n8n/packages/nodes-base/nodes/Snowflake/Snowflake.node.ts
2023-04-25 18:18:27 +02:00

249 lines
6.5 KiB
TypeScript

import type {
IExecuteFunctions,
IDataObject,
INodeExecutionData,
INodeType,
INodeTypeDescription,
} from 'n8n-workflow';
import { connect, copyInputItems, destroy, execute } from './GenericFunctions';
import snowflake from 'snowflake-sdk';
export class Snowflake implements INodeType {
description: INodeTypeDescription = {
displayName: 'Snowflake',
name: 'snowflake',
icon: 'file:snowflake.svg',
group: ['input'],
version: 1,
description: 'Get, add and update data in Snowflake',
defaults: {
name: 'Snowflake',
},
inputs: ['main'],
outputs: ['main'],
credentials: [
{
name: 'snowflake',
required: true,
},
],
properties: [
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
options: [
{
name: 'Execute Query',
value: 'executeQuery',
description: 'Execute an SQL query',
action: 'Execute a SQL query',
},
{
name: 'Insert',
value: 'insert',
description: 'Insert rows in database',
action: 'Insert rows in database',
},
{
name: 'Update',
value: 'update',
description: 'Update rows in database',
action: 'Update rows in database',
},
],
default: 'insert',
},
// ----------------------------------
// executeQuery
// ----------------------------------
{
displayName: 'Query',
name: 'query',
type: 'string',
typeOptions: {
editor: 'sqlEditor',
},
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,
// eslint-disable-next-line n8n-nodes-base/node-param-description-miscased-id
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 = (await this.getCredentials(
'snowflake',
)) as unknown as snowflake.ConnectionOptions;
const returnData: INodeExecutionData[] = [];
let responseData;
const connection = snowflake.createConnection(credentials);
await connect(connection);
const items = this.getInputData();
const operation = this.getNodeParameter('operation', 0);
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, []);
const executionData = this.helpers.constructExecutionMetaData(
this.helpers.returnJsonArray(responseData as IDataObject[]),
{ itemData: { item: i } },
);
returnData.push(...executionData);
}
}
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);
data.forEach((d, i) => {
const executionData = this.helpers.constructExecutionMetaData(
this.helpers.returnJsonArray(d),
{ itemData: { item: i } },
);
returnData.push(...executionData);
});
}
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);
}
data.forEach((d, i) => {
const executionData = this.helpers.constructExecutionMetaData(
this.helpers.returnJsonArray(d),
{ itemData: { item: i } },
);
returnData.push(...executionData);
});
}
await destroy(connection);
return this.prepareOutputData(returnData);
}
}