51 lines
1.0 KiB
Go
51 lines
1.0 KiB
Go
package pagination
|
|
|
|
import (
|
|
"strconv"
|
|
|
|
"github.com/gin-gonic/gin"
|
|
)
|
|
|
|
// DefaultPerPage is the default page size.
|
|
// Reference: Chatwoot API default pagination (25 items per page)
|
|
const DefaultPerPage = 25
|
|
const MaxPerPage = 100
|
|
|
|
// Params holds pagination parameters extracted from request
|
|
type Params struct {
|
|
Page int
|
|
PerPage int
|
|
Offset int
|
|
}
|
|
|
|
// Parse extracts pagination params from Gin context query.
|
|
// Pattern: Chatwoot controllers use params[:page] and params[:per_page]
|
|
func Parse(c *gin.Context) Params {
|
|
page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
|
|
perPage, _ := strconv.Atoi(c.DefaultQuery("per_page", strconv.Itoa(DefaultPerPage)))
|
|
|
|
if page < 1 {
|
|
page = 1
|
|
}
|
|
if perPage < 1 {
|
|
perPage = DefaultPerPage
|
|
}
|
|
if perPage > MaxPerPage {
|
|
perPage = MaxPerPage
|
|
}
|
|
|
|
return Params{
|
|
Page: page,
|
|
PerPage: perPage,
|
|
Offset: (page - 1) * perPage,
|
|
}
|
|
}
|
|
|
|
// OffsetToPage converts offset back to page number
|
|
func OffsetToPage(offset, perPage int) int {
|
|
if perPage <= 0 {
|
|
return 1
|
|
}
|
|
return (offset / perPage) + 1
|
|
}
|