n8n/packages/nodes-base/nodes/HackerNews/HackerNews.node.ts
कारतोफ्फेलस्क्रिप्ट™ 7a4e9ef5fa
refactor: Remove n8n-core dependency in nodes-base (no-changelog) (#5649)
2023-03-09 18:13:15 +01:00

366 lines
8.6 KiB
TypeScript

import type {
IExecuteFunctions,
IDataObject,
INodeExecutionData,
INodeType,
INodeTypeDescription,
} from 'n8n-workflow';
import { NodeOperationError } from 'n8n-workflow';
import { hackerNewsApiRequest, hackerNewsApiRequestAllItems } from './GenericFunctions';
export class HackerNews implements INodeType {
description: INodeTypeDescription = {
displayName: 'Hacker News',
name: 'hackerNews',
// eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg
icon: 'file:hackernews.png',
group: ['transform'],
version: 1,
subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
description: 'Consume Hacker News API',
defaults: {
name: 'Hacker News',
},
inputs: ['main'],
outputs: ['main'],
properties: [
// ----------------------------------
// Resources
// ----------------------------------
{
displayName: 'Resource',
name: 'resource',
type: 'options',
noDataExpression: true,
options: [
{
name: 'All',
value: 'all',
},
{
name: 'Article',
value: 'article',
},
{
name: 'User',
value: 'user',
},
],
default: 'article',
},
// ----------------------------------
// Operations
// ----------------------------------
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
displayOptions: {
show: {
resource: ['all'],
},
},
options: [
{
name: 'Get Many',
value: 'getAll',
description: 'Get many items',
action: 'Get many items',
},
],
default: 'getAll',
},
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
displayOptions: {
show: {
resource: ['article'],
},
},
options: [
{
name: 'Get',
value: 'get',
description: 'Get a Hacker News article',
action: 'Get an article',
},
],
default: 'get',
},
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
displayOptions: {
show: {
resource: ['user'],
},
},
options: [
{
name: 'Get',
value: 'get',
description: 'Get a Hacker News user',
action: 'Get a user',
},
],
default: 'get',
},
// ----------------------------------
// Fields
// ----------------------------------
{
displayName: 'Article ID',
name: 'articleId',
type: 'string',
required: true,
default: '',
description: 'The ID of the Hacker News article to be returned',
displayOptions: {
show: {
resource: ['article'],
operation: ['get'],
},
},
},
{
displayName: 'Username',
name: 'username',
type: 'string',
required: true,
default: '',
description: 'The Hacker News user to be returned',
displayOptions: {
show: {
resource: ['user'],
operation: ['get'],
},
},
},
{
displayName: 'Return All',
name: 'returnAll',
type: 'boolean',
default: false,
description: 'Whether to return all results or only up to a given limit',
displayOptions: {
show: {
resource: ['all'],
operation: ['getAll'],
},
},
},
{
displayName: 'Limit',
name: 'limit',
type: 'number',
typeOptions: {
minValue: 1,
},
default: 100,
description: 'Max number of results to return',
displayOptions: {
show: {
resource: ['all'],
operation: ['getAll'],
returnAll: [false],
},
},
},
{
displayName: 'Additional Fields',
name: 'additionalFields',
type: 'collection',
placeholder: 'Add Field',
default: {},
displayOptions: {
show: {
resource: ['article'],
operation: ['get'],
},
},
options: [
{
displayName: 'Include Comments',
name: 'includeComments',
type: 'boolean',
default: false,
description: 'Whether to include all the comments in a Hacker News article',
},
],
},
{
displayName: 'Additional Fields',
name: 'additionalFields',
type: 'collection',
placeholder: 'Add Field',
default: {},
displayOptions: {
show: {
resource: ['all'],
operation: ['getAll'],
},
},
options: [
{
displayName: 'Keyword',
name: 'keyword',
type: 'string',
default: '',
description: 'The keyword for filtering the results of the query',
},
{
displayName: 'Tags',
name: 'tags',
type: 'multiOptions',
options: [
{
name: 'Ask HN',
value: 'ask_hn', // snake case per HN tags
description: 'Returns query results filtered by Ask HN tag',
},
{
name: 'Comment',
value: 'comment',
description: 'Returns query results filtered by comment tag',
},
{
name: 'Front Page',
value: 'front_page', // snake case per HN tags
description: 'Returns query results filtered by Front Page tag',
},
{
name: 'Poll',
value: 'poll',
description: 'Returns query results filtered by poll tag',
},
{
name: 'Show HN',
value: 'show_hn', // snake case per HN tags
description: 'Returns query results filtered by Show HN tag',
},
{
name: 'Story',
value: 'story',
description: 'Returns query results filtered by story tag',
},
],
default: [],
description: 'Tags for filtering the results of the query',
},
],
},
],
};
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const items = this.getInputData();
const returnData: INodeExecutionData[] = [];
const resource = this.getNodeParameter('resource', 0);
const operation = this.getNodeParameter('operation', 0);
let returnAll = false;
for (let i = 0; i < items.length; i++) {
try {
let qs: IDataObject = {};
let endpoint = '';
let includeComments = false;
if (resource === 'all') {
if (operation === 'getAll') {
const additionalFields = this.getNodeParameter('additionalFields', i);
const keyword = additionalFields.keyword as string;
const tags = additionalFields.tags as string[];
qs = {
query: keyword,
tags: tags ? tags.join() : '',
};
returnAll = this.getNodeParameter('returnAll', i);
if (!returnAll) {
qs.hitsPerPage = this.getNodeParameter('limit', i);
}
endpoint = 'search?';
} else {
throw new NodeOperationError(
this.getNode(),
`The operation '${operation}' is unknown!`,
{ itemIndex: i },
);
}
} else if (resource === 'article') {
if (operation === 'get') {
endpoint = `items/${this.getNodeParameter('articleId', i)}`;
const additionalFields = this.getNodeParameter('additionalFields', i);
includeComments = additionalFields.includeComments as boolean;
} else {
throw new NodeOperationError(
this.getNode(),
`The operation '${operation}' is unknown!`,
{ itemIndex: i },
);
}
} else if (resource === 'user') {
if (operation === 'get') {
endpoint = `users/${this.getNodeParameter('username', i)}`;
} else {
throw new NodeOperationError(
this.getNode(),
`The operation '${operation}' is unknown!`,
{ itemIndex: i },
);
}
} else {
throw new NodeOperationError(this.getNode(), `The resource '${resource}' is unknown!`, {
itemIndex: i,
});
}
let responseData;
if (returnAll) {
responseData = await hackerNewsApiRequestAllItems.call(this, 'GET', endpoint, qs);
} else {
responseData = await hackerNewsApiRequest.call(this, 'GET', endpoint, qs);
if (resource === 'all' && operation === 'getAll') {
responseData = responseData.hits;
}
}
if (resource === 'article' && operation === 'get' && !includeComments) {
delete responseData.children;
}
const executionData = this.helpers.constructExecutionMetaData(
this.helpers.returnJsonArray(responseData as IDataObject),
{ itemData: { item: i } },
);
returnData.push(...executionData);
} 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;
}
}
return this.prepareOutputData(returnData);
}
}