feat: implement feed and validation utilities for smartfeed

ts/classes.feed.ts

@@ -0,0 +1,78 @@
+import * as plugins from './smartfeed.plugins.js';
+
+export interface IFeedOptions {
+  domain: string;
+  title: string;
+  description: string;
+  category: string;
+  company: string;
+  companyEmail: string;
+  companyDomain: string;
+}
+
+export interface IFeedItem {
+  title: string;
+  timestamp: number;
+  url: string;
+  authorName: string;
+  imageUrl: string;
+  content: string;
+}
+
+export class Feed {
+  options: IFeedOptions;
+  items: IFeedItem[] = [];
+  constructor(optionsArg: IFeedOptions) {
+    this.options = optionsArg;
+  }
+
+  public addItem(itemArg: IFeedItem) {
+    this.items.push(itemArg);
+  }
+
+  private getFeedObject() {
+    const feed = new plugins.feed.Feed({
+      copyright: `All rights reserved, ${this.options.company}`,
+      id: `https://${this.options.domain}`,
+      link: `https://${this.options.domain}`,
+      title: this.options.title,
+      author: {
+        name: this.options.company,
+        email: this.options.companyEmail,
+        link: this.options.companyEmail,
+      },
+      description: this.options.description,
+      generator: '@pushrocks/smartfeed',
+      language: 'en',
+    });
+
+    feed.addCategory(this.options.category);
+    for (const itemArg of this.items) {
+      feed.addItem({
+        title: itemArg.title,
+        date: new Date(itemArg.timestamp),
+        link: itemArg.url.replace(/&/gm, '&'),
+        image: itemArg.imageUrl.replace(/&/gm, '&'),
+        content: itemArg.content,
+        author: [
+          {
+            name: itemArg.authorName,
+          },
+        ],
+      });
+    }
+    return feed;
+  }
+
+  public exportRssFeedString(): string {
+    return this.getFeedObject().rss2();
+  }
+
+  public exportAtomFeed(): string {
+    return this.getFeedObject().atom1();
+  }
+
+  public exportJsonFeed(): string {
+    return this.getFeedObject().json1();
+  }
+}