96 lines
2.9 KiB
TypeScript
96 lines
2.9 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { TextSplitter } from 'langchain/text_splitter'
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import { SRTLoader } from 'langchain/document_loaders/fs/srt'
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class Subtitles_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 = 'Subtitles File'
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this.name = 'subtitlesFile'
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this.type = 'Document'
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this.icon = 'subtitlesFile.svg'
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this.category = 'Document Loaders'
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this.description = `Load data from subtitles files`
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this.baseClasses = [this.type]
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this.inputs = [
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{
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label: 'Subtitles File',
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name: 'subtitlesFile',
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type: 'file',
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fileType: '.srt'
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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: 'Metadata',
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name: 'metadata',
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type: 'json',
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optional: true,
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additionalParams: true
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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 subtitlesFileBase64 = nodeData.inputs?.subtitlesFile as string
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const metadata = nodeData.inputs?.metadata
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let alldocs = []
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let files: string[] = []
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if (subtitlesFileBase64.startsWith('[') && subtitlesFileBase64.endsWith(']')) {
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files = JSON.parse(subtitlesFileBase64)
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} else {
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files = [subtitlesFileBase64]
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}
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for (const file of files) {
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const splitDataURI = file.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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const loader = new SRTLoader(blob)
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if (textSplitter) {
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const docs = await loader.loadAndSplit(textSplitter)
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alldocs.push(...docs)
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} else {
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const docs = await loader.load()
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alldocs.push(...docs)
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}
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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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let finaldocs = []
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for (const doc of alldocs) {
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const newdoc = {
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...doc,
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metadata: {
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...doc.metadata,
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...parsedMetadata
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}
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}
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finaldocs.push(newdoc)
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}
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return finaldocs
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}
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return alldocs
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}
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}
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module.exports = { nodeClass: Subtitles_DocumentLoaders }
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