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150 lines
4 KiB
TypeScript
150 lines
4 KiB
TypeScript
import {IExecuteFunctions} from 'n8n-core';
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import {
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IDataObject,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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} from 'n8n-workflow';
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import { awsApiRequestREST } from './GenericFunctions';
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function decodeAttribute(type: string, attribute: any): any {
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switch (type) {
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case 'S':
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return String(attribute);
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case 'SS':
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case 'M':
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case 'L':
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case 'NS':
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return Array(...attribute);
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case 'N':
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return Number(attribute);
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case 'BOOL':
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return Boolean(attribute);
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}
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}
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export class AwsDynamoDB implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'AWS DynamoDB',
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name: 'awsDynamoDb',
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icon: 'file:dynamodb.svg',
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group: ['transform'],
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version: 1,
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description: 'Query data on AWS DynamoDB',
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defaults: {
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name: 'AWS DynamoDB',
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color: '#2273b9',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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name: 'aws',
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required: true,
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},
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],
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properties: [
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{
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displayName: 'Resource',
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name: 'resource',
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type: 'options',
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options: [
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{
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name: 'Item',
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value: 'item',
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description: 'Query Items',
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},
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{
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name: 'Query',
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value: 'query',
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description: 'Invoke a function',
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},
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],
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default: 'item',
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description: 'The resource to operate on.',
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},
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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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displayOptions: {
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show: {
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resource: ['item'],
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}
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},
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options: [
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{
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name: 'GetItem',
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value: 'get',
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description: 'Read an item.',
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},
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],
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default: 'get',
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description: 'The operation to perform.',
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},
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{
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displayName: 'Table',
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name: 'table',
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type: 'string',
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required: true,
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displayOptions: {
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show: {
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resource: ['item', 'query'],
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}
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},
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default: '',
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description: 'Specify the table you want to operate on',
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},
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{
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displayName: 'Item',
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name: 'item',
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type: 'string',
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required: true,
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displayOptions: {
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show: {
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resource: ['item'],
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operation: ['get'],
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}
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},
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default: '',
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description: 'Specify the Item you want to operate on',
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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 resource = this.getNodeParameter('resource', 0) as string;
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const operation = this.getNodeParameter('operation', 0) as string;
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if (resource === 'item') {
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if (operation === 'get') {
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const table = this.getNodeParameter('table', 0) as string;
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const item = this.getNodeParameter('item', 0) as string;
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const body = {
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TableName: table,
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Key: {id: {S: item}},
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};
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const headers = {
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'X-Amz-Target': 'DynamoDB_20120810.GetItem',
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'Content-Type': 'application/x-amz-json-1.0'
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};
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const response = await awsApiRequestREST.call(this, 'dynamodb', 'POST', '/', JSON.stringify(body), headers)
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const _item: any = {};
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for (const [attribute, value] of Object.entries(response.Item)) {
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const [type, content] = Object.entries(value)[0];
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_item[attribute] = decodeAttribute(type, content);
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}
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return [this.helpers.returnJsonArray(_item)];
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}
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}
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return [[]];
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}
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}
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