Merge pull request #48 from stackabletech/versioned-links-helper

Added helper to version links in the menu

Author: fhennig

src/helpers/versioned.js

@@ -0,0 +1,18 @@
+// A helper to generate the correct link stub from the current page.
+// if we're already in the same component, generate a link that links to the same version too.
+// targetComponentName: string - name of the component where to link to
+// pageInfo: Object - the 'page' template object: https://docs.antora.org/antora-ui-default/templates
+// path: string - the rest of the link path, inside the target component
+module.exports = (targetComponentName, pageInfo, path) => {
+  // if either the current page is not part of the component or of a different component
+  // or of the same component with the latest version, link to the component and to 'stable',
+  // the latest version
+  if ((pageInfo.component === undefined) ||
+      (targetComponentName !== pageInfo.component.name) ||
+      (pageInfo.version === pageInfo.component.latest.version)) {
+    return '/' + targetComponentName + '/stable/' + path
+  // otherwise, link to the current version.
+  } else {
+    return '/' + targetComponentName + '/' + pageInfo.version + '/' + path
+  }
+}