92 lines
3.1 KiB
TypeScript
92 lines
3.1 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses } from '../../../src/utils'
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import { TokenTextSplitter, TokenTextSplitterParams } from 'langchain/text_splitter'
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import { TiktokenEncoding } from '@dqbd/tiktoken'
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class TokenTextSplitter_TextSplitters 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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constructor() {
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this.label = 'Token Text Splitter'
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this.name = 'tokenTextSplitter'
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this.version = 1.0
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this.type = 'TokenTextSplitter'
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this.icon = 'tiktoken.svg'
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this.category = 'Text Splitters'
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this.description = `Splits a raw text string by first converting the text into BPE tokens, then split these tokens into chunks and convert the tokens within a single chunk back into text.`
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this.baseClasses = [this.type, ...getBaseClasses(TokenTextSplitter)]
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this.inputs = [
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{
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label: 'Encoding Name',
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name: 'encodingName',
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type: 'options',
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options: [
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{
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label: 'gpt2',
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name: 'gpt2'
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},
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{
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label: 'r50k_base',
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name: 'r50k_base'
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},
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{
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label: 'p50k_base',
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name: 'p50k_base'
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},
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{
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label: 'p50k_edit',
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name: 'p50k_edit'
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},
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{
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label: 'cl100k_base',
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name: 'cl100k_base'
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}
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],
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default: 'gpt2'
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},
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{
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label: 'Chunk Size',
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name: 'chunkSize',
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type: 'number',
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description: 'Number of characters in each chunk. Default is 1000.',
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default: 1000,
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optional: true
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},
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{
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label: 'Chunk Overlap',
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name: 'chunkOverlap',
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type: 'number',
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description: 'Number of characters to overlap between chunks. Default is 200.',
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default: 200,
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optional: 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 encodingName = nodeData.inputs?.encodingName as string
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const chunkSize = nodeData.inputs?.chunkSize as string
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const chunkOverlap = nodeData.inputs?.chunkOverlap as string
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const obj = {} as TokenTextSplitterParams
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obj.encodingName = encodingName as TiktokenEncoding
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if (chunkSize) obj.chunkSize = parseInt(chunkSize, 10)
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if (chunkOverlap) obj.chunkOverlap = parseInt(chunkOverlap, 10)
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const splitter = new TokenTextSplitter(obj)
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return splitter
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}
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}
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module.exports = { nodeClass: TokenTextSplitter_TextSplitters }
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