90 lines
2.9 KiB
TypeScript
90 lines
2.9 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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/** 游客剩余配额（次/天）—— 业务展示用，鉴权判断由 chat-screen 派生 loginStatus */
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guestRemainingQuota: number;
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/** 游客总配额 */
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guestTotalQuota: number;
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quotaExceededTrigger: number;
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paywallTriggered: boolean;
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paywallReason: MachineContext["paywallReason"];
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paywallDetail: MachineContext["paywallDetail"];
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isLoadingMore: boolean;
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hasMore: boolean;
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historyOffset: number;
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/** 游客配额加载完成标志（仅 guestSession 期间） —— UI 可用此显示 loading */
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quotaLoaded: boolean;
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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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}
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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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guestRemainingQuota: state.context.guestRemainingQuota,
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guestTotalQuota: state.context.guestTotalQuota,
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quotaExceededTrigger: state.context.quotaExceededTrigger,
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paywallTriggered: state.context.paywallTriggered,
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paywallReason: state.context.paywallReason,
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paywallDetail: state.context.paywallDetail,
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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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quotaLoaded: state.context.quotaLoaded,
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historyLoaded: state.context.historyLoaded,
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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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