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

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

@@ -0,0 +1,68 @@
+// 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/bark"
+)
+
+func init() {
+	Register("bark", &BarkPusher{})
+}
+
+// BarkPusher 基于 nikoksr/notify 的 Bark iOS 客户端通知推送实现
+type BarkPusher struct{}
+
+// Send 发送 Bark 通知
+func (p *BarkPusher) Send(ctx context.Context, cfg Config, target string, body map[string]any, _ string, _ map[string]any) (string, error) {
+	deviceKey := cfg.Key
+	if deviceKey == "" {
+		deviceKey = cfg.Secret
+	}
+	if target != "" {
+		deviceKey = target
+	}
+	if deviceKey == "" {
+		return "", errors.New("bark: device key is required")
+	}
+
+	serverURL := strings.TrimRight(cfg.URL, "/")
+	if serverURL == "" {
+		serverURL = bark.DefaultServerURL
+	}
+
+	title := bodyTitle(body)
+	content := bodyContent(body, "%s: %v", "\n")
+
+	barkService := bark.NewWithServers(deviceKey, serverURL)
+	notifier := notify.New()
+	notifier.UseServices(barkService)
+
+	if err := notifier.Send(ctx, title, content); err != nil {
+		return "", fmt.Errorf("bark: notify send failed: %w", err)
+	}
+
+	return "ok", nil
+}
+
+// ValidateConfig 校验 Bark 配置
+func (p *BarkPusher) ValidateConfig(cfg Config) error {
+	deviceKey := cfg.Key
+	if deviceKey == "" {
+		deviceKey = cfg.Secret
+	}
+	if deviceKey == "" {
+		return errors.New("device key is required")
+	}
+	if cfg.URL != "" && !strings.HasPrefix(cfg.URL, "http://") && !strings.HasPrefix(cfg.URL, "https://") {
+		return errors.New("server URL must start with http:// or https://")
+	}
+	return nil
+}