142 lines
4.8 KiB
TypeScript
142 lines
4.8 KiB
TypeScript
import { SystemChatMessage } from 'langchain/schema'
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import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses } from '../../../src/utils'
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import { ZepMemory, ZepMemoryInput } from 'langchain/memory/zep'
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import { ICommonObject } from '../../../src'
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class ZepMemory_Memory implements INode {
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label: string
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name: string
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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 = 'Zep Memory'
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this.name = 'ZepMemory'
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this.type = 'ZepMemory'
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this.icon = 'memory.svg'
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this.category = 'Memory'
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this.description = 'Summarizes the conversation and stores the memory in zep server'
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this.baseClasses = [this.type, ...getBaseClasses(ZepMemory)]
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this.inputs = [
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{
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label: 'Base URL',
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name: 'baseURL',
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type: 'string',
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default: 'http://127.0.0.1:8000'
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},
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{
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label: 'Auto Summary',
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name: 'autoSummary',
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type: 'boolean',
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default: true
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},
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{
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label: 'Session Id',
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name: 'sessionId',
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type: 'string',
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description: 'if empty, chatId will be used automatically',
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default: '',
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additionalParams: true,
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optional: true
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},
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{
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label: 'Auto Summary Template',
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name: 'autoSummaryTemplate',
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type: 'string',
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default: 'This is the summary of the following conversation:\n{summary}',
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additionalParams: true
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},
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{
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label: 'AI Prefix',
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name: 'aiPrefix',
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type: 'string',
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default: 'ai',
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additionalParams: true
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},
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{
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label: 'Human Prefix',
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name: 'humanPrefix',
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type: 'string',
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default: 'human',
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additionalParams: true
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},
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{
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label: 'Memory Key',
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name: 'memoryKey',
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type: 'string',
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default: 'chat_history',
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additionalParams: true
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},
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{
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label: 'Input Key',
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name: 'inputKey',
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type: 'string',
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default: 'input',
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additionalParams: true
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},
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{
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label: 'Output Key',
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name: 'outputKey',
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type: 'string',
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default: 'text',
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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 baseURL = nodeData.inputs?.baseURL as string
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const aiPrefix = nodeData.inputs?.aiPrefix as string
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const humanPrefix = nodeData.inputs?.humanPrefix as string
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const memoryKey = nodeData.inputs?.memoryKey as string
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const inputKey = nodeData.inputs?.inputKey as string
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const autoSummaryTemplate = nodeData.inputs?.autoSummaryTemplate as string
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const autoSummary = nodeData.inputs?.autoSummary as boolean
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const sessionId = nodeData.inputs?.sessionId as string
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const chatId = options?.chatId as string
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const obj: ZepMemoryInput = {
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baseURL,
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sessionId: sessionId ? sessionId : chatId,
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aiPrefix,
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humanPrefix,
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returnMessages: true,
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memoryKey,
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inputKey
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}
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let zep = new ZepMemory(obj)
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// hack to support summary
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let tmpFunc = zep.loadMemoryVariables
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zep.loadMemoryVariables = async (values) => {
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let data = await tmpFunc.bind(zep, values)()
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if (autoSummary && zep.returnMessages && data[zep.memoryKey] && data[zep.memoryKey].length) {
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const memory = await zep.zepClient.getMemory(zep.sessionId, 10)
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if (memory?.summary) {
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let summary = autoSummaryTemplate.replace(/{summary}/g, memory.summary.content)
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// eslint-disable-next-line no-console
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console.log('[ZepMemory] auto summary:', summary)
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data[zep.memoryKey].unshift(new SystemChatMessage(summary))
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}
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}
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// for langchain zep memory compatibility, or we will get "Missing value for input variable chat_history"
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if (data instanceof Array) {
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data = {
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[zep.memoryKey]: data
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}
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}
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return data
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}
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return zep
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}
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}
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module.exports = { nodeClass: ZepMemory_Memory }
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