feat: add component_types management functionality

internal/mapper/component_type_mapper.go

@@ -0,0 +1,50 @@
+package mapper
+
+import (
+	"wm-backend/internal/models"
+	db "wm-backend/sqlc_gen"
+
+	"encoding/json"
+
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+func ToDomainComponentType(r db.ComponentType) *models.ComponentType {
+	return &models.ComponentType{
+		ID:          r.ID,
+		Name:        r.Name,
+		Description: r.Description.String,
+		Metadata:    json.RawMessage(r.Metadata),
+		CreatedAt:   r.CreatedAt,
+		UpdatedAt:   r.UpdatedAt,
+	}
+}
+
+func ToModelComponentType(r *models.ComponentType) *db.CreateComponentTypeParams {
+	return &db.CreateComponentTypeParams{
+		Name: r.Name,
+		Description: pgtype.Text{
+			String: r.Description,
+			Valid:  r.Description != "",
+		},
+		Metadata:  []byte(r.Metadata),
+		CreatedAt: r.CreatedAt,
+	}
+}
+
+func ToUpdateModelComponentType(r *models.ComponentType) *db.UpdateComponentTypeParams {
+	var metadata []byte
+	if len(r.Metadata) > 0 {
+		metadata = []byte(r.Metadata)
+	}
+	return &db.UpdateComponentTypeParams{
+		Name: r.Name,
+		Description: pgtype.Text{
+			String: r.Description,
+			Valid:  r.Description != "",
+		},
+		Metadata:  metadata,
+		UpdatedAt: r.UpdatedAt,
+		ID:        r.ID,
+	}
+}