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package utils
import (
"fmt"
"math"
"math/rand"
"strings"
"time"
)
type Misc struct{}
func NewMisc() *Misc {
return &Misc{}
}
func (m *Misc) RandString(strlen int) string {
codes := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
codeLen := len(codes)
data := make([]byte, strlen)
rand.Seed(time.Now().UnixNano() + rand.Int63() + rand.Int63() + rand.Int63() + rand.Int63())
for i := 0; i < strlen; i++ {
idx := rand.Intn(codeLen)
data[i] = byte(codes[idx])
}
return string(data)
}
//根据slice随机返回其中一个元素
func (m *Misc) RandSlice(slices []interface{}) interface{} {
number := len(slices)
rand.Seed(time.Now().Unix())
idx := rand.Intn(number)
return slices[idx]
}
/**
* 分页方法
* @param type $total 一共多少记录
* @param type $page 当前是第几页
* @param type $pagesize 每页多少
* @param type $url url是什么,url里面的{page}会被替换成页码
* @param array $order 分页条的组成,是一个数组,可以按着1-6的序号,选择分页条组成部分和每个部分的顺序
* @param int $a_count 分页条中a页码链接的总数量,不包含当前页的a标签,默认10个。
* @return type String
* echo Sr::page(100,3,10,'?article/list/{page}',array(3,4,5,1,2,6));
*/
func (m *Misc) Page(total, page, pagesize int, url string, args ...interface{}) string {
order := []int{1, 2, 3, 4, 5, 6}
a_count := 10
if len(args) >= 1 {
order = args[0].([]int)
}
if len(args) >= 2 {
a_count = args[1].(int)
}
a_num := a_count
first := "首页"
last := "尾页"
pre := "上页"
next := "下页"
if a_num%2 == 0 {
a_num++
}
pages := int(math.Ceil(float64(total) / float64(pagesize)))
curpage := page
if curpage > pages || curpage <= 0 {
curpage = 1
}
body := `<span class="page_body">`
prefix := ""
subfix := ""
start := curpage - ((a_num - 1) / 2)
end := curpage + ((a_num - 1) / 2)
if start <= 0 {
start = 1
}
if end > pages {
end = pages
}
if pages >= a_num {
if curpage <= (a_num-1)/2 {
end = a_num
}
if end-curpage <= (a_num-1)/2 {
start -= int(math.Floor(float64(a_num)/float64(2))) - (end - curpage)
}
}
for i := start; i <= end; i++ {
if i == curpage {
body += fmt.Sprintf(`<a class="page_cur_page" href="javascript:void(0);"><b>%d</b></a>`, i)
} else {
body += fmt.Sprintf(`<a href="%s">%d</a>`, strings.Replace(url, "{page}", fmt.Sprintf("%d", i), 1), i)
}
}
body += "</span>"
if curpage > 1 {
prefix = fmt.Sprintf(`<span class="page_bar_prefix"><a href="%s">%s</a><a href="%s">%s</a></span>`, strings.Replace(url, "{page}", fmt.Sprintf("%d", 1), 1), first, strings.Replace(url, "{page}", fmt.Sprintf("%d", curpage-1), 1), pre)
}
if curpage != pages {
subfix = fmt.Sprintf(`<span class="page_bar_subfix"><a href="%s">%s</a><a href="%s">%s</a></span>`, strings.Replace(url, "{page}", fmt.Sprintf("%d", curpage+1), 1), next, strings.Replace(url, "{page}", fmt.Sprintf("%d", pages), 1), last)
}
info := fmt.Sprintf(`<span class="page_cur">第%d/%d页</span>`, curpage, pages)
id := fmt.Sprintf("gsd09fhas9d%d%d%d", rand.Intn(1000), rand.Intn(1000), rand.Intn(1000))
gostr := fmt.Sprintf(`<script>function ekup(){if(event.keyCode==13){clkyup();}}function clkyup(){var num=document.getElementById('%s').value;if(!/^\d+$/.test(num)||num<=0||num>%d){alert('请输入正确页码!');return;};location='%s'.replace(/\{page\}/,document.getElementById('%s').value);}</script><span class="page_input_num"><input onkeyup="ekup()" type="text" id="%s" style="width:40px;vertical-align:text-baseline;padding:0 2px;font-size:10px;border:1px solid gray;"/></span><span class="page_btn_go" onclick="clkyup();" style="cursor:pointer;">转到</span>`, id, pages, url, id, id)
totalstr := fmt.Sprintf(`<span class="page_total">共%d条</span>`, total)
pagenation := []string{totalstr, info, prefix, body, subfix, gostr}
output := []string{}
for _, v := range order {
if v-1 < len(pagenation) && v-1 >= 0 {
output = append(output, pagenation[v-1])
}
}
if pages > 1 {
return strings.Join(output, "")
}
return ""
}
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