n8n/packages/nodes-base/nodes/Snowflake/Snowflake.node.ts
2020-12-10 10:17:16 +01:00

245 lines
5.9 KiB
TypeScript

import {
IExecuteFunctions,
} from 'n8n-core';
import {
IDataObject,
INodeExecutionData,
INodeType,
INodeTypeDescription,
} from 'n8n-workflow';
import {
connect,
copyInputItems,
destroy,
execute,
} from './GenericFunctions';
import * as snowflake from 'snowflake-sdk';
export class Snowflake implements INodeType {
description: INodeTypeDescription = {
displayName: 'Snowflake',
name: 'snowflake',
icon: 'file:snowflake.png',
group: ['input'],
version: 1,
description: 'Get, add and update data in Snowflake.',
defaults: {
name: 'Snowflake',
color: '#5ebbeb',
},
inputs: ['main'],
outputs: ['main'],
credentials: [
{
name: 'snowflake',
required: true,
},
],
properties: [
{
displayName: 'Operation',
name: 'operation',
type: 'options',
options: [
{
name: 'Execute Query',
value: 'executeQuery',
description: 'Execute an SQL query.',
},
{
name: 'Insert',
value: 'insert',
description: 'Insert rows in database.',
},
{
name: 'Update',
value: 'update',
description: 'Update rows in database.',
},
],
default: 'insert',
description: 'The operation to perform.',
},
// ----------------------------------
// executeQuery
// ----------------------------------
{
displayName: 'Query',
name: 'query',
type: 'string',
typeOptions: {
rows: 5,
},
displayOptions: {
show: {
operation: [
'executeQuery',
],
},
},
default: '',
placeholder: 'SELECT id, name FROM product WHERE id < 40',
required: true,
description: 'The SQL query to execute.',
},
// ----------------------------------
// insert
// ----------------------------------
{
displayName: 'Table',
name: 'table',
type: 'string',
displayOptions: {
show: {
operation: [
'insert',
],
},
},
default: '',
required: true,
description: 'Name of the table in which to insert data to.',
},
{
displayName: 'Columns',
name: 'columns',
type: 'string',
displayOptions: {
show: {
operation: [
'insert',
],
},
},
default: '',
placeholder: 'id,name,description',
description: 'Comma separated list of the properties which should used as columns for the new rows.',
},
// ----------------------------------
// update
// ----------------------------------
{
displayName: 'Table',
name: 'table',
type: 'string',
displayOptions: {
show: {
operation: [
'update',
],
},
},
default: '',
required: true,
description: 'Name of the table in which to update data in',
},
{
displayName: 'Update Key',
name: 'updateKey',
type: 'string',
displayOptions: {
show: {
operation: [
'update',
],
},
},
default: 'id',
required: true,
description: 'Name of the property which decides which rows in the database should be updated. Normally that would be "id".',
},
{
displayName: 'Columns',
name: 'columns',
type: 'string',
displayOptions: {
show: {
operation: [
'update',
],
},
},
default: '',
placeholder: 'name,description',
description: 'Comma separated list of the properties which should used as columns for rows to update.',
},
],
};
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const credentials = this.getCredentials('snowflake') as unknown as snowflake.ConnectionOptions;
const returnData: IDataObject[] = [];
let responseData;
const connection = snowflake.createConnection(credentials);
await connect(connection);
const items = this.getInputData();
const operation = this.getNodeParameter('operation', 0) as string;
if (operation === 'executeQuery') {
// ----------------------------------
// executeQuery
// ----------------------------------
for (let i = 0; i < items.length; i++) {
const query = this.getNodeParameter('query', i) as string;
responseData = await execute(connection, query, []);
returnData.push.apply(returnData, responseData as IDataObject[]);
}
}
if (operation === 'insert') {
// ----------------------------------
// insert
// ----------------------------------
const table = this.getNodeParameter('table', 0) as string;
const columnString = this.getNodeParameter('columns', 0) as string;
const columns = columnString.split(',').map(column => column.trim());
const query = `INSERT INTO ${table}(${columns.join(',')}) VALUES (${columns.map(column => '?').join(',')})`;
const data = copyInputItems(items, columns);
const binds = data.map((element => Object.values(element)));
await execute(connection, query, binds as unknown as snowflake.InsertBinds);
returnData.push.apply(returnData, data);
}
if (operation === 'update') {
// ----------------------------------
// update
// ----------------------------------
const table = this.getNodeParameter('table', 0) as string;
const updateKey = this.getNodeParameter('updateKey', 0) as string;
const columnString = this.getNodeParameter('columns', 0) as string;
const columns = columnString.split(',').map(column => column.trim());
if (!columns.includes(updateKey)) {
columns.unshift(updateKey);
}
const query = `UPDATE ${table} SET ${columns.map(column => `${column} = ?`).join(',')} WHERE ${updateKey} = ?;`;
const data = copyInputItems(items, columns);
const binds = data.map((element => Object.values(element).concat(element[updateKey])));
for (let i = 0; i < binds.length; i++) {
await execute(connection, query, binds[i] as unknown as snowflake.InsertBinds);
}
returnData.push.apply(returnData, data);
}
await destroy(connection);
return [this.helpers.returnJsonArray(returnData)];
}
}