feat: add backend_v1 migration

backend_v1/app/requests/pagination.go

@@ -0,0 +1,30 @@
+package requests
+
+import "github.com/samber/lo"
+
+type Pager struct {
+	Pagination `json:",inline"`
+	Total      int64 `json:"total"`
+	Items      any   `json:"items"`
+}
+
+type Pagination struct {
+	Page  int64 `json:"page" form:"page" query:"page"`
+	Limit int64 `json:"limit" form:"limit" query:"limit"`
+}
+
+func (filter *Pagination) Offset() int64 {
+	return (filter.Page - 1) * filter.Limit
+}
+
+func (filter *Pagination) Format() *Pagination {
+	if filter.Page <= 0 {
+		filter.Page = 1
+	}
+
+	if !lo.Contains([]int64{10, 20, 50, 100}, filter.Limit) {
+		filter.Limit = 10
+	}
+
+	return filter
+}

backend_v1/app/requests/sort.go

@@ -0,0 +1,41 @@
+package requests
+
+import (
+	"strings"
+
+	"github.com/samber/lo"
+)
+
+type SortQueryFilter struct {
+	Asc  *string `json:"asc" form:"asc"`
+	Desc *string `json:"desc" form:"desc"`
+}
+
+func (s *SortQueryFilter) AscFields() []string {
+	if s.Asc == nil {
+		return nil
+	}
+	return strings.Split(*s.Asc, ",")
+}
+
+func (s *SortQueryFilter) DescFields() []string {
+	if s.Desc == nil {
+		return nil
+	}
+	return strings.Split(*s.Desc, ",")
+}
+
+func (s *SortQueryFilter) DescID() *SortQueryFilter {
+	if s.Desc == nil {
+		s.Desc = lo.ToPtr("id")
+	}
+
+	items := s.DescFields()
+	if lo.Contains(items, "id") {
+		return s
+	}
+
+	items = append(items, "id")
+	s.Desc = lo.ToPtr(strings.Join(items, ","))
+	return s
+}