116 lines
4.4 KiB
TypeScript
116 lines
4.4 KiB
TypeScript
import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
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import { ChatGoogleVertexAI, GoogleVertexAIChatInput } from 'langchain/chat_models/googlevertexai'
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import { GoogleAuthOptions } from 'google-auth-library'
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class GoogleVertexAI_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 = 'ChatGoogleVertexAI'
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this.name = 'chatGoogleVertexAI'
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this.version = 1.0
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this.type = 'ChatGoogleVertexAI'
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this.icon = 'vertexai.svg'
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this.category = 'Chat Models'
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this.description = 'Wrapper around VertexAI large language models that use the Chat endpoint'
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this.baseClasses = [this.type, ...getBaseClasses(ChatGoogleVertexAI)]
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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: ['googleVertexAuth']
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}
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this.inputs = [
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{
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label: 'Model Name',
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name: 'modelName',
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type: 'options',
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options: [
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{
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label: 'chat-bison',
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name: 'chat-bison'
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},
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{
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label: 'codechat-bison',
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name: 'codechat-bison'
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}
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],
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default: 'chat-bison',
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optional: true
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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: 'Max Output Tokens',
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name: 'maxOutputTokens',
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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 Probability',
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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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}
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async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
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const credentialData = await getCredentialData(nodeData.credential ?? '', options)
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const googleApplicationCredentialFilePath = getCredentialParam('googleApplicationCredentialFilePath', credentialData, nodeData)
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const googleApplicationCredential = getCredentialParam('googleApplicationCredential', credentialData, nodeData)
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const projectID = getCredentialParam('projectID', credentialData, nodeData)
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if (!googleApplicationCredentialFilePath && !googleApplicationCredential)
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throw new Error('Please specify your Google Application Credential')
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if (googleApplicationCredentialFilePath && googleApplicationCredential)
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throw new Error('Please use either Google Application Credential File Path or Google Credential JSON Object')
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const authOptions: GoogleAuthOptions = {}
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if (googleApplicationCredentialFilePath && !googleApplicationCredential) authOptions.keyFile = googleApplicationCredentialFilePath
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else if (!googleApplicationCredentialFilePath && googleApplicationCredential)
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authOptions.credentials = JSON.parse(googleApplicationCredential)
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if (projectID) authOptions.projectId = projectID
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const temperature = nodeData.inputs?.temperature as string
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const modelName = nodeData.inputs?.modelName as string
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const maxOutputTokens = nodeData.inputs?.maxOutputTokens as string
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const topP = nodeData.inputs?.topP as string
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const obj: Partial<GoogleVertexAIChatInput> = {
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temperature: parseFloat(temperature),
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model: modelName,
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authOptions
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}
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if (maxOutputTokens) obj.maxOutputTokens = parseInt(maxOutputTokens, 10)
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if (topP) obj.topP = parseFloat(topP)
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const model = new ChatGoogleVertexAI(obj)
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return model
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}
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}
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module.exports = { nodeClass: GoogleVertexAI_ChatModels }
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