new endpoint to return product list

app/utils/query/query_params/params_query.go

@@ -0,0 +1,63 @@
+package query_params
+
+import (
+	"strconv"
+
+	"git.ma-al.com/goc_daniel/b2b/app/utils/query/filters"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/query/find"
+	"github.com/gofiber/fiber/v3"
+)
+
+var FunctionalQueryParams = []string{
+	// Used to specidy order of results
+	"sort",
+	// Used to specify page of search resulst
+	"p",
+	// Used to specify number of elements on a page
+	"elems",
+	// Used to specify allowed values of features on products
+	"values",
+}
+
+func ParseFilters[T any](c fiber.Ctx, formColumnMappimg ...map[string]string) (find.Paging, *filters.FiltersList, error) {
+	// field/column based filters
+	filters, err := ParseFieldFilters[T](c, formColumnMappimg...)
+	if err != nil {
+		return find.Paging{}, filters, err
+	}
+	// pagination
+	pageNum, pageSize := ParsePagination(c)
+
+	// ret
+	return find.Paging{Page: pageNum, Elements: pageSize}, filters, nil
+}
+
+// Parse field related filters from params query. Produces where clauses and
+// order rules.
+func ParseFieldFilters[T any](c fiber.Ctx, formColumnMapping ...map[string]string) (*filters.FiltersList, error) {
+	// var model T
+	list := filters.NewFiltersList()
+
+	whereScopefilters := ParseWhereScopes[T](c, []string{}, formColumnMapping...)
+	list.Append(whereScopefilters...)
+
+	ord, err := ParseOrdering[T](c, formColumnMapping...)
+	if err != nil {
+		return &list, err
+	}
+	// addDefaultOrderingIfNeeded(&ord, model)
+	for i := range ord {
+		if err == nil {
+			list.Append(filters.Order(ord[i].Column, ord[i].IsDesc))
+		}
+	}
+
+	return &list, nil
+}
+
+// TODO: Add some source of defaults for pagination size here
+func ParsePagination(c fiber.Ctx) (uint, uint) {
+	pageNum, _ := strconv.ParseInt(c.Query("p", "1"), 10, 64)
+	pageSize, _ := strconv.ParseInt(c.Query("elems", "30"), 10, 64)
+	return uint(pageNum), uint(pageSize)
+}