139 lines
4.4 KiB
TypeScript
139 lines
4.4 KiB
TypeScript
import { OpenAIChatInput, ChatOpenAI } from '@langchain/openai'
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import { BaseCache } from '@langchain/core/caches'
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import { BaseLLMParams } from '@langchain/core/language_models/llms'
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import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
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class ChatLitellm_ChatModels implements INode {
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label: string
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name: string
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version: number
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type: string
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icon: string
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category: string
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description: string
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baseClasses: string[]
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credential: INodeParams
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inputs: INodeParams[]
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constructor() {
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this.label = 'ChatLitellm'
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this.name = 'chatLitellm'
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this.version = 1.0
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this.type = 'ChatLitellm'
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this.icon = 'litellm.jpg'
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this.category = 'Chat Models'
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this.description = 'Connect to a Litellm server using OpenAI-compatible API'
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this.baseClasses = [this.type, 'BaseChatModel', ...getBaseClasses(ChatOpenAI)]
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this.credential = {
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label: 'Connect Credential',
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name: 'credential',
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type: 'credential',
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credentialNames: ['litellmApi'],
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optional: true
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}
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this.inputs = [
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{
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label: 'Cache',
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name: 'cache',
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type: 'BaseCache',
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optional: true
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},
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{
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label: 'Base URL',
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name: 'basePath',
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type: 'string',
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placeholder: 'http://localhost:8000'
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},
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{
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label: 'Model Name',
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name: 'modelName',
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type: 'string',
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placeholder: 'model_name'
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},
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{
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label: 'Temperature',
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name: 'temperature',
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type: 'number',
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step: 0.1,
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default: 0.9,
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optional: true
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},
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{
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label: 'Streaming',
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name: 'streaming',
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type: 'boolean',
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default: true,
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optional: true,
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additionalParams: true
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},
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{
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label: 'Max Tokens',
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name: 'maxTokens',
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type: 'number',
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step: 1,
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optional: true,
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additionalParams: true
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},
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{
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label: 'Top P',
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name: 'topP',
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type: 'number',
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step: 0.1,
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optional: true,
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additionalParams: true
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},
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{
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label: 'Timeout',
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name: 'timeout',
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type: 'number',
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step: 1,
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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, _: string, options: ICommonObject): Promise<any> {
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const cache = nodeData.inputs?.cache as BaseCache
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const basePath = nodeData.inputs?.basePath as string
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const modelName = nodeData.inputs?.modelName as string
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const temperature = nodeData.inputs?.temperature as string
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const streaming = nodeData.inputs?.streaming as boolean
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const maxTokens = nodeData.inputs?.maxTokens as string
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const topP = nodeData.inputs?.topP as string
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const timeout = nodeData.inputs?.timeout as string
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const credentialData = await getCredentialData(nodeData.credential ?? '', options)
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const apiKey = getCredentialParam('litellmApiKey', credentialData, nodeData)
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const obj: Partial<OpenAIChatInput> &
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BaseLLMParams & { openAIApiKey?: string } & { configuration?: { baseURL?: string; defaultHeaders?: ICommonObject } } = {
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temperature: parseFloat(temperature),
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modelName,
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streaming: streaming ?? true
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}
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if (basePath) {
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obj.configuration = {
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baseURL: basePath
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}
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}
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if (maxTokens) obj.maxTokens = parseInt(maxTokens, 10)
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if (topP) obj.topP = parseFloat(topP)
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if (timeout) obj.timeout = parseInt(timeout, 10)
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if (cache) obj.cache = cache
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if (apiKey) {
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obj.openAIApiKey = apiKey
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obj.apiKey = apiKey
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}
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const model = new ChatOpenAI(obj)
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return model
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}
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}
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module.exports = { nodeClass: ChatLitellm_ChatModels }
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