From 8c34d810af95fae0ef846f54370a8c88bfab7123 Mon Sep 17 00:00:00 2001
From: "netop://ウィビ" <paul@webb.page>
Date: Sat, 11 Apr 2026 14:24:49 -0700
Subject: initial commit

---
 src/utility/feed/atom.ts   | 87 ++++++++++++++++++++++++++++++++++++++++++++++
 src/utility/feed/helper.ts | 67 +++++++++++++++++++++++++++++++++++
 src/utility/feed/index.ts  | 12 +++++++
 src/utility/feed/json.ts   | 41 ++++++++++++++++++++++
 src/utility/feed/rss.ts    | 85 ++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 292 insertions(+)
 create mode 100644 src/utility/feed/atom.ts
 create mode 100644 src/utility/feed/helper.ts
 create mode 100644 src/utility/feed/index.ts
 create mode 100644 src/utility/feed/json.ts
 create mode 100644 src/utility/feed/rss.ts

(limited to 'src/utility/feed')

diff --git a/src/utility/feed/atom.ts b/src/utility/feed/atom.ts
new file mode 100644
index 0000000..d8827e9
--- /dev/null
+++ b/src/utility/feed/atom.ts
@@ -0,0 +1,87 @@
+
+
+
+/*** UTILITY ------------------------------------------ ***/
+
+import { BaseFeed, escapeXML, type FeedOptions } from "./helper.ts";
+
+interface AtomEntry {
+  content?: {
+    body: string;
+    type?: string;
+  };
+  id: string;
+  image?: string;
+  link: string;
+  summary: string;
+  title: string;
+  updated?: Date;
+}
+
+/*** EXPORT ------------------------------------------- ***/
+
+export class FeedAtom extends BaseFeed<AtomEntry> {
+  constructor(options: FeedOptions) {
+    super(options);
+  }
+
+  build(): string {
+    const xmlParts: string[] = [
+      `<?xml version="1.0" encoding="UTF-8"?>\n`,
+      `<feed xmlns="http://www.w3.org/2005/Atom">\n`,
+      `  <title>${escapeXML(this.options.title)}</title>\n`,
+      `  <subtitle>${escapeXML(this.options.description)}</subtitle>\n`,
+      `  <link rel="alternate" href="${escapeXML(this.options.link)}"/>\n`,
+      `  <link rel="self" href="${escapeXML(this.options.link)}"/>\n`,
+      `  <updated>${this.options.updated?.toISOString()}</updated>\n`,
+      `  <generator>${this.options.generator || "the webb blog"}</generator>\n`,
+      `  <id>${escapeXML(this.options.link)}</id>\n`
+    ];
+
+    for (const author of this.options.authors) {
+      xmlParts.push(`  <author>\n`);
+
+      if (author.name)
+        xmlParts.push(`    <name>${escapeXML(author.name)}</name>\n`);
+
+      if (author.email)
+        xmlParts.push(`    <email>${escapeXML(author.email)}</email>\n`);
+
+      if (author.link)
+        xmlParts.push(`    <uri>${escapeXML(author.link)}</uri>\n`);
+
+      xmlParts.push(`  </author>\n`);
+    }
+
+    if (this.options.icon) {
+      xmlParts.push(`  <icon>${escapeXML(this.options.icon)}</icon>\n`);
+      xmlParts.push(`  <logo>${escapeXML(this.options.icon)}</logo>\n`);
+    }
+
+    if (this.options.feed)
+      xmlParts.push(`  <link rel="self" href="${escapeXML(this.options.feed)}"/>\n`);
+
+    for (const entry of this.items) {
+      xmlParts.push(
+        `  <entry>\n`,
+        `    <title type="html">${escapeXML(entry.title)}</title>\n`,
+        `    <link href="${escapeXML(entry.link)}"/>\n`,
+        `    <id>${escapeXML(entry.id)}</id>\n`,
+        `    <updated>${entry.updated?.toISOString() || new Date().toISOString()}</updated>\n`,
+        `    <summary type="html">${escapeXML(entry.summary)}</summary>\n`,
+        `    <content type="${entry.content?.type || "html"}">${escapeXML(entry.content?.body || entry.summary)}</content>\n`,
+        entry.image ?
+          `    <media:thumbnail url="${escapeXML(entry.image)}" />\n` :
+          "",
+        `  </entry>\n`
+      );
+    }
+
+    for (const category of this.categories) {
+      xmlParts.push(`  <category term="${escapeXML(category)}"/>\n`);
+    }
+
+    xmlParts.push("</feed>");
+    return xmlParts.join("");
+  }
+}
diff --git a/src/utility/feed/helper.ts b/src/utility/feed/helper.ts
new file mode 100644
index 0000000..0177364
--- /dev/null
+++ b/src/utility/feed/helper.ts
@@ -0,0 +1,67 @@
+
+
+
+/*** EXPORT ------------------------------------------- ***/
+
+export interface FeedOptions {
+  authors: Array<{
+    name: string;
+    email?: string;
+    link?: string;
+  }>;
+  copyright?: string;
+  description: string;
+  feed?: string;
+  feedLinks?: {
+    atom?: string;
+  };
+  generator?: string;
+  icon?: string;
+  id?: string;
+  language?: string;
+  link: string;
+  title: string;
+  updated?: Date;
+}
+
+export function escapeXML(unsafe: string): string {
+  const escapeMap: { [key: string]: string } = {
+    "<": "&lt;",
+    ">": "&gt;",
+    "&": "&amp;",
+    "'": "&apos;",
+    '"': "&quot;"
+  };
+
+  return unsafe.replace(/[<>&'"]/g, (c) => escapeMap[c] || c);
+}
+
+export abstract class BaseFeed<T> {
+  protected categories: Set<string>;
+  protected items: Array<T>;
+  protected options: FeedOptions;
+
+  constructor(options: FeedOptions) {
+    this.categories = new Set();
+    this.items = [];
+
+    this.options = {
+      ...options,
+      updated: options.updated || new Date()
+    };
+  }
+
+  abstract build(): string;
+
+  addCategory(category: string) {
+    this.categories.add(category);
+  }
+
+  addContributor(contributor: { name: string; email: string; link?: string }) {
+    this.options.authors.push(contributor);
+  }
+
+  addItem(item: T) {
+    this.items.push(item);
+  }
+}
diff --git a/src/utility/feed/index.ts b/src/utility/feed/index.ts
new file mode 100644
index 0000000..d58609a
--- /dev/null
+++ b/src/utility/feed/index.ts
@@ -0,0 +1,12 @@
+
+
+
+/*** EXPORT ------------------------------------------- ***/
+
+export { FeedAtom as ATOM } from "./atom.ts";
+export { FeedJSON as JSON } from "./json.ts";
+export { FeedRSS as RSS } from "./rss.ts";
+
+
+
+/*** forked from https://github.com/GabsEdits/feed ***/
diff --git a/src/utility/feed/json.ts b/src/utility/feed/json.ts
new file mode 100644
index 0000000..589aeae
--- /dev/null
+++ b/src/utility/feed/json.ts
@@ -0,0 +1,41 @@
+
+
+
+/*** UTILITY ------------------------------------------ ***/
+
+import { BaseFeed, type FeedOptions } from "./helper.ts";
+
+interface JsonItem {
+  content_html?: string;
+  date_published?: Date;
+  id: string;
+  title: string;
+  url: string;
+}
+
+/*** EXPORT ------------------------------------------- ***/
+
+export class FeedJSON extends BaseFeed<JsonItem> {
+  constructor(options: FeedOptions) {
+    super(options);
+  }
+
+  build(): string {
+    const json: Record<string, unknown> = {
+      feed_url: this.options.feed,
+      home_page_url: this.options.link,
+      icon: this.options.icon,
+      items: this.items.map(({ content_html, date_published, id, title, url }) => ({
+        ...(content_html && { content_html }),
+        date_published: date_published?.toISOString() || new Date().toUTCString,
+        id,
+        title,
+        url
+      })),
+      title: this.options.title,
+      version: "https://jsonfeed.org/version/1"
+    };
+
+    return JSON.stringify(json, null, 2);
+  }
+}
diff --git a/src/utility/feed/rss.ts b/src/utility/feed/rss.ts
new file mode 100644
index 0000000..c3971bb
--- /dev/null
+++ b/src/utility/feed/rss.ts
@@ -0,0 +1,85 @@
+
+
+
+/*** UTILITY ------------------------------------------ ***/
+
+import { BaseFeed, escapeXML, type FeedOptions } from "./helper.ts";
+
+interface RssItem {
+  content: {
+    body: string;
+  };
+  description: string;
+  id: string;
+  image?: string;
+  link: string;
+  title: string;
+  updated?: Date;
+}
+
+/*** EXPORT ------------------------------------------- ***/
+
+export class FeedRSS extends BaseFeed<RssItem> {
+  constructor(options: FeedOptions) {
+    super(options);
+  }
+
+  build(): string {
+    const xmlParts: string[] = [
+      `<?xml version="1.0" encoding="UTF-8"?>\n`,
+      `<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:wfw="http://wellformedweb.org/CommentAPI/">\n`,
+      `  <channel>\n`,
+      `    <title><![CDATA[${escapeXML(this.options.title)}]]></title>\n`,
+      `    <description><![CDATA[${escapeXML(this.options.description)}]]></description>\n`,
+      `    <link>${escapeXML(this.options.link)}</link>\n`,
+      `    <lastBuildDate>${this.options.updated?.toUTCString()}</lastBuildDate>\n`,
+      `    <language>${this.options.language || "en-US"}</language>\n`,
+      `    <generator>${escapeXML(this.options.generator || "the webb blog")}</generator>\n`,
+      `    <atom:link href="${escapeXML(this.options.link)}" rel="self" type="application/rss+xml"/>\n`
+    ];
+
+    if (this.options.authors.length > 0) {
+      const authorXml = this.options.authors.map((author) => {
+        const escapedEmail = author.email ? escapeXML(author.email) : "";
+        const escapedName = author.name ? escapeXML(author.name) : "";
+        const emailPart = escapedEmail ? `${escapedEmail} ` : "";
+
+        return (
+          `    <webMaster>${emailPart}(${escapedName})</webMaster>\n` +
+          `    <managingEditor>${emailPart}(${escapedName})</managingEditor>\n`
+        );
+      }).join("");
+
+      xmlParts.push(authorXml);
+    }
+
+    if (this.items.length > 0) {
+      const itemsXml = this.items.map((item) => {
+        const contentXml = item.content ?
+          `      <content:encoded><![CDATA[${escapeXML(item.content.body)}]]></content:encoded>\n` :
+          "";
+
+        const imageXml = item.image ?
+          `      <media:thumbnail url="${escapeXML(item.image)}" />\n` :
+          "";
+
+        return (
+          `    <item>\n` +
+          `      <title>${escapeXML(item.title)}</title>\n` +
+          `      <link>${escapeXML(item.link)}</link>\n` +
+          `      <guid>${escapeXML(item.id)}</guid>\n` +
+          `      <pubDate>${item.updated?.toUTCString() || new Date().toUTCString()}</pubDate>\n` +
+          `      <description>${escapeXML(item.description)}</description>\n` +
+          contentXml +
+          imageXml +
+          `    </item>\n`
+        );
+      }).join("");
+
+      xmlParts.push(itemsXml);
+    }
+
+    xmlParts.push(`  </channel>\n`, `</rss>`);
+    return xmlParts.join("");
+  }
+}
-- 
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