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59 lines
1.0 KiB
59 lines
1.0 KiB
package pagination
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import "math"
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const (
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DefaultPage = 1
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MinPageSize = 10
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MaxPageSize = 100
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)
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type Pagination struct {
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Page int32 `json:"page"`
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PageSize int32 `json:"page_size"`
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TotalPage int32 `json:"total_page"`
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Total int32 `json:"total"`
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}
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type Integer interface {
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~int | ~int32
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}
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func PageToOffset[T Integer](page, pageSize T) (offset, limit T) {
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if page < DefaultPage {
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page = DefaultPage
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}
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if pageSize <= MinPageSize {
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pageSize = MinPageSize
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}
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if pageSize >= MaxPageSize {
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pageSize = MaxPageSize
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}
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offset = (page - 1) * pageSize
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limit = pageSize
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return
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}
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func CalcPagination[T Integer, E Integer](page, pageSize T, total E) (res Pagination) {
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if page < DefaultPage {
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page = DefaultPage
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}
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if pageSize <= MinPageSize {
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pageSize = MinPageSize
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}
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if pageSize >= MaxPageSize {
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pageSize = MaxPageSize
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}
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res.Page = int32(page)
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res.PageSize = int32(pageSize)
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res.Total = int32(total)
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res.TotalPage = int32(math.Ceil(float64(res.Total) / float64(res.PageSize)))
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return
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}
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