chore: rename aelis to freya

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

@@ -0,0 +1,42 @@
+import { TflSource, type ITflApi, type TflLineId } from "@freya/source-tfl"
+import { type } from "arktype"
+
+import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
+
+export type TflSourceProviderOptions =
+	| { apiKey: string; client?: never }
+	| { apiKey?: never; client: ITflApi }
+
+export const tflConfig = type({
+	"+": "reject",
+	"lines?": "string[]",
+})
+
+export class TflSourceProvider implements FeedSourceProvider {
+	readonly sourceId = "freya.tfl"
+	readonly configSchema = tflConfig
+	private readonly apiKey: string | undefined
+	private readonly client: ITflApi | undefined
+
+	constructor(options: TflSourceProviderOptions) {
+		this.apiKey = "apiKey" in options ? options.apiKey : undefined
+		this.client = "client" in options ? options.client : undefined
+	}
+
+	async feedSourceForUser(
+		_userId: string,
+		config: unknown,
+		_credentials: unknown,
+	): Promise<TflSource> {
+		const parsed = tflConfig(config)
+		if (parsed instanceof type.errors) {
+			throw new Error(`Invalid TFL config: ${parsed.summary}`)
+		}
+
+		return new TflSource({
+			apiKey: this.apiKey,
+			client: this.client,
+			lines: parsed.lines as TflLineId[] | undefined,
+		})
+	}
+}