88 lines
2.6 KiB
TypeScript
88 lines
2.6 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { TextSplitter } from 'langchain/text_splitter'
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import { PDFLoader } from 'langchain/document_loaders/fs/pdf'
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class Pdf_DocumentLoaders implements INode {
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label: string
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name: string
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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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constructor() {
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this.label = 'Pdf File'
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this.name = 'pdfFile'
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this.type = 'Document'
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this.icon = 'pdf.svg'
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this.category = 'Document Loaders'
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this.description = `Load data from PDF files`
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this.baseClasses = [this.type]
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this.inputs = [
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{
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label: 'Pdf File',
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name: 'pdfFile',
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type: 'file',
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fileType: '.pdf'
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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: 'Usage',
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name: 'usage',
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type: 'options',
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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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}
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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 pdfFileBase64 = nodeData.inputs?.pdfFile as string
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const usage = nodeData.inputs?.usage as string
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const splitDataURI = pdfFileBase64.split(',')
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splitDataURI.pop()
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const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
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const blob = new Blob([bf])
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if (usage === 'perFile') {
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const loader = new PDFLoader(blob, { splitPages: false })
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if (textSplitter) {
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const docs = await loader.loadAndSplit(textSplitter)
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return docs
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} else {
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const docs = await loader.load()
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return docs
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}
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} else {
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const loader = new PDFLoader(blob)
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if (textSplitter) {
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const docs = await loader.loadAndSplit(textSplitter)
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return docs
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} else {
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const docs = await loader.load()
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return docs
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}
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}
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}
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}
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module.exports = { nodeClass: Pdf_DocumentLoaders }
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