Refine vendor mapping CSV operations and ignore import flow

internal/handlers/pricing.go

@@ -1413,17 +1413,19 @@ func (h *PricingHandler) ImportVendorMappingsCSV(c *gin.Context) {
 	vendorIdx := findHeader("vendor", "вендор", "поставщик")
 	partnumberIdx := findHeader("partnumber", "part_number", "pn", "партномер", "артикул")
 	lotIdx := findHeader("lot_name", "lot", "лот", "наименование_lot")
-	descIdx := findHeader("description", "desc", "описание", "comment", "комментарий")
+		descIdx := findHeader("description", "desc", "описание", "comment", "комментарий")
+		ignoreIdx := findHeader("ignore", "ignored", "игнор", "ignore_flag")
 
 	startRow := 1
 	if partnumberIdx < 0 || lotIdx < 0 {
-		// Fallback: no header row, assume fixed order vendor;partnumber;lot_name;description
-		vendorIdx, partnumberIdx, lotIdx, descIdx = 0, 1, 2, 3
-		startRow = 0
-	}
+			// Fallback: no header row, assume fixed order vendor;partnumber;lot_name;description;ignore
+			vendorIdx, partnumberIdx, lotIdx, descIdx, ignoreIdx = 0, 1, 2, 3, 4
+			startRow = 0
+		}
 
-	imported := 0
-	skipped := 0
+		imported := 0
+		ignoredCnt := 0
+		skipped := 0
 	errs := make([]string, 0, 10)
 
 	field := func(rec []string, idx int) string {
@@ -1437,23 +1439,32 @@ func (h *PricingHandler) ImportVendorMappingsCSV(c *gin.Context) {
 		rec := rows[i]
 		vendor := field(rec, vendorIdx)
 		partnumber := field(rec, partnumberIdx)
-		lotName := field(rec, lotIdx)
-		description := field(rec, descIdx)
+			lotName := field(rec, lotIdx)
+			description := field(rec, descIdx)
+			ignoreRaw := field(rec, ignoreIdx)
 
 		// Skip empty lines.
-		if vendor == "" && partnumber == "" && lotName == "" && description == "" {
-			skipped++
-			continue
-		}
-		if partnumber == "" {
+			if vendor == "" && partnumber == "" && lotName == "" && description == "" && ignoreRaw == "" {
+				skipped++
+				continue
+			}
+			if partnumber == "" {
 			errs = append(errs, fmt.Sprintf("row %d: partnumber is required", i+1))
 			continue
 		}
-		if lotName == "" {
-			errs = append(errs, fmt.Sprintf("row %d: lot_name is required", i+1))
-			continue
-		}
-		if err := h.vendorMapService.UpsertMapping(vendor, partnumber, lotName, description, nil); err != nil {
+			if lotName == "" {
+				if strings.TrimSpace(ignoreRaw) != "" {
+					if err := h.vendorMapService.SetIgnore(vendor, partnumber, h.dbUsername, true); err != nil {
+						errs = append(errs, fmt.Sprintf("row %d: ignore failed: %v", i+1, err))
+						continue
+					}
+					ignoredCnt++
+					continue
+				}
+				errs = append(errs, fmt.Sprintf("row %d: lot_name is required (or set Ignore)", i+1))
+				continue
+			}
+			if err := h.vendorMapService.UpsertMapping(vendor, partnumber, lotName, description, nil); err != nil {
 			errs = append(errs, fmt.Sprintf("row %d: %v", i+1, err))
 			continue
 		}
@@ -1465,6 +1476,7 @@ func (h *PricingHandler) ImportVendorMappingsCSV(c *gin.Context) {
 			"error":   "import failed",
 			"errors":  errs,
 			"imported": imported,
+			"ignored":  ignoredCnt,
 			"skipped": skipped,
 		})
 		return
@@ -1472,12 +1484,67 @@ func (h *PricingHandler) ImportVendorMappingsCSV(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{
 		"message":   "import completed",
 		"imported":  imported,
+		"ignored":   ignoredCnt,
 		"skipped":   skipped,
 		"errors":    errs,
 		"hasErrors": len(errs) > 0,
 	})
 }
 
+func (h *PricingHandler) ExportUnmappedVendorMappingsCSV(c *gin.Context) {
+	if h.vendorMapService == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{
+			"error":   "Глобальные сопоставления доступны только в онлайн режиме",
+			"offline": true,
+		})
+		return
+	}
+
+	filename := fmt.Sprintf("vendor_mappings_unmapped_%s.csv", time.Now().Format("20060102_150405"))
+	c.Header("Content-Type", "text/csv; charset=utf-8")
+	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filename))
+	c.Status(http.StatusOK)
+	_, _ = c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})
+
+	w := csv.NewWriter(c.Writer)
+	w.Comma = ';'
+	if err := w.Write([]string{"vendor", "partnumber", "lot_name", "description", "ignore"}); err != nil {
+		c.String(http.StatusInternalServerError, "export failed: %v", err)
+		return
+	}
+
+	page := 1
+	perPage := 500
+	for {
+		items, total, err := h.vendorMapService.List(page, perPage, "", true, false)
+		if err != nil {
+			c.String(http.StatusInternalServerError, "export failed: %v", err)
+			return
+		}
+		for _, it := range items {
+			if err := w.Write([]string{
+				strings.TrimSpace(it.Vendor),
+				strings.TrimSpace(it.Partnumber),
+				"", // to be filled by user
+				strings.TrimSpace(it.Description),
+				"", // optional ignore marker
+			}); err != nil {
+				c.String(http.StatusInternalServerError, "export failed: %v", err)
+				return
+			}
+		}
+		w.Flush()
+		if err := w.Error(); err != nil {
+			c.String(http.StatusInternalServerError, "export failed: %v", err)
+			return
+		}
+		if int64(page*perPage) >= total || len(items) == 0 {
+			break
+		}
+		page++
+	}
+}
+
 func (h *PricingHandler) IgnoreVendorMapping(c *gin.Context) {
 	if h.vendorMapService == nil {
 		c.JSON(http.StatusServiceUnavailable, gin.H{