Add a basic package page. (#1448)

* Add a basic package page.
Fixes #1444

* Address review comments.

packages/site-client/src/pages/element/wco-element-page.ts

@@ -31,13 +31,6 @@ export class WCOElementPage extends WCOPage {
   static styles = [
     WCOPage.styles,
     css`
-      .full-screen-error {
-        display: flex;
-        flex: 1;
-        align-items: center;
-        justify-items: center;
-      }
-
       main {
         display: grid;
         max-width: var(--content-width);
@@ -90,7 +83,7 @@ export class WCOElementPage extends WCOPage {
 
   renderContent() {
     if (this.elementData === undefined) {
-      return html`<div class="full-screen-error">No element to display</div>`;
+      return this.fullScreenError('No element to display');
     }
     const {
       packageName,
@@ -131,7 +124,8 @@ export class WCOElementPage extends WCOPage {
         <div id="logo-container"><div id="logo"></div></div>
         <div id="meta-container">
           <span id="package-meta"
-            >${packageName}<select>
+            ><a href="/catalog/package/${packageName}">${packageName}</a
+            ><select>
               <!-- TODO (justinfagnani): get actual version and dist tag data -->
               <option>x.x.x</option>
             </select></span

packages/site-client/src/pages/package/boot.ts

@@ -0,0 +1,19 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import 'lit/experimental-hydrate-support.js';
+import {hydrate} from 'lit/experimental-hydrate.js';
+import {renderPackagePage} from './shell.js';
+
+const data = (
+  globalThis as unknown as {__ssrData: Parameters<typeof renderPackagePage>}
+).__ssrData;
+
+// We need to hydrate the whole page to remove any defer-hydration attributes.
+// We could also remove the attribute manually, or not use deferhydration, but
+// instead manually assign the data into the <wco-package-page> element, and
+// time imports so that automatic element hydration happend after.
+hydrate(renderPackagePage(...data), document.body);

packages/site-client/src/pages/package/shell.ts

@@ -0,0 +1,12 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import './wco-package-page.js';
+import type {PackageData} from './wco-package-page.js';
+import {html} from 'lit';
+
+export const renderPackagePage = (packageData: PackageData) =>
+  html`<wco-package-page .packageData=${packageData}></wco-package-page>`;

packages/site-client/src/pages/package/wco-package-page.ts

@@ -0,0 +1,68 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import {CustomElement} from '@webcomponents/catalog-api/lib/_schema.js';
+import {html, css} from 'lit';
+import {customElement, property} from 'lit/decorators.js';
+import {unsafeHTML} from 'lit/directives/unsafe-html.js';
+
+import {WCOPage} from '../../shared/wco-page.js';
+import '../catalog/wco-element-card.js';
+
+export interface PackageData {
+  name: string;
+  description: string;
+  version: string;
+  elements: CustomElement[];
+}
+
+@customElement('wco-package-page')
+export class WCOPackagePage extends WCOPage {
+  static styles = [
+    WCOPage.styles,
+    css`
+      h1 {
+        display: inline-block;
+      }
+      .elements {
+        display: grid;
+        grid-template-columns: repeat(4, 200px);
+        grid-template-rows: auto;
+        grid-auto-columns: 200px;
+        grid-auto-rows: 200px;
+        gap: 8px;
+      }
+    `,
+  ];
+
+  @property({attribute: false})
+  packageData?: PackageData;
+
+  renderContent() {
+    if (this.packageData === undefined) {
+      return this.fullScreenError('No package to display');
+    }
+
+    return html`
+      <div>
+        <h1>${this.packageData.name}</h1>
+        v${this.packageData.version}
+      </div>
+      <div>${unsafeHTML(this.packageData.description)}</div>
+      <div class="elements">
+        ${this.packageData.elements.map((e) => {
+          return html`<wco-element-card .element=${e}></wco-element-card>`;
+        })}
+      </div>
+    `;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'wco-package-page': WCOPackagePage;
+  }
+}

packages/site-client/src/shared/wco-page.ts

@@ -31,6 +31,13 @@ export class WCOPage extends LitElement {
     wco-footer {
       width: 100%;
     }
+
+    .full-screen-error {
+      display: flex;
+      flex: 1;
+      align-items: center;
+      justify-items: center;
+    }
   `;
 
   render() {
@@ -48,6 +55,10 @@ export class WCOPage extends LitElement {
   protected renderContent() {
     return html`<slot></slot>`;
   }
+
+  protected fullScreenError(message: unknown) {
+    return html`<div class="full-screen-error">${message}</div>`;
+  }
 }
 
 declare global {

packages/site-server/src/lib/catalog/router.ts

@@ -8,6 +8,7 @@ import Router from '@koa/router';
 import {handleCatalogRoute} from './routes/catalog/catalog-route.js';
 import {handleCatalogSearchRoute} from './routes/catalog/search-route.js';
 import {handleElementRoute} from './routes/element/element-route.js';
+import {handlePackageRoute} from './routes/package/package-route.js';
 // import cors from '@koa/cors';
 
 export const catalogRouter = new Router();
@@ -19,3 +20,5 @@ catalogRouter.get('/', handleCatalogRoute);
 catalogRouter.get('/search', handleCatalogSearchRoute);
 
 catalogRouter.get('/element/:path+', handleElementRoute);
+
+catalogRouter.get('/package/:name+', handlePackageRoute);

packages/site-server/src/lib/catalog/routes/package/package-route.ts

@@ -0,0 +1,96 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This must be imported before lit
+import {renderPage} from '@webcomponents/internal-site-templates/lib/base.js';
+
+import {DefaultContext, DefaultState, ParameterizedContext} from 'koa';
+import {Readable} from 'stream';
+import {gql} from '@apollo/client/core/index.js';
+import Router from '@koa/router';
+
+import {renderPackagePage} from '@webcomponents/internal-site-client/lib/pages/package/shell.js';
+import {client} from '../../graphql.js';
+import {PackageData} from '@webcomponents/internal-site-client/lib/pages/package/wco-package-page.js';
+import {marked} from 'marked';
+
+export const handlePackageRoute = async (
+  context: ParameterizedContext<
+    DefaultState,
+    DefaultContext & Router.RouterParamContext<DefaultState, DefaultContext>,
+    unknown
+  >
+) => {
+  const {params} = context;
+
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  const packageName = params['name']!;
+
+  // TODO (justinfagnani): To make this type-safe, we need to write
+  // a query .graphql document and generate a TypedDocumentNode from it.
+  const result = await client.query({
+    query: gql`{
+      package(packageName: "${packageName}") {
+        ... on ReadablePackageInfo {
+          name
+          description
+          version {
+            ... on ReadablePackageVersion {
+              version
+              description
+              customElements {
+                tagName
+                package
+                declaration
+                customElementExport
+                declaration
+              }
+            }
+          }
+        }
+      }
+    }`,
+  });
+
+  if (result.errors !== undefined && result.errors.length > 0) {
+    throw new Error(result.errors.map((e) => e.message).join('\n'));
+  }
+  const {data} = result;
+  const packageVersion = data.package?.version;
+  if (packageVersion === undefined) {
+    // TODO: 404
+    throw new Error(`No such package version: ${packageName}`);
+  }
+
+  // Set location because wco-nav-bar reads pathname from it. URL isn't
+  // exactly a Location, but it's close enough for read-only uses
+  globalThis.location = new URL(context.URL.href) as unknown as Location;
+
+  const responseData: PackageData = {
+    name: packageName,
+    description: marked(data.package.description ?? ''),
+    version: packageVersion.version,
+    elements: packageVersion.customElements,
+  };
+
+  context.type = 'html';
+  context.status = 200;
+  context.body = Readable.from(
+    renderPage(
+      {
+        title: `${packageName}`,
+        initScript: '/js/package/boot.js',
+        content: renderPackagePage(responseData),
+        initialData: [responseData],
+      },
+      {
+        // We need to defer elements from hydrating so that we can
+        // manually provide data to the element in element-hydrate.js
+        deferHydration: true,
+      }
+    )
+  );
+};