new request system

api.go

@@ -16,6 +16,53 @@ type ApiResponse struct {
 	Result      any    `json:"result,omitempty"`
 	ErrorCode   int    `json:"error_code,omitempty"`
 }
+type ApiResponseG[R any] struct {
+	Ok          bool   `json:"ok"`
+	Description string `json:"description,omitempty"`
+	Result      R      `json:"result,omitempty"`
+	ErrorCode   int    `json:"error_code,omitempty"`
+}
+
+type TelegramRequest[R, P any] struct {
+	method string
+	params P
+}
+type EmptyParams struct{}
+
+func NewRequest[R, P any](method string, params P) TelegramRequest[R, P] {
+	return TelegramRequest[R, P]{
+		method: method,
+		params: params,
+	}
+}
+func (r TelegramRequest[R, P]) Do(bot *Bot) (*R, error) {
+	var buf bytes.Buffer
+	err := json.NewEncoder(&buf).Encode(r.params)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.Post(fmt.Sprintf("https://api.telegram.org/bot%s/%s", bot.token, r.method), "application/json", &buf)
+	if err != nil {
+		return nil, err
+	}
+	defer req.Body.Close()
+	data, err := io.ReadAll(req.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	response := new(ApiResponseG[R])
+	err = json.Unmarshal(data, &response)
+	if err != nil {
+		return nil, err
+	}
+
+	if !response.Ok {
+		return nil, fmt.Errorf("[%d] %s", response.ErrorCode, response.Description)
+	}
+	return &response.Result, nil
+}
 
 // request is a low-level call to api.
 func (b *Bot) request(methodName string, params any) (map[string]any, error) {