Split up WissKI Instance code

internal/component/instances/wisski_props.go

@@ -0,0 +1,29 @@
+package instances
+
+import (
+	"fmt"
+	"net/url"
+)
+
+// Domain returns the full domain name of this WissKI
+func (wisski WissKI) Domain() string {
+	return fmt.Sprintf("%s.%s", wisski.Slug, wisski.instances.Config.DefaultDomain)
+}
+
+// URL returns the public URL of this instance
+func (wisski WissKI) URL() *url.URL {
+	// setup domain and path
+	url := &url.URL{
+		Host: wisski.Domain(),
+		Path: "/",
+	}
+
+	// use http or https scheme depending on if the distillery has it enabled
+	if wisski.instances.Config.HTTPSEnabled() {
+		url.Scheme = "https"
+	} else {
+		url.Scheme = "http"
+	}
+
+	return url
+}