142 lines
4.1 KiB
TypeScript
142 lines
4.1 KiB
TypeScript
import { ref } from "vue";
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import { SettingAPI } from "timi-web-api";
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const AI_QUICK_QUESTION_CACHE_KEY = "gao-customer-h5:ai-agent-example";
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const AI_QUICK_QUESTION_CACHE_TTL = 24 * 60 * 60 * 1000;
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const AI_QUICK_QUESTION_COUNT = 5;
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interface AiQuickQuestionCache {
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cachedAt: number;
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questionList: string[];
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}
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/** 从快捷问题题库中随机抽取指定数量的问题。 */
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export function getRandomAiQuickQuestions(count = AI_QUICK_QUESTION_COUNT, questionPool: readonly string[] = []): string[] {
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const result: string[] = [...questionPool];
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const targetCount = Math.min(Math.max(Math.floor(count), 0), result.length);
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for (let index = 0; index < targetCount; index += 1) {
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const randomIndex = index + Math.floor(Math.random() * (result.length - index));
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[result[index], result[randomIndex]] = [result[randomIndex], result[index]];
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}
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return result.slice(0, targetCount);
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}
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/** 清理并去重快捷问题。 */
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function normalizeAiQuickQuestionList(value: unknown): string[] {
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if (!Array.isArray(value)) {
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return [];
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}
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return [...new Set(value.filter((item): item is string => typeof item === "string").map(item => item.trim()).filter(Boolean))];
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}
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/** 将 Setting 中的题库值解析为有效的快捷问题列表。 */
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function parseAiQuickQuestionList(value: unknown): string[] {
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if (typeof value !== "string") {
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return [];
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}
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try {
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return normalizeAiQuickQuestionList(JSON.parse(value));
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} catch {
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return [];
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}
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}
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/** 读取一天内有效的本地题库缓存。 */
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function readAiQuickQuestionCache(): string[] {
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try {
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const cacheValue = localStorage.getItem(AI_QUICK_QUESTION_CACHE_KEY);
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if (!cacheValue) {
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return [];
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}
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const cache: unknown = JSON.parse(cacheValue);
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if (typeof cache !== "object" || cache === null || !("cachedAt" in cache) || !("questionList" in cache)) {
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return [];
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}
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const typedCache = cache as AiQuickQuestionCache;
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if (typeof typedCache.cachedAt !== "number" || !Number.isFinite(typedCache.cachedAt)) {
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return [];
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}
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const cacheAge = Date.now() - typedCache.cachedAt;
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if (cacheAge < 0 || AI_QUICK_QUESTION_CACHE_TTL < cacheAge || !Array.isArray(typedCache.questionList)) {
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return [];
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}
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return normalizeAiQuickQuestionList(typedCache.questionList);
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} catch {
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return [];
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}
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}
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/** 将动态题库缓存到本地一天。 */
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function writeAiQuickQuestionCache(questionList: string[]): void {
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try {
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const cache: AiQuickQuestionCache = {
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cachedAt: Date.now(),
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questionList
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};
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localStorage.setItem(AI_QUICK_QUESTION_CACHE_KEY, JSON.stringify(cache));
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} catch {
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// 本地存储不可用时跳过缓存。
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}
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}
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/** 从系统设置中获取动态快捷问题题库。 */
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async function fetchAiQuickQuestionPool(): Promise<string[]> {
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const settingMap = await SettingAPI.map("GAO_SYSTEM", undefined, ["AI_AGENT_EXAMPLE"]);
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return parseAiQuickQuestionList(settingMap.AI_AGENT_EXAMPLE?.value);
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}
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let loadingPromise: Promise<void> | undefined;
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let currentAiQuickQuestionPool: string[] = [];
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/** 从已加载的题库中重新抽取快捷问题。 */
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export function refreshAiQuickQuestions(): void {
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aiQuickQuestionList.value = getRandomAiQuickQuestions(AI_QUICK_QUESTION_COUNT, currentAiQuickQuestionPool);
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}
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/** 加载动态题库并刷新当前会话展示的问题。 */
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export async function loadAiQuickQuestions(): Promise<void> {
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if (loadingPromise) {
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await loadingPromise;
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return;
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}
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loadingPromise = (async () => {
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const cachedQuestionList = readAiQuickQuestionCache();
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if (cachedQuestionList.length > 0) {
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currentAiQuickQuestionPool = cachedQuestionList;
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refreshAiQuickQuestions();
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return;
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}
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currentAiQuickQuestionPool = [];
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aiQuickQuestionList.value = [];
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try {
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const questionList = await fetchAiQuickQuestionPool();
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if (questionList.length > 0) {
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currentAiQuickQuestionPool = questionList;
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writeAiQuickQuestionCache(questionList);
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refreshAiQuickQuestions();
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}
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} catch {
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// 接口异常时保持为空。
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}
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})();
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try {
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await loadingPromise;
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} finally {
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loadingPromise = undefined;
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}
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}
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/** 当前会话欢迎页展示的快捷问题。 */
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export const aiQuickQuestionList = ref<string[]>([]);
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