refactor(core): Refactor nodes loading (no-changelog) (#7283)

fixes PAY-605

packages/cli/src/services/frontend.service.ts

@@ -0,0 +1,67 @@
+import { Service } from 'typedi';
+import uniq from 'lodash/uniq';
+import { createWriteStream } from 'fs';
+import { mkdir } from 'fs/promises';
+import path from 'path';
+
+import type { ICredentialType, INodeTypeBaseDescription } from 'n8n-workflow';
+
+import { GENERATED_STATIC_DIR } from '@/constants';
+import { CredentialsOverwrites } from '@/CredentialsOverwrites';
+import { CredentialTypes } from '@/CredentialTypes';
+import { LoadNodesAndCredentials } from '@/LoadNodesAndCredentials';
+
+@Service()
+export class FrontendService {
+	constructor(
+		private readonly loadNodesAndCredentials: LoadNodesAndCredentials,
+		private readonly credentialTypes: CredentialTypes,
+		private readonly credentialsOverwrites: CredentialsOverwrites,
+	) {}
+
+	async generateTypes() {
+		this.overwriteCredentialsProperties();
+
+		// pre-render all the node and credential types as static json files
+		await mkdir(path.join(GENERATED_STATIC_DIR, 'types'), { recursive: true });
+		const { credentials, nodes } = this.loadNodesAndCredentials.types;
+		this.writeStaticJSON('nodes', nodes);
+		this.writeStaticJSON('credentials', credentials);
+	}
+
+	private writeStaticJSON(name: string, data: INodeTypeBaseDescription[] | ICredentialType[]) {
+		const filePath = path.join(GENERATED_STATIC_DIR, `types/${name}.json`);
+		const stream = createWriteStream(filePath, 'utf-8');
+		stream.write('[\n');
+		data.forEach((entry, index) => {
+			stream.write(JSON.stringify(entry));
+			if (index !== data.length - 1) stream.write(',');
+			stream.write('\n');
+		});
+		stream.write(']\n');
+		stream.end();
+	}
+
+	private overwriteCredentialsProperties() {
+		const { credentials } = this.loadNodesAndCredentials.types;
+		const credentialsOverwrites = this.credentialsOverwrites.getAll();
+		for (const credential of credentials) {
+			const overwrittenProperties = [];
+			this.credentialTypes
+				.getParentTypes(credential.name)
+				.reverse()
+				.map((name) => credentialsOverwrites[name])
+				.forEach((overwrite) => {
+					if (overwrite) overwrittenProperties.push(...Object.keys(overwrite));
+				});
+
+			if (credential.name in credentialsOverwrites) {
+				overwrittenProperties.push(...Object.keys(credentialsOverwrites[credential.name]));
+			}
+
+			if (overwrittenProperties.length) {
+				credential.__overwrittenProperties = uniq(overwrittenProperties);
+			}
+		}
+	}
+}