's'

lib/content/config.ts

@@ -0,0 +1,31 @@
+/**
+ * 共享内容模块配置 - 可标准应用到 digital / nomadvip / nomadlms
+ */
+
+export type EbookConfig = {
+  title: string;
+  backHref: string;
+  /** 是否需权限，免费则 false */
+  requireAuth?: boolean;
+  /** 预计阅读分钟数，用于倒计时/展示 */
+  estimatedMinutes?: number;
+  /** 存储 key 前缀，区分项目 */
+  storagePrefix?: string;
+};
+
+export type CourseConfig = {
+  courseId: string;
+  courseHomeHref: string;
+  payHref: string;
+  /** 试看：[[moduleIndex, lessonIndex], ...] 或 (m,l)=>boolean */
+  freeTrial?: [number, number][] | ((m: number, l: number) => boolean);
+  /** 视频进度存储前缀 */
+  videoStoragePrefix?: string;
+  /** 学习进度存储前缀 */
+  learningStoragePrefix?: string;
+};
+
+export type ContentConfig = {
+  ebook: EbookConfig;
+  course: CourseConfig;
+};

lib/content/course-utils.ts

@@ -0,0 +1,26 @@
+/**
+ * 课程工具 - 获取上一节/下一节
+ */
+
+export type LessonRef = { moduleIndex: number; lessonIndex: number };
+
+export function getPrevNextLesson(
+  modules: readonly { lessons: readonly unknown[] }[],
+  moduleIndex: number,
+  lessonIndex: number
+): { prev: LessonRef | null; next: LessonRef | null } {
+  const allLessons: LessonRef[] = [];
+  modules.forEach((m, mi) => {
+    m.lessons.forEach((_, li) => {
+      allLessons.push({ moduleIndex: mi, lessonIndex: li });
+    });
+  });
+
+  const idx = allLessons.findIndex((l) => l.moduleIndex === moduleIndex && l.lessonIndex === lessonIndex);
+  if (idx < 0) return { prev: null, next: null };
+
+  return {
+    prev: idx > 0 ? allLessons[idx - 1] : null,
+    next: idx < allLessons.length - 1 ? allLessons[idx + 1] : null,
+  };
+}

lib/content/ebook.ts

@@ -0,0 +1,51 @@
+/**
+ * 电子书 Markdown 解析 - 共享模块
+ */
+import { marked } from "marked";
+
+export interface EbookChunk {
+  html: string;
+  estimatedHeight: number;
+}
+
+export interface EbookData {
+  chunks: EbookChunk[];
+  headers: string[];
+}
+
+export function parseEbookMarkdown(source: string): EbookData {
+  const html = marked.parse(source, { breaks: true, gfm: true }) as string;
+  const lazyHtml = html.replace(/<img /g, '<img loading="lazy" decoding="async" ');
+
+  let rawChunks = lazyHtml.split(/(?=<h1[\s>])/i).filter((c) => c.trim());
+  if (rawChunks.length <= 1) {
+    rawChunks = lazyHtml.split(/(?=<h2[\s>])/i).filter((c) => c.trim());
+  }
+
+  const headers: string[] = [];
+  const headerRegex = /<h1[^>]*>(.*?)<\/h1>/gi;
+  let m;
+  while ((m = headerRegex.exec(lazyHtml)) !== null) {
+    headers.push(m[1].replace(/<[^>]+>/g, ""));
+  }
+  if (headers.length === 0) {
+    const h2Regex = /<h2[^>]*>(.*?)<\/h2>/gi;
+    while ((m = h2Regex.exec(lazyHtml)) !== null) {
+      headers.push(m[1].replace(/<[^>]+>/g, ""));
+    }
+  }
+
+  const chunks: EbookChunk[] = rawChunks.map((chunkHtml) => {
+    const imgCount = (chunkHtml.match(/<img\b/g) || []).length;
+    const textLen = chunkHtml.replace(/<[^>]+>/g, "").length;
+    const estimatedHeight = Math.max(300, Math.round(textLen * 0.6 + imgCount * 350));
+    return { html: chunkHtml, estimatedHeight };
+  });
+
+  return { chunks, headers };
+}
+
+/** 估算阅读时间（字/分钟，中文约 300-500） */
+export function estimateReadingMinutes(textLength: number, wpm = 400): number {
+  return Math.max(1, Math.ceil(textLength / wpm));
+}