feat: Add container breadcrumbs.

config/util/representation-conversion/converters/markdown.json

@@ -23,7 +23,8 @@
         "@type": "HandlebarsTemplateEngine",
         "template": "$PACKAGE_ROOT/templates/container.md.hbs"
       },
-      "contentType": "text/markdown"
+      "contentType": "text/markdown",
+      "identifierStrategy": { "@id": "urn:solid-server:default:IdentifierStrategy" }
     }
   ]
 }

src/storage/conversion/ContainerToTemplateConverter.ts

@@ -3,8 +3,10 @@ import orderBy from 'lodash.orderby';
 import type { Quad } from 'rdf-js';
 import { BasicRepresentation } from '../../ldp/representation/BasicRepresentation';
 import type { Representation } from '../../ldp/representation/Representation';
+import type { ResourceIdentifier } from '../../ldp/representation/ResourceIdentifier';
 import { INTERNAL_QUADS } from '../../util/ContentTypes';
 import { NotImplementedHttpError } from '../../util/errors/NotImplementedHttpError';
+import type { IdentifierStrategy } from '../../util/identifiers/IdentifierStrategy';
 import { isContainerIdentifier, isContainerPath } from '../../util/PathUtil';
 import { endOfStream } from '../../util/StreamUtil';
 import type { TemplateEngine } from '../../util/templates/TemplateEngine';
@@ -22,13 +24,15 @@ interface ResourceDetails {
  * A {@link RepresentationConverter} that creates a templated representation of a container.
  */
 export class ContainerToTemplateConverter extends TypedRepresentationConverter {
+  private readonly identifierStrategy: IdentifierStrategy;
   private readonly templateEngine: TemplateEngine;
   private readonly contentType: string;
 
-  public constructor(templateEngine: TemplateEngine, contentType: string) {
+  public constructor(templateEngine: TemplateEngine, contentType: string, identifierStrategy: IdentifierStrategy) {
     super(INTERNAL_QUADS, contentType);
     this.templateEngine = templateEngine;
     this.contentType = contentType;
+    this.identifierStrategy = identifierStrategy;
   }
 
   public async canHandle(args: RepresentationConverterArgs): Promise<void> {
@@ -40,8 +44,11 @@ export class ContainerToTemplateConverter extends TypedRepresentationConverter {
 
   public async handle({ identifier, representation }: RepresentationConverterArgs): Promise<Representation> {
     const rendered = await this.templateEngine.render({
-      container: this.getLocalName(identifier.path),
-      children: await this.getChildResources(identifier.path, representation.data),
+      identifier: identifier.path,
+      name: this.getLocalName(identifier.path),
+      container: true,
+      children: await this.getChildResources(identifier, representation.data),
+      parents: this.getParentContainers(identifier),
     });
     return new BasicRepresentation(rendered, representation.metadata, this.contentType);
   }
@@ -49,11 +56,11 @@ export class ContainerToTemplateConverter extends TypedRepresentationConverter {
   /**
    * Collects the children of the container as simple objects.
    */
-  private async getChildResources(container: string, quads: Readable): Promise<ResourceDetails[]> {
+  private async getChildResources(container: ResourceIdentifier, quads: Readable): Promise<ResourceDetails[]> {
     // Collect the needed bits of information from the containment triples
     const resources = new Set<string>();
     quads.on('data', ({ subject, predicate, object }: Quad): void => {
-      if (subject.value === container && predicate.equals(LDP.terms.contains)) {
+      if (subject.value === container.path && predicate.equals(LDP.terms.contains)) {
         resources.add(object.value);
       }
     });
@@ -70,11 +77,28 @@ export class ContainerToTemplateConverter extends TypedRepresentationConverter {
     return orderBy(children, [ 'container', 'identifier' ], [ 'desc', 'asc' ]);
   }
 
+  /**
+   * Collects the ancestors of the container as simple objects.
+   */
+  private getParentContainers(container: ResourceIdentifier): ResourceDetails[] {
+    const parents = [];
+    let current = container;
+    while (!this.identifierStrategy.isRootContainer(current)) {
+      current = this.identifierStrategy.getParentContainer(current);
+      parents.push({
+        identifier: current.path,
+        name: this.getLocalName(current.path),
+        container: true,
+      });
+    }
+    return parents.reverse();
+  }
+
   /**
    * Derives a short name for the given resource.
    */
-  private getLocalName(iri: string, keepTrailingSlash = false): string {
-    const match = /:\/+[^/]+.*\/(([^/]+)\/?)$/u.exec(iri);
-    return match ? decodeURIComponent(match[keepTrailingSlash ? 1 : 2]) : '/';
+  private getLocalName(iri: string): string {
+    const match = /:\/+([^/]+).*?\/([^/]*)\/?$/u.exec(iri);
+    return match?.[2] ? decodeURIComponent(match[2]) : match?.[1] ?? iri;
   }
 }

templates/container.md.hbs

@@ -1,8 +1,15 @@
-# Contents of {{container}}
+# Contents of {{name}}
+<ol class="breadcrumbs">
+{{#each parents}}
+  <li class="container"><a href="{{identifier}}">{{name}}</a></li>
+{{/each}}
+  <li class="current container">{{name}}</li>
+</ol>
+
 <ul class="container">
 {{#each children}}
   <li class="{{#if container}}container{{else}}document{{/if}}">
-    <a href="{{identifier}}">{{name}}</a>
+    <a href="{{identifier}}">{{name}}{{#if container}}/{{/if}}</a>
   </li>
 {{/each}}
 </ul>

templates/styles/main.css

@@ -14,6 +14,7 @@
 html {
   --solid-purple: #7c4dff;
   --solid-blue: #18a9e6;
+  --solid-gray: #8a8a8a;
 
   height: 100%;
 
@@ -179,7 +180,36 @@ ul.container > li {
   margin: 0.25em 0;
   list-style-type: none;
 }
-
 ul.container > li.container > a {
   font-weight: 800;
 }
+
+ol.breadcrumbs {
+  list-style: none;
+  padding: 0;
+  font-size: 90%;
+}
+ol.breadcrumbs > li {
+  display: inline;
+}
+ol.breadcrumbs > li > a {
+  color: var(--solid-gray);
+  font-weight: 400;
+  white-space: nowrap;
+}
+ol.breadcrumbs > li > a:hover {
+  color: var(--solid-purple);
+}
+ol.breadcrumbs > li:not(:last-child):after {
+  padding: 0 .25em;
+  content: ' > ';
+  font-weight: 300;
+  color: var(--solid-gray);
+}
+ol.breadcrumbs > li:last-child {
+  font-weight: 500;
+  color: var(--solid-purple);
+}
+ol.breadcrumbs > li:only-child {
+  display: none;
+}

test/unit/storage/conversion/ContainerToTemplateConverter.test.ts

@@ -1,12 +1,14 @@
 import { namedNode as nn, quad } from '@rdfjs/data-model';
 import { BasicRepresentation } from '../../../../src/ldp/representation/BasicRepresentation';
 import { ContainerToTemplateConverter } from '../../../../src/storage/conversion/ContainerToTemplateConverter';
+import { SingleRootIdentifierStrategy } from '../../../../src/util/identifiers/SingleRootIdentifierStrategy';
 import { readableToString } from '../../../../src/util/StreamUtil';
 import type { TemplateEngine } from '../../../../src/util/templates/TemplateEngine';
 import { LDP, RDF } from '../../../../src/util/Vocabularies';
 
 describe('A ContainerToTemplateConverter', (): void => {
   const preferences = {};
+  const identifierStrategy = new SingleRootIdentifierStrategy('http://test.com/');
   let templateEngine: jest.Mocked<TemplateEngine>;
   let converter: ContainerToTemplateConverter;
 
@@ -14,7 +16,7 @@ describe('A ContainerToTemplateConverter', (): void => {
     templateEngine = {
       render: jest.fn().mockReturnValue(Promise.resolve('<html>')),
     };
-    converter = new ContainerToTemplateConverter(templateEngine, 'text/html');
+    converter = new ContainerToTemplateConverter(templateEngine, 'text/html', identifierStrategy);
   });
 
   it('supports containers.', async(): Promise<void> => {
@@ -38,7 +40,7 @@ describe('A ContainerToTemplateConverter', (): void => {
       quad(nn(container.path), LDP.terms.contains, nn(`${container.path}b`)),
       quad(nn(container.path), LDP.terms.contains, nn(`${container.path}a`)),
       quad(nn(container.path), LDP.terms.contains, nn(`${container.path}a`)),
-      quad(nn(container.path), LDP.terms.contains, nn(`${container.path}ccc`)),
+      quad(nn(container.path), LDP.terms.contains, nn(`${container.path}c%20c`)),
       quad(nn(container.path), LDP.terms.contains, nn(`${container.path}d/`)),
       quad(nn(`${container.path}d/`), LDP.terms.contains, nn(`${container.path}d`)),
     ], 'internal/quads', false);
@@ -50,11 +52,13 @@ describe('A ContainerToTemplateConverter', (): void => {
 
     expect(templateEngine.render).toHaveBeenCalledTimes(1);
     expect(templateEngine.render).toHaveBeenCalledWith({
-      container: 'my-container',
+      identifier: container.path,
+      name: 'my-container',
+      container: true,
       children: [
         {
           identifier: `${container.path}d/`,
-          name: 'd/',
+          name: 'd',
           container: true,
         },
         {
@@ -68,11 +72,28 @@ describe('A ContainerToTemplateConverter', (): void => {
           container: false,
         },
         {
-          identifier: `${container.path}ccc`,
-          name: 'ccc',
+          identifier: `${container.path}c%20c`,
+          name: 'c c',
           container: false,
         },
       ],
+      parents: [
+        {
+          identifier: 'http://test.com/',
+          name: 'test.com',
+          container: true,
+        },
+        {
+          identifier: 'http://test.com/foo/',
+          name: 'foo',
+          container: true,
+        },
+        {
+          identifier: 'http://test.com/foo/bar/',
+          name: 'bar',
+          container: true,
+        },
+      ],
     });
   });
 
@@ -88,8 +109,27 @@ describe('A ContainerToTemplateConverter', (): void => {
 
     expect(templateEngine.render).toHaveBeenCalledTimes(1);
     expect(templateEngine.render).toHaveBeenCalledWith({
-      container: '/',
+      identifier: container.path,
+      name: 'test.com',
+      container: true,
       children: expect.objectContaining({ length: 3 }),
+      parents: [],
+    });
+  });
+
+  it('converts an improperly named container.', async(): Promise<void> => {
+    const container = { path: 'http//test.com/foo/bar' };
+    const representation = new BasicRepresentation([], 'internal/quads', false);
+    jest.spyOn(identifierStrategy, 'isRootContainer').mockReturnValueOnce(true);
+    await converter.handle({ identifier: container, representation, preferences });
+
+    expect(templateEngine.render).toHaveBeenCalledTimes(1);
+    expect(templateEngine.render).toHaveBeenCalledWith({
+      identifier: container.path,
+      name: container.path,
+      container: true,
+      children: [],
+      parents: [],
     });
   });
 });