refactor(core): Migrate binary-data config to a decorated config class (#14616)

packages/core/src/binary-data/binary-data.config.ts

@@ -1,8 +1,42 @@
 import { Config, Env } from '@n8n/config';
+import { createHash } from 'node:crypto';
+import path from 'node:path';
+import { z } from 'zod';
+
+import { InstanceSettings } from '@/instance-settings';
+
+const binaryDataModesSchema = z.enum(['default', 'filesystem', 's3']);
+
+const availableModesSchema = z
+	.string()
+	.transform((value) => value.split(','))
+	.pipe(binaryDataModesSchema.array());
 
 @Config
 export class BinaryDataConfig {
-	/** Secret for creating publicly-accesible signed URLs for binary data */
+	/** Available modes of binary data storage, as comma separated strings. */
+	@Env('N8N_AVAILABLE_BINARY_DATA_MODES', availableModesSchema)
+	availableModes: z.infer<typeof availableModesSchema> = ['filesystem'];
+
+	/** Storage mode for binary data. */
+	@Env('N8N_DEFAULT_BINARY_DATA_MODE', binaryDataModesSchema)
+	mode: z.infer<typeof binaryDataModesSchema> = 'default';
+
+	/** Path for binary data storage in "filesystem" mode. */
+	@Env('N8N_BINARY_DATA_STORAGE_PATH')
+	localStoragePath: string;
+
+	/**
+	 * Secret for creating publicly-accesible signed URLs for binary data.
+	 * When not passed in, this will be derived from the instances's encryption-key
+	 **/
 	@Env('N8N_BINARY_DATA_SIGNING_SECRET')
-	signingSecret?: string = undefined;
+	signingSecret: string;
+
+	constructor({ encryptionKey, n8nFolder }: InstanceSettings) {
+		this.localStoragePath = path.join(n8nFolder, 'binaryData');
+		this.signingSecret = createHash('sha256')
+			.update(`url-signing:${encryptionKey}`)
+			.digest('base64');
+	}
 }