break
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225 lines
8.6 KiB
Go
225 lines
8.6 KiB
Go
// Package notification 提供当前接收人的 PostgreSQL 站内通知读取投影。
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package notification
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import (
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"context"
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"strconv"
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"strings"
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"time"
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"gorm.io/gorm"
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"github.com/break/junhong_cmp_fiber/internal/model"
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"github.com/break/junhong_cmp_fiber/internal/model/dto"
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"github.com/break/junhong_cmp_fiber/pkg/constants"
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"github.com/break/junhong_cmp_fiber/pkg/errors"
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)
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// Query 提供后台账号未读数和基础列表查询。
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type Query struct {
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db *gorm.DB
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now func() time.Time
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}
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// NewQuery 创建后台通知查询。
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func NewQuery(db *gorm.DB) *Query {
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return &Query{db: db, now: time.Now}
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}
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// UnreadCount 从 PostgreSQL 查询当前后台账号的准确未读数。
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func (q *Query) UnreadCount(ctx context.Context, recipientID uint) (*dto.NotificationUnreadCountResponse, error) {
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if recipientID == 0 {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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var count int64
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now := q.now().UTC()
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err := q.db.WithContext(ctx).Model(&model.Notification{}).
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Where("recipient_kind = ? AND recipient_id = ? AND is_read = ? AND (expires_at IS NULL OR expires_at > ?)",
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constants.NotificationRecipientKindAccount, recipientID, false, now).
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Count(&count).Error
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if err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询通知未读数失败")
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}
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return newUnreadCountResponse(count), nil
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}
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// List 按创建时间和 ID 倒序查询当前后台账号的未过期通知。
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func (q *Query) List(ctx context.Context, recipientID uint, request dto.NotificationListRequest) (*dto.NotificationListResponse, error) {
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if recipientID == 0 {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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page, pageSize, offset, err := normalizeNotificationPagination(request.Page, request.PageSize)
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if err != nil {
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return nil, err
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}
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if !isNotificationCategory(request.Category) || !isNotificationSeverity(request.Severity) || len(request.Type) > 100 || strings.TrimSpace(request.Type) != request.Type {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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now := q.now().UTC()
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base := q.db.WithContext(ctx).Model(&model.Notification{}).
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Where("recipient_kind = ? AND recipient_id = ? AND (expires_at IS NULL OR expires_at > ?)",
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constants.NotificationRecipientKindAccount, recipientID, now)
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if request.Category != "" {
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base = base.Where("category = ?", request.Category)
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}
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if request.Type != "" {
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base = base.Where("type = ?", request.Type)
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}
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if request.Severity != "" {
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base = base.Where("severity = ?", request.Severity)
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}
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if request.IsRead != nil {
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base = base.Where("is_read = ?", *request.IsRead)
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}
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var total int64
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if err := base.Count(&total).Error; err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询通知总数失败")
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}
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var records []model.Notification
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if err := base.Order("created_at DESC, id DESC").Offset(offset).Limit(pageSize).Find(&records).Error; err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询通知列表失败")
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}
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items := make([]dto.NotificationItem, 0, len(records))
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for _, record := range records {
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items = append(items, dto.NotificationItem{
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ID: record.ID, Category: record.Category, Type: record.Type, Severity: record.Severity,
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Title: record.Title, Body: record.Body, RefType: record.RefType, RefID: record.RefID,
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RefKey: record.RefKey, IsRead: record.IsRead, ReadAt: record.ReadAt, CreatedAt: record.CreatedAt,
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})
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}
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return &dto.NotificationListResponse{Items: items, Total: total, Page: page, Size: pageSize}, nil
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}
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// PersonalUnreadCount 查询当前个人客户可见业务通知的准确未读数。
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func (q *Query) PersonalUnreadCount(ctx context.Context, customerID uint) (*dto.NotificationUnreadCountResponse, error) {
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if customerID == 0 {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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var count int64
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err := personalNotificationScope(q.db.WithContext(ctx).Model(&model.Notification{}), customerID, q.now().UTC()).
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Where("is_read = ?", false).
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Count(&count).Error
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if err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询个人客户通知未读数失败")
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}
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return newUnreadCountResponse(count), nil
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}
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// PersonalList 查询当前个人客户可见的未过期业务通知简化列表。
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func (q *Query) PersonalList(ctx context.Context, customerID uint, request dto.PersonalNotificationListRequest) (*dto.PersonalNotificationListResponse, error) {
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if customerID == 0 {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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page, pageSize, offset, err := normalizeNotificationPagination(request.Page, request.PageSize)
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if err != nil {
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return nil, err
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}
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base := personalNotificationScope(q.db.WithContext(ctx).Model(&model.Notification{}), customerID, q.now().UTC())
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if request.IsRead != nil {
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base = base.Where("is_read = ?", *request.IsRead)
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}
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var total int64
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if err := base.Count(&total).Error; err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询个人客户通知总数失败")
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}
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var records []model.Notification
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if err := base.Order("created_at DESC, id DESC").Offset(offset).Limit(pageSize).Find(&records).Error; err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询个人客户通知列表失败")
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}
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return &dto.PersonalNotificationListResponse{
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Items: notificationItems(records), Total: total, Page: page, Size: pageSize,
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}, nil
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}
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// UnreadSummary 使用单条 PostgreSQL 查询返回当前后台账号的固定分类汇总。
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func (q *Query) UnreadSummary(ctx context.Context, recipientID uint) (*dto.NotificationUnreadSummaryResponse, error) {
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if recipientID == 0 {
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return nil, errors.New(errors.CodeInvalidParam)
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}
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var summary dto.NotificationUnreadSummaryResponse
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err := q.db.WithContext(ctx).Model(&model.Notification{}).
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Select(`COUNT(*) AS total,
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COUNT(*) FILTER (WHERE category = ?) AS approval,
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COUNT(*) FILTER (WHERE category = ?) AS expiry,
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COUNT(*) FILTER (WHERE category = ?) AS sync,
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COUNT(*) FILTER (WHERE category = ?) AS system`,
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constants.NotificationCategoryApproval,
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constants.NotificationCategoryExpiry,
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constants.NotificationCategorySync,
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constants.NotificationCategorySystem).
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Where("recipient_kind = ? AND recipient_id = ? AND is_read = ? AND (expires_at IS NULL OR expires_at > ?)",
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constants.NotificationRecipientKindAccount, recipientID, false, q.now().UTC()).
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Scan(&summary).Error
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if err != nil {
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return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询通知未读汇总失败")
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}
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return &summary, nil
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}
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func isNotificationCategory(category string) bool {
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switch category {
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case "", constants.NotificationCategoryApproval, constants.NotificationCategoryExpiry,
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constants.NotificationCategorySync, constants.NotificationCategorySystem:
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return true
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default:
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return false
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}
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}
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func isNotificationSeverity(severity string) bool {
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switch severity {
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case "", constants.NotificationSeverityInfo, constants.NotificationSeverityWarning,
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constants.NotificationSeverityError, constants.NotificationSeverityCritical:
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return true
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default:
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return false
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}
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}
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func normalizeNotificationPagination(page, pageSize int) (int, int, int, error) {
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if page <= 0 {
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page = 1
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}
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if page > constants.NotificationMaxPage {
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return 0, 0, 0, errors.New(errors.CodeInvalidParam)
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}
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if pageSize <= 0 {
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pageSize = constants.NotificationDefaultPageSize
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}
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if pageSize > constants.NotificationMaxPageSize {
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return 0, 0, 0, errors.New(errors.CodeInvalidParam)
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}
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return page, pageSize, (page - 1) * pageSize, nil
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}
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func personalNotificationScope(db *gorm.DB, customerID uint, now time.Time) *gorm.DB {
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return db.Where(`recipient_kind = ? AND recipient_id = ?
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AND category IN ? AND type IN ? AND (expires_at IS NULL OR expires_at > ?)`,
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constants.NotificationRecipientKindPersonalCustomer,
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customerID,
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[]string{constants.NotificationCategoryApproval, constants.NotificationCategoryExpiry, constants.NotificationCategorySystem},
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[]string{constants.NotificationTypePackageExpiring, constants.NotificationTypeExchangeShippingCreated},
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now,
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)
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}
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func newUnreadCountResponse(count int64) *dto.NotificationUnreadCountResponse {
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displayCount := strconv.FormatInt(count, 10)
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if count > 99 {
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displayCount = "99+"
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}
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return &dto.NotificationUnreadCountResponse{Count: count, DisplayCount: displayCount}
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}
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func notificationItems(records []model.Notification) []dto.NotificationItem {
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items := make([]dto.NotificationItem, 0, len(records))
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for _, record := range records {
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items = append(items, dto.NotificationItem{
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ID: record.ID, Category: record.Category, Type: record.Type, Severity: record.Severity,
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Title: record.Title, Body: record.Body, RefType: record.RefType, RefID: record.RefID,
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RefKey: record.RefKey, IsRead: record.IsRead, ReadAt: record.ReadAt, CreatedAt: record.CreatedAt,
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})
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}
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return items
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}
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