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- add new prompt scope - add prompt user - add CHAT Hisotry in prompt
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Joao Paulo Nobrega
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Feb 20, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,39 @@ | ||
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| import { IDatabaseConfig } from '../../interface/agent.interface'; | ||
| import { BaseChatMessageHistory } from 'langchain/schema'; | ||
| import { BaseChatMessageHistory, BaseMessage } from 'langchain/schema'; | ||
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| import RedisChatHistory from './redis-chat-history'; | ||
| import { BufferMemory } from 'langchain/memory'; | ||
| import MemoryChatHistory from './memory-chat-history'; | ||
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| interface IChatHistory { | ||
| addUserMessage(message: string): Promise<void>; | ||
| addAIChatMessage(message: string): Promise<void>; | ||
| getMessages(): Promise<BaseMessage[]>; | ||
| getFormatedMessages(): Promise<string>; | ||
| clear(): Promise<void>; | ||
| getChatHistory(): BaseChatMessageHistory; | ||
| getBufferMemory(): BufferMemory; | ||
| } | ||
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| const Services = { | ||
| redis: RedisChatHistory, | ||
| memory: MemoryChatHistory, | ||
| } as any; | ||
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| class ChatHistoryFactory { | ||
| public static async create(settings: IDatabaseConfig): Promise<BaseChatMessageHistory> { | ||
| return await new Services[settings.type](settings).build(); | ||
| public static async create(settings: IDatabaseConfig): Promise<IChatHistory> { | ||
| const service = new Services[settings?.type](settings); | ||
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| if (!service) { | ||
| return await new MemoryChatHistory(settings).build(); | ||
| } | ||
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| return await service.build(); | ||
| } | ||
| } | ||
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| export default ChatHistoryFactory; | ||
| export { | ||
| IChatHistory, | ||
| ChatHistoryFactory, | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| import { BaseChatMessageHistory, BaseMessage } from 'langchain/schema'; | ||
| import { IDatabaseConfig } from '../../interface/agent.interface'; | ||
| import { IChatHistory } from '.'; | ||
| import { BufferMemory } from 'langchain/memory'; | ||
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| class MemoryChatHistory implements IChatHistory { | ||
| private _settings: IDatabaseConfig; | ||
| private _history: BaseChatMessageHistory; | ||
| private _bufferMemory: BufferMemory; | ||
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| constructor(settings: IDatabaseConfig) { | ||
| this._settings = settings; | ||
| } | ||
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| addUserMessage(message: string): Promise<void> { | ||
| return this._history?.addUserMessage(message); | ||
| } | ||
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| addAIChatMessage(message: string): Promise<void> { | ||
| return this._history?.addAIChatMessage(message); | ||
| } | ||
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| getMessages(): Promise<BaseMessage[]> { | ||
| return this._history?.getMessages(); | ||
| } | ||
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| async getFormatedMessages(): Promise<string> { | ||
| const messages = await this._history?.getMessages(); | ||
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| const cut = messages | ||
| .slice(-(this._settings?.limit || 5)); | ||
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| const formated = cut.map((message) => `${message._getType().toUpperCase()}: ${message.content}`).join('\n'); | ||
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| return formated; | ||
| } | ||
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| getChatHistory(): BaseChatMessageHistory { | ||
| return this._history; | ||
| } | ||
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| getBufferMemory(): BufferMemory { | ||
| return this._bufferMemory; | ||
| } | ||
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| clear(): Promise<void> { | ||
| return this._history?.clear(); | ||
| } | ||
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| async build(): Promise<IChatHistory> { | ||
| const { ChatMessageHistory } = (await import('langchain/stores/message/in_memory')); | ||
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| this._history = new ChatMessageHistory(); | ||
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| this._bufferMemory = new BufferMemory({ | ||
| returnMessages: true, | ||
| memoryKey: 'chat_history', | ||
| chatHistory: this._history, | ||
| }); | ||
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| return this; | ||
| } | ||
| } | ||
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| export default MemoryChatHistory; |
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