254 lines
10 KiB
TypeScript
254 lines
10 KiB
TypeScript
import { omit } from 'lodash'
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import { INode, INodeData, INodeOutputsValue, INodeParams } from '../../../src/Interface'
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import { TextSplitter } from 'langchain/text_splitter'
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import { TextLoader } from 'langchain/document_loaders/fs/text'
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import { DirectoryLoader } from 'langchain/document_loaders/fs/directory'
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import { JSONLinesLoader, JSONLoader } from 'langchain/document_loaders/fs/json'
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import { CSVLoader } from '@langchain/community/document_loaders/fs/csv'
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import { PDFLoader } from '@langchain/community/document_loaders/fs/pdf'
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import { DocxLoader } from '@langchain/community/document_loaders/fs/docx'
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import { LoadOfSheet } from '../MicrosoftExcel/ExcelLoader'
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import { PowerpointLoader } from '../MicrosoftPowerpoint/PowerpointLoader'
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import { handleEscapeCharacters } from '../../../src/utils'
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import { isPathTraversal } from '../../../src/validator'
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class Folder_DocumentLoaders implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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inputs: INodeParams[]
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outputs: INodeOutputsValue[]
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constructor() {
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this.label = 'Folder with Files'
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this.name = 'folderFiles'
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this.version = 4.0
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this.type = 'Document'
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this.icon = 'folder.svg'
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this.category = 'Document Loaders'
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this.description = `Load data from folder with multiple files`
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this.baseClasses = [this.type]
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this.inputs = [
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{
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label: 'Folder Path',
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name: 'folderPath',
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type: 'string',
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placeholder: ''
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},
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{
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label: 'Recursive',
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name: 'recursive',
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type: 'boolean',
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additionalParams: false
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},
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{
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label: 'Text Splitter',
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name: 'textSplitter',
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type: 'TextSplitter',
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optional: true
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},
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{
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label: 'Pdf Usage',
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name: 'pdfUsage',
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type: 'options',
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description: 'Only when loading PDF files',
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options: [
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{
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label: 'One document per page',
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name: 'perPage'
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},
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{
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label: 'One document per file',
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name: 'perFile'
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}
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],
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default: 'perPage',
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optional: true,
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additionalParams: true
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},
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{
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label: 'JSONL Pointer Extraction',
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name: 'pointerName',
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type: 'string',
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description: 'Only when loading JSONL files',
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placeholder: '<pointerName>',
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optional: true,
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additionalParams: true
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},
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{
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label: 'Additional Metadata',
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name: 'metadata',
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type: 'json',
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description: 'Additional metadata to be added to the extracted documents',
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optional: true,
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additionalParams: true
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},
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{
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label: 'Omit Metadata Keys',
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name: 'omitMetadataKeys',
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type: 'string',
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rows: 4,
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description:
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'Each document loader comes with a default set of metadata keys that are extracted from the document. You can use this field to omit some of the default metadata keys. The value should be a list of keys, seperated by comma. Use * to omit all metadata keys execept the ones you specify in the Additional Metadata field',
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placeholder: 'key1, key2, key3.nestedKey1',
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optional: true,
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additionalParams: true
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}
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]
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this.outputs = [
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{
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label: 'Document',
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name: 'document',
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description: 'Array of document objects containing metadata and pageContent',
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baseClasses: [...this.baseClasses, 'json']
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},
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{
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label: 'Text',
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name: 'text',
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description: 'Concatenated string from pageContent of documents',
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baseClasses: ['string', 'json']
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}
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]
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}
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async init(nodeData: INodeData): Promise<any> {
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const textSplitter = nodeData.inputs?.textSplitter as TextSplitter
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const folderPath = nodeData.inputs?.folderPath as string
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const metadata = nodeData.inputs?.metadata
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const recursive = nodeData.inputs?.recursive as boolean
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const pdfUsage = nodeData.inputs?.pdfUsage
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const pointerName = nodeData.inputs?.pointerName as string
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const _omitMetadataKeys = nodeData.inputs?.omitMetadataKeys as string
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const output = nodeData.outputs?.output as string
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if (!folderPath) {
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throw new Error('Folder path is required')
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}
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if (isPathTraversal(folderPath)) {
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throw new Error('Invalid folder path: Path traversal detected. Please provide a safe folder path.')
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}
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let omitMetadataKeys: string[] = []
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if (_omitMetadataKeys) {
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omitMetadataKeys = _omitMetadataKeys.split(',').map((key) => key.trim())
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}
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const loader = new DirectoryLoader(
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folderPath,
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{
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'.json': (path) => new JSONLoader(path),
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'.jsonl': (blob) => new JSONLinesLoader(blob, '/' + pointerName.trim()),
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'.txt': (path) => new TextLoader(path),
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'.csv': (path) => new CSVLoader(path),
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'.xls': (path) => new LoadOfSheet(path),
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'.xlsx': (path) => new LoadOfSheet(path),
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'.xlsm': (path) => new LoadOfSheet(path),
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'.xlsb': (path) => new LoadOfSheet(path),
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'.doc': (path) => new DocxLoader(path),
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'.docx': (path) => new DocxLoader(path),
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'.ppt': (path) => new PowerpointLoader(path),
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'.pptx': (path) => new PowerpointLoader(path),
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'.pdf': (path) =>
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pdfUsage === 'perFile'
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? // @ts-ignore
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new PDFLoader(path, { splitPages: false, pdfjs: () => import('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js') })
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: // @ts-ignore
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new PDFLoader(path, { pdfjs: () => import('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js') }),
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'.aspx': (path) => new TextLoader(path),
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'.asp': (path) => new TextLoader(path),
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'.cpp': (path) => new TextLoader(path), // C++
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'.c': (path) => new TextLoader(path),
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'.cs': (path) => new TextLoader(path),
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'.css': (path) => new TextLoader(path),
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'.go': (path) => new TextLoader(path), // Go
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'.h': (path) => new TextLoader(path), // C++ Header files
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'.kt': (path) => new TextLoader(path), // Kotlin
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'.java': (path) => new TextLoader(path), // Java
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'.js': (path) => new TextLoader(path), // JavaScript
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'.less': (path) => new TextLoader(path), // Less files
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'.ts': (path) => new TextLoader(path), // TypeScript
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'.php': (path) => new TextLoader(path), // PHP
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'.proto': (path) => new TextLoader(path), // Protocol Buffers
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'.python': (path) => new TextLoader(path), // Python
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'.py': (path) => new TextLoader(path), // Python
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'.rst': (path) => new TextLoader(path), // reStructuredText
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'.ruby': (path) => new TextLoader(path), // Ruby
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'.rb': (path) => new TextLoader(path), // Ruby
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'.rs': (path) => new TextLoader(path), // Rust
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'.scala': (path) => new TextLoader(path), // Scala
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'.sc': (path) => new TextLoader(path), // Scala
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'.scss': (path) => new TextLoader(path), // Sass
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'.sol': (path) => new TextLoader(path), // Solidity
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'.sql': (path) => new TextLoader(path), //SQL
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'.swift': (path) => new TextLoader(path), // Swift
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'.markdown': (path) => new TextLoader(path), // Markdown
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'.md': (path) => new TextLoader(path), // Markdown
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'.tex': (path) => new TextLoader(path), // LaTeX
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'.ltx': (path) => new TextLoader(path), // LaTeX
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'.html': (path) => new TextLoader(path), // HTML
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'.vb': (path) => new TextLoader(path), // Visual Basic
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'.xml': (path) => new TextLoader(path) // XML
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},
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recursive
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)
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let docs = []
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if (textSplitter) {
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docs = await loader.load()
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docs = await textSplitter.splitDocuments(docs)
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} else {
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docs = await loader.load()
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}
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if (metadata) {
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const parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata)
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docs = docs.map((doc) => ({
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...doc,
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metadata:
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_omitMetadataKeys === '*'
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? {
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...parsedMetadata
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}
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: omit(
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{
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...doc.metadata,
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...parsedMetadata
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},
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omitMetadataKeys
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)
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}))
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} else {
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docs = docs.map((doc) => ({
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...doc,
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metadata:
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_omitMetadataKeys === '*'
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? {}
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: omit(
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{
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...doc.metadata
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},
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omitMetadataKeys
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)
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}))
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}
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if (output === 'document') {
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return docs
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} else {
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let finaltext = ''
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for (const doc of docs) {
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finaltext += `${doc.pageContent}\n`
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}
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return handleEscapeCharacters(finaltext, false)
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}
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}
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}
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module.exports = { nodeClass: Folder_DocumentLoaders }
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