feat: add container management functionality

internal/mapper/container_mapper.go

@@ -0,0 +1,61 @@
+package mapper
+
+import (
+	"wm-backend/internal/models"
+	db "wm-backend/sqlc_gen"
+
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+func ToDomainContainer(r db.Container) *models.Container {
+	return &models.Container{
+		ID:            r.ID,
+		ShelfID:       r.ShelfID,
+		Name:          r.Name,
+		ContainerType: string(r.ContainerType),
+		Description:   r.Description.String,
+		MaxCapacity:   r.MaxCapacity.Int32,
+		Metadata:      r.Metadata,
+		CreatedAt:     r.CreatedAt,
+		UpdatedAt:     r.UpdatedAt,
+	}
+}
+
+func ToModelContainer(r *models.Container) *db.CreateContainerParams {
+	return &db.CreateContainerParams{
+		ShelfID:       r.ShelfID,
+		Name:          r.Name,
+		ContainerType: db.ContainerTypeEnum(r.ContainerType),
+		Description: pgtype.Text{
+			String: r.Description,
+			Valid:  r.Description != "",
+		},
+		MaxCapacity: pgtype.Int4{
+			Int32: r.MaxCapacity,
+			Valid: r.MaxCapacity != 0,
+		},
+		Metadata:  r.Metadata,
+		CreatedAt: r.CreatedAt,
+	}
+}
+
+func ToUpdateModelContainer(r *models.Container) *db.UpdateContainerParams {
+	return &db.UpdateContainerParams{
+		Name:          r.Name,
+		ContainerType: db.NullContainerTypeEnum{
+			ContainerTypeEnum: db.ContainerTypeEnum(r.ContainerType),
+			Valid:             r.ContainerType != "",
+		},
+		Description: pgtype.Text{
+			String: r.Description,
+			Valid:  r.Description != "",
+		},
+		MaxCapacity: pgtype.Int4{
+			Int32: r.MaxCapacity,
+			Valid: r.MaxCapacity != 0,
+		},
+		Metadata:  r.Metadata,
+		UpdatedAt: r.UpdatedAt,
+		ID:        r.ID,
+	}
+}