50 lines
802 B
Go
50 lines
802 B
Go
package common
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import "errors"
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var (
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ErrPageOutOfRange = errors.New("requested page out of range")
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)
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type Pagination struct {
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Page *int `json:"page"`
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PerPage *int `json:"perPage"`
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}
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func (p Pagination) OffsetPerPage(perPageDefault int) (offset int32, perPage int32) {
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page := int32(DefaultIfNilOrZero(p.Page, 1))
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perPage = int32(DefaultIfNilOrZero(p.PerPage, perPageDefault))
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offset = (page - 1) * perPage
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return
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}
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type SortDirection string
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const (
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DirAsc SortDirection = "asc"
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DirDesc SortDirection = "desc"
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)
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func (t *SortDirection) DirString(def SortDirection) string {
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if t == nil {
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return string(def)
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}
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return string(*t)
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}
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func (t *SortDirection) IsValid() bool {
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if t == nil {
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return true
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}
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switch *t {
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case DirAsc, DirDesc:
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return true
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}
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return false
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}
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