mirror of
https://github.com/n8n-io/n8n.git
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375 lines
8.9 KiB
TypeScript
375 lines
8.9 KiB
TypeScript
import {
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BINARY_ENCODING,
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IExecuteFunctions,
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} from 'n8n-core';
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import {
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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IDataObject,
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} from 'n8n-workflow';
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import {
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read as xlsxRead,
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utils as xlsxUtils,
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write as xlsxWrite,
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WritingOptions,
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WorkBook,
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} from 'xlsx';
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/**
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* Flattens an object with deep data
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*
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* @param {IDataObject} data The object to flatten
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* @returns
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*/
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function flattenObject (data: IDataObject) {
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const returnData: IDataObject = {};
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for (const key1 of Object.keys(data)) {
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if (data[key1] !== null && (typeof data[key1]) === 'object') {
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const flatObject = flattenObject(data[key1] as IDataObject);
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for (const key2 in flatObject) {
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if (flatObject[key2] === undefined) {
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continue;
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}
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returnData[`${key1}.${key2}`] = flatObject[key2];
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}
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} else {
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returnData[key1] = data[key1];
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}
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}
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return returnData;
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}
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export class SpreadsheetFile implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'Spreadsheet File',
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name: 'spreadsheetFile',
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icon: 'fa:table',
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group: ['transform'],
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version: 1,
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description: 'Reads and writes data from a spreadsheet file.',
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defaults: {
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name: 'Spreadsheet File',
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color: '#2244FF',
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},
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inputs: ['main'],
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outputs: ['main'],
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properties: [
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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options: [
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{
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name: 'Read from file',
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value: 'fromFile',
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description: 'Reads data from a spreadsheet file',
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},
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{
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name: 'Write to file',
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value: 'toFile',
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description: 'Writes the workflow data to a spreadsheet file',
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},
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],
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default: 'fromFile',
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description: 'The operation to perform.',
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},
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// ----------------------------------
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// fromFile
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// ----------------------------------
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{
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displayName: 'Binary Property',
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name: 'binaryPropertyName',
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type: 'string',
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default: 'data',
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required: true,
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displayOptions: {
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show: {
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operation: [
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'fromFile',
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],
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},
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},
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placeholder: '',
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description: 'Name of the binary property from which to read<br />the binary data of the spreadsheet file.',
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},
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// ----------------------------------
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// toFile
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// ----------------------------------
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{
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displayName: 'File Format',
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name: 'fileFormat',
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type: 'options',
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options: [
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{
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name: 'CSV',
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value: 'csv',
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description: 'Comma-separated values',
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},
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{
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name: 'HTML',
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value: 'html',
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description: 'HTML Table',
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},
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{
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name: 'ODS',
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value: 'ods',
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description: 'OpenDocument Spreadsheet',
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},
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{
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name: 'RTF',
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value: 'rtf',
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description: 'Rich Text Format',
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},
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{
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name: 'XLS',
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value: 'xls',
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description: 'Excel',
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},
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],
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default: 'xls',
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displayOptions: {
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show: {
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operation: [
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'toFile'
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],
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},
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},
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description: 'The format of the file to save the data as.',
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},
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{
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displayName: 'Binary Property',
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name: 'binaryPropertyName',
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type: 'string',
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default: 'data',
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required: true,
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displayOptions: {
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show: {
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operation: [
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'toFile',
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],
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},
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},
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placeholder: '',
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description: 'Name of the binary property in which to save<br />the binary data of the spreadsheet file.',
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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placeholder: 'Add Option',
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default: {},
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options: [
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{
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displayName: 'File Name',
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name: 'fileName',
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type: 'string',
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displayOptions: {
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show: {
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'/operation': [
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'toFile',
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],
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},
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},
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default: '',
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description: 'File name to set in binary data. By default will "spreadsheet.<fileFormat>" be used.',
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},
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{
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displayName: 'RAW Data',
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name: 'rawData',
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type: 'boolean',
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displayOptions: {
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show: {
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'/operation': [
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'fromFile'
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],
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},
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},
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default: false,
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description: 'If the data should be returned RAW instead of parsed.',
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},
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{
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displayName: 'Read As String',
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name: 'readAsString',
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type: 'boolean',
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displayOptions: {
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show: {
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'/operation': [
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'fromFile'
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],
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},
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},
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default: false,
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description: 'In some cases and file formats, it is necessary to read<br />specifically as string else some special character get interpreted wrong.',
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},
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{
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displayName: 'Sheet Name',
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name: 'sheetName',
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type: 'string',
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displayOptions: {
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show: {
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'/operation': [
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'fromFile',
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],
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},
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},
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default: 'Sheet',
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description: 'Name of the sheet to read from in the spreadsheet (if supported). If not set, the first one gets chosen.',
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},
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{
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displayName: 'Sheet Name',
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name: 'sheetName',
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type: 'string',
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displayOptions: {
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show: {
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'/operation': [
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'toFile',
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],
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'/fileFormat': [
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'ods',
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'xls',
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],
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},
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},
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default: 'Sheet',
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description: 'Name of the sheet to create in the spreadsheet.',
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},
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],
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},
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]
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};
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async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
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const items = this.getInputData();
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const operation = this.getNodeParameter('operation', 0) as string;
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const newItems: INodeExecutionData[] = [];
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if (operation === 'fromFile') {
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// Read data from spreadsheet file to workflow
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let item: INodeExecutionData;
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for (let i = 0; i < items.length; i++) {
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item = items[i];
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const binaryPropertyName = this.getNodeParameter('binaryPropertyName', i) as string;
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const options = this.getNodeParameter('options', i, {}) as IDataObject;
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if (item.binary === undefined || item.binary[binaryPropertyName] === undefined) {
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// Property did not get found on item
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continue;
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}
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// Read the binary spreadsheet data
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const binaryData = Buffer.from(item.binary[binaryPropertyName].data, BINARY_ENCODING);
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let workbook;
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if (options.readAsString === true) {
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workbook = xlsxRead(binaryData.toString(), { type: 'string', raw: options.rawData as boolean });
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} else {
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workbook = xlsxRead(binaryData, { raw: options.rawData as boolean });
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}
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if (workbook.SheetNames.length === 0) {
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throw new Error('Spreadsheet does not have any sheets!');
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}
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let sheetName = workbook.SheetNames[0];
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if (options.sheetName) {
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if (!workbook.SheetNames.includes(options.sheetName as string)) {
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throw new Error(`Spreadsheet does not contain sheet called "${options.sheetName}"!`);
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}
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sheetName = options.sheetName as string;
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}
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// Convert it to json
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const sheetJson = xlsxUtils.sheet_to_json(workbook.Sheets[sheetName]);
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// Check if data could be found in file
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if (sheetJson.length === 0) {
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continue;
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}
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// Add all the found data columns to the workflow data
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for (const rowData of sheetJson) {
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newItems.push({ json: rowData } as INodeExecutionData);
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}
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}
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return this.prepareOutputData(newItems);
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} else if (operation === 'toFile') {
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// Write the workflow data to spreadsheet file
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const binaryPropertyName = this.getNodeParameter('binaryPropertyName', 0) as string;
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const fileFormat = this.getNodeParameter('fileFormat', 0) as string;
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const options = this.getNodeParameter('options', 0, {}) as IDataObject;
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// Get the json data of the items and flatten it
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let item: INodeExecutionData;
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const itemData: IDataObject[] = [];
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for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
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item = items[itemIndex];
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itemData.push(flattenObject(item.json));
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}
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const ws = xlsxUtils.json_to_sheet(itemData);
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const wopts: WritingOptions = {
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bookSST: false,
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type: 'buffer'
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};
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if (fileFormat === 'csv') {
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wopts.bookType = 'csv';
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} else if (fileFormat === 'html') {
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wopts.bookType = 'html';
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} else if (fileFormat === 'rtf') {
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wopts.bookType = 'rtf';
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} else if (fileFormat === 'ods') {
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wopts.bookType = 'ods';
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} else if (fileFormat === 'xls') {
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wopts.bookType = 'xls';
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}
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// Convert the data in the correct format
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const sheetName = options.sheetName as string || 'Sheet';
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const wb: WorkBook = {
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SheetNames: [sheetName],
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Sheets: {
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[sheetName]: ws,
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}
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};
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const wbout = xlsxWrite(wb, wopts);
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// Create a new item with only the binary spreadsheet data
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const newItem: INodeExecutionData = {
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json: {},
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binary: {},
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};
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let fileName = `spreadsheet.${fileFormat}`;
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if (options.fileName !== undefined) {
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fileName = options.fileName as string;
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}
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newItem.binary![binaryPropertyName] = await this.helpers.prepareBinaryData(wbout, fileName);
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const newItems = [];
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newItems.push(newItem);
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return this.prepareOutputData(newItems);
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} else {
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throw new Error(`The operation "${operation}" is not supported!`);
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}
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}
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}
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