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junhong_cmp_fiber/docs/7月迭代/基础设施/站内消息.md
2026-07-13 12:01:18 +09:00

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基础设施站内消息Notification

被依赖:需求 18/20/21审批流通知、需求 22临期提醒
Phase 2 扩展:企业微信推送、短信通知(预留插拔接口)


一、设计原则

  • 业务代码不直接写通知:只发 Asynq 任务,异步处理
  • 不过度抽象:不用 interface用具体的 NotificationPublisher(后续加渠道 = 在 handler 里加代码)
  • 前端轮询30秒一次 /admin/notifications/unread-count,不用 WebSocket

二、数据库

-- 迁移文件YYYYMMDD_create_tb_notification.sql
CREATE TABLE tb_notification (
    id             BIGSERIAL PRIMARY KEY,
    recipient_id   BIGINT NOT NULL,          -- 用户IDadmin user 或 agent user
    recipient_type VARCHAR(20) NOT NULL DEFAULT 'admin', -- admin | agent
    type           VARCHAR(50) NOT NULL,     -- 通知类型(见常量定义)
    title          VARCHAR(200) NOT NULL,    -- 标题
    body           TEXT NOT NULL DEFAULT '', -- 正文(支持简单 HTML
    ref_type       VARCHAR(50),              -- 关联业务类型 approval | recharge | refund | package
    ref_id         BIGINT,                   -- 关联业务ID
    is_read        BOOLEAN NOT NULL DEFAULT FALSE,
    read_at        TIMESTAMPTZ,
    created_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    expires_at     TIMESTAMPTZ               -- 过期自动不展示(可选,临期提醒用)
);

CREATE INDEX idx_notification_recipient ON tb_notification (recipient_id, recipient_type, is_read);
CREATE INDEX idx_notification_created   ON tb_notification (created_at DESC);

COMMENT ON TABLE tb_notification IS '站内消息通知表';

三、常量定义

// pkg/constants/notification.go

// 通知类型
const (
    NotifyTypeApprovalPending  = "approval.pending"   // 待我审批
    NotifyTypeApprovalDone     = "approval.done"       // 审批完成(申请人收)
    NotifyTypeApprovalRejected = "approval.rejected"   // 审批驳回(申请人收,流程终止)
    NotifyTypeApprovalReturned = "approval.returned"   // 审批退回(申请人收,可修改后重新提交)
    NotifyTypePackageExpiring  = "package.expiring"    // 套餐临期
    NotifyTypeSystemAlert      = "system.alert"        // 系统通知
)

// 通知接收者类型
const (
    NotifyRecipientAdmin = "admin"  // 平台用户
    NotifyRecipientAgent = "agent"  // 代理用户(预留)
)

四、Model

// internal/model/notification.go

// Notification 站内消息模型
type Notification struct {
    ID            uint       `gorm:"column:id;primaryKey" json:"id"`
    RecipientID   uint       `gorm:"column:recipient_id;not null;index" json:"recipient_id"`
    RecipientType string     `gorm:"column:recipient_type;type:varchar(20);not null;default:'admin'" json:"recipient_type"`
    Type          string     `gorm:"column:type;type:varchar(50);not null" json:"type"`
    Title         string     `gorm:"column:title;type:varchar(200);not null" json:"title"`
    Body          string     `gorm:"column:body;type:text;not null;default:''" json:"body"`
    RefType       *string    `gorm:"column:ref_type;type:varchar(50)" json:"ref_type,omitempty"`
    RefID         *uint      `gorm:"column:ref_id" json:"ref_id,omitempty"`
    IsRead        bool       `gorm:"column:is_read;not null;default:false" json:"is_read"`
    ReadAt        *time.Time `gorm:"column:read_at" json:"read_at,omitempty"`
    CreatedAt     time.Time  `gorm:"column:created_at;not null" json:"created_at"`
    ExpiresAt     *time.Time `gorm:"column:expires_at" json:"expires_at,omitempty"`
}

func (Notification) TableName() string { return "tb_notification" }

五、发布侧NotificationPublisher

业务代码调这个发布通知,内部异步入队:

// internal/service/notification/publisher.go

// SendPayload 发送通知的参数
type SendPayload struct {
    RecipientIDs  []uint   // 接收人ID列表
    RecipientType string   // admin | agent
    Type          string   // 通知类型常量
    Title         string   // 标题
    Body          string   // 正文
    RefType       string   // 关联业务类型(可选)
    RefID         uint     // 关联业务ID可选
    ExpiresAt     *time.Time // 过期时间(可选)
}

// NotificationPublisher 通知发布器(非接口,简单具体实现)
type NotificationPublisher struct {
    queueClient *queue.Client
    logger      *zap.Logger
}

// Publish 发布通知(异步,不阻塞业务)
// 失败只记录日志,不影响业务事务
func (p *NotificationPublisher) Publish(ctx context.Context, payload SendPayload) {
    if err := p.queueClient.EnqueueTask(ctx, constants.TaskTypeNotification, payload); err != nil {
        p.logger.Error("通知入队失败", zap.Error(err), zap.String("type", payload.Type))
    }
}

业务代码调用示例(审批推进后通知下一审批人):

p.notifyPublisher.Publish(ctx, notification.SendPayload{
    RecipientIDs:  []uint{nextApproverID},
    RecipientType: constants.NotifyRecipientAdmin,
    Type:          constants.NotifyTypeApprovalPending,
    Title:         "您有一条待审批记录",
    Body:          fmt.Sprintf("代理「%s」提交了充值申请请及时审批。", shopName),
    RefType:       "approval",
    RefID:         approvalFlowID,
})

六、消费侧Asynq Task Handler

// internal/task/notification_handler.go

// HandleNotification 处理通知发送任务
func (h *NotificationHandler) HandleNotification(ctx context.Context, t *asynq.Task) error {
    var payload notification.SendPayload
    if err := sonic.Unmarshal(t.Payload(), &payload); err != nil {
        return fmt.Errorf("反序列化通知载荷失败: %w", err)
    }

    // 批量写入 tb_notification
    records := make([]model.Notification, 0, len(payload.RecipientIDs))
    for _, uid := range payload.RecipientIDs {
        ref_type := (*string)(nil)
        ref_id := (*uint)(nil)
        if payload.RefType != "" {
            ref_type = &payload.RefType
        }
        if payload.RefID != 0 {
            ref_id = &payload.RefID
        }
        records = append(records, model.Notification{
            RecipientID:   uid,
            RecipientType: payload.RecipientType,
            Type:          payload.Type,
            Title:         payload.Title,
            Body:          payload.Body,
            RefType:       ref_type,
            RefID:         ref_id,
            ExpiresAt:     payload.ExpiresAt,
        })
    }

    if err := h.db.WithContext(ctx).CreateInBatches(records, 100).Error; err != nil {
        return fmt.Errorf("批量写入通知失败: %w", err)
    }

    // Phase 2在此处加企微/短信调用
    // for _, sender := range h.extraSenders { sender.Send(ctx, payload) }

    return nil
}

七、API 设计

7.1 未读数量前端轮询用30秒一次

GET /admin/notifications/unread-count

响应:

{ "code": 0, "data": { "count": 5 } }

7.2 通知列表

GET /admin/notifications?is_read=false&type=approval.pending&page=1&page_size=20

请求参数:

type NotificationListRequest struct {
    IsRead *bool  `query:"is_read" description:"是否已读(不传=全部)"`
    Type   string `query:"type"    description:"通知类型过滤(可选)"`
    Page   int    `query:"page"    description:"页码"`
    PageSize int  `query:"page_size" description:"每页数量最大50"`
}

响应:

{
  "code": 0,
  "data": {
    "list": [
      {
        "id": 1,
        "type": "approval.pending",
        "title": "您有一条待审批记录",
        "body": "代理「XX店」提交了充值申请请及时审批。",
        "ref_type": "approval",
        "ref_id": 42,
        "is_read": false,
        "created_at": "2026-07-11T10:00:00Z"
      }
    ],
    "total": 3,
    "page": 1,
    "page_size": 20
  }
}

7.3 标记已读

PUT /admin/notifications/{id}/read

7.4 全部标记已读

PUT /admin/notifications/read-all

可传 type 过滤(只把某类型全部已读):

{ "type": "approval.pending" }

DTO

// internal/model/dto/notification_dto.go

type NotificationListRequest struct {
    IsRead   *bool  `query:"is_read"`
    Type     string `query:"type"`
    Page     int    `query:"page" default:"1"`
    PageSize int    `query:"page_size" default:"20"`
}

type NotificationItem struct {
    ID        uint       `json:"id"`
    Type      string     `json:"type" description:"通知类型"`
    Title     string     `json:"title"`
    Body      string     `json:"body"`
    RefType   *string    `json:"ref_type,omitempty"`
    RefID     *uint      `json:"ref_id,omitempty"`
    IsRead    bool       `json:"is_read"`
    ReadAt    *time.Time `json:"read_at,omitempty"`
    CreatedAt time.Time  `json:"created_at"`
}

type UnreadCountResponse struct {
    Count int64 `json:"count"`
}

type ReadAllRequest struct {
    Type string `json:"type" description:"通知类型(为空则全部已读)"`
}

八、前端对接

顶部导航栏铃铛

组件挂载 → 轮询 GET /admin/notifications/unread-count30秒一次
→ count > 0 时铃铛显示红点 + 数字
→ 点击铃铛 → 弹出通知抽屉 or 跳转 /notifications 页面
→ 打开时调 GET /admin/notifications?is_read=false
→ 点击某条通知 → PUT /admin/notifications/{id}/read → 根据 ref_type+ref_id 跳转对应业务页

跳转逻辑ref_type

ref_type 跳转页面
approval /approval/{ref_id} 审批详情
recharge /recharge/{ref_id} 充值单详情
refund /refund/{ref_id} 退款单详情
package /assets/{ref_id} 资产详情(临期提醒)

通知列表页(/notifications

筛选:通知类型(下拉)、已读状态
操作:全部已读按钮
列表字段:类型、标题、时间、已读状态
点击行:跳转关联业务详情


九、Phase 2 扩展预留

当需要接入企微通知时,只需在 HandleNotification 里追加:

// 企微通知Phase 2
if h.wecomClient != nil {
    for _, uid := range payload.RecipientIDs {
        wecomOpenID := h.userStore.GetWecomOpenID(ctx, uid)
        h.wecomClient.SendMessage(wecomOpenID, payload.Title, payload.Body)
    }
}

业务代码零修改Handler 里加一段即可。