cmd: two steps auto transfer

cmd/auto-transfer-products-to-farm/main.go

@@ -48,9 +48,13 @@ type commandOptions struct {
 	AllLocations            bool
 	FarmWarehouseOverrideID uint
 	SkipAmbiguous           bool
-	Output                  string
-	ActorID                 uint
-	RunID                   string
+	// FlagFilter is an optional set of product flag names (upper-cased).
+	// When non-empty only products that carry at least one of these flags are
+	// included. Populated from --flags="PAKAN,OVK".
+	FlagFilter []string
+	Output     string
+	ActorID    uint
+	RunID      string
 }
 
 // farmWarehouseEntry is a single LOKASI-type warehouse belonging to a location.
@@ -234,7 +238,7 @@ func main() {
 
 	// Step 3: load leftover stocks from extra farm warehouses that need
 	// consolidation into the chosen farm warehouse.
-	extraFarmStocks, err := loadExtraFarmLeftoverStocks(ctx, db, farmMap)
+	extraFarmStocks, err := loadExtraFarmLeftoverStocks(ctx, db, farmMap, opts)
 	if err != nil {
 		log.Fatalf("failed to load extra farm leftover stocks: %v", err)
 	}
@@ -276,10 +280,21 @@ func parseFlags() (*commandOptions, error) {
 		"When a location has multiple LOKASI warehouses, use this warehouse id as the chosen target. "+
 			"Stocks from the other LOKASI warehouses are also transferred to the chosen one. "+
 			"Requires --location-id or --location-name.")
+	var flagsRaw string
+	flag.StringVar(&flagsRaw, "flags", "",
+		"Comma-separated list of product flag names to include (e.g. PAKAN,OVK). "+
+			"Only products that carry at least one of these flags are transferred. "+
+			"Leave empty to transfer all products regardless of flags.")
 	flag.StringVar(&opts.Output, "output", outputModeTable, "Output format: table or json")
 	flag.UintVar(&opts.ActorID, "actor-id", 1, "Actor id used for created/deleted transfers")
 	flag.Parse()
 
+	for _, f := range strings.Split(flagsRaw, ",") {
+		if name := strings.ToUpper(strings.TrimSpace(f)); name != "" {
+			opts.FlagFilter = append(opts.FlagFilter, name)
+		}
+	}
+
 	opts.LocationName = strings.TrimSpace(opts.LocationName)
 	opts.RollbackRunID = strings.TrimSpace(opts.RollbackRunID)
 	opts.Output = strings.ToLower(strings.TrimSpace(opts.Output))
@@ -553,6 +568,7 @@ func loadKandangLeftoverStocks(ctx context.Context, db *gorm.DB, opts *commandOp
 		Order("l.name ASC, kw.name ASC, p.name ASC")
 
 	query = applyLocationFilter(query, opts, "kw")
+	query = applyFlagFilter(query, opts)
 
 	var rows []row
 	if err := query.Scan(&rows).Error; err != nil {
@@ -581,7 +597,7 @@ func loadKandangLeftoverStocks(ctx context.Context, db *gorm.DB, opts *commandOp
 // loadExtraFarmLeftoverStocks loads leftover stocks from every OtherFarm
 // warehouse in the map. These are LOKASI-type warehouses that will be
 // consolidated into the chosen farm warehouse when --farm-warehouse-id is used.
-func loadExtraFarmLeftoverStocks(ctx context.Context, db *gorm.DB, farmMap map[uint]farmWarehouseInfo) ([]kandangStockRow, error) {
+func loadExtraFarmLeftoverStocks(ctx context.Context, db *gorm.DB, farmMap map[uint]farmWarehouseInfo, opts *commandOptions) ([]kandangStockRow, error) {
 	// Collect extra farm warehouse IDs together with their location context.
 	type extraSource struct {
 		LocationID   uint
@@ -620,7 +636,7 @@ func loadExtraFarmLeftoverStocks(ctx context.Context, db *gorm.DB, farmMap map[u
 	}
 
 	var rows []row
-	err := db.WithContext(ctx).
+	q := db.WithContext(ctx).
 		Table("product_warehouses pw").
 		Select(`
 			fw.id            AS source_warehouse_id,
@@ -641,10 +657,9 @@ func loadExtraFarmLeftoverStocks(ctx context.Context, db *gorm.DB, farmMap map[u
 		Joins("JOIN warehouses fw ON fw.id = pw.warehouse_id AND fw.deleted_at IS NULL").
 		Joins("JOIN products p ON p.id = pw.product_id AND p.deleted_at IS NULL").
 		Where("fw.id IN ?", warehouseIDs).
-		Where("COALESCE(pw.qty, 0) > 0").
-		Order("fw.name ASC, p.name ASC").
-		Scan(&rows).Error
-	if err != nil {
+		Where("COALESCE(pw.qty, 0) > 0")
+	q = applyFlagFilter(q, opts)
+	if err := q.Order("fw.name ASC, p.name ASC").Scan(&rows).Error; err != nil {
 		return nil, err
 	}
 
@@ -949,6 +964,22 @@ func loadRollbackDetails(ctx context.Context, db *gorm.DB, runID string) ([]roll
 
 // ── Helpers ───────────────────────────────────────────────────────────────────
 
+// applyFlagFilter adds an EXISTS subquery that restricts results to products
+// carrying at least one flag from opts.FlagFilter. When the filter is empty
+// the query is returned unchanged so all products are included.
+func applyFlagFilter(q *gorm.DB, opts *commandOptions) *gorm.DB {
+	if len(opts.FlagFilter) == 0 {
+		return q
+	}
+	return q.Where(`EXISTS (
+		SELECT 1
+		FROM flags f
+		WHERE f.flagable_id   = p.id
+		  AND f.flagable_type = 'products'
+		  AND UPPER(f.name)   IN ?
+	)`, opts.FlagFilter)
+}
+
 func applyLocationFilter(q *gorm.DB, opts *commandOptions, tableAlias string) *gorm.DB {
 	if opts == nil {
 		return q

cmd/auto-transfer-products-to-farm/main_test.go

@@ -301,6 +301,33 @@ func TestBuildPlanSkipAmbiguousDowngradesErrorToSkipped(t *testing.T) {
 	}
 }
 
+// ── applyFlagFilter (unit-level, via buildTransferPlan) ───────────────────────
+
+// applyFlagFilter is a DB-level filter so we test its effect indirectly: the
+// flag filter is applied before rows reach buildTransferPlan, so we simulate
+// by only passing stock rows that the query would have returned.
+// The real guard is that loadKandangLeftoverStocks receives the filtered set.
+// Here we verify that buildTransferPlan itself is agnostic to the filter and
+// simply processes whatever rows it is given.
+func TestBuildPlanOnlyTransfersRowsPassedToIt(t *testing.T) {
+	opts := &commandOptions{RunID: "test-run", FlagFilter: []string{"PAKAN"}}
+	farmMap := map[uint]farmWarehouseInfo{
+		10: {LocationID: 10, AllFarm: []farmWarehouseEntry{{ID: 50, Name: "Farm A"}}, ChosenID: 50, ChosenName: "Farm A"},
+	}
+	// Simulate: only PAKAN products survived the DB filter; OVK was excluded.
+	stocks := []kandangStockRow{
+		{LocationID: 10, SourceWarehouseID: 20, ProductID: 1, ProductName: "Pakan Broiler", OnHandQty: 100, LeftoverQty: 100, SourceType: sourceTypeKandang},
+	}
+
+	_, groups := buildTransferPlan(opts, farmMap, stocks)
+	if len(groups) != 1 || len(groups[0].Rows) != 1 {
+		t.Fatalf("expected 1 group with 1 row, got %d groups", len(groups))
+	}
+	if groups[0].Rows[0].ProductName != "Pakan Broiler" {
+		t.Errorf("unexpected product: %s", groups[0].Rows[0].ProductName)
+	}
+}
+
 // ── buildTransferPlan — farm_consolidation source ────────────────────────────
 
 func TestBuildPlanFarmConsolidationCreatesOwnGroup(t *testing.T) {