⚡ Make it possible to set credentials to fixed values

packages/cli/src/CredentialsHelper.ts

@@ -0,0 +1,81 @@
+import {
+	Credentials,
+} from 'n8n-core';
+
+import {
+	ICredentialDataDecryptedObject,
+	ICredentialsHelper,
+} from 'n8n-workflow';
+
+import {
+	CredentialsOverwrites,
+	Db,
+	ICredentialsDb,
+} from './';
+
+
+export class CredentialsHelper extends ICredentialsHelper {
+
+	/**
+	 * Returns the credentials instance
+	 *
+	 * @param {string} name Name of the credentials to return instance of
+	 * @param {string} type Type of the credentials to return instance of
+	 * @returns {Credentials}
+	 * @memberof CredentialsHelper
+	 */
+	getCredentials(name: string, type: string): Credentials {
+		if (!this.workflowCredentials[type]) {
+			throw new Error(`No credentials of type "${type}" exist.`);
+		}
+		if (!this.workflowCredentials[type][name]) {
+			throw new Error(`No credentials with name "${name}" exist for type "${type}".`);
+		}
+		const credentialData = this.workflowCredentials[type][name];
+
+		return new Credentials(credentialData.name, credentialData.type, credentialData.nodesAccess, credentialData.data);
+	}
+
+
+	/**
+	 * Returns the decrypted credential data with applied overwrites
+	 *
+	 * @param {string} name Name of the credentials to return data of
+	 * @param {string} type Type of the credentials to return data of
+	 * @returns {ICredentialDataDecryptedObject}
+	 * @memberof CredentialsHelper
+	 */
+	getDecrypted(name: string, type: string): ICredentialDataDecryptedObject {
+		const credentials = this.getCredentials(name, type);
+
+		// Load and apply the credentials overwrites if any exist
+		const credentialsOverwrites = CredentialsOverwrites();
+		return credentialsOverwrites.applyOverwrite(credentials.type, credentials.getData(this.encryptionKey));
+	}
+
+
+	/**
+	 * Updates credentials in the database
+	 *
+	 * @param {string} name Name of the credentials to set data of
+	 * @param {string} type Type of the credentials to set data of
+	 * @param {ICredentialDataDecryptedObject} data The data to set
+	 * @returns {Promise<void>}
+	 * @memberof CredentialsHelper
+	 */
+	async updateCredentials(name: string, type: string, data: ICredentialDataDecryptedObject): Promise<void> {
+		const credentials = await this.getCredentials(name, type);
+
+		credentials.setData(data, this.encryptionKey);
+		const newCredentialsData = credentials.getDataToSave() as ICredentialsDb;
+
+		// Add special database related data
+		newCredentialsData.updatedAt = new Date();
+
+		// TODO: also add user automatically depending on who is logged in, if anybody is logged in
+
+		// Save the credentials in DB
+		await Db.collections.Credentials!.save(newCredentialsData);
+	}
+
+}