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Feature/Add prepend messages to memory (#2410)

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add prepend messages to memory
This commit is contained in:
Henry Heng
2024-05-20 17:08:34 +01:00
committed by GitHub
parent 816436f8fa
commit 8caca472ba
27 changed files with 219 additions and 55 deletions
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packages/components/nodes/memory/RedisBackedChatMemory/RedisBackedChatMemory.ts
+15 -2
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@@ -4,7 +4,13 @@ import { BufferMemory, BufferMemoryInput } from 'langchain/memory'
import { RedisChatMessageHistory, RedisChatMessageHistoryInput } from '@langchain/community/stores/message/ioredis'
import { mapStoredMessageToChatMessage, BaseMessage, AIMessage, HumanMessage } from '@langchain/core/messages'
import { INode, INodeData, INodeParams, ICommonObject, MessageType, IMessage, MemoryMethods, FlowiseMemory } from '../../../src/Interface'
import { convertBaseMessagetoIMessage, getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
import {
convertBaseMessagetoIMessage,
getBaseClasses,
getCredentialData,
getCredentialParam,
mapChatMessageToBaseMessage
} from '../../../src/utils'
let redisClientSingleton: Redis
let redisClientOption: RedisOptions
@@ -190,13 +196,20 @@ class BufferMemoryExtended extends FlowiseMemory implements MemoryMethods {
this.sessionTTL = fields.sessionTTL
}
async getChatMessages(overrideSessionId = '', returnBaseMessages = false): Promise<IMessage[] | BaseMessage[]> {
async getChatMessages(
overrideSessionId = '',
returnBaseMessages = false,
prependMessages?: IMessage[]
): Promise<IMessage[] | BaseMessage[]> {
if (!this.redisClient) return []
const id = overrideSessionId ? overrideSessionId : this.sessionId
const rawStoredMessages = await this.redisClient.lrange(id, this.windowSize ? this.windowSize * -1 : 0, -1)
const orderedMessages = rawStoredMessages.reverse().map((message) => JSON.parse(message))
const baseMessages = orderedMessages.map(mapStoredMessageToChatMessage)
if (prependMessages?.length) {
baseMessages.unshift(...mapChatMessageToBaseMessage(prependMessages))
}
return returnBaseMessages ? baseMessages : convertBaseMessagetoIMessage(baseMessages)
}