feat: add jellyfin integration (#672)

* feat: #655 implement jellyfin media server

* fix: table overflow

* feat: pr feedback

* refactor: format

* refactor: merge existing code

* fix: code smells

* refactor: format commit

packages/integrations/src/jellyfin/jellyfin-integration.ts

@@ -0,0 +1,68 @@
+import { Jellyfin } from "@jellyfin/sdk";
+import { getSessionApi } from "@jellyfin/sdk/lib/utils/api/session-api";
+import { getSystemApi } from "@jellyfin/sdk/lib/utils/api/system-api";
+
+import { Integration } from "../base/integration";
+import type { StreamSession } from "../interfaces/media-server/session";
+
+export class JellyfinIntegration extends Integration {
+  private readonly jellyfin: Jellyfin = new Jellyfin({
+    clientInfo: {
+      name: "Homarr",
+      version: "0.0.1",
+    },
+    deviceInfo: {
+      name: "Homarr",
+      id: "homarr",
+    },
+  });
+
+  public async testConnectionAsync(): Promise<void> {
+    const api = this.getApi();
+    const systemApi = getSystemApi(api);
+    await systemApi.getPingSystem();
+  }
+
+  public async getCurrentSessionsAsync(): Promise<StreamSession[]> {
+    const api = this.getApi();
+    const sessionApi = getSessionApi(api);
+    const sessions = await sessionApi.getSessions();
+
+    if (sessions.status !== 200) {
+      throw new Error(
+        `Jellyfin server ${this.integration.url} returned a non successful status code: ${sessions.status}`,
+      );
+    }
+
+    return sessions.data.map((sessionInfo): StreamSession => {
+      let nowPlaying: StreamSession["currentlyPlaying"] | null = null;
+
+      if (sessionInfo.NowPlayingItem) {
+        nowPlaying = {
+          type: "tv",
+          name: sessionInfo.NowPlayingItem.Name ?? "",
+          seasonName: sessionInfo.NowPlayingItem.SeasonName ?? "",
+          episodeName: sessionInfo.NowPlayingItem.EpisodeTitle,
+          albumName: sessionInfo.NowPlayingItem.Album ?? "",
+          episodeCount: sessionInfo.NowPlayingItem.EpisodeCount,
+        };
+      }
+
+      return {
+        sessionId: `${sessionInfo.Id}`,
+        sessionName: `${sessionInfo.Client} (${sessionInfo.DeviceName})`,
+        user: {
+          profilePictureUrl: `${this.integration.url}/Users/${sessionInfo.UserId}/Images/Primary`,
+          userId: sessionInfo.UserId ?? "",
+          username: sessionInfo.UserName ?? "",
+        },
+        currentlyPlaying: nowPlaying,
+      };
+    });
+  }
+
+  private getApi() {
+    const apiKey = this.getSecretValue("apiKey");
+    return this.jellyfin.createApi(this.integration.url, apiKey);
+  }
+}