79 lines
2.8 KiB
TypeScript
79 lines
2.8 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses } from '../../../src/utils'
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import { RecursiveCharacterTextSplitter, RecursiveCharacterTextSplitterParams } from 'langchain/text_splitter'
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class RecursiveCharacterTextSplitter_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 = 'Recursive Character Text Splitter'
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this.name = 'recursiveCharacterTextSplitter'
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this.version = 2.0
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this.type = 'RecursiveCharacterTextSplitter'
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this.icon = 'textsplitter.svg'
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this.category = 'Text Splitters'
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this.description = `Split documents recursively by different characters - starting with "\\n\\n", then "\\n", then " "`
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this.baseClasses = [this.type, ...getBaseClasses(RecursiveCharacterTextSplitter)]
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this.inputs = [
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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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label: 'Custom Separators',
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name: 'separators',
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type: 'string',
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rows: 4,
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description: 'Array of custom separators to determine when to split the text, will override the default separators',
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placeholder: `["|", "##", ">", "-"]`,
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additionalParams: true,
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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 chunkSize = nodeData.inputs?.chunkSize as string
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const chunkOverlap = nodeData.inputs?.chunkOverlap as string
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const separators = nodeData.inputs?.separators
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const obj = {} as RecursiveCharacterTextSplitterParams
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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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if (separators) {
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try {
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obj.separators = typeof separators === 'object' ? separators : JSON.parse(separators)
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} catch (e) {
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throw new Error(e)
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}
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}
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const splitter = new RecursiveCharacterTextSplitter(obj)
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return splitter
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}
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}
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module.exports = { nodeClass: RecursiveCharacterTextSplitter_TextSplitters }
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