初版

定时任务管理

libs/pager.go

@@ -0,0 +1,120 @@
+/*
+* @Author: haodaquan
+* @Date:   2017-06-21 13:10:05
+* @Last Modified by:   haodaquan
+* @Last Modified time: 2017-06-21 13:10:15
+ */
+
+package libs
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+	"strings"
+)
+
+type Pager struct {
+	Page     int
+	Totalnum int
+	Pagesize int
+	urlpath  string
+	urlquery string
+	nopath   bool
+}
+
+func NewPager(page, totalnum, pagesize int, url string, nopath ...bool) *Pager {
+	p := new(Pager)
+	p.Page = page
+	p.Totalnum = totalnum
+	p.Pagesize = pagesize
+
+	arr := strings.Split(url, "?")
+	p.urlpath = arr[0]
+	if len(arr) > 1 {
+		p.urlquery = "?" + arr[1]
+	} else {
+		p.urlquery = ""
+	}
+
+	if len(nopath) > 0 {
+		p.nopath = nopath[0]
+	} else {
+		p.nopath = false
+	}
+
+	return p
+}
+
+func (this *Pager) url(page int) string {
+	if this.nopath { //不使用目录形式
+		if this.urlquery != "" {
+			return fmt.Sprintf("%s%s&page=%d", this.urlpath, this.urlquery, page)
+		} else {
+			return fmt.Sprintf("%s?page=%d", this.urlpath, page)
+		}
+	} else {
+		return fmt.Sprintf("%s/page/%d%s", this.urlpath, page, this.urlquery)
+	}
+}
+
+func (this *Pager) ToString() string {
+	if this.Totalnum <= this.Pagesize {
+		return ""
+	}
+
+	var buf bytes.Buffer
+	var from, to, linknum, offset, totalpage int
+
+	offset = 5
+	linknum = 10
+
+	totalpage = int(math.Ceil(float64(this.Totalnum) / float64(this.Pagesize)))
+
+	if totalpage < linknum {
+		from = 1
+		to = totalpage
+	} else {
+		from = this.Page - offset
+		to = from + linknum
+		if from < 1 {
+			from = 1
+			to = from + linknum - 1
+		} else if to > totalpage {
+			to = totalpage
+			from = totalpage - linknum + 1
+		}
+	}
+
+	buf.WriteString("<ul class=\"pagination\">")
+	if this.Page > 1 {
+		buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">&laquo;</a></li>", this.url(this.Page-1)))
+	} else {
+		buf.WriteString("<li class=\"disabled\"><a href=\"#\" aria-label=\"Previous\"><span aria-hidden=\"true\">&laquo;</span></a></li>")
+	}
+
+	if this.Page > linknum {
+		buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">1...</a></li>", this.url(1)))
+	}
+
+	for i := from; i <= to; i++ {
+		if i == this.Page {
+			buf.WriteString(fmt.Sprintf("<li class=\"active\"><a href=\"#\">%d</a></li>", i))
+		} else {
+			buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">%d</a></li>", this.url(i), i))
+		}
+	}
+
+	if totalpage > to {
+		buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">...%d</a></li>", this.url(totalpage), totalpage))
+	}
+
+	if this.Page < totalpage {
+		buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">&raquo;</a></li>", this.url(this.Page+1)))
+	} else {
+		buf.WriteString(fmt.Sprintf("<li class=\"disabled\"><a href=\"#\" aria-label=\"Next\"><span aria-hidden=\"true\">&raquo;</span></a></li>"))
+	}
+	buf.WriteString("</ul>")
+
+	return buf.String()
+}