99 lines
3.3 KiB
TypeScript
99 lines
3.3 KiB
TypeScript
import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
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import { APIChain, createOpenAPIChain } from 'langchain/chains'
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import { getBaseClasses } from '../../../src/utils'
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import { ChatOpenAI } from 'langchain/chat_models/openai'
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import { ConsoleCallbackHandler, CustomChainHandler } from '../../../src/handler'
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class OpenApiChain_Chains implements INode {
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label: string
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name: 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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description: string
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inputs: INodeParams[]
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constructor() {
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this.label = 'OpenAPI Chain'
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this.name = 'openApiChain'
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this.type = 'openApiChain'
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this.icon = 'openapi.png'
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this.category = 'Chains'
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this.description = 'Chain to run queries against OpenAPI'
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this.baseClasses = [this.type, ...getBaseClasses(APIChain)]
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this.inputs = [
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{
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label: 'ChatOpenAI Model',
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name: 'model',
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type: 'ChatOpenAI'
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},
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{
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label: 'YAML Link',
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name: 'yamlLink',
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type: 'string',
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placeholder: 'https://api.speak.com/openapi.yaml',
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description: 'If YAML link is provided, uploaded YAML File will be ignored and YAML link will be used instead'
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},
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{
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label: 'YAML File',
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name: 'yamlFile',
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type: 'file',
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fileType: '.yaml',
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description: 'If YAML link is provided, uploaded YAML File will be ignored and YAML link will be used instead'
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},
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{
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label: 'Headers',
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name: 'headers',
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type: 'json',
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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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return await initChain(nodeData)
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}
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async run(nodeData: INodeData, input: string, options: ICommonObject): Promise<string> {
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const chain = await initChain(nodeData)
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const loggerHandler = new ConsoleCallbackHandler(options.logger)
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if (options.socketIO && options.socketIOClientId) {
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const handler = new CustomChainHandler(options.socketIO, options.socketIOClientId)
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const res = await chain.run(input, [loggerHandler, handler])
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return res
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} else {
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const res = await chain.run(input, [loggerHandler])
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return res
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}
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}
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}
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const initChain = async (nodeData: INodeData) => {
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const model = nodeData.inputs?.model as ChatOpenAI
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const headers = nodeData.inputs?.headers as string
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const yamlLink = nodeData.inputs?.yamlLink as string
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const yamlFileBase64 = nodeData.inputs?.yamlFile as string
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let yamlString = ''
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if (yamlLink) {
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yamlString = yamlLink
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} else {
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const splitDataURI = yamlFileBase64.split(',')
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splitDataURI.pop()
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const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
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yamlString = bf.toString('utf-8')
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}
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return await createOpenAPIChain(yamlString, {
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llm: model,
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headers: typeof headers === 'object' ? headers : headers ? JSON.parse(headers) : {},
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verbose: process.env.DEBUG === 'true' ? true : false
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})
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}
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module.exports = { nodeClass: OpenApiChain_Chains }
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