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package libmkwebpage
import (
"bytes"
"embed"
"fmt"
"html/template"
"io/fs"
"net/http"
)
type templates struct {
staticRoot embed.FS
dynamicRoot fs.FS
errorTemplate string
bindings template.FuncMap
}
func (w *Webpage) getTemplateRoot() fs.FS {
if w.isDynamic() {
return w.templates.dynamicRoot
}
return w.templates.staticRoot
}
func (w *Webpage) NewTemplates(static embed.FS, dynamic fs.FS) *Webpage {
w.templates = templates{staticRoot: static, dynamicRoot: dynamic, bindings: template.FuncMap{}}
return w
}
func (w *Webpage) SetErrorTemplate(path string) {
w.templates.errorTemplate = path
}
func (w *Webpage) Error(writer http.ResponseWriter, code int, err error) {
writer.WriteHeader(code)
if w.templates.errorTemplate == "" {
fmt.Fprintln(writer, err)
}
}
func (w *Webpage) InternalServerError(writer http.ResponseWriter, err error) {
w.Error(writer, http.StatusInternalServerError, err)
}
func (w *Webpage) BadRequest(writer http.ResponseWriter, err error) {
w.Error(writer, http.StatusInternalServerError, err)
}
func (w *Webpage) BindTemplateFunc(name string, fun any) *Webpage {
w.templates.bindings[name] = fun
return w
}
func (w *Webpage) RenderTemplate(writer http.ResponseWriter, name string, data any) {
writer.Header().Set("Content-Type", "text/html; charset=utf-8")
tmpl, err := fs.ReadFile(w.getTemplateRoot(), "templates/"+name+".tmpl")
if err != nil {
panic(err)
}
if err := template.Must(template.New("templates/"+name+".tmpl").Funcs(w.templates.bindings).Parse(string(tmpl))).Execute(writer, data); err != nil {
panic(err)
}
}
func (w *Webpage) RenderTemplateToString(name string, data any) string {
buf := bytes.NewBuffer(nil)
tmpl, err := fs.ReadFile(w.getTemplateRoot(), "templates/"+name+".tmpl")
if err != nil {
panic(err)
}
if err := template.Must(template.New("templates/"+name+".tmpl").Funcs(w.templates.bindings).Parse(string(tmpl))).Execute(buf, data); err != nil {
panic(err)
}
return buf.String()
}
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