fix(components): LinkToExternal retake (#2867)

Co-authored-by: Cristiano Rastelli <cristiano.rastelli@hashicorp.com>

Author: aklkv

.changeset/tall-rings-act.md

@@ -0,0 +1,5 @@
+---
+'@hashicorp/design-system-components': patch
+---
+
+Introduce the `hds-resolve-link-to-component` utility to correctly resolve the LinkTo component when `@isRouteExternal` is set on `HdsBreadcrumbItem` or `HdsInteractive`. Consumers are now required to install `ember-engines` when `@isRouteExternal` is `true`.

packages/components/package.json

@@ -118,6 +118,14 @@
     "typescript-eslint": "^8.29.0",
     "webpack": "^5.97.1"
   },
+  "peerDependencies": {
+    "ember-engines": ">= 0.11.0"
+  },
+  "peerDependenciesMeta": {
+    "ember-engines": {
+      "optional": true
+    }
+  },
   "ember": {
     "edition": "octane"
   },

packages/components/src/components/hds/breadcrumb/item.hbs

@@ -14,7 +14,7 @@
     </div>
   {{else}}
     {{#if @isRouteExternal}}
-      <LinkToExternal
+      <this.linkToExternal
         class="hds-breadcrumb__link"
         @current-when={{@current-when}}
         @models={{hds-link-to-models @model @models}}
@@ -28,7 +28,7 @@
           </div>
         {{/if}}
         <span class="hds-breadcrumb__text">{{@text}}</span>
-      </LinkToExternal>
+      </this.linkToExternal>
     {{else}}
       <LinkTo
         class="hds-breadcrumb__link"

packages/components/src/components/hds/breadcrumb/item.ts

@@ -4,10 +4,16 @@
  */
 
 import Component from '@glimmer/component';
+import { tracked } from '@glimmer/tracking';
 import { htmlSafe } from '@ember/template';
 import { assert } from '@ember/debug';
+
+import { hdsResolveLinkToExternal } from '../../../utils/hds-resolve-link-to-external.ts';
+
+import type Owner from '@ember/owner';
+import type { LinkTo } from '@ember/routing';
 import type { SafeString } from '@ember/template';
-import type { HdsIconSignature } from '../icon';
+import type { HdsIconSignature } from '../icon/index';
 
 export interface HdsBreadcrumbItemSignature {
   Args: {
@@ -27,6 +33,23 @@ export interface HdsBreadcrumbItemSignature {
 }
 
 export default class HdsBreadcrumbItem extends Component<HdsBreadcrumbItemSignature> {
+  @tracked linkToExternal: LinkTo | null = null;
+
+  constructor(owner: Owner, args: HdsBreadcrumbItemSignature['Args']) {
+    super(owner, args);
+
+    // we want to avoid resolving the component if it's not needed
+    if (args.isRouteExternal) {
+      void this.resolveLinkToExternal();
+    }
+  }
+
+  async resolveLinkToExternal() {
+    this.linkToExternal = await hdsResolveLinkToExternal(
+      this.args.isRouteExternal
+    );
+  }
+
   /**
    * @param maxWidth
    * @type {string}

packages/components/src/components/hds/interactive/index.hbs

@@ -3,14 +3,14 @@
 {{! NOTICE: we can't support the direct use of the "href" HTML attribute via ...attributes in the <a> elements, because we need to rely on the "@href" Ember argument to differentiate between different types of generated output }}
 {{~#if @route~}}
   {{~#if this.isRouteExternal~}}
-    <LinkToExternal
+    <this.linkToExternal
       @current-when={{@current-when}}
       @models={{hds-link-to-models @model @models}}
       @query={{hds-link-to-query @query}}
       @replace={{@replace}}
       @route={{@route}}
       ...attributes
-    >{{yield}}</LinkToExternal>
+    >{{yield}}</this.linkToExternal>
   {{~else~}}
     <LinkTo
       @current-when={{@current-when}}

packages/components/src/components/hds/interactive/index.ts

@@ -4,8 +4,14 @@
  */
 
 import Component from '@glimmer/component';
+import { tracked } from '@glimmer/tracking';
 import { action } from '@ember/object';
 
+import { hdsResolveLinkToExternal } from '../../../utils/hds-resolve-link-to-external.ts';
+
+import type Owner from '@ember/owner';
+import type { LinkTo } from '@ember/routing';
+
 export interface HdsInteractiveSignature {
   Args: {
     href?: string;
@@ -27,6 +33,22 @@ export interface HdsInteractiveSignature {
 }
 
 export default class HdsInteractive extends Component<HdsInteractiveSignature> {
+  @tracked linkToExternal: LinkTo | null = null;
+
+  constructor(owner: Owner, args: HdsInteractiveSignature['Args']) {
+    super(owner, args);
+
+    // we want to avoid resolving the component if it's not needed
+    if (args.isRouteExternal) {
+      void this.resolveLinkToExternal();
+    }
+  }
+
+  async resolveLinkToExternal() {
+    this.linkToExternal = await hdsResolveLinkToExternal(
+      this.args.isRouteExternal
+    );
+  }
   /**
    * Determines if a @href value is "external" (it adds target="_blank" rel="noopener noreferrer")
    *

packages/components/src/utils/hds-resolve-link-to-external.ts

@@ -0,0 +1,31 @@
+import { LinkTo } from '@ember/routing';
+import { assert } from '@ember/debug';
+
+/**
+ * Resolves the correct component to use for the `LinkTo`.
+ *
+ * @param isRouteExternal - If true, will return the `LinkToExternal` component. If `ember-engines` is not installed, an assertion will be thrown.
+ * @returns A promise resolving to the correct component to use for the `LinkTo`.
+ */
+export async function hdsResolveLinkToExternal(
+  isRouteExternal?: boolean
+): Promise<typeof LinkTo> {
+  if (isRouteExternal) {
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+      const mod = await import(
+        // @ts-expect-error: we list this as optional peer dependency
+        'ember-engines/components/link-to-external-component'
+      );
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      return mod.default as typeof LinkTo;
+    } catch {
+      assert(
+        `@isRouteExternal is only available when using the "ember-engines" addon. Please install it to use this feature.`,
+        false
+      );
+    }
+  }
+
+  return LinkTo;
+}

packages/components/unpublished-development-types/global.d.ts

@@ -1,7 +1,6 @@
 import '@glint/environment-ember-loose';
 import '@glint/environment-ember-template-imports';
 
-import { LinkTo } from '@ember/routing';
 import { Portal, PortalTarget } from 'ember-stargate';
 
 import type HdsComponentsRegistry from '../src/template-registry';
@@ -25,7 +24,6 @@ declare module '@glint/environment-ember-loose/registry' {
       RenderModifiersRegistry,
       EmbroiderUtilRegistry /*, other addon registries */ {
     // local entries
-    LinkToExternal: typeof LinkTo;
     Portal: typeof Portal;
     PortalTarget: typeof PortalTarget;
     'sort-by': HelperLike<{