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mainSitemap.go
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/
mainSitemap.go
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package sitemap
import (
"encoding/xml"
"time"
)
const (
headerXmlns = "http://www.sitemaps.org/schemas/sitemap/0.9"
)
// Those values represent the posible change frequences
const (
Always ChangeFreq = "always"
Hourly ChangeFreq = "hourly"
Daily ChangeFreq = "daily"
Weekly ChangeFreq = "weekly"
Monthly ChangeFreq = "monthly"
Yearly ChangeFreq = "yearly"
Never ChangeFreq = "never"
)
// ChangeFreq is a type to only permit coerant choice
type ChangeFreq string
// Page is the XML page
type Page struct {
// Set the name of the element
XMLName xml.Name `xml:"urlset"`
Urlset []*Sitemap `xml:"url"`
Xmlns string `xml:"xmlns,attr"`
}
// GetXML return the corresponding sitemap XML
func (p *Page) GetXML() ([]byte, error) {
// Add the sitemap attribut
p.Xmlns = headerXmlns
// Marshal the object to bytes
return getXML(xml.Marshal(p))
}
// IndexPage represent the sitemap index element
type IndexPage struct {
Page
// Set the name of the element
XMLName xml.Name `xml:"sitemapindex"`
Urlset []*Sitemap `xml:"sitemap"`
}
// GetXML return the corresponding sitemap XML
func (p *IndexPage) GetXML() ([]byte, error) {
// Add the sitemap attribut
p.Xmlns = headerXmlns
// Marshal the object to bytes
return getXML(xml.Marshal(p))
}
// Sitemap is actualy the real sitemap element
type Sitemap struct {
Loc string `xml:"loc"`
LastMod *time.Time `xml:"lastmod,omitempty"`
Changefreq ChangeFreq `xml:"changefreq,omitempty"`
Priority float32 `xml:"priority,omitempty"`
}
// This function is a convergent function as workaround for subclasses
func getXML(retXML []byte, err error) ([]byte, error) {
if err != nil {
return nil, err
}
// Add the XML header at the first place and concat the rest of the XML export
ret := []byte(xml.Header)
ret = append(ret, retXML...)
return ret, nil
}