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package main
import (
"context"
"fmt"
"html/template"
"net/http"
"time"
"github.com/Xe/ln"
analytics "gopkg.in/segmentio/analytics-go.v3"
)
func logTemplateTime(name string, from time.Time) {
now := time.Now()
ln.Log(context.Background(), ln.F{"action": "template_rendered", "dur": now.Sub(from).String(), "name": name})
}
func (s *Site) renderTemplatePage(templateFname string, data interface{}) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer logTemplateTime(templateFname, time.Now())
getTranslation := func(group, key string, vals ...interface{}) string {
var lc locale
var ok bool
locale, err := GetPreferredLocale(r)
if err != nil {
ln.Error(r.Context(), err)
lc = s.t.locales["en"]
goto overwith
}
lc, ok = s.t.Get(locale.Lang)
if !ok {
ln.Log(r.Context(), ln.F{"msg": "unknown language requested", "lang": locale.Lang, "header": r.Header.Get("Accept-Language")})
lc = s.t.locales["en"]
goto overwith
}
overwith:
return lc.Value(group, key, vals...)
}
funcMap := template.FuncMap{
"trans": getTranslation,
}
var t *template.Template = template.New(templateFname).Funcs(funcMap)
var err error
t, err = t.ParseFiles("templates/base.html", "templates/"+templateFname)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
ln.Error(context.Background(), err, ln.F{"action": "renderTemplatePage", "page": templateFname})
fmt.Fprintf(w, "error: %v", err)
}
err = t.Execute(w, data)
if err != nil {
panic(err)
}
})
}
func (s *Site) showPost(w http.ResponseWriter, r *http.Request) {
if r.RequestURI == "/blog/" {
http.Redirect(w, r, "/blog", http.StatusSeeOther)
return
}
var p *Post
for _, pst := range s.Posts {
if pst.Link == r.RequestURI[1:] {
p = pst
}
}
if p == nil {
w.WriteHeader(http.StatusNotFound)
s.renderTemplatePage("error.html", "no such post found: "+r.RequestURI).ServeHTTP(w, r)
return
}
s.renderTemplatePage("blogpost.html", p).ServeHTTP(w, r)
if s.segment != nil {
err := s.segment.Enqueue(analytics.Track{
UserId: Hash("h", r.Header.Get("X-Forwarded-For")),
Event: "Post Viewed",
Properties: analytics.NewProperties().SetURL(r.RequestURI).SetTitle(p.Title),
})
if err != nil {
ln.Error(r.Context(), err)
}
}
}
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