feat: Add support for reading articles from files. (#384)

src/article.ts

@@ -1,4 +1,5 @@
 import { marked } from 'marked';
+import { readFileSync } from 'node:fs';
 import sanitizeHTML from 'sanitize-html';
 
 const sanitizerSettings: sanitizeHTML.IOptions = {
@@ -11,14 +12,23 @@ export interface Link {
   title: string;
 }
 
-export interface ArticleConfig {
+interface ArticleBaseConfig {
   title: string;
   author?: string;
   date: Date;
-  content: string;
   published?: boolean;
 }
 
+interface ArticleStringConfig extends ArticleBaseConfig {
+  content: string;
+}
+
+interface ArticleFileConfig extends ArticleBaseConfig {
+  contentFile: string;
+}
+
+export type ArticleConfig = ArticleStringConfig | ArticleFileConfig;
+
 export class Article {
   readonly title: string;
   readonly content: string;
@@ -30,8 +40,9 @@ export class Article {
     this.title = input.title;
     this.author = input.author;
     this.date = input.date.toISOString().split('T')[0];
+    const content = "content" in input ? input.content : readFileSync(input.contentFile).toString();
     this.content = sanitizeHTML(
-      marked.parse(input.content, { async: false }) as string,
+      marked.parse(content, { async: false }) as string,
       sanitizerSettings
     );
     this.published = input.published ?? true;

test/article.test.ts

@@ -24,6 +24,27 @@ await describe('article', async () => {
     equal(article.published, true);
   });
 
+  await test('creates with contentFile', () => {
+    const title = 'test article';
+    const author = 'Bob';
+    const date = new Date('January 1, 2023 12:34:56');
+    const contentFile = 'test/inputs/test.md';
+    const published = true;
+    const article = new Article({
+      title,
+      author,
+      date,
+      contentFile,
+      published,
+    });
+    ok(article instanceof Article);
+    equal(article.title, title);
+    equal(article.author, author);
+    equal(article.date, '2023-01-01');
+    equal(article.content, '<h1>test</h1>\n');
+    equal(article.published, true);
+  });
+
   await test('creates with defaults', () => {
     const title = 'test article';
     const date = new Date('January 1, 2023');

test/inputs/test.md

@@ -0,0 +1 @@
+<h1>test</h1>