新功能(#74): 新增促销系统模型层

Co-authored-by: multica-agent <github@multica.ai>

internal/model/subscribe_promo/model.go

@@ -0,0 +1,84 @@
+package subscribe_promo
+
+import (
+	"context"
+	"time"
+
+	"github.com/perfect-panel/server/internal/model/promo_rule"
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+)
+
+type RulePromo struct {
+	Id          int64
+	SubscribeId int64
+	PromoRuleId int64
+	PromoPrice  int64
+	RuleName    string
+	RuleType    string
+	Params      promo_rule.JSONRawMessage
+	Priority    int64
+	StartTime   *time.Time
+	EndTime     *time.Time
+}
+
+type customSubscribePromoLogicModel interface {
+	FindOneBySubscribeAndRule(ctx context.Context, subscribeId, promoRuleId int64) (*SubscribePromo, error)
+	FindBySubscribeId(ctx context.Context, subscribeId int64) ([]*SubscribePromo, error)
+	FindByPromoRuleId(ctx context.Context, promoRuleId int64) ([]*SubscribePromo, error)
+	QueryEnabledBySubscribeId(ctx context.Context, subscribeId int64) ([]*RulePromo, error)
+}
+
+func NewModel(conn *gorm.DB, c *redis.Client) Model {
+	return &customSubscribePromoModel{
+		defaultSubscribePromoModel: newSubscribePromoModel(conn, c),
+	}
+}
+
+func (m *customSubscribePromoModel) FindOneBySubscribeAndRule(ctx context.Context, subscribeId, promoRuleId int64) (*SubscribePromo, error) {
+	var resp SubscribePromo
+	err := m.QueryNoCacheCtx(ctx, &resp, func(conn *gorm.DB, v interface{}) error {
+		return conn.Model(&SubscribePromo{}).
+			Where("subscribe_id = ? AND promo_rule_id = ?", subscribeId, promoRuleId).
+			First(v).Error
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+func (m *customSubscribePromoModel) FindBySubscribeId(ctx context.Context, subscribeId int64) ([]*SubscribePromo, error) {
+	var list []*SubscribePromo
+	err := m.QueryNoCacheCtx(ctx, &list, func(conn *gorm.DB, v interface{}) error {
+		return conn.Model(&SubscribePromo{}).
+			Where("subscribe_id = ?", subscribeId).
+			Order("id DESC").
+			Find(v).Error
+	})
+	return list, err
+}
+
+func (m *customSubscribePromoModel) FindByPromoRuleId(ctx context.Context, promoRuleId int64) ([]*SubscribePromo, error) {
+	var list []*SubscribePromo
+	err := m.QueryNoCacheCtx(ctx, &list, func(conn *gorm.DB, v interface{}) error {
+		return conn.Model(&SubscribePromo{}).
+			Where("promo_rule_id = ?", promoRuleId).
+			Order("id DESC").
+			Find(v).Error
+	})
+	return list, err
+}
+
+func (m *customSubscribePromoModel) QueryEnabledBySubscribeId(ctx context.Context, subscribeId int64) ([]*RulePromo, error) {
+	var list []*RulePromo
+	err := m.QueryNoCacheCtx(ctx, &list, func(conn *gorm.DB, v interface{}) error {
+		return conn.Table("subscribe_promo AS sp").
+			Select("sp.id, sp.subscribe_id, sp.promo_rule_id, sp.promo_price, pr.name AS rule_name, pr.type AS rule_type, pr.params, pr.priority, pr.start_time, pr.end_time").
+			Joins("JOIN promo_rule AS pr ON pr.id = sp.promo_rule_id AND pr.deleted_at IS NULL").
+			Where("sp.subscribe_id = ? AND pr.enabled = ?", subscribeId, true).
+			Order("pr.priority DESC, pr.id DESC").
+			Scan(v).Error
+	})
+	return list, err
+}