Initial commit

service/template/data.go

@@ -0,0 +1,19 @@
+package template
+
+// Data is some data to inject into the template
+type Data map[string]interface{}
+
+// DataExtFunc is some extensions to a template's data
+type DataExtFunc func(data Data) (Data, error)
+
+// Extend returns a template's data with the given extensions
+func Extend(data Data, extensions ...DataExtFunc) (Data, error) {
+	var err error
+	for _, ext := range extensions {
+		data, err = ext(data)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return data, nil
+}

service/template/service.go

@@ -0,0 +1,38 @@
+package template
+
+import (
+	"net/http"
+
+	"forge.cadoles.com/wpetit/goweb/service"
+	"github.com/pkg/errors"
+)
+
+// ServiceName defines the Tempate service name
+const ServiceName service.Name = "template"
+
+// Service is a templating service
+type Service interface {
+	RenderPage(w http.ResponseWriter, templateName string, data interface{}) error
+}
+
+// From retrieves the template service in the given container
+func From(container *service.Container) (Service, error) {
+	service, err := container.Service(ServiceName)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error while retrieving '%s' service", ServiceName)
+	}
+	templateService, ok := service.(Service)
+	if !ok {
+		return nil, errors.Errorf("retrieved service is not a valid '%s' service", ServiceName)
+	}
+	return templateService, nil
+}
+
+// Must retrieves the template service in the given container or panic otherwise
+func Must(container *service.Container) Service {
+	service, err := From(container)
+	if err != nil {
+		panic(err)
+	}
+	return service
+}