create /course in the api to get the course to make

backend/api/course.go

@@ -0,0 +1,43 @@
+package api
+
+import (
+	"bar/autogen"
+
+	"github.com/labstack/echo/v4"
+	"github.com/sirupsen/logrus"
+)
+
+// (GET /course)
+func (s *Server) GetCourse(c echo.Context, params autogen.GetCourseParams) error {
+	// Get admin account from cookie
+	_, err := MustGetAdmin(c)
+	if err != nil {
+		return nil
+	}
+	search := ""
+	if params.Fournisseur != nil {
+		search = *params.Fournisseur
+	}
+	var course []autogen.CourseItem
+
+	data, err := s.DBackend.GetItems(c.Request().Context(), "", 0, 0, "", "", search)
+	if err != nil {
+		logrus.Error(err)
+		return Error500(c)
+	}
+
+	for _, item := range data {
+		var amount_needed uint64 = item.OptimalAmount - item.AmountLeft
+		if amount_needed > 0 && item.AmountPerBundle != nil {
+			course = append(course, autogen.CourseItem{
+				AmountToBuy: amount_needed / *item.AmountPerBundle + (amount_needed % *item.AmountPerBundle) * 2 / *item.AmountPerBundle,
+				Item:        item.Item,
+			})
+		}
+	}
+
+	autogen.GetCourse200JSONResponse{
+		Items: course,
+	}.VisitGetCourseResponse(c.Response())
+	return nil
+}