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utils.go
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/
utils.go
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package pagerx
import (
"github.com/meiguonet/mgboot-go-common/util/castx"
)
func IsNoPage(arg0 interface{}) bool {
if b1, ok := arg0.(bool); ok {
return b1
}
if n1, ok := arg0.(int); ok {
return n1 == 1
}
if map1, ok := arg0.(map[string]interface{}); ok {
if _, ok := map1["disablePagination"]; ok {
return map1["disablePagination"] == 1
} else if _, ok := map1["nopage"]; ok {
return map1["nopage"] == 1
}
}
return false
}
func GetPageAndPageSize(args ...interface{}) (int, int) {
switch len(args) {
case 1:
if map1, ok := args[0].(map[string]interface{}); ok {
page := castx.ToInt(map1["page"])
if page < 1 {
page = 1
}
pageSize := castx.ToInt(map1["pageSize"])
if pageSize < 1 {
pageSize = 20
}
return page, pageSize
}
if pageSize, ok := args[0].(int); ok && pageSize > 0 {
return 1, pageSize
}
return 1, 20
case 2:
page, ok1 := args[0].(int)
pageSize, ok2 := args[1].(int)
if !ok1 || !ok2 {
return 1, 20
}
if page < 1 {
page = 1
}
if pageSize < 1 {
pageSize = 20
}
return page, pageSize
default:
return 1, 20
}
}
func ForPage(cnt, page, pageSize int) (int, int) {
if cnt < 1 || page < 1 || pageSize < 1 {
return -1, -1
}
pageTotal := cnt / pageSize
if cnt % pageSize != 0 {
pageTotal++
}
if page > pageTotal {
return -1, -1
}
if page == pageTotal {
return (page - 1) * pageSize, -1
}
n1 := (page - 1) * pageSize
n2 := page * pageSize
if n2 >= cnt {
n2 = -1
}
return n1, n2
}