142 lines
4.2 KiB
TypeScript
142 lines
4.2 KiB
TypeScript
/**
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* 学习进度、继续学习、收藏、笔记 - localStorage
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*/
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const PREFIX = "lms-";
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const KEY_LAST = `${PREFIX}last`;
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const KEY_COMPLETED = `${PREFIX}completed`;
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const KEY_BOOKMARKS = `${PREFIX}bookmarks`;
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const KEY_NOTES = `${PREFIX}notes`;
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const KEY_RATING = `${PREFIX}rating`;
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export type LastWatched = { moduleIndex: number; lessonIndex: number; name: string };
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export function getLastWatched(): LastWatched | null {
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if (typeof window === "undefined") return null;
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try {
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const raw = localStorage.getItem(KEY_LAST);
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if (!raw) return null;
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const d = JSON.parse(raw);
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if (typeof d?.moduleIndex !== "number" || typeof d?.lessonIndex !== "number") return null;
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return { moduleIndex: d.moduleIndex, lessonIndex: d.lessonIndex, name: d.name || "" };
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} catch {
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return null;
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}
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}
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export function setLastWatched(m: number, l: number, name: string): void {
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if (typeof window === "undefined") return;
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try {
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localStorage.setItem(KEY_LAST, JSON.stringify({ moduleIndex: m, lessonIndex: l, name }));
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} catch {
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/* ignore */
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}
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}
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export function getCompletedLessons(): Set<string> {
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if (typeof window === "undefined") return new Set();
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try {
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const raw = localStorage.getItem(KEY_COMPLETED);
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if (!raw) return new Set();
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const arr = JSON.parse(raw);
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return new Set(Array.isArray(arr) ? arr : []);
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} catch {
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return new Set();
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}
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}
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export function markCompleted(moduleIndex: number, lessonIndex: number): void {
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if (typeof window === "undefined") return;
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try {
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const set = getCompletedLessons();
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set.add(`${moduleIndex}-${lessonIndex}`);
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localStorage.setItem(KEY_COMPLETED, JSON.stringify([...set]));
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window.dispatchEvent(new CustomEvent("learning:progress"));
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} catch {
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/* ignore */
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}
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}
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export function getProgress(totalLessons: number): { completed: number; percent: number } {
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const set = getCompletedLessons();
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const completed = set.size;
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return { completed, percent: totalLessons > 0 ? Math.round((completed / totalLessons) * 100) : 0 };
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}
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export function getBookmarks(): Set<string> {
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if (typeof window === "undefined") return new Set();
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try {
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const raw = localStorage.getItem(KEY_BOOKMARKS);
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if (!raw) return new Set();
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const arr = JSON.parse(raw);
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return new Set(Array.isArray(arr) ? arr : []);
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} catch {
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return new Set();
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}
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}
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export function toggleBookmark(moduleIndex: number, lessonIndex: number): boolean {
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if (typeof window === "undefined") return false;
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try {
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const set = getBookmarks();
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const key = `${moduleIndex}-${lessonIndex}`;
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if (set.has(key)) set.delete(key);
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else set.add(key);
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localStorage.setItem(KEY_BOOKMARKS, JSON.stringify([...set]));
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window.dispatchEvent(new CustomEvent("learning:bookmarks"));
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return set.has(key);
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} catch {
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return false;
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}
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}
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export function isBookmarked(moduleIndex: number, lessonIndex: number): boolean {
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return getBookmarks().has(`${moduleIndex}-${lessonIndex}`);
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}
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export function getNote(moduleIndex: number, lessonIndex: number): string {
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if (typeof window === "undefined") return "";
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try {
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const raw = localStorage.getItem(KEY_NOTES);
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if (!raw) return "";
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const map = JSON.parse(raw);
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return map[`${moduleIndex}-${lessonIndex}`] ?? "";
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} catch {
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return "";
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}
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}
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export function setNote(moduleIndex: number, lessonIndex: number, text: string): void {
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if (typeof window === "undefined") return;
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try {
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const raw = localStorage.getItem(KEY_NOTES);
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const map = raw ? JSON.parse(raw) : {};
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map[`${moduleIndex}-${lessonIndex}`] = text;
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localStorage.setItem(KEY_NOTES, JSON.stringify(map));
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} catch {
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/* ignore */
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}
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}
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export function getRating(): { stars: number; comment: string } | null {
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if (typeof window === "undefined") return null;
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try {
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const raw = localStorage.getItem(KEY_RATING);
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if (!raw) return null;
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const d = JSON.parse(raw);
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return { stars: d?.stars ?? 0, comment: d?.comment ?? "" };
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} catch {
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return null;
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}
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}
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export function setRating(stars: number, comment: string): void {
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if (typeof window === "undefined") return;
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try {
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localStorage.setItem(KEY_RATING, JSON.stringify({ stars, comment }));
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window.dispatchEvent(new CustomEvent("learning:rating"));
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} catch {
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/* ignore */
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}
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}
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