newsbox/actions/render.go

package actions

import (
	"bytes"
	"newsbox/public"
	"newsbox/templates"
	"text/template"

	"github.com/gobuffalo/buffalo/render"
)

var r *render.Engine

func init() {
	r = render.New(render.Options{
		// HTML layout to be used for all HTML requests:
		HTMLLayout: "application.plush.html",

		TemplateEngines: map[string]render.TemplateEngine{
			".tmpl": GoTemplateEngine,
		},

		// fs.FS containing templates
		TemplatesFS: templates.FS(),

		// fs.FS containing assets
		AssetsFS: public.FS(),

		// Add template helpers here:
		Helpers: render.Helpers{
			// for non-bootstrap form helpers uncomment the lines
			// below and import "github.com/gobuffalo/helpers/forms"
			// forms.FormKey:     forms.Form,
			// forms.FormForKey:  forms.FormFor,
		},
	})
}

func GoTemplateEngine(input string, data map[string]interface{}, helpers map[string]interface{}) (string, error) {
	// since go templates don't have the concept of an optional map argument like Plush does
	// add this "null" map so it can be used in templates like this:
	// {{ partial "flash.html" .nilOpts }}
	data["nilOpts"] = map[string]interface{}{}

	t := template.New(input)
	if helpers != nil {
		t = t.Funcs(helpers)
	}

	t, err := t.Parse(input)
	if err != nil {
		return "", err
	}

	bb := &bytes.Buffer{}
	err = t.Execute(bb, data)
	return bb.String(), err
}