feat: implement telegram bot plugin (#1740)

plugin/telegram/request.go

@@ -0,0 +1,52 @@
+package telegram
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+)
+
+var ErrNoToken = errors.New("token is empty")
+
+func (r *Robot) postForm(ctx context.Context, apiPath string, formData url.Values, result any) error {
+	token := r.handler.RobotToken(ctx)
+	if token == "" {
+		return ErrNoToken
+	}
+
+	uri := "https://api.telegram.org/bot" + token + apiPath
+	resp, err := http.PostForm(uri, formData)
+	if err != nil {
+		return fmt.Errorf("fail to http.PostForm: %s", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("fail to ioutil.ReadAll: %s", err)
+	}
+
+	var respInfo struct {
+		Ok          bool   `json:"ok"`
+		ErrorCode   int    `json:"error_code"`
+		Description string `json:"description"`
+		Result      any    `json:"result"`
+	}
+
+	respInfo.Result = result
+
+	err = json.Unmarshal(body, &respInfo)
+	if err != nil {
+		return fmt.Errorf("fail to json.Unmarshal: %s", err)
+	}
+
+	if !respInfo.Ok {
+		return fmt.Errorf("api error: [%d]%s", respInfo.ErrorCode, respInfo.Description)
+	}
+
+	return nil
+}