feat(banner): 首页常驻滚动通知与管理配置及类型样式支持

backend/internal/repository/announcement.go

@@ -1,6 +1,7 @@
 package repository
 
 import (
+	"encoding/json"
 	"strings"
 	"time"
 
@@ -77,3 +78,108 @@ func (r *Repository) MarkAnnouncementsRead(userID string, announcementIDs []stri
 	}
 	return r.db.Clauses(clause.OnConflict{Columns: []clause.Column{{Name: "user_id"}, {Name: "announcement_id"}}, DoNothing: true}).Create(&reads).Error
 }
+
+func (r *Repository) ActiveBannerAnnouncements(now time.Time) ([]model.BannerAnnouncement, error) {
+	var banners []model.BannerAnnouncement
+	err := r.db.Model(&model.BannerAnnouncement{}).
+		Where("status = ?", "active").
+		Where("starts_at IS NULL OR starts_at <= ?", now).
+		Where("ends_at IS NULL OR ends_at >= ?", now).
+		Order("created_at desc").
+		Find(&banners).Error
+	decodeBannerTitleRuns(banners)
+	return banners, err
+}
+
+func (r *Repository) AdminBannerAnnouncements(keyword string, status string, limit int, offset int) ([]model.BannerAnnouncement, int64, error) {
+	var banners []model.BannerAnnouncement
+	var total int64
+	query := r.db.Model(&model.BannerAnnouncement{})
+	if k := strings.TrimSpace(keyword); k != "" {
+		query = query.Where("title LIKE ?", "%"+k+"%")
+	}
+	if status == "active" || status == "disabled" {
+		query = query.Where("status = ?", status)
+	}
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+	if err := query.Order("created_at desc").Limit(limit).Offset(offset).Find(&banners).Error; err != nil {
+		return nil, 0, err
+	}
+	decodeBannerTitleRuns(banners)
+	return banners, total, nil
+}
+
+func (r *Repository) BannerAnnouncement(id string) (*model.BannerAnnouncement, error) {
+	var banner model.BannerAnnouncement
+	if err := r.db.First(&banner, "id = ?", id).Error; err != nil {
+		return nil, err
+	}
+	banner.TitleRuns = bannerTitleRunsFromJSON(banner.TitleRunsJSON)
+	return &banner, nil
+}
+
+// encodeBannerTitleRuns 把样式分段写入 title_runs 文本列；无分段时写空串，与「纯文本标题」区分。
+func encodeBannerTitleRuns(banner *model.BannerAnnouncement) error {
+	if len(banner.TitleRuns) == 0 {
+		banner.TitleRunsJSON = ""
+		return nil
+	}
+	encoded, err := json.Marshal(banner.TitleRuns)
+	if err != nil {
+		return err
+	}
+	banner.TitleRunsJSON = string(encoded)
+	return nil
+}
+
+// decodeBannerTitleRuns 回填列表项的样式分段。
+func decodeBannerTitleRuns(banners []model.BannerAnnouncement) {
+	for index := range banners {
+		banners[index].TitleRuns = bannerTitleRunsFromJSON(banners[index].TitleRunsJSON)
+	}
+}
+
+// bannerTitleRunsFromJSON 解析 title_runs 列文本；空值或内容损坏时返回 nil，降级为纯文本标题，不阻断通知条展示。
+func bannerTitleRunsFromJSON(raw string) []model.BannerTitleRun {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil
+	}
+	var runs []model.BannerTitleRun
+	if err := json.Unmarshal([]byte(raw), &runs); err != nil {
+		return nil
+	}
+	return runs
+}
+
+func (r *Repository) CreateBannerAnnouncement(banner *model.BannerAnnouncement) error {
+	if err := encodeBannerTitleRuns(banner); err != nil {
+		return err
+	}
+	return r.db.Create(banner).Error
+}
+
+func (r *Repository) UpdateBannerAnnouncement(banner *model.BannerAnnouncement) error {
+	if err := encodeBannerTitleRuns(banner); err != nil {
+		return err
+	}
+	updates := map[string]any{
+		"title":       banner.Title,
+		"title_runs":  banner.TitleRunsJSON,
+		"notice_type": banner.NoticeType,
+		"link":        banner.Link,
+		"status":      banner.Status,
+		"updated_at":  banner.UpdatedAt,
+		"starts_at":   banner.StartsAt,
+		"ends_at":     banner.EndsAt,
+	}
+	return r.db.Model(&model.BannerAnnouncement{}).
+		Where("id = ?", banner.ID).
+		Updates(updates).Error
+}
+
+func (r *Repository) DeleteBannerAnnouncement(id string) error {
+	return r.db.Where("id = ?", id).Delete(&model.BannerAnnouncement{}).Error
+}