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

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

@@ -0,0 +1,69 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package push
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/nikoksr/notify"
+	"github.com/nikoksr/notify/service/pushover"
+)
+
+func init() {
+	Register("pushover", &PushoverPusher{})
+}
+
+// PushoverPusher 基于 nikoksr/notify 的 Pushover 移动端推送实现
+type PushoverPusher struct{}
+
+// Send 发送 Pushover 通知
+func (p *PushoverPusher) Send(ctx context.Context, cfg Config, target string, body map[string]any, _ string, _ map[string]any) (string, error) {
+	appToken := cfg.Key
+	if appToken == "" {
+		appToken = cfg.Secret
+	}
+	if appToken == "" {
+		return "", errors.New("pushover: app token is required")
+	}
+
+	userKey := cfg.URL
+	if userKey == "" {
+		userKey = cfg.Other
+	}
+	if target != "" {
+		userKey = target
+	}
+	if userKey == "" {
+		return "", errors.New("pushover: user key is required")
+	}
+
+	title := bodyTitle(body)
+	content := bodyContent(body, "%s: %v", "\n")
+
+	poService := pushover.New(appToken)
+	poService.AddReceivers(userKey)
+
+	notifier := notify.New()
+	notifier.UseServices(poService)
+
+	if err := notifier.Send(ctx, title, content); err != nil {
+		return "", fmt.Errorf("pushover: notify send failed: %w", err)
+	}
+
+	return "ok", nil
+}
+
+// ValidateConfig 校验 Pushover 配置
+func (p *PushoverPusher) ValidateConfig(cfg Config) error {
+	appToken := cfg.Key
+	if appToken == "" {
+		appToken = cfg.Secret
+	}
+	if appToken == "" {
+		return errors.New("app token is required")
+	}
+	return nil
+}