package appimport (	"bytes"	"embed"	"fmt"	"html/template"	"io/fs"	"net/http"	"strings"	"time"	"github.com/nxrmqlly/district/auth"	"github.com/nxrmqlly/district/config")//go:embed templatesvar templatesFS embed.FStype PageContext struct {	Page    string	Title   string	Session *auth.AuthSession	Site    config.Site	Data    any}// for the custom {{ render .Name .Data }} directivefunc renderFunc(root *template.Template) func(string, any) (template.HTML, error) {	return func(name string, data any) (template.HTML, error) {		var buf bytes.Buffer		tmpl := root.Lookup(name)		if tmpl == nil {			return "", fmt.Errorf("template %q not found", name)		}		if err := tmpl.Execute(&buf, data); err != nil {			return "", err		}		return template.HTML(buf.String()), nil	}}func timeagoFunc(t time.Time) string {	d := time.Since(t)	switch {	case d < time.Minute:		return "just now"	case d < time.Hour:		return fmt.Sprintf("%dm ago", int(d.Minutes()))	case d < 24*time.Hour:		return fmt.Sprintf("%dh ago", int(d.Hours()))	case d < 30*24*time.Hour:		return fmt.Sprintf("%dd ago", int(d.Hours()/24))	default:		return t.Format("2 Jan 2006")	}}func parseTemplates() (*template.Template, error) {	root := template.New("")	root.Funcs(template.FuncMap{		"render":  renderFunc(root),		"timeago": timeagoFunc,	})	if err := fs.WalkDir(templatesFS, ".", func(path string, d fs.DirEntry, err error) error {		if err != nil {			return err		}		if d.IsDir() || !strings.HasSuffix(path, ".html") {			return nil		}		_, err = root.ParseFS(templatesFS, path)		return err	}); err != nil {		return nil, err	}	return root, nil}func (ro *Router) RenderPage(w http.ResponseWriter, r *http.Request, page, title string, data any) {	sess, _ := SessionFromContext(r.Context())	if err := ro.templates.ExecuteTemplate(w, "layout", PageContext{		Page:    page,		Title:   title,		Site:    config.Get().Site,		Session: sess,		Data:    data,	}); err != nil {		http.Error(w, err.Error(), http.StatusInternalServerError)		return	}}func (ro *Router) RenderFragment(w http.ResponseWriter, r *http.Request, component string, data any) {	if err := ro.templates.ExecuteTemplate(w, component, data); err != nil {		http.Error(w, err.Error(), http.StatusInternalServerError)		return	}}