feat: add reminder source (#126)

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

@@ -0,0 +1,48 @@
+import { ReminderSource, ReminderTimeZoneInput } from "@freya/source-reminders"
+import { type } from "arktype"
+
+import type { Database } from "../db/index.ts"
+import type { FeedSourceProvider } from "../session/feed-source-provider.ts"
+
+import { DrizzleReminderStorage } from "./storage.ts"
+
+export interface ReminderSourceProviderOptions {
+	db: Database
+}
+
+export const reminderConfig = type({
+	"+": "reject",
+	"lookAheadMs?": "number.integer >= 0",
+	"lookBackMs?": "number.integer >= 0",
+	"includeCompleted?": "boolean",
+	"defaultTimeZone?": ReminderTimeZoneInput,
+})
+
+export class ReminderSourceProvider implements FeedSourceProvider {
+	readonly sourceId = "freya.reminders"
+	readonly configSchema = reminderConfig
+	private readonly db: Database
+
+	constructor(options: ReminderSourceProviderOptions) {
+		this.db = options.db
+	}
+
+	async feedSourceForUser(
+		userId: string,
+		config: unknown,
+		_credentials: unknown,
+	): Promise<ReminderSource> {
+		const parsed = reminderConfig(config)
+		if (parsed instanceof type.errors) {
+			throw new Error(`Invalid reminders config: ${parsed.summary}`)
+		}
+
+		return new ReminderSource({
+			storage: new DrizzleReminderStorage(this.db, userId),
+			lookAheadMs: parsed.lookAheadMs,
+			lookBackMs: parsed.lookBackMs,
+			includeCompleted: parsed.includeCompleted,
+			defaultTimeZone: parsed.defaultTimeZone,
+		})
+	}
+}