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

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

@@ -0,0 +1,52 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package push
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/nikoksr/notify"
+	"github.com/nikoksr/notify/service/lark"
+)
+
+func init() {
+	Register("lark", &LarkPusher{})
+}
+
+// LarkPusher 基于 nikoksr/notify 的飞书 Webhook 机器人推送实现
+type LarkPusher struct{}
+
+// Send 发送飞书通知
+func (p *LarkPusher) Send(ctx context.Context, cfg Config, _ string, body map[string]any, _ string, _ map[string]any) (string, error) {
+	if cfg.URL == "" {
+		return "", errors.New("lark: webhook URL is required")
+	}
+
+	title := bodyTitle(body)
+	content := bodyContent(body, "**%s**: %v", "\n")
+
+	larkService := lark.NewWebhookService(cfg.URL)
+	notifier := notify.New()
+	notifier.UseServices(larkService)
+
+	if err := notifier.Send(ctx, title, content); err != nil {
+		return "", fmt.Errorf("lark: notify send failed: %w", err)
+	}
+
+	return "ok", nil
+}
+
+// ValidateConfig 校验飞书机器人配置
+func (p *LarkPusher) ValidateConfig(cfg Config) error {
+	if cfg.URL == "" {
+		return errors.New("webhook URL is required")
+	}
+	if !strings.HasPrefix(cfg.URL, "https://") {
+		return errors.New("webhook URL must use https:// protocol")
+	}
+	return nil
+}