refactor(msg_gateway): restructure and rename message_gateway aligned with custom_example

backend/plugins/domain/msg_gateway/push/dingtalk.go

@@ -0,0 +1,66 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package push
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+
+	"github.com/nikoksr/notify"
+	"github.com/nikoksr/notify/service/dingding"
+)
+
+func init() {
+	Register("dingtalk", &DingTalkPusher{})
+}
+
+// DingTalkPusher 基于 nikoksr/notify 的钉钉机器人推送实现
+type DingTalkPusher struct{}
+
+// Send 发送钉钉通知
+func (p *DingTalkPusher) Send(ctx context.Context, cfg Config, _ string, body map[string]any, _ string, _ map[string]any) (string, error) {
+	token := cfg.Key
+	if token == "" {
+		if u, err := url.Parse(cfg.URL); err == nil {
+			token = u.Query().Get("access_token")
+		}
+	}
+	if token == "" {
+		token = cfg.URL
+	}
+	if token == "" {
+		return "", errors.New("dingtalk: access token or webhook URL is required")
+	}
+
+	title := bodyTitle(body)
+	content := bodyContent(body, "**%s**: %v", "\n\n")
+
+	dingService := dingding.New(&dingding.Config{
+		Token:  token,
+		Secret: cfg.Secret,
+	})
+
+	notifier := notify.New()
+	notifier.UseServices(dingService)
+
+	if err := notifier.Send(ctx, title, content); err != nil {
+		return "", fmt.Errorf("dingtalk: notify send failed: %w", err)
+	}
+
+	return "ok", nil
+}
+
+// ValidateConfig 校验钉钉配置
+func (p *DingTalkPusher) ValidateConfig(cfg Config) error {
+	if cfg.URL == "" && cfg.Key == "" {
+		return errors.New("webhook URL or access token is required")
+	}
+	if cfg.URL != "" && !strings.HasPrefix(cfg.URL, "https://") {
+		return errors.New("webhook URL must use https:// protocol")
+	}
+	return nil
+}