Produkte und Properties im Server

buildtime/server/README.md

@@ -72,7 +72,7 @@ CREATE TABLE tabelle_a (
 
     - updateValueFromValueId
 
-    - add
+    - addValueToPropertyType
 
 - Produkte haben zusätzlich zur ID, Label und Beschreibung noch eine externalId.  
 
@@ -107,7 +107,7 @@ CREATE TABLE IF NOT EXISTS values (
     id BIGINT PRIMARY KEY DEFAULT nextval('global_id_seq'),
     Label TEXT,
     description TEXT,
-    propertyId BIGINT
+    propertyGroupId BIGINT
 );
 
 -- Property Table
@@ -163,11 +163,8 @@ CREATE TABLE IF NOT EXISTS media (
     mediaType TEXT,
     externalId BIGINT
 );
-
 ```
 
-
-
 ## Open Aufsetzen des Source Codes:
 
 ````
@@ -218,4 +215,47 @@ go get github.com/gin-contrib/cors
 
 ## Server API
 
-Die Server-API baut auf HTTP und auf REST auf. Antworten werden im JSON Format gesendet,ebenso, wie neu anzulegende Daten oder zu aktualisierende Daten.
+Die Server-API baut auf HTTP und auf REST auf. Antworten werden im JSON Format gesendet,ebenso, wie neu anzulegende Daten oder zu aktualisierende Daten.
+
+Generell werden Daten im JSON Format ausgetauscht. Z.B. wird ein *Value* Objekt in From von *application/json Daten* übergeben:
+
+```gettext
+put: http://server:port/updatePropertyType
+```
+
+benötigt folgende Struktur im Anfragekörper:
+
+```json
+{
+  "id": 1000003,
+  "label": "Colour",
+  "description": "System wide colors",
+  "propertyTypeGroupId": 100002
+}
+```
+
+und liefert als Ergebnis (wenn kein Fehler auftritt):
+
+```json
+{
+  "data": {
+    "id": 1000003,
+    "label": "Colour",
+    "description": "System wide colors",
+    "propertyTypeGroupId": 100002
+  },
+  "message": "PropertyType updated"
+}
+```
+
+Wenn Daten zurückkommen, so wie hier im Beispiel, dann werden sie im *"data"* Tag geschrieben. Meistens kommt auch noch eine Nachricht mit, die in *"message"* steht.
+
+ Im Falle eines Fehler kommt eine entsprechende Nachricht zurück (z.B. wenn es keinen PropertyType mit der entsprechenden *ID* gibt):
+
+```json
+{
+  "error": "sql: no rows in result set"
+}
+```
+
+### Value und Property Funktionen

buildtime/server/controller/productController.go

@@ -0,0 +1,142 @@
+package controller
+
+import (
+	"net/http"
+	"simplycpq/models"
+	"simplycpq/services"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+type ProductController struct {
+	productService      *services.ProductService
+	productGroupService *services.ProductGroupService
+	valueService        *services.ValueService
+}
+
+func NewProductController(productService *services.ProductService, productGroupService *services.ProductGroupService, valueService *services.ValueService) *ProductController {
+	return &ProductController{
+		productService:      productService,
+		productGroupService: productGroupService,
+		valueService:        valueService,
+	}
+}
+
+func (pc *ProductController) CreateProduct(c *gin.Context) {
+	var product models.Product
+	if err := c.ShouldBindJSON(&product); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	createdProduct, err := pc.productService.CreateProduct(&product)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "product created successfully", "data": createdProduct})
+}
+
+func (pc *ProductController) UpdateProduct(c *gin.Context) {
+	var product models.Product
+	if err := c.ShouldBindJSON(&product); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	if err := pc.productService.UpdateProduct(&product); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "product updated successfully"})
+}
+
+func (pc *ProductController) DeleteProduct(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid product id"})
+		return
+	}
+	if err := pc.productService.DeleteProduct(id); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "product deleted successfully"})
+}
+
+func (pc *ProductController) GetProduct(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid product id"})
+		return
+	}
+	product, err := pc.productService.GetProductById(id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "product retrieved successfully", "product": product})
+}
+
+func (pc *ProductController) GetProductsByGroupId(c *gin.Context) {
+	groupId, err := strconv.Atoi(c.Param("groupId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid group id"})
+		return
+	}
+	products, err := pc.productService.GetProductsByGroupId(groupId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "products retrieved successfully", "groupId": groupId, "products": products})
+}
+
+func (pc *ProductController) AddPropertyToProductId(c *gin.Context) {
+	productId, err := strconv.Atoi(c.Param("productId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid product id"})
+		return
+	}
+	propertyId, err := strconv.Atoi(c.Param("propertyId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid property id"})
+		return
+	}
+	if err := pc.productService.AddPropertyToProduct(productId, propertyId); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "property added to product successfully", "productId": productId, "propertyId": propertyId})
+}
+
+func (pc *ProductController) DeletePropertyFromProductId(c *gin.Context) {
+	productId, err := strconv.Atoi(c.Param("productId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid product id"})
+		return
+	}
+	propertyId, err := strconv.Atoi(c.Param("propertyId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid property id"})
+		return
+	}
+	if err := pc.productService.DeletePropertyFromProduct(productId, propertyId); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "property deleted from product successfully", "productId": productId, "propertyId": propertyId})
+}
+
+func (pc *ProductController) GetPropertiesFromProductId(c *gin.Context) {
+	productId, err := strconv.Atoi(c.Param("productId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid product id"})
+		return
+	}
+	properties, err := pc.productService.GetPropertiesFromProduct(productId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "properties retrieved from product successfully", "productId": productId, "properties": properties})
+}

buildtime/server/controller/productGroupController.go

@@ -0,0 +1,162 @@
+package controller
+
+import (
+	"net/http"
+
+	"simplycpq/models"
+	"simplycpq/services"
+
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+type ProductGroupController struct {
+	productGroupService *services.ProductGroupService
+	valueService        *services.ValueService
+}
+
+func NewProductGroupController(productGroupService *services.ProductGroupService, valueService *services.ValueService) *ProductGroupController {
+	return &ProductGroupController{
+		productGroupService: productGroupService,
+		valueService:        valueService,
+	}
+}
+
+func (pgc *ProductGroupController) CreateProductGroup(c *gin.Context) {
+	var productGroup models.ProductGroup
+	if err := c.ShouldBindJSON(&productGroup); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	createdProductGroup, err := pgc.productGroupService.CreateProductGroup(&productGroup)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, createdProductGroup)
+}
+
+func (pgc *ProductGroupController) UpdateProductGroup(c *gin.Context) {
+	var productGroup models.ProductGroup
+	if err := c.ShouldBindJSON(&productGroup); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	updatedProductGroup, err := pgc.productGroupService.UpdateProductGroup(&productGroup)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, updatedProductGroup)
+}
+
+func (pgc *ProductGroupController) DeleteProductGroup(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid ID"})
+		return
+	}
+	err = pgc.productGroupService.DeleteProductGroup(id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "ProductGroup deleted successfully"})
+}
+
+func (pgc *ProductGroupController) GetProductGroup(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid ID"})
+		return
+	}
+	productGroup, err := pgc.productGroupService.GetProductGroup(id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, productGroup)
+}
+
+func (pgc *ProductGroupController) GetProductGroupsByParentId(c *gin.Context) {
+	parentId, err := strconv.Atoi(c.Param("parentId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid parent ID"})
+		return
+	}
+	productGroups, err := pgc.productGroupService.GetProductGroupsByParentId(parentId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, productGroups)
+}
+
+func (pgc *ProductGroupController) DeleteProductFromProductGroupId(c *gin.Context) {
+	productId, err := strconv.Atoi(c.Param("productId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid product ID"})
+		return
+	}
+	err = pgc.productGroupService.DeleteProductFromProductGroupId(productId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "Product deleted from product group successfully"})
+}
+
+func (pgc *ProductGroupController) GetPropertiesFromProductGroupId(c *gin.Context) {
+	productGroupId, err := strconv.Atoi(c.Param("productGroupId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid product group ID"})
+		return
+	}
+	properties, err := pgc.productGroupService.GetPropertiesFromProductGroupId(productGroupId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, properties)
+}
+
+func (pgc *ProductGroupController) DeletePropertyFromProductGroupId(c *gin.Context) {
+	propertyId, err := strconv.Atoi(c.Param("propertyId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid property ID"})
+		return
+	}
+	productGroupId, err := strconv.Atoi(c.Param("productGroupId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid product group ID"})
+		return
+	}
+	err = pgc.productGroupService.DeletePropertyFromProductGroup(productGroupId, propertyId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "Property deleted from product group successfully"})
+}
+
+func (pgc *ProductGroupController) CreatePropertyToProductGroupId(c *gin.Context) {
+	var property models.Property
+	if err := c.ShouldBindJSON(&property); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	productGroupId, err := strconv.Atoi(c.Param("productGroupId"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid product group ID"})
+		return
+	}
+
+	property2, err := pgc.productGroupService.CreatePropertyToProductGroupId(productGroupId, &property)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, property2)
+}

buildtime/server/models/value.go

@@ -19,6 +19,8 @@ type Property struct {
 	Label          string `json:"label"`
 	Description    string `json:"description"`
 	PropertyTypeID int    `json:"propertyTypeId"`
+	ProductID      int    `json:"productId"`
+	ProductGroupID int    `json:"productGroupId"`
 }
 
 type Value struct {

buildtime/server/repositories/productGroupRepository.go

@@ -0,0 +1,152 @@
+package repositories
+
+import (
+	"database/sql"
+	"simplycpq/models"
+)
+
+type ProductGroupRepository struct {
+	db              *sql.DB
+	valueRepository *ValueRepository
+}
+
+func NewProductGroupRepository(db *sql.DB, valueRepository *ValueRepository) *ProductGroupRepository {
+	return &ProductGroupRepository{
+		db:              db,
+		valueRepository: valueRepository,
+	}
+}
+
+func (r *ProductGroupRepository) CreateProductGroup(productGroup *models.ProductGroup) (*models.ProductGroup, error) {
+	// Insert the product group into the database
+	query := "INSERT INTO product_groups (label, description, parentgroupid) VALUES($1,$2,$3) RETURNING id"
+	err := r.db.QueryRow(query, productGroup.Label, productGroup.Description, productGroup.ParentGroupID).Scan(&productGroup.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	// get all properties from parent group and copy them to the new group
+	if productGroup.ParentGroupID != 0 {
+		properties, err := r.GetPropertiesFromProductGroupId(productGroup.ParentGroupID)
+		if err != nil {
+			return nil, err
+		}
+		for _, prop := range properties {
+			_, err := r.valueRepository.createPropertyFromProperty(productGroup.ID, 0, prop)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	return productGroup, nil
+}
+
+func (r *ProductGroupRepository) UpdateProductGroup(productGroup *models.ProductGroup) (*models.ProductGroup, error) {
+	query := "UPDATE product_groups SET label=$1, description=$2, parentgroupid=$3 WHERE id=$4"
+	_, err := r.db.Exec(query, productGroup.Label, productGroup.Description, productGroup.ParentGroupID, productGroup.ID)
+	if err != nil {
+		return nil, err
+	}
+	return productGroup, nil
+}
+
+func (r *ProductGroupRepository) DeleteProductGroup(id int) error {
+	query := "DELETE FROM product_groups WHERE id=$1"
+	_, err := r.db.Exec(query, id)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r *ProductGroupRepository) GetProductGroup(id int) (*models.ProductGroup, error) {
+	query := "SELECT id, label, description, parentgroupid FROM product_groups WHERE id=$1"
+	row := r.db.QueryRow(query, id)
+	productGroup := &models.ProductGroup{}
+	err := row.Scan(&productGroup.ID, &productGroup.Label, &productGroup.Description, &productGroup.ParentGroupID)
+	if err != nil {
+		return nil, err
+	}
+	return productGroup, nil
+}
+
+func (r *ProductGroupRepository) GetProductGroupsByParentId(parentId int) ([]*models.ProductGroup, error) {
+	query := "SELECT id, label, description, parentgroupid FROM product_groups WHERE parentgroupid=$1"
+	rows, err := r.db.Query(query, parentId)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var productGroups []*models.ProductGroup
+	for rows.Next() {
+		var productGroup models.ProductGroup
+		err := rows.Scan(&productGroup.ID, &productGroup.Label, &productGroup.Description, &productGroup.ParentGroupID)
+		if err != nil {
+			return nil, err
+		}
+		productGroups = append(productGroups, &productGroup)
+	}
+	if err = rows.Err(); err != nil {
+		return nil, err
+	}
+	return productGroups, nil
+}
+
+func (r *ProductGroupRepository) DeleteProductFromProductGroupId(productGroupId int) error {
+	query := "DELETE FROM products WHERE productgroupid=$1"
+	_, err := r.db.Exec(query, productGroupId)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r *ProductGroupRepository) GetPropertiesFromProductGroupId(productGroupId int) ([]*models.Property, error) {
+	query := "SELECT id, label, description, propertytypeid, productid, productgroupid FROM properties WHERE productgroupid=$1"
+	rows, err := r.db.Query(query, productGroupId)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var properties []*models.Property
+	for rows.Next() {
+		var property models.Property
+		err := rows.Scan(&property.ID, &property.Label, &property.Description, &property.PropertyTypeID, &property.ProductID, &property.ProductGroupID)
+		if err != nil {
+			return nil, err
+		}
+		properties = append(properties, &property)
+	}
+	if err = rows.Err(); err != nil {
+		return nil, err
+	}
+	return properties, nil
+}
+
+func (r *ProductGroupRepository) DeletePropertyFromProductGroup(productGroupId int, propertyId int) error {
+	query := "DELETE FROM properties WHERE productgroupid=$1 AND id=$2"
+	_, err := r.db.Exec(query, productGroupId, propertyId)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r *ProductGroupRepository) CreatePropertyFromProductGroup(productGroupId int, property *models.Property) (*models.Property, error) {
+	query := "INSERT INTO properties (label, description, propertytypeid, productid, productgroupid) VALUES($1,$2,$3,$4,$5) RETURNING id"
+	err := r.db.QueryRow(query, property.Label, property.Description, property.PropertyTypeID, property.ProductID, productGroupId).Scan(&property.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	// copy property values from parent group to new property
+	if productGroupId != 0 {
+		err := r.valueRepository.copyValuesFromPropertyTypeToProperty(property.ID, property.PropertyTypeID)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return property, nil
+}

buildtime/server/repositories/productRepository.go

@@ -0,0 +1,126 @@
+package repositories
+
+import (
+	"database/sql"
+	"simplycpq/models"
+)
+
+type ProductRepository struct {
+	dbHandler              *sql.DB
+	productGroupRepository *ProductGroupRepository
+	valueRepository        *ValueRepository
+}
+
+func NewProductRepository(dbHandler *sql.DB, productGroupRepository *ProductGroupRepository, valueRepository *ValueRepository) *ProductRepository {
+	return &ProductRepository{
+		dbHandler:              dbHandler,
+		productGroupRepository: productGroupRepository,
+		valueRepository:        valueRepository,
+	}
+}
+
+func (pr *ProductRepository) CreateProduct(product *models.Product) (*models.Product, error) {
+	// Implement the logic to insert a new product into the database
+	query := "INSERT INTO products (label, externalId, description, productGroupId) VALUES ($1, $2, $3, $4) RETURNING id"
+	err := pr.dbHandler.QueryRow(query, product.Label, product.ExternalID, product.Description, product.ProductGroupID).Scan(&product.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	// copy Properties from ProductGroup to Product
+	properties, err := pr.productGroupRepository.GetPropertiesFromProductGroupId(product.ProductGroupID)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, property := range properties {
+		_, err := pr.valueRepository.createPropertyFromProperty(0, product.ID, property)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return product, nil
+}
+
+func (pr *ProductRepository) GetProductById(id int) (*models.Product, error) {
+	// Implement the logic to retrieve a product by its ID from the database
+	query := "SELECT id, label, externalId, description, productGroupId FROM products WHERE id = $1"
+	row := pr.dbHandler.QueryRow(query, id)
+	product := &models.Product{}
+	err := row.Scan(&product.ID, &product.Label, &product.ExternalID, &product.Description, &product.ProductGroupID)
+	if err != nil {
+		return nil, err
+	}
+	return product, nil
+}
+
+func (pr *ProductRepository) UpdateProduct(product *models.Product) error {
+	// Implement the logic to update an existing product in the database
+	query := "UPDATE products SET label = $1, externalId = $2, description = $3, productGroupId = $4 WHERE id = $5"
+	_, err := pr.dbHandler.Exec(query, product.Label, product.ExternalID, product.Description, product.ProductGroupID, product.ID)
+	return err
+}
+
+func (pr *ProductRepository) DeleteProduct(id int) error {
+	// Implement the logic to delete a product from the database
+	query := "DELETE FROM products WHERE id = $1"
+	_, err := pr.dbHandler.Exec(query, id)
+	return err
+}
+
+func (pr *ProductRepository) GetProductsByGroupId(groupId int) ([]*models.Product, error) {
+	// Implement the logic to retrieve all products by their group ID from the database
+	query := "SELECT id, label, externalId, description, productGroupId FROM products WHERE productGroupId = $1"
+	rows, err := pr.dbHandler.Query(query, groupId)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	products := []*models.Product{}
+	for rows.Next() {
+		product := &models.Product{}
+		err := rows.Scan(&product.ID, &product.Label, &product.ExternalID, &product.Description, &product.ProductGroupID)
+		if err != nil {
+			return nil, err
+		}
+		products = append(products, product)
+	}
+	return products, nil
+}
+
+func (pr *ProductRepository) AddPropertyToProduct(productId int, propertyId int) error {
+	// Implement the logic to add a property to a product in the database
+	query := "INSERT INTO product_properties (productId, propertyId) VALUES ($1, $2)"
+	_, err := pr.dbHandler.Exec(query, productId, propertyId)
+	return err
+}
+
+func (pr *ProductRepository) DeletePropertyFromProduct(productId int, propertyId int) error {
+	// Implement the logic to delete a property from a product in the database
+	query := "DELETE FROM product_properties WHERE productId = $1 AND propertyId = $2"
+	_, err := pr.dbHandler.Exec(query, productId, propertyId)
+	return err
+}
+
+func (pr *ProductRepository) GetPropertiesFromProduct(productId int) ([]*models.Property, error) {
+	// Implement the logic to retrieve all properties from a product in the database
+	query := "SELECT id, label, description, propertyTypeId, productId, productGroupId FROM properties WHERE productId = $1"
+	rows, err := pr.dbHandler.Query(query, productId)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	properties := []*models.Property{}
+	for rows.Next() {
+		property := &models.Property{}
+		err := rows.Scan(&property.ID, &property.Label, &property.Description, &property.PropertyTypeID, &property.ProductID, &property.ProductGroupID)
+		if err != nil {
+			return nil, err
+		}
+		properties = append(properties, property)
+	}
+	return properties, nil
+}

buildtime/server/repositories/valueRepository.go

@@ -267,6 +267,48 @@ func (vr *ValueRepository) GetValue(id int) (*models.Value, error) {
 	return &value, nil
 }
 
+func (vr *ValueRepository) createPropertyFromPropertyType(productGroupId int, productId int, propertyType *models.PropertyType) (*models.Property, error) {
+	query := `INSERT INTO properties (label, description, propertytypeid, productid, productgroupid) VALUES ($1, $2, $3, $4, $5) RETURNING id`
+	var property models.Property
+	err := vr.db.QueryRow(query, propertyType.Label, propertyType.Description, propertyType.ID, productId, productGroupId).Scan(&property.ID)
+	if err != nil {
+		return nil, err
+	}
+	property.Label = propertyType.Label
+	property.Description = propertyType.Description
+	property.PropertyTypeID = propertyType.ID
+	property.ProductID = productId
+	property.ProductGroupID = productGroupId
+
+	// Copy values from property type to property
+	err = vr.copyValuesFromPropertyTypeToProperty(propertyType.ID, property.ID)
+	if err != nil {
+		return nil, err
+	}
+	return &property, nil
+}
+
+func (vr *ValueRepository) createPropertyFromProperty(productGroupId int, productId int, property *models.Property) (*models.Property, error) {
+	query := `INSERT INTO properties (label, description, propertytypeid, productid, productgroupid) VALUES ($1, $2, $3, $4, $5) RETURNING id`
+	var newProperty models.Property
+	err := vr.db.QueryRow(query, property.Label, property.Description, property.PropertyTypeID, productId, productGroupId).Scan(&newProperty.ID)
+	if err != nil {
+		return nil, err
+	}
+	newProperty.Label = property.Label
+	newProperty.Description = property.Description
+	newProperty.PropertyTypeID = property.PropertyTypeID
+	newProperty.ProductID = productId
+	newProperty.ProductGroupID = productGroupId
+
+	// Copy values from property type to property
+	err = vr.copyValuesFromPropertyToProperty(property.ID, newProperty.ID)
+	if err != nil {
+		return nil, err
+	}
+	return &newProperty, nil
+}
+
 func (vr *ValueRepository) copyValuesFromPropertyTypeToProperty(propertyTypeId int, propertyId int) error {
 	// Implement the logic to copy values from a property type to a property
 	query := `INSERT INTO values (propertyId, label, description) SELECT $1, label, description FROM values WHERE propertytypeid=$2`

buildtime/server/server/httpServer.go

@@ -15,20 +15,30 @@ import (
 )
 
 type HttpServer struct {
-	config          *viper.Viper
-	router          *gin.Engine
-	dbHandler       *sql.DB
-	valueController *controller.ValueController
+	config                 *viper.Viper
+	router                 *gin.Engine
+	dbHandler              *sql.DB
+	valueController        *controller.ValueController
+	productGroupController *controller.ProductGroupController
+	productController      *controller.ProductController
 }
 
 func InitHttpServer(config *viper.Viper, dbHandler *sql.DB) HttpServer {
 
 	// repository initialisation:
 	valueRepository := repositories.NewValueRepository(dbHandler)
+	productGroupRepository := repositories.NewProductGroupRepository(dbHandler, valueRepository)
+	productRepository := repositories.NewProductRepository(dbHandler, productGroupRepository, valueRepository)
+
 	// service initialisation:
 	valueService := services.NewValueService(valueRepository)
+	productGroupService := services.NewProductGroupService(productGroupRepository)
+	productService := services.NewProductService(productRepository)
+
 	// controller initialisation:
 	valueController := controller.NewValueController(valueService)
+	productGroupController := controller.NewProductGroupController(productGroupService, valueService)
+	productController := controller.NewProductController(productService, productGroupService, valueService)
 
 	// Service API
 	router := gin.Default()
@@ -55,13 +65,34 @@ func InitHttpServer(config *viper.Viper, dbHandler *sql.DB) HttpServer {
 	router.GET("/getValue/:id", valueController.GetValue)                                                                                       // get Value by id
 
 	// Product centric routing
+	// ProductGroup
+	router.POST("/createProductGroup", productGroupController.CreateProductGroup)                                                           // create ProductGroup
+	router.PUT("/updateProductGroup", productGroupController.UpdateProductGroup)                                                            // update ProductGroup
+	router.DELETE("/deleteProductGroup/:id", productGroupController.DeleteProductGroup)                                                     // delete ProductGroup
+	router.GET("/getProductGroup/:id", productGroupController.GetProductGroup)                                                              // get ProductGroup by id
+	router.GET("/getProductGroupsByParentId/:parentId", productGroupController.GetProductGroupsByParentId)                                  // get all ProductGroups by parent ID
+	router.DELETE("/deleteProductFromProductGroupId/:productId", productGroupController.DeleteProductFromProductGroupId)                    // delete Product from ProductGroup by ID
+	router.POST("/getPropertiesFromProductGroupId/:productGroupId", productGroupController.GetPropertiesFromProductGroupId)                 // get Properties from ProductGroup by ID
+	router.DELETE("/deletePropertyFromProductGroupId/:propertyId/:productGroupId", productGroupController.DeletePropertyFromProductGroupId) // delete Property from ProductGroup by ID
+	router.POST("/createPropertyToProductGroupId/:propertyTypeId/:productGroupId", productGroupController.CreatePropertyToProductGroupId)   // add Property to ProductGroup by ID
+
+	// Product
+	router.POST("/createProduct", productController.CreateProduct)                                          // create Product
+	router.PUT("/updateProduct", productController.UpdateProduct)                                           // update Product
+	router.DELETE("/deleteProduct/:id", productController.DeleteProduct)                                    // delete Product
+	router.GET("/getProduct/:id", productController.GetProduct)                                             // get Product by id
+	router.GET("/getProductsByGroupId/:groupId", productController.GetProductsByGroupId)                    // get all Products by group ID
+	router.POST("/addPropertyToProductId/:productId", productController.AddPropertyToProductId)             // add Property to Product by ID
+	router.DELETE("/deletePropertyFromProductId/:productId", productController.DeletePropertyFromProductId) // delete Property from Product by ID
 
 	// server
 	return HttpServer{
-		config:          config,
-		router:          router,
-		dbHandler:       dbHandler,
-		valueController: valueController,
+		config:                 config,
+		router:                 router,
+		dbHandler:              dbHandler,
+		valueController:        valueController,
+		productGroupController: productGroupController,
+		productController:      productController,
 	}
 }
 

buildtime/server/services/productGroupService.go

@@ -0,0 +1,56 @@
+package services
+
+import (
+	"simplycpq/models"
+	"simplycpq/repositories"
+)
+
+type ProductGroupService struct {
+	productGroupRepository *repositories.ProductGroupRepository
+}
+
+func NewProductGroupService(productGroupRepository *repositories.ProductGroupRepository) *ProductGroupService {
+	return &ProductGroupService{
+		productGroupRepository: productGroupRepository,
+	}
+}
+
+func (s *ProductGroupService) CreateProductGroup(productGroup *models.ProductGroup) (*models.ProductGroup, error) {
+	return s.productGroupRepository.CreateProductGroup(productGroup)
+}
+
+func (s *ProductGroupService) UpdateProductGroup(productGroup *models.ProductGroup) (*models.ProductGroup, error) {
+	return s.productGroupRepository.UpdateProductGroup(productGroup)
+}
+
+func (s *ProductGroupService) DeleteProductGroup(id int) error {
+	return s.productGroupRepository.DeleteProductGroup(id)
+}
+
+func (s *ProductGroupService) GetProductGroup(id int) (*models.ProductGroup, error) {
+	return s.productGroupRepository.GetProductGroup(id)
+}
+
+func (s *ProductGroupService) GetPropertiesFromProductGroupId(id int) ([]*models.Property, error) {
+	return s.productGroupRepository.GetPropertiesFromProductGroupId(id)
+}
+
+func (s *ProductGroupService) GetProductGroupsByParentId(parentId int) ([]*models.ProductGroup, error) {
+	return s.productGroupRepository.GetProductGroupsByParentId(parentId)
+}
+
+func (s *ProductGroupService) DeleteProductFromProductGroupId(productGroupId int) error {
+	return s.productGroupRepository.DeleteProductFromProductGroupId(productGroupId)
+}
+
+func (s *ProductGroupService) GetPropertiesFromProductGroup(productGroupId int) ([]*models.Property, error) {
+	return s.productGroupRepository.GetPropertiesFromProductGroupId(productGroupId)
+}
+
+func (s *ProductGroupService) DeletePropertyFromProductGroup(productGroupId int, propertyId int) error {
+	return s.productGroupRepository.DeletePropertyFromProductGroup(productGroupId, propertyId)
+}
+
+func (s *ProductGroupService) CreatePropertyToProductGroupId(productGroupId int, property *models.Property) (*models.Property, error) {
+	return s.productGroupRepository.CreatePropertyFromProductGroup(productGroupId, property)
+}

buildtime/server/services/productService.go

@@ -0,0 +1,51 @@
+package services
+
+import (
+	"simplycpq/models"
+	"simplycpq/repositories"
+)
+
+type ProductService struct {
+	productRepository *repositories.ProductRepository
+}
+
+func NewProductService(productRepository *repositories.ProductRepository) *ProductService {
+	return &ProductService{
+		productRepository: productRepository,
+	}
+}
+
+func (s *ProductService) CreateProduct(product *models.Product) (*models.Product, error) {
+	return s.productRepository.CreateProduct(product)
+}
+func (s *ProductService) UpdateProduct(product *models.Product) error {
+	return s.productRepository.UpdateProduct(product)
+}
+
+func (s *ProductService) DeleteProduct(id int) error {
+	return s.productRepository.DeleteProduct(id)
+}
+
+func (s *ProductService) GetProduct(id int) (*models.Product, error) {
+	return s.productRepository.GetProductById(id)
+}
+
+func (s *ProductService) GetProductById(id int) (*models.Product, error) {
+	return s.productRepository.GetProductById(id)
+}
+
+func (s *ProductService) GetProductsByGroupId(groupId int) ([]*models.Product, error) {
+	return s.productRepository.GetProductsByGroupId(groupId)
+}
+
+func (s *ProductService) AddPropertyToProduct(productId int, propertyId int) error {
+	return s.productRepository.AddPropertyToProduct(productId, propertyId)
+}
+
+func (s *ProductService) DeletePropertyFromProduct(productId int, propertyId int) error {
+	return s.productRepository.DeletePropertyFromProduct(productId, propertyId)
+}
+
+func (s *ProductService) GetPropertiesFromProduct(productId int) ([]*models.Property, error) {
+	return s.productRepository.GetPropertiesFromProduct(productId)
+}