86 lines
2.3 KiB
TypeScript
86 lines
2.3 KiB
TypeScript
import { z } from 'zod'
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import { StructuredTool, ToolParams } from '@langchain/core/tools'
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import { Serializable } from '@langchain/core/load/serializable'
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import { NodeFileStore } from 'langchain/stores/file/node'
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import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses } from '../../../src/utils'
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abstract class BaseFileStore extends Serializable {
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abstract readFile(path: string): Promise<string>
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abstract writeFile(path: string, contents: string): Promise<void>
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}
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class ReadFile_Tools 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 = 'Read File'
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this.name = 'readFile'
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this.version = 1.0
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this.type = 'ReadFile'
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this.icon = 'readfile.svg'
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this.category = 'Tools'
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this.description = 'Read file from disk'
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this.baseClasses = [this.type, 'Tool', ...getBaseClasses(ReadFileTool)]
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this.inputs = [
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{
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label: 'Base Path',
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name: 'basePath',
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placeholder: `C:\\Users\\User\\Desktop`,
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type: 'string',
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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 basePath = nodeData.inputs?.basePath as string
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const store = basePath ? new NodeFileStore(basePath) : new NodeFileStore()
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return new ReadFileTool({ store })
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}
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}
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interface ReadFileParams extends ToolParams {
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store: BaseFileStore
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}
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/**
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* Class for reading files from the disk. Extends the StructuredTool
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* class.
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*/
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export class ReadFileTool extends StructuredTool {
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static lc_name() {
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return 'ReadFileTool'
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}
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schema = z.object({
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file_path: z.string().describe('name of file')
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}) as any
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name = 'read_file'
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description = 'Read file from disk'
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store: BaseFileStore
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constructor({ store }: ReadFileParams) {
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super(...arguments)
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this.store = store
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}
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async _call({ file_path }: z.infer<typeof this.schema>) {
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return await this.store.readFile(file_path)
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}
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}
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module.exports = { nodeClass: ReadFile_Tools }
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