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import { INode, INodeData, INodeParams } from '../../../src/Interface'
import { TextSplitter } from 'langchain/text_splitter'
import { TextLoader } from 'langchain/document_loaders/fs/text'
import { DirectoryLoader } from 'langchain/document_loaders/fs/directory'
import { JSONLoader } from 'langchain/document_loaders/fs/json'
import { CSVLoader } from 'langchain/document_loaders/fs/csv'
import { PDFLoader } from 'langchain/document_loaders/fs/pdf'
import { DocxLoader } from 'langchain/document_loaders/fs/docx'
class Folder_DocumentLoaders implements INode {
label: string
name: string
description: string
type: string
icon: string
category: string
baseClasses: string[]
inputs: INodeParams[]
constructor() {
this.label = 'Folder with Files'
this.name = 'folderFiles'
this.type = 'Document'
this.icon = 'folder.svg'
this.category = 'Document Loaders'
this.description = `Load data from folder with multiple files`
this.baseClasses = [this.type]
this.inputs = [
{
label: 'Folder Path',
name: 'folderPath',
type: 'string',
placeholder: ''
},
{
label: 'Text Splitter',
name: 'textSplitter',
type: 'TextSplitter',
optional: true
},
{
label: 'Metadata',
name: 'metadata',
type: 'json',
optional: true,
additionalParams: true
}
]
}
async init(nodeData: INodeData): Promise<any> {
const textSplitter = nodeData.inputs?.textSplitter as TextSplitter
const folderPath = nodeData.inputs?.folderPath as string
const metadata = nodeData.inputs?.metadata
const loader = new DirectoryLoader(folderPath, {
'.json': (path) => new JSONLoader(path),
'.txt': (path) => new TextLoader(path),
'.csv': (path) => new CSVLoader(path),
'.docx': (path) => new DocxLoader(path),
// @ts-ignore
'.pdf': (path) => new PDFLoader(path, { pdfjs: () => import('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js') })
})
let docs = []
if (textSplitter) {
docs = await loader.loadAndSplit(textSplitter)
} else {
docs = await loader.load()
}
if (metadata) {
const parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata)
let finaldocs = []
for (const doc of docs) {
const newdoc = {
...doc,
metadata: {
...doc.metadata,
...parsedMetadata
}
}
finaldocs.push(newdoc)
}
return finaldocs
}
return docs
}
}
module.exports = { nodeClass: Folder_DocumentLoaders }
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