20 days of unstoppable work. Waiting fo go 1.8, I didn't finish yet, some touches remains.

Former-commit-id: ed84f99c89f43fe5e980a8e6d0ee22c186f0e1b9

adaptors/view/handlebars.go

@@ -0,0 +1,62 @@
+package view
+
+import (
+	"github.com/kataras/go-template/handlebars"
+)
+
+// HandlebarsAdaptor is the  adaptor for the Handlebars engine.
+// Read more about the Handlebars Go Template at:
+// https://github.com/aymerick/raymond
+// and https://github.com/kataras/go-template/tree/master/handlebars
+type HandlebarsAdaptor struct {
+	*Adaptor
+	engine *handlebars.Engine
+}
+
+// Handlebars returns a new kataras/go-template/handlebars template engine
+// with the same features as all iris' view engines have:
+// Binary assets load (templates inside your executable with .go extension)
+// Layout, Funcs, {{ url }} {{ urlpath}} for reverse routing and much more.
+//
+// Read more: https://github.com/aymerick/raymond
+func Handlebars(directory string, extension string) *HandlebarsAdaptor {
+	e := handlebars.New()
+	return &HandlebarsAdaptor{
+		Adaptor: NewAdaptor(directory, extension, e),
+		engine:  e,
+	}
+}
+
+// Layout sets the layout template file which inside should use
+// the {{ yield }} func to yield the main template file
+// and optionally {{partial/partial_r/render}} to render other template files like headers and footers
+//
+// The 'tmplLayoutFile' is a relative path of the templates base directory,
+// for the template file whith its extension.
+//
+// Example: Handlebars("./templates", ".html").Layout("layouts/mainLayout.html")
+//         // mainLayout.html is inside: "./templates/layouts/".
+//
+// Note: Layout can be changed for a specific call
+// action with the option: "layout" on the Iris' context.Render function.
+func (h *HandlebarsAdaptor) Layout(tmplLayoutFile string) *HandlebarsAdaptor {
+	h.engine.Config.Layout = tmplLayoutFile
+	return h
+}
+
+// Funcs adds the elements of the argument map to the template's function map.
+// It is legal to overwrite elements of the default actions:
+// - url func(routeName string, args ...string) string
+// - urlpath func(routeName string, args ...string) string
+// - and handlebars specific, read more: https://github.com/aymerick/raymond.
+func (h *HandlebarsAdaptor) Funcs(funcMap map[string]interface{}) *HandlebarsAdaptor {
+	if funcMap == nil {
+		return h
+	}
+
+	for k, v := range funcMap {
+		h.engine.Config.Helpers[k] = v
+	}
+
+	return h
+}