n8n/packages/nodes-base/credentials/CalendlyApi.credentials.ts

import {
	ICredentialDataDecryptedObject,
	ICredentialTestRequest,
	ICredentialType,
	IHttpRequestOptions,
	INodeProperties,
} from 'n8n-workflow';

export class CalendlyApi implements ICredentialType {
	name = 'calendlyApi';
	displayName = 'Calendly API';
	documentationUrl = 'calendly';
	properties: INodeProperties[] = [
		// Change name to Personal Access Token once API Keys
		// are deprecated
		{
			displayName: 'API Key or Personal Access Token',
			name: 'apiKey',
			type: 'string',
			default: '',
		},
	];
	async authenticate(credentials: ICredentialDataDecryptedObject, requestOptions: IHttpRequestOptions): Promise<IHttpRequestOptions> {
		//check whether the token is an API Key or an access token
		const { apiKey } = credentials as { apiKey: string } ;
		const tokenType = getAuthenticationType(apiKey);
		// remove condition once v1 is deprecated
		// and only inject credentials as an access token
		if (tokenType === 'accessToken') {
			requestOptions.headers!['Authorization'] = `Bearer ${apiKey}`;
		} else {
			requestOptions.headers!['X-TOKEN'] = apiKey;
		}
		return requestOptions;
	}

	test: ICredentialTestRequest = {
		request: {
			baseURL: 'https://calendly.com',
			url: '/api/v1/users/me',
		},
	};
}

 const getAuthenticationType = (data: string): 'accessToken' | 'apiKey' => {
	// The access token is a JWT, so it will always include dots to separate
	// header, payoload and signature.
	return data.includes('.') ? 'accessToken' : 'apiKey';
};