1 files changed, 60 insertions, 0 deletions
diff --git a/components/PathCrumbs/index.tsx b/components/PathCrumbs/index.tsx
new file mode 100644
index 0000000..1c87344
--- /dev/null
+++ b/components/PathCrumbs/index.tsx
@@ -0,0 +1,60 @@
+import React, { FC } from 'react';
+
+import assert from '../../utils/assert';
+import { DISPLAY_DOMAIN } from '../../utils/env';
+
+const urlPathComponents = (path : string): string[] => {
+  assert(path.length > 0, "empty path");
+
+  let canonicalizedPath = path[path.length - 1] === '/' ?
+    path.substr(0, path.length - 1) : path;
+
+  if(canonicalizedPath.length === 0) {
+    return [];
+  } else {
+    canonicalizedPath = canonicalizedPath[0] == '/' ?
+      path.substr(1, path.length - 1) : path;
+  }
+
+  return canonicalizedPath.split('/')
+}
+
+const urlPathComponentsToFullPath = (urlPathComponents : string[]): string[] => {
+  const fullPaths = new Array<string>(urlPathComponents.length + 1);
+
+  fullPaths[0] = '';
+
+  for(let i = 0; i < urlPathComponents.length; i++) {
+    fullPaths[i + 1] = fullPaths[i] + '/' + urlPathComponents[i];
+  }
+
+  fullPaths[0] = '/';
+
+  return fullPaths;
+};
+
+export type PathCrumbsProps = {
+  path: string
+};
+
+import { BreadCrumbs , LinkCrumb } from '../../components/BreadCrumbs';
+
+const PathCrumbs: FC<PathCrumbsProps> = ({ path }) => {
+
+  const pathComponents = urlPathComponents(path);
+  const fullPaths = urlPathComponentsToFullPath(pathComponents);
+
+  const linksComponents = fullPaths.map((fullPath, i) => (
+    <LinkCrumb href={fullPath} key={fullPath}>
+      { i === 0 ? DISPLAY_DOMAIN : pathComponents[i - 1] }
+    </LinkCrumb>
+  ));
+
+  return (
+    <BreadCrumbs>
+      {linksComponents}
+    </BreadCrumbs>
+  );
+};
+
+export default PathCrumbs;