89 lines
2.8 KiB
TypeScript
89 lines
2.8 KiB
TypeScript
"use client";
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import {
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type Dispatch,
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type ReactNode,
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createContext,
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useContext,
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useMemo,
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} from "react";
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import { useMachine } from "@xstate/react";
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import { chatMachine } from "./chat-machine";
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import type { ChatEvent, ChatState as MachineContext } from "./chat-machine";
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/**
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* 对外暴露的 State 形状
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*
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* isGuest 字段已删 —— 由 chat-screen 派生自 `auth.loginStatus === "guest"`。
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* 消费方（chat-screen）通过 `useAuthState()` 取 loginStatus，本地派生 isGuest。
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*/
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interface ChatState {
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messages: MachineContext["messages"];
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isReplyingAI: boolean;
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upgradePromptVisible: boolean;
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upgradeReason: MachineContext["upgradeReason"];
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upgradeHint: MachineContext["upgradeHint"];
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upgradeDetail: MachineContext["upgradeDetail"];
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isLoadingMore: boolean;
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hasMore: boolean;
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historyOffset: number;
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/** history 初始加载完成标志（local → network → save 跑完） —— UI 可用此显示 loading */
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historyLoaded: boolean;
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unlockHistoryPromptVisible: boolean;
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lockedHistoryCount: number;
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isUnlockingHistory: boolean;
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unlockHistoryError: string | null;
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}
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const ChatStateCtx = createContext<ChatState | null>(null);
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const ChatDispatchCtx = createContext<Dispatch<ChatEvent> | null>(null);
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export interface ChatProviderProps {
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children: ReactNode;
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}
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export function ChatProvider({ children }: ChatProviderProps) {
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const [state, send] = useMachine(chatMachine, {});
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// 映射 XState 状态机快照 → 原 ChatState 形状
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const chatState = useMemo<ChatState>(
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() => ({
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messages: state.context.messages,
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isReplyingAI: state.context.isReplyingAI,
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upgradePromptVisible: state.context.upgradePromptVisible,
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upgradeReason: state.context.upgradeReason,
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upgradeHint: state.context.upgradeHint,
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upgradeDetail: state.context.upgradeDetail,
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isLoadingMore: state.context.isLoadingMore,
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hasMore: state.context.hasMore,
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historyOffset: state.context.historyOffset,
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historyLoaded: state.context.historyLoaded,
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unlockHistoryPromptVisible: state.context.unlockHistoryPromptVisible,
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lockedHistoryCount: state.context.lockedHistoryCount,
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isUnlockingHistory: state.context.isUnlockingHistory,
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unlockHistoryError: state.context.unlockHistoryError,
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}),
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[state],
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);
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return (
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<ChatStateCtx.Provider value={chatState}>
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<ChatDispatchCtx.Provider value={send}>{children}</ChatDispatchCtx.Provider>
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</ChatStateCtx.Provider>
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);
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}
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export function useChatState(): ChatState {
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const ctx = useContext(ChatStateCtx);
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if (!ctx) throw new Error("useChatState must be used inside <ChatProvider>");
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return ctx;
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}
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export function useChatDispatch(): Dispatch<ChatEvent> {
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const ctx = useContext(ChatDispatchCtx);
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if (!ctx)
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throw new Error("useChatDispatch must be used inside <ChatProvider>");
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return ctx;
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}
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