Credentials, functionality

packages/nodes-base/nodes/Dropbox/GenericFunctions.ts

@@ -0,0 +1,71 @@
+import { IExecuteFunctions, IHookFunctions } from 'n8n-core';
+import { OptionsWithUri } from 'request';
+
+/**
+ * Make an API request to Dropbox
+ *
+ * @param {IHookFunctions} this
+ * @param {string} method
+ * @param {string} url
+ * @param {object} body
+ * @returns {Promise<any>}
+ */
+export async function dropboxApiRequest(
+	this: IHookFunctions | IExecuteFunctions,
+	method: string,
+	endpoint: string,
+	body: object,
+	headers?: object,
+	encoding?: string | null
+): Promise<any> {
+	// tslint:disable-line:no-any
+
+	const options: OptionsWithUri = {
+		headers,
+		method,
+		body,
+		uri: endpoint,
+		json: true,
+		encoding
+	};
+
+	if (!Object.keys(body).length) {
+		delete options.body;
+	}
+
+	if (encoding !== null) {
+		delete options.encoding;
+  }
+  
+	const authenticationMethod = this.getNodeParameter(
+		'authentication',
+		0
+	) as string;
+
+	try {
+		if (authenticationMethod === 'accessToken') {
+			return await this.helpers.request(options);
+		} else {
+			return await this.helpers.requestOAuth.call(
+				this,
+				'dropboxOAuth2Api',
+				options
+			);
+		}
+	} catch (error) {
+		if (error.statusCode === 401) {
+			// Return a clear error
+			throw new Error('The Dropbox credentials are not valid!');
+		}
+
+		if (error.error && error.error.error_summary) {
+			// Try to return the error prettier
+			throw new Error(
+				`Dropbox error response [${error.statusCode}]: ${error.error.error_summary}`
+			);
+		}
+
+		// If that data does not exist for some reason return the actual error
+		throw error;
+	}
+}