mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-15 17:14:05 -08:00
479 lines
14 KiB
TypeScript
479 lines
14 KiB
TypeScript
/* eslint-disable n8n-nodes-base/node-filename-against-convention */
|
|
import get from 'lodash/get';
|
|
|
|
import type {
|
|
IExecuteFunctions,
|
|
GenericValue,
|
|
INodeExecutionData,
|
|
INodeType,
|
|
INodeTypeBaseDescription,
|
|
INodeTypeDescription,
|
|
IPairedItemData,
|
|
} from 'n8n-workflow';
|
|
import { deepCopy } from 'n8n-workflow';
|
|
|
|
import { generatePairedItemData } from '../../../utils/utilities';
|
|
import { oldVersionNotice } from '@utils/descriptions';
|
|
|
|
export class MergeV1 implements INodeType {
|
|
description: INodeTypeDescription;
|
|
|
|
constructor(baseDescription: INodeTypeBaseDescription) {
|
|
this.description = {
|
|
...baseDescription,
|
|
icon: 'fa:code-branch',
|
|
version: 1,
|
|
defaults: {
|
|
name: 'Merge',
|
|
color: '#00bbcc',
|
|
},
|
|
// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
|
|
inputs: ['main', 'main'],
|
|
outputs: ['main'],
|
|
inputNames: ['Input 1', 'Input 2'],
|
|
properties: [
|
|
oldVersionNotice,
|
|
{
|
|
displayName: 'Mode',
|
|
name: 'mode',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'Append',
|
|
value: 'append',
|
|
description:
|
|
'Combines data of both inputs. The output will contain items of input 1 and input 2.',
|
|
},
|
|
{
|
|
name: 'Keep Key Matches',
|
|
value: 'keepKeyMatches',
|
|
description: 'Keeps data of input 1 if it does find a match with data of input 2',
|
|
},
|
|
{
|
|
name: 'Merge By Index',
|
|
value: 'mergeByIndex',
|
|
description:
|
|
'Merges data of both inputs. The output will contain items of input 1 merged with data of input 2. Merge happens depending on the index of the items. So first item of input 1 will be merged with first item of input 2 and so on.',
|
|
},
|
|
{
|
|
name: 'Merge By Key',
|
|
value: 'mergeByKey',
|
|
description:
|
|
'Merges data of both inputs. The output will contain items of input 1 merged with data of input 2. Merge happens depending on a defined key.',
|
|
},
|
|
{
|
|
name: 'Multiplex',
|
|
value: 'multiplex',
|
|
description:
|
|
'Merges each value of one input with each value of the other input. The output will contain (m * n) items where (m) and (n) are lengths of the inputs.',
|
|
},
|
|
{
|
|
name: 'Pass-Through',
|
|
value: 'passThrough',
|
|
description:
|
|
'Passes through data of one input. The output will contain only items of the defined input.',
|
|
},
|
|
{
|
|
name: 'Remove Key Matches',
|
|
value: 'removeKeyMatches',
|
|
description: 'Keeps data of input 1 if it does NOT find match with data of input 2',
|
|
},
|
|
{
|
|
name: 'Wait',
|
|
value: 'wait',
|
|
description:
|
|
'Waits till data of both inputs is available and will then output a single empty item. Source Nodes must connect to both Input 1 and 2. This node only supports 2 Sources, if you need more Sources, connect multiple Merge nodes in series. This node will not output any data.',
|
|
},
|
|
],
|
|
default: 'append',
|
|
description: 'How data of branches should be merged',
|
|
},
|
|
{
|
|
displayName: 'Join',
|
|
name: 'join',
|
|
type: 'options',
|
|
displayOptions: {
|
|
show: {
|
|
mode: ['mergeByIndex'],
|
|
},
|
|
},
|
|
options: [
|
|
{
|
|
name: 'Inner Join',
|
|
value: 'inner',
|
|
description:
|
|
'Merges as many items as both inputs contain. (Example: Input1 = 5 items, Input2 = 3 items | Output will contain 3 items).',
|
|
},
|
|
{
|
|
name: 'Left Join',
|
|
value: 'left',
|
|
description:
|
|
'Merges as many items as first input contains. (Example: Input1 = 3 items, Input2 = 5 items | Output will contain 3 items).',
|
|
},
|
|
{
|
|
name: 'Outer Join',
|
|
value: 'outer',
|
|
description:
|
|
'Merges as many items as input contains with most items. (Example: Input1 = 3 items, Input2 = 5 items | Output will contain 5 items).',
|
|
},
|
|
],
|
|
default: 'left',
|
|
description:
|
|
'How many items the output will contain if inputs contain different amount of items',
|
|
},
|
|
{
|
|
displayName: 'Property Input 1',
|
|
name: 'propertyName1',
|
|
type: 'string',
|
|
default: '',
|
|
hint: 'The name of the field as text (e.g. “id”)',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
mode: ['keepKeyMatches', 'mergeByKey', 'removeKeyMatches'],
|
|
},
|
|
},
|
|
description: 'Name of property which decides which items to merge of input 1',
|
|
},
|
|
{
|
|
displayName: 'Property Input 2',
|
|
name: 'propertyName2',
|
|
type: 'string',
|
|
default: '',
|
|
hint: 'The name of the field as text (e.g. “id”)',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
mode: ['keepKeyMatches', 'mergeByKey', 'removeKeyMatches'],
|
|
},
|
|
},
|
|
description: 'Name of property which decides which items to merge of input 2',
|
|
},
|
|
{
|
|
displayName: 'Output Data',
|
|
name: 'output',
|
|
type: 'options',
|
|
displayOptions: {
|
|
show: {
|
|
mode: ['passThrough'],
|
|
},
|
|
},
|
|
options: [
|
|
{
|
|
name: 'Input 1',
|
|
value: 'input1',
|
|
},
|
|
{
|
|
name: 'Input 2',
|
|
value: 'input2',
|
|
},
|
|
],
|
|
default: 'input1',
|
|
description: 'Defines of which input the data should be used as output of node',
|
|
},
|
|
{
|
|
displayName: 'Overwrite',
|
|
name: 'overwrite',
|
|
type: 'options',
|
|
displayOptions: {
|
|
show: {
|
|
mode: ['mergeByKey'],
|
|
},
|
|
},
|
|
options: [
|
|
{
|
|
name: 'Always',
|
|
value: 'always',
|
|
description: 'Always overwrites everything',
|
|
},
|
|
{
|
|
name: 'If Blank',
|
|
value: 'blank',
|
|
description: 'Overwrites only values of "null", "undefined" or empty string',
|
|
},
|
|
{
|
|
name: 'If Missing',
|
|
value: 'undefined',
|
|
description: 'Only adds values which do not exist yet',
|
|
},
|
|
],
|
|
default: 'always',
|
|
description: 'Select when to overwrite the values from Input1 with values from Input 2',
|
|
},
|
|
],
|
|
};
|
|
}
|
|
|
|
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
|
|
const returnData: INodeExecutionData[] = [];
|
|
|
|
const mode = this.getNodeParameter('mode', 0) as string;
|
|
|
|
if (mode === 'append') {
|
|
// Simply appends the data
|
|
for (let i = 0; i < 2; i++) {
|
|
returnData.push.apply(returnData, this.getInputData(i));
|
|
}
|
|
} else if (mode === 'mergeByIndex') {
|
|
// Merges data by index
|
|
|
|
const join = this.getNodeParameter('join', 0) as string;
|
|
|
|
const dataInput1 = this.getInputData(0);
|
|
const dataInput2 = this.getInputData(1);
|
|
|
|
if (dataInput1 === undefined || dataInput1.length === 0) {
|
|
if (['inner', 'left'].includes(join)) {
|
|
// When "inner" or "left" join return empty if first
|
|
// input does not contain any items
|
|
return [returnData];
|
|
}
|
|
|
|
// For "outer" return data of second input
|
|
return [dataInput2];
|
|
}
|
|
|
|
if (dataInput2 === undefined || dataInput2.length === 0) {
|
|
if (['left', 'outer'].includes(join)) {
|
|
// When "left" or "outer" join return data of first input
|
|
return [dataInput1];
|
|
}
|
|
|
|
// For "inner" return empty
|
|
return [returnData];
|
|
}
|
|
|
|
// Default "left"
|
|
let numEntries = dataInput1.length;
|
|
if (join === 'inner') {
|
|
numEntries = Math.min(dataInput1.length, dataInput2.length);
|
|
} else if (join === 'outer') {
|
|
numEntries = Math.max(dataInput1.length, dataInput2.length);
|
|
}
|
|
|
|
let newItem: INodeExecutionData;
|
|
for (let i = 0; i < numEntries; i++) {
|
|
if (i >= dataInput1.length) {
|
|
returnData.push(dataInput2[i]);
|
|
continue;
|
|
}
|
|
if (i >= dataInput2.length) {
|
|
returnData.push(dataInput1[i]);
|
|
continue;
|
|
}
|
|
|
|
newItem = {
|
|
json: {},
|
|
pairedItem: [
|
|
dataInput1[i].pairedItem as IPairedItemData,
|
|
dataInput2[i].pairedItem as IPairedItemData,
|
|
],
|
|
};
|
|
|
|
if (dataInput1[i].binary !== undefined) {
|
|
newItem.binary = {};
|
|
// Create a shallow copy of the binary data so that the old
|
|
// data references which do not get changed still stay behind
|
|
// but the incoming data does not get changed.
|
|
Object.assign(newItem.binary, dataInput1[i].binary);
|
|
}
|
|
|
|
// Create also a shallow copy of the json data
|
|
Object.assign(newItem.json, dataInput1[i].json);
|
|
|
|
// Copy json data
|
|
for (const key of Object.keys(dataInput2[i].json)) {
|
|
newItem.json[key] = dataInput2[i].json[key];
|
|
}
|
|
|
|
// Copy binary data
|
|
if (dataInput2[i].binary !== undefined) {
|
|
if (newItem.binary === undefined) {
|
|
newItem.binary = {};
|
|
}
|
|
|
|
for (const key of Object.keys(dataInput2[i].binary!)) {
|
|
newItem.binary[key] = dataInput2[i].binary![key] ?? newItem.binary[key];
|
|
}
|
|
}
|
|
|
|
returnData.push(newItem);
|
|
}
|
|
} else if (mode === 'multiplex') {
|
|
const dataInput1 = this.getInputData(0);
|
|
const dataInput2 = this.getInputData(1);
|
|
|
|
if (!dataInput1 || !dataInput2) {
|
|
return [returnData];
|
|
}
|
|
|
|
let entry1: INodeExecutionData;
|
|
let entry2: INodeExecutionData;
|
|
|
|
for (entry1 of dataInput1) {
|
|
for (entry2 of dataInput2) {
|
|
returnData.push({
|
|
json: {
|
|
...entry1.json,
|
|
...entry2.json,
|
|
},
|
|
pairedItem: [
|
|
entry1.pairedItem as IPairedItemData,
|
|
entry2.pairedItem as IPairedItemData,
|
|
],
|
|
});
|
|
}
|
|
}
|
|
return [returnData];
|
|
} else if (['keepKeyMatches', 'mergeByKey', 'removeKeyMatches'].includes(mode)) {
|
|
const dataInput1 = this.getInputData(0);
|
|
if (!dataInput1) {
|
|
// If it has no input data from first input return nothing
|
|
return [returnData];
|
|
}
|
|
|
|
const propertyName1 = this.getNodeParameter('propertyName1', 0) as string;
|
|
const propertyName2 = this.getNodeParameter('propertyName2', 0) as string;
|
|
const overwrite = this.getNodeParameter('overwrite', 0, 'always') as string;
|
|
|
|
const dataInput2 = this.getInputData(1);
|
|
if (!dataInput2 || !propertyName1 || !propertyName2) {
|
|
// Second input does not have any data or the property names are not defined
|
|
if (mode === 'keepKeyMatches') {
|
|
// For "keepKeyMatches" return nothing
|
|
return [returnData];
|
|
}
|
|
|
|
// For "mergeByKey" and "removeKeyMatches" return the data from the first input
|
|
return [dataInput1];
|
|
}
|
|
|
|
// Get the data to copy
|
|
const copyData: {
|
|
[key: string]: INodeExecutionData;
|
|
} = {};
|
|
let entry: INodeExecutionData;
|
|
for (entry of dataInput2) {
|
|
const key = get(entry.json, propertyName2);
|
|
if (!entry.json || !key) {
|
|
// Entry does not have the property so skip it
|
|
continue;
|
|
}
|
|
|
|
copyData[key as string] = entry;
|
|
}
|
|
|
|
// Copy data on entries or add matching entries
|
|
let referenceValue: GenericValue;
|
|
let key: string;
|
|
for (entry of dataInput1) {
|
|
referenceValue = get(entry.json, propertyName1);
|
|
|
|
if (referenceValue === undefined) {
|
|
// Entry does not have the property
|
|
|
|
if (mode === 'removeKeyMatches') {
|
|
// For "removeKeyMatches" add item
|
|
returnData.push(entry);
|
|
}
|
|
|
|
// For "mergeByKey" and "keepKeyMatches" skip item
|
|
continue;
|
|
}
|
|
|
|
if (!['string', 'number'].includes(typeof referenceValue)) {
|
|
if (referenceValue !== null && referenceValue.constructor.name !== 'Data') {
|
|
// Reference value is not of comparable type
|
|
|
|
if (mode === 'removeKeyMatches') {
|
|
// For "removeKeyMatches" add item
|
|
returnData.push(entry);
|
|
}
|
|
|
|
// For "mergeByKey" and "keepKeyMatches" skip item
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (typeof referenceValue === 'number') {
|
|
referenceValue = referenceValue.toString();
|
|
} else if (referenceValue !== null && referenceValue.constructor.name === 'Date') {
|
|
referenceValue = (referenceValue as Date).toISOString();
|
|
}
|
|
|
|
if (copyData.hasOwnProperty(referenceValue as string)) {
|
|
// Item with reference value got found
|
|
|
|
if (['null', 'undefined'].includes(typeof referenceValue)) {
|
|
// The reference value is null or undefined
|
|
|
|
if (mode === 'removeKeyMatches') {
|
|
// For "removeKeyMatches" add item
|
|
returnData.push(entry);
|
|
}
|
|
|
|
// For "mergeByKey" and "keepKeyMatches" skip item
|
|
continue;
|
|
}
|
|
|
|
// Match exists
|
|
if (mode === 'removeKeyMatches') {
|
|
// For "removeKeyMatches" we can skip the item as it has a match
|
|
continue;
|
|
} else if (mode === 'mergeByKey') {
|
|
// Copy the entry as the data gets changed
|
|
entry = deepCopy(entry);
|
|
|
|
for (key of Object.keys(copyData[referenceValue as string].json)) {
|
|
if (key === propertyName2) {
|
|
continue;
|
|
}
|
|
|
|
// TODO: Currently only copies json data and no binary one
|
|
const value = copyData[referenceValue as string].json[key];
|
|
if (
|
|
overwrite === 'always' ||
|
|
(overwrite === 'undefined' && !entry.json.hasOwnProperty(key)) ||
|
|
(overwrite === 'blank' && [null, undefined, ''].includes(entry.json[key] as string))
|
|
) {
|
|
entry.json[key] = value;
|
|
}
|
|
}
|
|
} else {
|
|
// For "keepKeyMatches" we add it as it is
|
|
returnData.push(entry);
|
|
continue;
|
|
}
|
|
} else {
|
|
// No item for reference value got found
|
|
if (mode === 'removeKeyMatches') {
|
|
// For "removeKeyMatches" we can add it if not match got found
|
|
returnData.push(entry);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (mode === 'mergeByKey') {
|
|
// For "mergeByKey" we always add the entry anyway but then the unchanged one
|
|
returnData.push(entry);
|
|
}
|
|
}
|
|
|
|
return [returnData];
|
|
} else if (mode === 'passThrough') {
|
|
const output = this.getNodeParameter('output', 0) as string;
|
|
|
|
if (output === 'input1') {
|
|
returnData.push.apply(returnData, this.getInputData(0));
|
|
} else {
|
|
returnData.push.apply(returnData, this.getInputData(1));
|
|
}
|
|
} else if (mode === 'wait') {
|
|
const pairedItem = generatePairedItemData(this.getInputData(0).length);
|
|
returnData.push({ json: {}, pairedItem });
|
|
}
|
|
|
|
return [returnData];
|
|
}
|
|
}
|