorf("error connecting to server chat websocket: %w", err) | ||
| return | ||
| } | ||
| service.Error = nil | ||
| go service.run() | ||
| return | ||
| } | ||
|
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| func (service *ChatService) Disconnect() (err error) { | ||
| if service.ws == nil { | ||
| return | ||
| } | ||
| err = service.ws.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) | ||
| if err != nil { | ||
| service.Error = err | ||
| } | ||
| return | ||
| } | ||
|
|
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| func (service *ChatService) Reconnect() (err error) { | ||
| defer func() { service.Error = err }() | ||
| err = service.Disconnect() | ||
| _, err = service.Connect() | ||
| return | ||
| } | ||
|
|
||
| func (service *ChatService) SendMessage(message chat.Message) (err error) { | ||
| if service.ws == nil { | ||
| return fmt.Errorf("can not send chat message: %w", service.Error) | ||
| } | ||
| message.SetTime(time.Now()) | ||
| err = service.ws.WriteJSON(message) | ||
| if err != nil { | ||
| service.Error = err | ||
| } | ||
| return | ||
| } | ||
|
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||
| func (service *ChatService) run() { | ||
| for service.Error == nil && service.ws != nil { | ||
| messageType, reader, err := service.ws.NextReader() | ||
| if err != nil { | ||
| service.Error = fmt.Errorf("%w: permanent error reading from client websocket", err) | ||
| service.Disconnect() | ||
| return | ||
| } | ||
| if messageType == websocket.BinaryMessage { | ||
| continue | ||
| } | ||
|
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||
| message, err := chat.ReadMessage(reader) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| if len(strings.TrimSpace(message.GetMessage())) == 0 { | ||
| continue | ||
| } | ||
| if len(strings.TrimSpace(message.GetUser().Name)) == 0 || len(strings.TrimSpace(message.GetUser().IP)) == 0 { | ||
| continue | ||
| } | ||
| if message.GetTime().IsZero() { | ||
| continue | ||
| } | ||
|
|
||
| service.Messages <- message | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| package chat | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "time" | ||
|
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| "github.com/seternate/go-lanty/pkg/user" | ||
| ) | ||
|
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| type Message interface { | ||
| GetType() Type | ||
| GetUser() user.User | ||
| GetMessage() string | ||
| GetTime() time.Time | ||
| SetTime(time.Time) | ||
| } | ||
|
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| type tmpMessage struct { | ||
| Type Type `json:"type"` | ||
| User user.User `json:"user"` | ||
| Time time.Time `json:"time"` | ||
| } | ||
|
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| func ReadMessage(r io.Reader) (Message, error) { | ||
| tmpMessageJson, err := io.ReadAll(r) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| tmpMessage := &tmpMessage{} | ||
| err = json.Unmarshal(tmpMessageJson, tmpMessage) | ||
| if err == io.EOF { | ||
| err = io.ErrUnexpectedEOF | ||
| return nil, err | ||
| } | ||
|
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| switch tmpMessage.Type { | ||
| case TYPE_TEXT: | ||
| textmessage := &TextMessage{} | ||
| err = json.Unmarshal(tmpMessageJson, textmessage) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return textmessage, err | ||
| } | ||
| return nil, fmt.Errorf("undefined message type: %s", tmpMessage.Type.String()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package chat | ||
|
|
||
| import ( | ||
| "time" | ||
|
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| "github.com/seternate/go-lanty/pkg/user" | ||
| ) | ||
|
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| type TextMessage struct { | ||
| Type Type `json:"type"` | ||
| User user.User `json:"user"` | ||
| Message textMessageText `json:"message"` | ||
| Time time.Time `json:"time"` | ||
| } | ||
|
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| type textMessageText struct { | ||
| Text string `json:"text"` | ||
| } | ||
|
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| func NewTextMessage(user user.User, message string) *TextMessage { | ||
| return &TextMessage{ | ||
| Type: TYPE_TEXT, | ||
| User: user, | ||
| Message: textMessageText{message}, | ||
| Time: time.Now(), | ||
| } | ||
| } | ||
|
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| func (message *TextMessage) GetType() Type { | ||
| return message.Type | ||
| } | ||
|
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| func (message *TextMessage) GetUser() user.User { | ||
| return message.User | ||
| } | ||
|
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| func (message *TextMessage) GetMessage() string { | ||
| return message.Message.Text | ||
| } | ||
|
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| func (message *TextMessage) GetTime() time.Time { | ||
| return message.Time | ||
| } | ||
|
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| func (message *TextMessage) SetTime(t time.Time) { | ||
| message.Time = t | ||
| } |
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