app/delivery/web/api/restricted/menu.go

@@ -26,6 +26,7 @@ func MenuHandlerRoutes(r fiber.Router) fiber.Router {
 	handler := NewMenuHandler()
 
 	r.Get("/get-category-tree", handler.GetCategoryTree)
+	r.Get("/get-breadcrumb", handler.GetBreadcrumb)
 	r.Get("/get-top-menu", handler.GetTopMenu)
 
 	return r
@@ -54,6 +55,36 @@ func (h *MenuHandler) GetCategoryTree(c fiber.Ctx) error {
 	return c.JSON(response.Make(&category_tree, 0, i18n.T_(c, response.Message_OK)))
 }
 
+func (h *MenuHandler) GetBreadcrumb(c fiber.Ctx) error {
+	lang_id, ok := c.Locals("langID").(uint)
+	if !ok {
+		return c.Status(responseErrors.GetErrorStatus(responseErrors.ErrBadAttribute)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, responseErrors.ErrBadAttribute)))
+	}
+
+	root_category_id_attribute := c.Query("root_category_id")
+	root_category_id, err := strconv.Atoi(root_category_id_attribute)
+	if err != nil {
+		return c.Status(responseErrors.GetErrorStatus(responseErrors.ErrBadAttribute)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, responseErrors.ErrBadAttribute)))
+	}
+
+	category_id_attribute := c.Query("category_id")
+	category_id, err := strconv.Atoi(category_id_attribute)
+	if err != nil {
+		return c.Status(responseErrors.GetErrorStatus(responseErrors.ErrBadAttribute)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, responseErrors.ErrBadAttribute)))
+	}
+
+	breadcrumb, err := h.menuService.GetBreadcrumb(uint(root_category_id), uint(category_id), lang_id)
+	if err != nil {
+		return c.Status(responseErrors.GetErrorStatus(err)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
+	}
+
+	return c.JSON(response.Make(&breadcrumb, 0, i18n.T_(c, response.Message_OK)))
+}
+
 func (h *MenuHandler) GetTopMenu(c fiber.Ctx) error {
 	lang_id, ok := c.Locals("langID").(uint)
 	if !ok {

app/delivery/web/api/settings.go

@@ -21,10 +21,12 @@ type SettingsResponse struct {
 
 // AppSettings represents app configuration
 type AppSettings struct {
-	Name          string `json:"name"`
+	Name                string `json:"name"`
-	Environment   string `json:"environment"`
+	Environment         string `json:"environment"`
-	BaseURL       string `json:"base_url"`
+	BaseURL             string `json:"base_url"`
-	PasswordRegex string `json:"password_regex"`
+	PasswordRegex       string `json:"password_regex"`
+	CategoryTreeRootID  uint   `json:"category_tree_root_id"`
+	ShopDefaultLanguage uint   `json:"shop_default_language"`
 	// Config        config.Config `json:"config"`
 }
 
@@ -65,10 +67,12 @@ func (h *SettingsHandler) GetSettings(cfg *config.Config) fiber.Handler {
 	return func(c fiber.Ctx) error {
 		settings := SettingsResponse{
 			App: AppSettings{
-				Name:          cfg.App.Name,
+				Name:                cfg.App.Name,
-				Environment:   cfg.App.Environment,
+				Environment:         cfg.App.Environment,
-				BaseURL:       cfg.App.BaseURL,
+				BaseURL:             cfg.App.BaseURL,
-				PasswordRegex: constdata.PASSWORD_VALIDATION_REGEX,
+				PasswordRegex:       constdata.PASSWORD_VALIDATION_REGEX,
+				CategoryTreeRootID:  constdata.CATEGORY_TREE_ROOT_ID,
+				ShopDefaultLanguage: constdata.SHOP_DEFAULT_LANGUAGE,
 				// Config:        *config.Get(),
 			},
 			Server: ServerSettings{

app/model/category.go

@@ -0,0 +1,33 @@
+package model
+
+type ScannedCategory struct {
+	CategoryID  uint   `gorm:"column:category_id;primaryKey"`
+	Name        string `gorm:"column:name"`
+	Active      uint   `gorm:"column:active"`
+	Position    uint   `gorm:"column:position"`
+	ParentID    uint   `gorm:"column:id_parent"`
+	IsRoot      uint   `gorm:"column:is_root_category"`
+	LinkRewrite string `gorm:"column:link_rewrite"`
+	IsoCode     string `gorm:"column:iso_code"`
+
+	Visited bool //this is for internal backend use only
+}
+
+type Category struct {
+	CategoryID uint   `json:"category_id" form:"category_id"`
+	Label      string `json:"label" form:"label"`
+	// Active     bool           `json:"active" form:"active"`
+	Params   CategoryParams `json:"params" form:"params"`
+	Children []Category     `json:"children" form:"children"`
+}
+
+type CategoryParams struct {
+	CategoryID  uint   `json:"category_id" form:"category_id"`
+	LinkRewrite string `json:"link_rewrite" form:"link_rewrite"`
+	Locale      string `json:"locale" form:"locale"`
+}
+
+type CategoryInBreadcrumb struct {
+	CategoryID uint   `json:"category_id" form:"category_id"`
+	Name       string `json:"name" form:"name"`
+}

app/model/product.go

@@ -84,30 +84,4 @@ type ProductFilters struct {
 	InStock      uint    `query:"stock,omitempty"`
 }
 
-type ScannedCategory struct {
-	CategoryID  uint   `gorm:"column:category_id;primaryKey"`
-	Name        string `gorm:"column:name"`
-	Active      uint   `gorm:"column:active"`
-	Position    uint   `gorm:"column:position"`
-	ParentID    uint   `gorm:"column:id_parent"`
-	IsRoot      uint   `gorm:"column:is_root_category"`
-	LinkRewrite string `gorm:"column:link_rewrite"`
-	IsoCode     string `gorm:"column:iso_code"`
-
-	Visited bool //this is for internal backend use only
-}
-type Category struct {
-	CategoryID uint   `json:"category_id" form:"category_id"`
-	Label      string `json:"label" form:"label"`
-	// Active     bool           `json:"active" form:"active"`
-	Params   CategoryParams `json:"params" form:"params"`
-	Children []Category     `json:"children" form:"children"`
-}
-
-type CategoryParams struct {
-	CategoryID  uint   `json:"category_id" form:"category_id"`
-	LinkRewrite string `json:"link_rewrite" form:"link_rewrite"`
-	Locale      string `json:"locale" form:"locale"`
-}
-
 type FeatVal = map[uint][]uint

app/service/menuService/menuService.go

@@ -1,6 +1,7 @@
 package menuService
 
 import (
+	"slices"
 	"sort"
 
 	"git.ma-al.com/goc_daniel/b2b/app/model"
@@ -112,6 +113,69 @@ func (a ByPosition) Len() int           { return len(a) }
 func (a ByPosition) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
 func (a ByPosition) Less(i, j int) bool { return a[i].Position < a[j].Position }
 
+func (s *MenuService) GetBreadcrumb(root_category_id uint, start_category_id uint, id_lang uint) ([]model.CategoryInBreadcrumb, error) {
+	all_categories, err := s.categoriesRepo.GetAllCategories(id_lang)
+	if err != nil {
+		return []model.CategoryInBreadcrumb{}, err
+	}
+
+	breadcrumb := []model.CategoryInBreadcrumb{}
+
+	start_index := 0
+	start_found := false
+	for i := 0; i < len(all_categories); i++ {
+		if all_categories[i].CategoryID == start_category_id {
+			start_index = i
+			start_found = true
+			break
+		}
+	}
+	if !start_found {
+		return []model.CategoryInBreadcrumb{}, responseErrors.ErrStartCategoryNotFound
+	}
+
+	// map category ids to indices
+	id_to_index := make(map[uint]int)
+	for i := 0; i < len(all_categories); i++ {
+		all_categories[i].Visited = false
+		id_to_index[all_categories[i].CategoryID] = i
+	}
+
+	// do a simple graph traversal, always jumping from node to its parent
+	index := start_index
+	success := true
+	for {
+		if all_categories[index].Visited {
+			success = false
+			break
+		}
+		all_categories[index].Visited = true
+
+		var next_category model.CategoryInBreadcrumb
+		next_category.CategoryID = all_categories[index].CategoryID
+		next_category.Name = all_categories[index].Name
+		breadcrumb = append(breadcrumb, next_category)
+
+		if all_categories[index].CategoryID == root_category_id {
+			break
+		}
+		next_index, ok := id_to_index[all_categories[index].ParentID]
+		if !ok {
+			success = false
+			break
+		}
+		index = next_index
+	}
+
+	slices.Reverse(breadcrumb)
+
+	if !success {
+		return breadcrumb, responseErrors.ErrRootNeverReached
+	}
+
+	return breadcrumb, nil
+}
+
 func (s *MenuService) GetTopMenu(id uint) ([]*model.B2BTopMenu, error) {
 	items, err := s.routesRepo.GetTopMenu(id)
 	if err != nil {

app/utils/const_data/consts.go

@@ -3,6 +3,11 @@ package constdata
 // PASSWORD_VALIDATION_REGEX is used by the frontend (JavaScript supports lookaheads).
 const PASSWORD_VALIDATION_REGEX = `^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).{10,}$`
 const SHOP_ID = 1
+const SHOP_DEFAULT_LANGUAGE = 1
+
+// CATEGORY_TREE_ROOT_ID corresponds to id_category in ps_category which has is_root_category=1
+const CATEGORY_TREE_ROOT_ID = 2
+
 const MAX_AMOUNT_OF_CARTS_PER_USER = 10
 const DEFAULT_NEW_CART_NAME = "new cart"
 

app/utils/responseErrors/responseErrors.go

@@ -50,8 +50,10 @@ var (
 	ErrBadPaging = errors.New("bad or missing paging attribute value in header")
 
 	// Typed errors for menu handler
-	ErrNoRootFound        = errors.New("no root found in categories table")
+	ErrNoRootFound           = errors.New("no root found in categories table")
-	ErrCircularDependency = errors.New("circular dependency structure in tree (could be caused by improper root id)")
+	ErrCircularDependency    = errors.New("circular dependency structure in tree (could be caused by improper root id)")
+	ErrStartCategoryNotFound = errors.New("the start category has not been found")
+	ErrRootNeverReached      = errors.New("the root category is not an ancestor of start category")
 
 	// Typed errors for carts handler
 	ErrMaxAmtOfCartsReached              = errors.New("maximal amount of carts reached")
@@ -148,6 +150,10 @@ func GetErrorCode(c fiber.Ctx, err error) string {
 		return i18n.T_(c, "error.no_root_found")
 	case errors.Is(err, ErrCircularDependency):
 		return i18n.T_(c, "error.circular_dependency")
+	case errors.Is(err, ErrStartCategoryNotFound):
+		return i18n.T_(c, "error.start_category_not_found")
+	case errors.Is(err, ErrRootNeverReached):
+		return i18n.T_(c, "error.root_never_reached")
 
 	case errors.Is(err, ErrMaxAmtOfCartsReached):
 		return i18n.T_(c, "error.max_amt_of_carts_reached")
@@ -193,6 +199,8 @@ func GetErrorStatus(err error) int {
 		errors.Is(err, ErrBadPaging),
 		errors.Is(err, ErrNoRootFound),
 		errors.Is(err, ErrCircularDependency),
+		errors.Is(err, ErrStartCategoryNotFound),
+		errors.Is(err, ErrRootNeverReached),
 		errors.Is(err, ErrMaxAmtOfCartsReached),
 		errors.Is(err, ErrUserHasNoSuchCart),
 		errors.Is(err, ErrProductOrItsVariationDoesNotExist):

bruno/b2b-daniel/get-breadcrumb.yml

@@ -0,0 +1,22 @@
+info:
+  name: get-breadcrumb
+  type: http
+  seq: 18
+
+http:
+  method: GET
+  url: http://localhost:3000/api/v1/restricted/menu/get-breadcrumb?root_category_id=10&category_id=13
+  params:
+    - name: root_category_id
+      value: "10"
+      type: query
+    - name: category_id
+      value: "13"
+      type: query
+  auth: inherit
+
+settings:
+  encodeUrl: true
+  timeout: 0
+  followRedirects: true
+  maxRedirects: 5

bruno/b2b-daniel/get-category-tree.yml

@@ -5,10 +5,10 @@ info:
 
 http:
   method: GET
-  url: http://localhost:3000/api/v1/restricted/menu/get-category-tree?root_category_id=3
+  url: http://localhost:3000/api/v1/restricted/menu/get-category-tree?root_category_id=10
   params:
     - name: root_category_id
-      value: "3"
+      value: "10"
       type: query
   auth: inherit