alighasami
3d5eaf9445
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36 lines
1.2 KiB
TypeScript
36 lines
1.2 KiB
TypeScript
import type { BaseChatMemory } from '@langchain/classic/memory';
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import type { BaseChatMessageHistory } from '@langchain/core/chat_history';
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import type { BaseChatModel } from '@langchain/core/language_models/chat_models';
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import type { BaseLLM } from '@langchain/core/language_models/llms';
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import type { Tool } from '@langchain/core/tools';
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function hasMethods<T>(obj: unknown, ...methodNames: Array<string | symbol>): obj is T {
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return methodNames.every(
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(methodName) =>
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typeof obj === 'object' &&
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obj !== null &&
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methodName in obj &&
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typeof (obj as Record<string | symbol, unknown>)[methodName] === 'function',
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);
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}
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export function isBaseChatMemory(obj: unknown) {
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return hasMethods<BaseChatMemory>(obj, 'loadMemoryVariables', 'saveContext');
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}
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export function isBaseChatMessageHistory(obj: unknown) {
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return hasMethods<BaseChatMessageHistory>(obj, 'getMessages', 'addMessage');
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}
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export function isChatInstance(model: unknown): model is BaseChatModel {
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const namespace = (model as BaseLLM)?.lc_namespace ?? [];
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return namespace.includes('chat_models');
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}
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export function isToolsInstance(model: unknown): model is Tool {
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const namespace = (model as Tool)?.lc_namespace ?? [];
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return namespace.includes('tools');
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}
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