feat(JellyfinApiSource): add option to override the Jellyfin base url

src/backend/common/infrastructure/config/source/jellyfin.ts

@@ -87,6 +87,13 @@ export interface JellyApiData extends CommonSourceData {
     * @default false
     */
     allowUnknown?: boolean
+
+    /**
+     * HOST:PORT of the Jellyfin server that your browser will be able to access from the frontend (and thus load images and links from)
+     * If unspecified it will use the normal server HOST and PORT from the `url`
+     * Necessary if you are using a reverse proxy or other network configuration that prevents the frontend from accessing the server directly
+     * */
+    frontendUrlOverride?: string
 }
 
 export interface JellyApiOptions extends CommonSourceOptions {

src/backend/sources/JellyfinApiSource.ts

@@ -378,6 +378,14 @@ export default class JellyfinApiSource extends MemoryPositionalSource {
         if(AlbumId !== undefined && AlbumPrimaryImageTag !== undefined) {
             const existingArt = play.meta?.art || {};
             existingArt.album = this.imageApi.getItemImageUrlById(AlbumId, undefined, {maxHeight: 500});
+            if(
+                this.config.data.frontendUrlOverride !== undefined &&
+                this.config.data.frontendUrlOverride.length > 0 &&
+                existingArt.album !== undefined &&
+                existingArt.album.length > 0
+            ) {
+                existingArt.album = existingArt.album.replace(this.config.data.url, this.config.data.frontendUrlOverride);
+            }
             play.meta.art = existingArt;
         }
         if(ParentId !== undefined) {
@@ -388,6 +396,14 @@ export default class JellyfinApiSource extends MemoryPositionalSource {
                 ...(play.meta?.url || {}),
                 web: u.toString().replace('%23', '#')
             }
+            if(
+                this.config.data.frontendUrlOverride !== undefined &&
+                this.config.data.frontendUrlOverride.length > 0 &&
+                play.meta.url.web !== undefined &&
+                play.meta.url.web.length > 0
+            ) {
+                play.meta.url.web = play.meta.url.web.replace(this.config.data.url, this.config.data.frontendUrlOverride);
+            }
         }
 
         return play;

src/backend/tests/jellyfin/jellyfin.test.ts

@@ -15,6 +15,8 @@ import {
     // @ts-expect-error weird typings?
     SessionInfo,
 } from "@jellyfin/sdk/lib/generated-client/index.js";
+// @ts-expect-error weird typings?
+import { getImageApi } from "@jellyfin/sdk/lib/utils/api/index.js";
 import { PlayerStateDataMaybePlay } from "../../common/infrastructure/Atomic.js";
 
 const dataAsFixture = (data: any): TestFixture => {
@@ -132,6 +134,44 @@ describe("Jellyfin API Source", function() {
         });
     });
 
+    describe('Parses and replaces frontendUrlOverride correctly if set', function () {
+
+        const item = {
+            AlbumId: 123,
+            AlbumPrimaryImageTag: 'Primary',
+            ParentId: 456,
+            ServerId: 789,
+        };
+        const sourceUrl = 'http://192.168.10.11:8096';
+        const frontendUrlOverride = 'https://myjellyfin.com';
+
+        it('Should use default url if frontendUrlOverride unset', async function () {
+            const jf = createJfApi({...defaultJfApiCreds, url: sourceUrl});
+            await jf.buildInitData();
+            jf.address = sourceUrl;
+            jf.api = jf.client.createApi(jf.address);
+            jf.imageApi = getImageApi(jf.api);
+
+            expect(jf.formatPlayObjAware(item).meta.art.album).to.be.eql(`${sourceUrl}/Items/123/Images/Primary?maxHeight=500`);
+            expect(jf.formatPlayObjAware(item).meta.url.web).to.be.eql(`${sourceUrl}/web/#/details?id=456&serviceId=789`);
+
+            await jf.destroy();
+        });
+
+        it('Should parse and replace frontendUrlOverride correctly', async function () {
+            const jf = createJfApi({...defaultJfApiCreds, frontendUrlOverride: frontendUrlOverride, url: sourceUrl});
+            await jf.buildInitData();
+            jf.address = sourceUrl;
+            jf.api = jf.client.createApi(jf.address);
+            jf.imageApi = getImageApi(jf.api);
+
+            expect(jf.formatPlayObjAware(item).meta.art.album).to.be.eql(`${frontendUrlOverride}/Items/123/Images/Primary?maxHeight=500`);
+            expect(jf.formatPlayObjAware(item).meta.url.web).to.be.eql(`${frontendUrlOverride}/web/#/details?id=456&serviceId=789`);
+
+            await jf.destroy();
+        });
+    });
+
     describe('Correctly detects activity as valid/invalid', function() {
 
         describe('Filters from Configuration', function() {