feat: 支持人工修改蝦皮规格 (#215)

admin/service/shopee_sku.go

@@ -0,0 +1,102 @@
+package service
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+	"unicode/utf8"
+
+	"cmautobuy/admin/model"
+	"cmautobuy/admin/repository"
+)
+
+const maxShopeeSKUFieldRunes = 500
+
+// UpdateShopeeSKUManual 保存采购员对现有蝦皮规格的人工修正。
+// 只修改颜色、尺码和建议说明；规格原文、身份字段和既有采购数据保持不变。
+func UpdateShopeeSKUManual(db *sql.DB, actor *model.User, goodsID, skuRecordID,
+	color, size, advice string, now time.Time) error {
+	if actor == nil || actor.Status != model.UserActive {
+		return ErrUnauthenticated
+	}
+	goodsID = strings.TrimSpace(goodsID)
+	skuRecordID = strings.TrimSpace(skuRecordID)
+	color = strings.TrimSpace(color)
+	size = strings.TrimSpace(size)
+	advice = strings.TrimSpace(advice)
+	if goodsID == "" {
+		return invalidFieldInput("shopee_goods_id", "蝦皮商品编号不能为空")
+	}
+	if skuRecordID == "" {
+		return invalidFieldInput("sku_record_id", "蝦皮规格记录编号不能为空")
+	}
+	if color == "" {
+		return invalidFieldInput("color", "颜色不能为空")
+	}
+	if size == "" {
+		return invalidFieldInput("size", "尺码不能为空")
+	}
+	for _, field := range []struct {
+		name, label, value string
+	}{{"color", "颜色", color}, {"size", "尺码", size}, {"advice", "建议说明", advice}} {
+		if utf8.RuneCountInString(field.value) > maxShopeeSKUFieldRunes {
+			return invalidFieldInput(field.name, "%s最多 500 个字符", field.label)
+		}
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	state, err := repository.GetShopeeSKUManualState(tx, skuRecordID)
+	if err != nil {
+		return err
+	}
+	if state == nil || state.GoodsID != goodsID {
+		return invalidFieldInput("sku_record_id", "蝦皮规格不存在或不属于当前商品，请刷新页面后重试")
+	}
+	sources, err := decodeShopeeSKUProvenance(state.FieldSources)
+	if err != nil {
+		return fmt.Errorf("读取蝦皮规格字段来源失败: %w", err)
+	}
+	observedTimes, err := decodeShopeeSKUProvenance(state.FieldObservedAt)
+	if err != nil {
+		return fmt.Errorf("读取蝦皮规格字段时间失败: %w", err)
+	}
+	at := now.UTC().Format(model.TimeLayout)
+	for _, field := range []string{"color", "size", "advice"} {
+		sources[field] = "manual"
+		observedTimes[field] = at
+	}
+	sourcesJSON, err := json.Marshal(sources)
+	if err != nil {
+		return err
+	}
+	timesJSON, err := json.Marshal(observedTimes)
+	if err != nil {
+		return err
+	}
+	updated, err := repository.UpdateShopeeSKUManualFields(tx, skuRecordID, goodsID,
+		color, size, advice, string(sourcesJSON), string(timesJSON), at)
+	if err != nil {
+		return err
+	}
+	if !updated {
+		return invalidFieldInput("sku_record_id", "蝦皮规格已发生变化，请刷新页面后重试")
+	}
+	return tx.Commit()
+}
+
+func decodeShopeeSKUProvenance(raw string) (map[string]string, error) {
+	values := map[string]string{}
+	if strings.TrimSpace(raw) == "" {
+		return values, nil
+	}
+	if err := json.Unmarshal([]byte(raw), &values); err != nil {
+		return nil, err
+	}
+	return values, nil
+}