feat(session): query enabled sources before providers (#85)

UserSessionManager now queries the user_sources table for enabled
sources before calling any provider. Providers receive the per-user
JSON config directly instead of querying the DB themselves, removing
their db dependency and eliminating redundant round-trips.

Co-authored-by: Ona <no-reply@ona.com>

apps/aelis-backend/src/admin/http.test.ts

@@ -1,7 +1,7 @@
 import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aelis/core"
 
+import { describe, expect, mock, test } from "bun:test"
 import { Hono } from "hono"
-import { describe, expect, test } from "bun:test"
 
 import type { AdminMiddleware } from "../auth/admin-middleware.ts"
 import type { AuthSession, AuthUser } from "../auth/session.ts"
@@ -11,6 +11,39 @@ import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
 import { UserSessionManager } from "../session/user-session-manager.ts"
 import { registerAdminHttpHandlers } from "./http.ts"
 
+let mockEnabledSourceIds: string[] = []
+
+mock.module("../sources/user-sources.ts", () => ({
+	sources: (_db: Database, _userId: string) => ({
+		async enabled() {
+			const now = new Date()
+			return mockEnabledSourceIds.map((sourceId) => ({
+				id: crypto.randomUUID(),
+				userId: _userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}))
+		},
+		async find(sourceId: string) {
+			const now = new Date()
+			return {
+				id: crypto.randomUUID(),
+				userId: _userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}
+		},
+	}),
+}))
+
 function createStubSource(id: string): FeedSource {
 	return {
 		id,
@@ -63,7 +96,8 @@ function passthroughAdminMiddleware(): AdminMiddleware {
 const fakeDb = {} as Database
 
 function createApp(providers: FeedSourceProvider[]) {
-	const sessionManager = new UserSessionManager({ providers })
+	mockEnabledSourceIds = providers.map((p) => p.sourceId)
+	const sessionManager = new UserSessionManager({ db: fakeDb, providers })
 	const app = new Hono()
 	registerAdminHttpHandlers(app, {
 		sessionManager,
@@ -158,5 +192,4 @@ describe("PUT /api/admin/:sourceId/config", () => {
 		expect(provider!.sourceId).toBe("aelis.weather")
 		expect(provider).not.toBe(originalProvider)
 	})
-
 })

apps/aelis-backend/src/admin/http.ts

@@ -51,7 +51,6 @@ async function handleUpdateProviderConfig(c: Context<Env>) {
 	}
 
 	const sessionManager = c.get("sessionManager")
-	const db = c.get("db")
 
 	let body: unknown
 	try {
@@ -68,7 +67,6 @@ async function handleUpdateProviderConfig(c: Context<Env>) {
 			}
 
 			const updated = new WeatherSourceProvider({
-				db,
 				credentials: parsed.credentials,
 			})
 

apps/aelis-backend/src/engine/http.test.ts

@@ -1,9 +1,11 @@
 import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aelis/core"
 
 import { contextKey } from "@aelis/core"
-import { describe, expect, spyOn, test } from "bun:test"
+import { describe, expect, mock, spyOn, test } from "bun:test"
 import { Hono } from "hono"
 
+import type { Database } from "../db/index.ts"
+
 import { mockAuthSessionMiddleware } from "../auth/session-middleware.ts"
 import { UserSessionManager } from "../session/index.ts"
 import { registerFeedHttpHandlers } from "./http.ts"
@@ -50,9 +52,45 @@ function buildTestApp(sessionManager: UserSessionManager, userId?: string) {
 	return app
 }
 
+let mockEnabledSourceIds: string[] = []
+
+mock.module("../sources/user-sources.ts", () => ({
+	sources: (_db: Database, _userId: string) => ({
+		async enabled() {
+			const now = new Date()
+			return mockEnabledSourceIds.map((sourceId) => ({
+				id: crypto.randomUUID(),
+				userId: _userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}))
+		},
+		async find(sourceId: string) {
+			const now = new Date()
+			return {
+				id: crypto.randomUUID(),
+				userId: _userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}
+		},
+	}),
+}))
+
+const fakeDb = {} as Database
+
 describe("GET /api/feed", () => {
 	test("returns 401 without auth", async () => {
-		const manager = new UserSessionManager({ providers: [] })
+		mockEnabledSourceIds = []
+		const manager = new UserSessionManager({ db: fakeDb, providers: [] })
 		const app = buildTestApp(manager)
 
 		const res = await app.request("/api/feed")
@@ -71,7 +109,9 @@ describe("GET /api/feed", () => {
 				data: { value: 42 },
 			},
 		]
+		mockEnabledSourceIds = ["test"]
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "test",
@@ -111,7 +151,9 @@ describe("GET /api/feed", () => {
 				data: { fresh: true },
 			},
 		]
+		mockEnabledSourceIds = ["test"]
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "test",
@@ -150,7 +192,9 @@ describe("GET /api/feed", () => {
 				throw new Error("connection timeout")
 			},
 		}
+		mockEnabledSourceIds = ["failing"]
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "failing",
@@ -173,7 +217,9 @@ describe("GET /api/feed", () => {
 	})
 
 	test("returns 503 when all providers fail", async () => {
+		mockEnabledSourceIds = ["test"]
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "test",
@@ -206,7 +252,9 @@ describe("GET /api/context", () => {
 	const mockUserId = "k7Gx2mPqRvNwYs9TdLfA4bHcJeUo1iZn"
 
 	async function buildContextApp(userId?: string) {
+		mockEnabledSourceIds = ["weather"]
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "weather",
@@ -222,7 +270,8 @@ describe("GET /api/context", () => {
 	}
 
 	test("returns 401 without auth", async () => {
-		const manager = new UserSessionManager({ providers: [] })
+		mockEnabledSourceIds = []
+		const manager = new UserSessionManager({ db: fakeDb, providers: [] })
 		const app = buildTestApp(manager)
 
 		const res = await app.request('/api/context?key=["aelis.weather","weather"]')

apps/aelis-backend/src/location/provider.ts

@@ -1,26 +1,11 @@
 import { LocationSource } from "@aelis/source-location"
 
-import type { Database } from "../db/index.ts"
 import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
 
-import { SourceDisabledError } from "../sources/errors.ts"
-import { sources } from "../sources/user-sources.ts"
-
 export class LocationSourceProvider implements FeedSourceProvider {
 	readonly sourceId = "aelis.location"
-	private readonly db: Database
-
-	constructor(db: Database) {
-		this.db = db
-	}
-
-	async feedSourceForUser(userId: string): Promise<LocationSource> {
-		const row = await sources(this.db, userId).find("aelis.location")
-
-		if (!row || !row.enabled) {
-			throw new SourceDisabledError("aelis.location", userId)
-		}
 
+	async feedSourceForUser(_userId: string, _config: unknown): Promise<LocationSource> {
 		return new LocationSource()
 	}
 }

apps/aelis-backend/src/server.ts

@@ -32,10 +32,10 @@ function main() {
 	}
 
 	const sessionManager = new UserSessionManager({
+		db,
 		providers: [
-			new LocationSourceProvider(db),
+			new LocationSourceProvider(),
 			new WeatherSourceProvider({
-				db,
 				credentials: {
 					privateKey: process.env.WEATHERKIT_PRIVATE_KEY!,
 					keyId: process.env.WEATHERKIT_KEY_ID!,

apps/aelis-backend/src/session/feed-source-provider.ts

@@ -3,5 +3,5 @@ import type { FeedSource } from "@aelis/core"
 export interface FeedSourceProvider {
 	/** The source ID this provider is responsible for (e.g., "aelis.location"). */
 	readonly sourceId: string
-	feedSourceForUser(userId: string): Promise<FeedSource>
+	feedSourceForUser(userId: string, config: unknown): Promise<FeedSource>
 }

apps/aelis-backend/src/session/user-session-manager.test.ts

@@ -2,12 +2,77 @@ import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aeli
 
 import { LocationSource } from "@aelis/source-location"
 import { WeatherSource } from "@aelis/source-weatherkit"
-import { describe, expect, mock, spyOn, test } from "bun:test"
+import { beforeEach, describe, expect, mock, spyOn, test } from "bun:test"
 
+import type { Database } from "../db/index.ts"
 import type { FeedSourceProvider } from "./feed-source-provider.ts"
 
 import { UserSessionManager } from "./user-session-manager.ts"
 
+/**
+ * Per-user enabled source IDs used by the mocked `sources` module.
+ * Tests configure this before calling getOrCreate.
+ * Key = userId (or "*" for a default), value = array of enabled sourceIds.
+ */
+const enabledByUser = new Map<string, string[]>()
+
+/** Set which sourceIds are enabled for all users. */
+function setEnabledSources(sourceIds: string[]) {
+	enabledByUser.clear()
+	enabledByUser.set("*", sourceIds)
+}
+
+/** Set which sourceIds are enabled for a specific user. */
+function setEnabledSourcesForUser(userId: string, sourceIds: string[]) {
+	enabledByUser.set(userId, sourceIds)
+}
+
+function getEnabledSourceIds(userId: string): string[] {
+	return enabledByUser.get(userId) ?? enabledByUser.get("*") ?? []
+}
+
+/**
+ * Controls what `find()` returns in the mock. When `undefined` (the default),
+ * `find()` returns a standard enabled row. Set to a specific value (including
+ * `null`) to override the return value for all `find()` calls.
+ */
+let mockFindResult: unknown | undefined
+
+// Mock the sources module so UserSessionManager's DB query returns controlled data.
+mock.module("../sources/user-sources.ts", () => ({
+	sources: (_db: Database, userId: string) => ({
+		async enabled() {
+			const now = new Date()
+			return getEnabledSourceIds(userId).map((sourceId) => ({
+				id: crypto.randomUUID(),
+				userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}))
+		},
+		async find(sourceId: string) {
+			if (mockFindResult !== undefined) return mockFindResult
+			const now = new Date()
+			return {
+				id: crypto.randomUUID(),
+				userId,
+				sourceId,
+				enabled: true,
+				config: {},
+				credentials: null,
+				createdAt: now,
+				updatedAt: now,
+			}
+		},
+	}),
+}))
+
+const fakeDb = {} as Database
+
 function createStubSource(id: string, items: FeedItem[] = []): FeedSource {
 	return {
 		id,
@@ -28,7 +93,8 @@ function createStubSource(id: string, items: FeedItem[] = []): FeedSource {
 
 function createStubProvider(
 	sourceId: string,
-	factory: (userId: string) => Promise<FeedSource> = async () => createStubSource(sourceId),
+	factory: (userId: string, config: Record<string, unknown>) => Promise<FeedSource> = async () =>
+		createStubSource(sourceId),
 ): FeedSourceProvider {
 	return { sourceId, feedSourceForUser: factory }
 }
@@ -47,9 +113,15 @@ const weatherProvider: FeedSourceProvider = {
 	},
 }
 
+beforeEach(() => {
+	enabledByUser.clear()
+	mockFindResult = undefined
+})
+
 describe("UserSessionManager", () => {
 	test("getOrCreate creates session on first call", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session = await manager.getOrCreate("user-1")
 
@@ -58,7 +130,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("getOrCreate returns same session for same user", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session1 = await manager.getOrCreate("user-1")
 		const session2 = await manager.getOrCreate("user-1")
@@ -67,7 +140,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("getOrCreate returns different sessions for different users", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session1 = await manager.getOrCreate("user-1")
 		const session2 = await manager.getOrCreate("user-2")
@@ -76,7 +150,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("each user gets independent source instances", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session1 = await manager.getOrCreate("user-1")
 		const session2 = await manager.getOrCreate("user-2")
@@ -88,7 +163,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove destroys session and allows re-creation", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session1 = await manager.getOrCreate("user-1")
 		manager.remove("user-1")
@@ -98,13 +174,16 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove is no-op for unknown user", () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		expect(() => manager.remove("unknown")).not.toThrow()
 	})
 
 	test("registers multiple providers", async () => {
+		setEnabledSources(["aelis.location", "aelis.weather"])
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [locationProvider, weatherProvider],
 		})
 
@@ -115,7 +194,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("refresh returns feed result through session", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session = await manager.getOrCreate("user-1")
 		const result = await session.engine.refresh()
@@ -127,7 +207,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("location update via executeAction works", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const session = await manager.getOrCreate("user-1")
 		await session.engine.executeAction("aelis.location", "update-location", {
@@ -142,7 +223,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("subscribe receives updates after location push", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 		const callback = mock()
 
 		const session = await manager.getOrCreate("user-1")
@@ -162,7 +244,8 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove stops reactive updates", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 		const callback = mock()
 
 		const session = await manager.getOrCreate("user-1")
@@ -185,6 +268,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("creates session with successful providers when some fail", async () => {
+		setEnabledSources(["aelis.location", "aelis.failing"])
 		const failingProvider: FeedSourceProvider = {
 			sourceId: "aelis.failing",
 			async feedSourceForUser() {
@@ -193,6 +277,7 @@ describe("UserSessionManager", () => {
 		}
 
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [locationProvider, failingProvider],
 		})
 
@@ -208,7 +293,9 @@ describe("UserSessionManager", () => {
 	})
 
 	test("throws AggregateError when all providers fail", async () => {
+		setEnabledSources(["aelis.fail-1", "aelis.fail-2"])
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "aelis.fail-1",
@@ -229,8 +316,10 @@ describe("UserSessionManager", () => {
 	})
 
 	test("concurrent getOrCreate for same user returns same session", async () => {
+		setEnabledSources(["aelis.location"])
 		let callCount = 0
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "aelis.location",
@@ -253,12 +342,14 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove during in-flight getOrCreate prevents session from being stored", async () => {
+		setEnabledSources(["aelis.location"])
 		let resolveProvider: () => void
 		const providerGate = new Promise<void>((r) => {
 			resolveProvider = r
 		})
 
 		const manager = new UserSessionManager({
+			db: fakeDb,
 			providers: [
 				{
 					sourceId: "aelis.location",
@@ -285,10 +376,67 @@ describe("UserSessionManager", () => {
 		expect(freshSession).toBeDefined()
 		expect(freshSession.engine).toBeDefined()
 	})
+
+	test("only invokes providers for sources enabled for the user", async () => {
+		setEnabledSources(["aelis.location"])
+		const locationFactory = mock(async () => createStubSource("aelis.location"))
+		const weatherFactory = mock(async () => createStubSource("aelis.weather"))
+
+		const manager = new UserSessionManager({
+			db: fakeDb,
+			providers: [
+				{ sourceId: "aelis.location", feedSourceForUser: locationFactory },
+				{ sourceId: "aelis.weather", feedSourceForUser: weatherFactory },
+			],
+		})
+
+		const session = await manager.getOrCreate("user-1")
+
+		expect(locationFactory).toHaveBeenCalledTimes(1)
+		expect(weatherFactory).not.toHaveBeenCalled()
+		expect(session.getSource("aelis.location")).toBeDefined()
+		expect(session.getSource("aelis.weather")).toBeUndefined()
+	})
+
+	test("creates empty session when no sources are enabled", async () => {
+		setEnabledSources([])
+		const factory = mock(async () => createStubSource("aelis.location"))
+
+		const manager = new UserSessionManager({
+			db: fakeDb,
+			providers: [{ sourceId: "aelis.location", feedSourceForUser: factory }],
+		})
+
+		const session = await manager.getOrCreate("user-1")
+
+		expect(factory).not.toHaveBeenCalled()
+		expect(session).toBeDefined()
+		expect(session.getSource("aelis.location")).toBeUndefined()
+	})
+
+	test("per-user enabled sources are respected", async () => {
+		enabledByUser.clear()
+		setEnabledSourcesForUser("user-1", ["aelis.location"])
+		setEnabledSourcesForUser("user-2", ["aelis.weather"])
+
+		const manager = new UserSessionManager({
+			db: fakeDb,
+			providers: [createStubProvider("aelis.location"), createStubProvider("aelis.weather")],
+		})
+
+		const session1 = await manager.getOrCreate("user-1")
+		const session2 = await manager.getOrCreate("user-2")
+
+		expect(session1.getSource("aelis.location")).toBeDefined()
+		expect(session1.getSource("aelis.weather")).toBeUndefined()
+		expect(session2.getSource("aelis.location")).toBeUndefined()
+		expect(session2.getSource("aelis.weather")).toBeDefined()
+	})
 })
 
 describe("UserSessionManager.replaceProvider", () => {
 	test("replaces source in all active sessions", async () => {
+		setEnabledSources(["test"])
 		const itemsV1: FeedItem[] = [
 			{
 				id: "v1",
@@ -309,7 +457,7 @@ describe("UserSessionManager.replaceProvider", () => {
 		]
 
 		const providerV1 = createStubProvider("test", async () => createStubSource("test", itemsV1))
-		const manager = new UserSessionManager({ providers: [providerV1] })
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerV1] })
 
 		const session1 = await manager.getOrCreate("user-1")
 		const session2 = await manager.getOrCreate("user-2")
@@ -330,7 +478,8 @@ describe("UserSessionManager.replaceProvider", () => {
 	})
 
 	test("throws for unknown provider sourceId", async () => {
-		const manager = new UserSessionManager({ providers: [locationProvider] })
+		setEnabledSources(["aelis.location"])
+		const manager = new UserSessionManager({ db: fakeDb, providers: [locationProvider] })
 
 		const unknownProvider = createStubProvider("aelis.unknown")
 
@@ -340,8 +489,9 @@ describe("UserSessionManager.replaceProvider", () => {
 	})
 
 	test("keeps existing source when new provider fails for a user", async () => {
+		setEnabledSources(["test"])
 		const providerV1 = createStubProvider("test", async () => createStubSource("test"))
-		const manager = new UserSessionManager({ providers: [providerV1] })
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerV1] })
 
 		const session = await manager.getOrCreate("user-1")
 		expect(session.getSource("test")).toBeDefined()
@@ -360,6 +510,7 @@ describe("UserSessionManager.replaceProvider", () => {
 	})
 
 	test("new sessions use the replaced provider", async () => {
+		setEnabledSources(["test"])
 		const itemsV1: FeedItem[] = [
 			{
 				id: "v1",
@@ -380,7 +531,7 @@ describe("UserSessionManager.replaceProvider", () => {
 		]
 
 		const providerV1 = createStubProvider("test", async () => createStubSource("test", itemsV1))
-		const manager = new UserSessionManager({ providers: [providerV1] })
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerV1] })
 
 		const providerV2 = createStubProvider("test", async () => createStubSource("test", itemsV2))
 		await manager.replaceProvider(providerV2)
@@ -392,6 +543,7 @@ describe("UserSessionManager.replaceProvider", () => {
 	})
 
 	test("does not affect other providers' sources", async () => {
+		setEnabledSources(["source-a", "source-b"])
 		const providerA = createStubProvider("source-a", async () =>
 			createStubSource("source-a", [
 				{
@@ -415,7 +567,7 @@ describe("UserSessionManager.replaceProvider", () => {
 			]),
 		)
 
-		const manager = new UserSessionManager({ providers: [providerA, providerB] })
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerA, providerB] })
 		const session = await manager.getOrCreate("user-1")
 
 		// Replace only source-a
@@ -440,6 +592,7 @@ describe("UserSessionManager.replaceProvider", () => {
 	})
 
 	test("updates sessions that are still being created", async () => {
+		setEnabledSources(["test"])
 		const itemsV1: FeedItem[] = [
 			{
 				id: "v1",
@@ -468,7 +621,7 @@ describe("UserSessionManager.replaceProvider", () => {
 			await creationGate
 			return createStubSource("test", itemsV1)
 		})
-		const manager = new UserSessionManager({ providers: [providerV1] })
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerV1] })
 
 		// Start session creation but don't let it finish yet
 		const sessionPromise = manager.getOrCreate("user-1")
@@ -487,4 +640,44 @@ describe("UserSessionManager.replaceProvider", () => {
 		const feed = await session.feed()
 		expect(feed.items[0]!.data.version).toBe(2)
 	})
+
+	test("skips source replacement when source was disabled between creation and replace", async () => {
+		setEnabledSources(["test"])
+		const itemsV1: FeedItem[] = [
+			{
+				id: "v1",
+				sourceId: "test",
+				type: "test",
+				timestamp: new Date(),
+				data: { version: 1 },
+			},
+		]
+
+		const providerV1 = createStubProvider("test", async () => createStubSource("test", itemsV1))
+		const manager = new UserSessionManager({ db: fakeDb, providers: [providerV1] })
+
+		const session = await manager.getOrCreate("user-1")
+		const feedBefore = await session.feed()
+		expect(feedBefore.items[0]!.data.version).toBe(1)
+
+		// Simulate the source being disabled/deleted between session creation and replace
+		mockFindResult = null
+
+		const providerV2 = createStubProvider("test", async () =>
+			createStubSource("test", [
+				{
+					id: "v2",
+					sourceId: "test",
+					type: "test",
+					timestamp: new Date(),
+					data: { version: 2 },
+				},
+			]),
+		)
+		await manager.replaceProvider(providerV2)
+
+		// Session should still have v1 — the replace was skipped
+		const feedAfter = await session.feed()
+		expect(feedAfter.items[0]!.data.version).toBe(1)
+	})
 })

apps/aelis-backend/src/session/user-session-manager.ts

@@ -1,11 +1,14 @@
 import type { FeedSource } from "@aelis/core"
 
+import type { Database } from "../db/index.ts"
 import type { FeedEnhancer } from "../enhancement/enhance-feed.ts"
 import type { FeedSourceProvider } from "./feed-source-provider.ts"
 
+import { sources } from "../sources/user-sources.ts"
 import { UserSession } from "./user-session.ts"
 
 export interface UserSessionManagerConfig {
+	db: Database
 	providers: FeedSourceProvider[]
 	feedEnhancer?: FeedEnhancer | null
 }
@@ -13,10 +16,12 @@ export interface UserSessionManagerConfig {
 export class UserSessionManager {
 	private sessions = new Map<string, UserSession>()
 	private pending = new Map<string, Promise<UserSession>>()
+	private readonly db: Database
 	private readonly providers = new Map<string, FeedSourceProvider>()
 	private readonly feedEnhancer: FeedEnhancer | null
 
 	constructor(config: UserSessionManagerConfig) {
+		this.db = config.db
 		for (const provider of config.providers) {
 			this.providers.set(provider.sourceId, provider)
 		}
@@ -64,8 +69,9 @@ export class UserSessionManager {
 	/**
 	 * Replaces a provider and updates all active sessions.
 	 * The new provider must have the same sourceId as an existing one.
-	 * For each active session, re-resolves the source via session.refreshSource.
-	 * If the provider fails for a user, the existing source is kept.
+	 * For each active session, queries the user's source config from the DB
+	 * and re-resolves the source. If the provider fails for a user, the
+	 * existing source is kept.
 	 */
 	async replaceProvider(provider: FeedSourceProvider): Promise<void> {
 		if (!this.providers.has(provider.sourceId)) {
@@ -79,7 +85,7 @@ export class UserSessionManager {
 		const updates: Promise<void>[] = []
 
 		for (const [, session] of this.sessions) {
-			updates.push(session.refreshSource(provider))
+			updates.push(this.refreshSessionSource(session, provider))
 		}
 
 		// Also update sessions that are currently being created so they
@@ -87,7 +93,7 @@ export class UserSessionManager {
 		for (const [, pendingPromise] of this.pending) {
 			updates.push(
 				pendingPromise
-					.then((session) => session.refreshSource(provider))
+					.then((session) => this.refreshSessionSource(session, provider))
 					.catch(() => {
 						// Session creation itself failed — nothing to update.
 					}),
@@ -97,23 +103,60 @@ export class UserSessionManager {
 		await Promise.all(updates)
 	}
 
-	private async createSession(userId: string): Promise<UserSession> {
-		const results = await Promise.allSettled(
-			Array.from(this.providers.values()).map((p) => p.feedSourceForUser(userId)),
-		)
+	/**
+	 * Re-resolves a single source for a session by querying the user's config
+	 * from the DB and calling the provider. If the provider fails, the existing
+	 * source is kept.
+	 */
+	private async refreshSessionSource(
+		session: UserSession,
+		provider: FeedSourceProvider,
+	): Promise<void> {
+		if (!session.hasSource(provider.sourceId)) return
 
-		const sources: FeedSource[] = []
+		try {
+			const row = await sources(this.db, session.userId).find(provider.sourceId)
+			if (!row?.enabled) return
+
+			const newSource = await provider.feedSourceForUser(session.userId, row.config ?? {})
+			session.replaceSource(provider.sourceId, newSource)
+		} catch (err) {
+			console.error(
+				`[UserSessionManager] refreshSource("${provider.sourceId}") failed for user ${session.userId}:`,
+				err,
+			)
+		}
+	}
+
+	private async createSession(userId: string): Promise<UserSession> {
+		const enabledRows = await sources(this.db, userId).enabled()
+
+		const promises: Promise<FeedSource>[] = []
+		for (const row of enabledRows) {
+			const provider = this.providers.get(row.sourceId)
+			if (provider) {
+				promises.push(provider.feedSourceForUser(userId, row.config ?? {}))
+			}
+		}
+
+		if (promises.length === 0) {
+			return new UserSession(userId, [], this.feedEnhancer)
+		}
+
+		const results = await Promise.allSettled(promises)
+
+		const feedSources: FeedSource[] = []
 		const errors: unknown[] = []
 
 		for (const result of results) {
 			if (result.status === "fulfilled") {
-				sources.push(result.value)
+				feedSources.push(result.value)
 			} else {
 				errors.push(result.reason)
 			}
 		}
 
-		if (sources.length === 0 && errors.length > 0) {
+		if (feedSources.length === 0 && errors.length > 0) {
 			throw new AggregateError(errors, "All feed source providers failed")
 		}
 
@@ -121,6 +164,6 @@ export class UserSessionManager {
 			console.error("[UserSessionManager] Feed source provider failed:", error)
 		}
 
-		return new UserSession(userId, sources, this.feedEnhancer)
+		return new UserSession(userId, feedSources, this.feedEnhancer)
 	}
 }

apps/aelis-backend/src/session/user-session.test.ts

@@ -3,8 +3,6 @@ import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aeli
 import { LocationSource } from "@aelis/source-location"
 import { describe, expect, spyOn, test } from "bun:test"
 
-import type { FeedSourceProvider } from "./feed-source-provider.ts"
-
 import { UserSession } from "./user-session.ts"
 
 function createStubSource(id: string, items: FeedItem[] = []): FeedSource {
@@ -394,73 +392,3 @@ describe("UserSession.removeSource", () => {
 		expect(session.getSource("test")).toBeDefined()
 	})
 })
-
-describe("UserSession.refreshSource", () => {
-	test("replaces existing source via provider", async () => {
-		const itemsV1: FeedItem[] = [
-			{
-				id: "v1",
-				sourceId: "test",
-				type: "test",
-				timestamp: new Date(),
-				data: { version: 1 },
-			},
-		]
-		const itemsV2: FeedItem[] = [
-			{
-				id: "v2",
-				sourceId: "test",
-				type: "test",
-				timestamp: new Date(),
-				data: { version: 2 },
-			},
-		]
-
-		const session = new UserSession("test-user", [createStubSource("test", itemsV1)])
-
-		const provider: FeedSourceProvider = {
-			sourceId: "test",
-			async feedSourceForUser() {
-				return createStubSource("test", itemsV2)
-			},
-		}
-
-		await session.refreshSource(provider)
-
-		const result = await session.feed()
-		expect(result.items[0]!.data.version).toBe(2)
-	})
-
-	test("throws when source is not registered", async () => {
-		const session = new UserSession("test-user", [createStubSource("existing")])
-
-		const provider: FeedSourceProvider = {
-			sourceId: "new-source",
-			async feedSourceForUser() {
-				return createStubSource("new-source")
-			},
-		}
-
-		await expect(session.refreshSource(provider)).rejects.toThrow()
-	})
-
-	test("keeps existing source when provider fails", async () => {
-		const session = new UserSession("test-user", [createStubSource("test")])
-
-		const spy = spyOn(console, "error").mockImplementation(() => {})
-
-		const provider: FeedSourceProvider = {
-			sourceId: "test",
-			async feedSourceForUser() {
-				throw new Error("source disabled")
-			},
-		}
-
-		await session.refreshSource(provider)
-
-		expect(session.getSource("test")).toBeDefined()
-		expect(spy).toHaveBeenCalled()
-
-		spy.mockRestore()
-	})
-})

apps/aelis-backend/src/session/user-session.ts

@@ -1,7 +1,6 @@
 import { FeedEngine, type FeedItem, type FeedResult, type FeedSource } from "@aelis/core"
 
 import type { FeedEnhancer } from "../enhancement/enhance-feed.ts"
-import type { FeedSourceProvider } from "./feed-source-provider.ts"
 
 export class UserSession {
 	readonly userId: string
@@ -70,25 +69,8 @@ export class UserSession {
 		return this.sources.get(sourceId) as T | undefined
 	}
 
-	/**
-	 * Re-resolves a source from its provider using this session's userId.
-	 * The source must already be registered. Throws if it isn't.
-	 * If the provider fails, the existing source is kept.
-	 */
-	async refreshSource(provider: FeedSourceProvider): Promise<void> {
-		if (!this.sources.has(provider.sourceId)) {
-			throw new Error(`Cannot refresh source "${provider.sourceId}": not registered`)
-		}
-
-		try {
-			const newSource = await provider.feedSourceForUser(this.userId)
-			this.replaceSource(provider.sourceId, newSource)
-		} catch (err) {
-			console.error(
-				`[UserSession] refreshSource("${provider.sourceId}") failed for user ${this.userId}:`,
-				err,
-			)
-		}
+	hasSource(sourceId: string): boolean {
+		return this.sources.has(sourceId)
 	}
 
 	/**

apps/aelis-backend/src/sources/errors.ts

@@ -1,21 +1,3 @@
-/**
- * Thrown by a FeedSourceProvider when the source is not enabled for a user.
- *
- * UserSessionManager's Promise.allSettled handles this gracefully —
- * the source is excluded from the session without crashing.
- */
-export class SourceDisabledError extends Error {
-	readonly sourceId: string
-	readonly userId: string
-
-	constructor(sourceId: string, userId: string) {
-		super(`Source "${sourceId}" is not enabled for user "${userId}"`)
-		this.name = "SourceDisabledError"
-		this.sourceId = sourceId
-		this.userId = userId
-	}
-}
-
 /**
  * Thrown when an operation targets a user source that doesn't exist.
  */

apps/aelis-backend/src/tfl/provider.ts

@@ -1,15 +1,11 @@
 import { TflSource, type ITflApi, type TflLineId } from "@aelis/source-tfl"
 import { type } from "arktype"
 
-import type { Database } from "../db/index.ts"
 import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
 
-import { SourceDisabledError } from "../sources/errors.ts"
-import { sources } from "../sources/user-sources.ts"
-
 export type TflSourceProviderOptions =
-	| { db: Database; apiKey: string; client?: never }
-	| { db: Database; apiKey?: never; client: ITflApi }
+	| { apiKey: string; client?: never }
+	| { apiKey?: never; client: ITflApi }
 
 const tflConfig = type({
 	"lines?": "string[]",
@@ -17,26 +13,18 @@ const tflConfig = type({
 
 export class TflSourceProvider implements FeedSourceProvider {
 	readonly sourceId = "aelis.tfl"
-	private readonly db: Database
 	private readonly apiKey: string | undefined
 	private readonly client: ITflApi | undefined
 
 	constructor(options: TflSourceProviderOptions) {
-		this.db = options.db
 		this.apiKey = "apiKey" in options ? options.apiKey : undefined
 		this.client = "client" in options ? options.client : undefined
 	}
 
-	async feedSourceForUser(userId: string): Promise<TflSource> {
-		const row = await sources(this.db, userId).find("aelis.tfl")
-
-		if (!row || !row.enabled) {
-			throw new SourceDisabledError("aelis.tfl", userId)
-		}
-
-		const parsed = tflConfig(row.config ?? {})
+	async feedSourceForUser(_userId: string, config: unknown): Promise<TflSource> {
+		const parsed = tflConfig(config)
 		if (parsed instanceof type.errors) {
-			throw new Error(`Invalid TFL config for user ${userId}: ${parsed.summary}`)
+			throw new Error(`Invalid TFL config: ${parsed.summary}`)
 		}
 
 		return new TflSource({

apps/aelis-backend/src/weather/provider.ts

@@ -1,14 +1,9 @@
 import { WeatherSource, type WeatherSourceOptions } from "@aelis/source-weatherkit"
 import { type } from "arktype"
 
-import type { Database } from "../db/index.ts"
 import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
 
-import { SourceDisabledError } from "../sources/errors.ts"
-import { sources } from "../sources/user-sources.ts"
-
 export interface WeatherSourceProviderOptions {
-	db: Database
 	credentials: WeatherSourceOptions["credentials"]
 	client?: WeatherSourceOptions["client"]
 }
@@ -21,26 +16,18 @@ const weatherConfig = type({
 
 export class WeatherSourceProvider implements FeedSourceProvider {
 	readonly sourceId = "aelis.weather"
-	private readonly db: Database
 	private readonly credentials: WeatherSourceOptions["credentials"]
 	private readonly client: WeatherSourceOptions["client"]
 
 	constructor(options: WeatherSourceProviderOptions) {
-		this.db = options.db
 		this.credentials = options.credentials
 		this.client = options.client
 	}
 
-	async feedSourceForUser(userId: string): Promise<WeatherSource> {
-		const row = await sources(this.db, userId).find("aelis.weather")
-
-		if (!row || !row.enabled) {
-			throw new SourceDisabledError("aelis.weather", userId)
-		}
-
-		const parsed = weatherConfig(row.config ?? {})
+	async feedSourceForUser(_userId: string, config: unknown): Promise<WeatherSource> {
+		const parsed = weatherConfig(config)
 		if (parsed instanceof type.errors) {
-			throw new Error(`Invalid weather config for user ${userId}: ${parsed.summary}`)
+			throw new Error(`Invalid weather config: ${parsed.summary}`)
 		}
 
 		return new WeatherSource({