238 lines
9.1 KiB
TypeScript
238 lines
9.1 KiB
TypeScript
import { ChatPerplexity as LangchainChatPerplexity, PerplexityChatInput } from '@langchain/community/chat_models/perplexity'
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import { BaseCache } from '@langchain/core/caches'
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import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../src/Interface'
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import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
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import { ChatPerplexity } from './FlowiseChatPerplexity'
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import { getModels, MODEL_TYPE } from '../../../src/modelLoader'
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class ChatPerplexity_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 = 'ChatPerplexity'
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this.name = 'chatPerplexity'
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this.version = 0.1
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this.type = 'ChatPerplexity'
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this.icon = 'perplexity.svg'
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this.category = 'Chat Models'
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this.description = 'Wrapper around Perplexity large language models that use the Chat endpoint'
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this.baseClasses = [this.type, ...getBaseClasses(LangchainChatPerplexity)]
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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: ['perplexityApi']
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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: 'Model Name',
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name: 'model',
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type: 'asyncOptions',
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loadMethod: 'listModels',
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default: 'sonar'
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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: 1,
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optional: 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: 'Top K',
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name: 'topK',
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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: 'Presence Penalty',
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name: 'presencePenalty',
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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: 'Frequency Penalty',
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name: 'frequencyPenalty',
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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: '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: '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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// label: 'Search Domain Filter',
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// name: 'searchDomainFilter',
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// type: 'json',
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// optional: true,
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// additionalParams: true,
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// description: 'Limit citations to URLs from specified domains (e.g., ["example.com", "anotherexample.org"])'
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// },
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// Currently disabled as output is stored as additional_kwargs
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// {
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// label: 'Return Images',
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// name: 'returnImages',
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// type: 'boolean',
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// optional: true,
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// additionalParams: true,
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// description: 'Whether the model should return images (if supported by the model)'
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// },
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// Currently disabled as output is stored as additional_kwargs
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// {
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// label: 'Return Related Questions',
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// name: 'returnRelatedQuestions',
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// type: 'boolean',
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// optional: true,
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// additionalParams: true,
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// description: 'Whether the online model should return related questions'
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// },
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// {
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// label: 'Search Recency Filter',
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// name: 'searchRecencyFilter',
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// type: 'options',
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// options: [
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// { label: 'Not Set', name: '' },
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// { label: 'Month', name: 'month' },
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// { label: 'Week', name: 'week' },
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// { label: 'Day', name: 'day' },
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// { label: 'Hour', name: 'hour' }
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// ],
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// default: '',
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// optional: true,
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// additionalParams: true,
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// description: 'Filter search results by time interval (does not apply to images)'
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// },
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{
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label: 'Proxy Url',
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name: 'proxyUrl',
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type: 'string',
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optional: true,
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additionalParams: true
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}
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// LangchainJS currently does not has a web_search_options, search_after_date_filter or search_before_date_filter parameter.
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// To add web_search_options (user_location, search_context_size) and search_after_date_filter, search_before_date_filter as a modelKwargs parameter.
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]
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}
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//@ts-ignore
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loadMethods = {
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async listModels(): Promise<INodeOptionsValue[]> {
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return await getModels(MODEL_TYPE.CHAT, 'chatPerplexity')
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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 model = nodeData.inputs?.model as string
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const temperature = nodeData.inputs?.temperature as string
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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 topK = nodeData.inputs?.topK as string
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const presencePenalty = nodeData.inputs?.presencePenalty as string
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const frequencyPenalty = nodeData.inputs?.frequencyPenalty as string
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const streaming = nodeData.inputs?.streaming as boolean
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const timeout = nodeData.inputs?.timeout as string
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const searchDomainFilterRaw = nodeData.inputs?.searchDomainFilter
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const returnImages = nodeData.inputs?.returnImages as boolean
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const returnRelatedQuestions = nodeData.inputs?.returnRelatedQuestions as boolean
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const searchRecencyFilter = nodeData.inputs?.searchRecencyFilter as string
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const proxyUrl = nodeData.inputs?.proxyUrl as string
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const cache = nodeData.inputs?.cache as BaseCache
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if (nodeData.inputs?.credentialId) {
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nodeData.credential = nodeData.inputs?.credentialId
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}
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const credentialData = await getCredentialData(nodeData.credential ?? '', options)
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const apiKey = getCredentialParam('perplexityApiKey', credentialData, nodeData)
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if (!apiKey) {
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throw new Error('Perplexity API Key missing from credential')
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}
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const obj: PerplexityChatInput = {
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model,
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apiKey,
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streaming: streaming ?? true
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}
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if (temperature) obj.temperature = parseFloat(temperature)
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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 (topK) obj.topK = parseInt(topK, 10)
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if (presencePenalty) obj.presencePenalty = parseFloat(presencePenalty)
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if (frequencyPenalty) obj.frequencyPenalty = parseFloat(frequencyPenalty)
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if (timeout) obj.timeout = parseInt(timeout, 10)
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if (returnImages) obj.returnImages = returnImages
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if (returnRelatedQuestions) obj.returnRelatedQuestions = returnRelatedQuestions
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if (searchRecencyFilter && searchRecencyFilter !== '') obj.searchRecencyFilter = searchRecencyFilter
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if (cache) obj.cache = cache
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if (searchDomainFilterRaw) {
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try {
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obj.searchDomainFilter =
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typeof searchDomainFilterRaw === 'object' ? searchDomainFilterRaw : JSON.parse(searchDomainFilterRaw)
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} catch (exception) {
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throw new Error('Invalid JSON in Search Domain Filter: ' + exception)
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}
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}
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if (proxyUrl) {
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console.warn('Proxy configuration for ChatPerplexity might require adjustments to FlowiseChatPerplexity wrapper.')
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}
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const perplexityModel = new ChatPerplexity(nodeData.id, obj)
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return perplexityModel
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}
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}
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module.exports = { nodeClass: ChatPerplexity_ChatModels }
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