import type { IExecuteFunctions } from 'n8n-core'; import type { IDataObject, ILoadOptionsFunctions, INodeExecutionData, INodePropertyOptions, INodeType, INodeTypeDescription, JsonObject, } from 'n8n-workflow'; import { NodeApiError, NodeOperationError } from 'n8n-workflow'; import { googleApiRequest, googleApiRequestAllItems } from './GenericFunctions'; export class GoogleFirebaseRealtimeDatabase implements INodeType { description: INodeTypeDescription = { displayName: 'Google Cloud Realtime Database', name: 'googleFirebaseRealtimeDatabase', icon: 'file:googleFirebaseRealtimeDatabase.svg', group: ['input'], version: 1, subtitle: '={{$parameter["operation"]}}', description: 'Interact with Google Firebase - Realtime Database API', defaults: { name: 'Google Cloud Realtime Database', }, inputs: ['main'], outputs: ['main'], credentials: [ { name: 'googleFirebaseRealtimeDatabaseOAuth2Api', }, ], properties: [ { displayName: 'Project Name or ID', name: 'projectId', type: 'options', default: '', typeOptions: { loadOptionsMethod: 'getProjects', }, description: 'As displayed in firebase console URL. Choose from the list, or specify an ID using an expression.', required: true, }, { displayName: 'Operation', name: 'operation', type: 'options', noDataExpression: true, options: [ { name: 'Create', value: 'create', description: 'Write data to a database', action: 'Write data to a database', }, { name: 'Delete', value: 'delete', description: 'Delete data from a database', action: 'Delete data from a database', }, { name: 'Get', value: 'get', description: 'Get a record from a database', action: 'Get a record from a database', }, { name: 'Push', value: 'push', description: 'Append to a list of data', action: 'Append to a list of data', }, { name: 'Update', value: 'update', description: 'Update item on a database', action: 'Update item in a database', }, ], default: 'create', required: true, }, { displayName: 'Object Path', name: 'path', type: 'string', default: '', placeholder: 'e.g. /app/users', // eslint-disable-next-line n8n-nodes-base/node-param-description-miscased-json description: 'Object path on database. Do not append .json.', required: true, displayOptions: { hide: { operation: ['get'], }, }, }, { displayName: 'Object Path', name: 'path', type: 'string', default: '', placeholder: 'e.g. /app/users', // eslint-disable-next-line n8n-nodes-base/node-param-description-miscased-json description: 'Object path on database. Do not append .json.', hint: 'Leave blank to get a whole database object', displayOptions: { show: { operation: ['get'], }, }, }, { displayName: 'Columns / Attributes', name: 'attributes', type: 'string', default: '', displayOptions: { show: { operation: ['create', 'push', 'update'], }, }, description: 'Attributes to save', required: true, placeholder: 'age, name, city', }, ], }; methods = { loadOptions: { async getProjects(this: ILoadOptionsFunctions): Promise { const projects = await googleApiRequestAllItems.call( this, '', 'GET', 'results', {}, {}, {}, 'https://firebase.googleapis.com/v1beta1/projects', ); const returnData = projects // select only realtime database projects .filter( (project: IDataObject) => (project.resources as IDataObject).realtimeDatabaseInstance, ) .map((project: IDataObject) => ({ name: project.projectId, value: (project.resources as IDataObject).realtimeDatabaseInstance, })) as INodePropertyOptions[]; return returnData; }, }, }; async execute(this: IExecuteFunctions): Promise { const items = this.getInputData(); const returnData: INodeExecutionData[] = []; const length = items.length; let responseData; const operation = this.getNodeParameter('operation', 0); //https://firebase.google.com/docs/reference/rest/database if ( ['push', 'create', 'update'].includes(operation) && items.length === 1 && Object.keys(items[0].json).length === 0 ) { throw new NodeOperationError(this.getNode(), `The ${operation} operation needs input data`); } for (let i = 0; i < length; i++) { try { const projectId = this.getNodeParameter('projectId', i) as string; let method = 'GET', attributes = ''; const document: IDataObject = {}; if (operation === 'create') { method = 'PUT'; attributes = this.getNodeParameter('attributes', i) as string; } else if (operation === 'delete') { method = 'DELETE'; } else if (operation === 'get') { method = 'GET'; } else if (operation === 'push') { method = 'POST'; attributes = this.getNodeParameter('attributes', i) as string; } else if (operation === 'update') { method = 'PATCH'; attributes = this.getNodeParameter('attributes', i) as string; } if (attributes) { const attributeList = attributes.split(',').map((el) => el.trim()); attributeList.map((attribute: string) => { if (items[i].json.hasOwnProperty(attribute)) { document[attribute] = items[i].json[attribute]; } }); } responseData = await googleApiRequest.call( this, projectId, method, this.getNodeParameter('path', i) as string, document, ); if (responseData === null) { if (operation === 'get') { throw new NodeApiError(this.getNode(), responseData as JsonObject, { message: 'Requested entity was not found.', }); } else if (method === 'DELETE') { responseData = { success: true }; } } } catch (error) { if (this.continueOnFail()) { const executionErrorData = this.helpers.constructExecutionMetaData( this.helpers.returnJsonArray({ error: error.message }), { itemData: { item: i } }, ); returnData.push(...executionErrorData); continue; } throw error; } if (typeof responseData === 'string' || typeof responseData === 'number') { responseData = { [this.getNodeParameter('path', i) as string]: responseData, }; } const executionData = this.helpers.constructExecutionMetaData( this.helpers.returnJsonArray(responseData as IDataObject[]), { itemData: { item: i } }, ); returnData.push(...executionData); } return this.prepareOutputData(returnData); } }