Add Post class

1 files changed, 70 insertions, 0 deletions

diff --git a/lib/Post.ts b/lib/Post.ts
new file mode 100644
index 0000000..27a6cb9
--- /dev/null
+++ b/lib/Post.ts
@@ -0,0 +1,70 @@
+import * as fs from 'fs';
+import { JSDOM } from 'jsdom';
+
+const frontmatter = require('front-matter');
+const md = require('markdown-it')();
+
+import { dateToPath, dateToString } from './utils';
+import { Date, FrontMatterObject, PostApiEntry, Meta } from './interfaces';
+
+export default class Post {
+  date: Date;
+  fileTitle: string;
+  fileContent: string;
+  post: FrontMatterObject;
+
+  constructor(filePath: string) {
+    let [year, month, day, title] = filePath.split('/').splice(-4, 4);
+    this.fileTitle = title.substr(0, title.lastIndexOf('.'));
+    this.date = { year, month, day };
+    this.fileContent = fs.readFileSync(filePath, 'utf-8');
+    this.post = frontmatter(this.fileContent);
+  }
+
+  toApi(): PostApiEntry {
+    const { author, title, additionalMeta } = this.getMeta();
+    const { description, html } = this.getPostContent();
+    return {
+      date: dateToString(this.date),
+      author,
+      title,
+      path: `/kronika/${dateToPath(this.date)}/${this.fileTitle}`,
+      description,
+      meta: additionalMeta,
+      content: html,
+    };
+  }
+
+  getMeta(): Meta {
+    const { attributes } = this.post;
+    const author: string = attributes.author;
+    delete attributes.author;
+    const title: string = attributes.title;
+    delete attributes.title;
+    return {
+      author,
+      title,
+      additionalMeta: attributes,
+    };
+  }
+
+  getPostContent() {
+    const { body } = this.post;
+    const html = `<div>${md.render(body)}</div>`;
+    const description = this.getDescription(html);
+
+    return {
+      html,
+      description,
+    };
+  }
+
+  getDescription(html: string): string {
+    const { document } = new JSDOM(`<div>${html}</div>`).window;
+    const elements = document.getElementsByTagName('p');
+
+    const description = elements[1].textContent;
+
+    return description || '';
+  }
+}