Add script to convert tech talks

.gitignore

@@ -4,3 +4,4 @@
 /scripts/mdx-scripts/node_modules
 /scripts/mdx-scripts/markdown-events
 /scripts/mdx-scripts/markdown-news
+/scripts/mdx-scripts/markdown-talks

scripts/mdx-scripts/talk-conversion.js

@@ -0,0 +1,107 @@
+const fs = require("fs");
+const jsdom = require("jsdom");
+const { JSDOM } = jsdom;
+const { window } = new JSDOM("");
+global.window = window;
+var showdown = require("showdown");
+const converter = new showdown.Converter();
+const libxmljs = require("libxmljs");
+
+const MIRROR_URL = "http://mirror.csclub.uwaterloo.ca/csclub/";
+
+try {
+  fs.mkdirSync("./markdown-talks/");
+} catch (e) {
+  if (e.code !== "EEXIST") {
+    throw e;
+  }
+}
+
+const file = fs
+  .readFileSync("../../media/index.xml", "utf8")
+  .replace(/<!DOCTYPE.*>/, "");
+
+const xml = libxmljs.parseHtml(file);
+const talks = xml.find("//mediaitem");
+
+talks.forEach((talk, idx) => {
+  const { filename, markdown } = xml2md(talk, idx);
+
+  fs.promises.writeFile(`./markdown-talks/${filename}.md`, markdown);
+});
+
+/**
+ *
+ * @param {libxmljs.Element} talk
+ */
+function xml2md(talk, index) {
+  const title = talk.attr("title").value();
+
+  const abstract = talk
+    .get("abstract")
+    ?.childNodes()
+    .reduce((str, node) => str + node.toString(), "")
+    .trim();
+
+  const presentors = talk
+    .get("presentor")
+    .childNodes()
+    .toString()
+    .split(",")
+    .map((s) => s.trim());
+
+  const thumbSmall = MIRROR_URL + talk.get("thumbnail").attr("file").value();
+  const thumbLarge = thumbSmall.replace("-thumb-small", "-thumb-large");
+
+  const links = talk
+    .find("mediafile")
+    .map((mf) => ({
+      /** @type{string} */
+      file: MIRROR_URL + mf.attr("file").value(),
+
+      /** @type{string} */
+      type: mf.attr("type").value(),
+
+      /** @type{string | undefined} */
+      size: mf.attr("size")?.value() ?? undefined,
+    }))
+    .map(
+      ({ file, type, size }) =>
+        "  " +
+        `
+  - file: '${file.replaceAll("'", "''")}'
+    type: '${type.replaceAll("'", "''")}'
+    ${size == null ? "" : `size: '${size.replaceAll("'", "''")}'`}
+`.trim(),
+    );
+
+  const markdown =
+    `
+---
+index: ${index}
+title: '${title.replaceAll("'", "''")}'
+presentors:
+  - '${presentors.join("\n  - ").replaceAll("'", "''")}'
+thumbnails:
+  small: '${thumbSmall}'
+  large: '${thumbLarge}'
+links:
+${links.join("\n")}
+---
+
+${converter.makeMarkdown(abstract ?? "")}
+`.trim() + "\n";
+
+  return {
+    filename: title
+      .toLowerCase()
+      .replaceAll(" ", "-")
+      .replaceAll(":", "")
+      .replaceAll("=", "")
+      .replaceAll(",", "-")
+      .replaceAll("'", "-")
+      .replaceAll("+", "-plus-")
+      .replaceAll(/-+/g, "-"),
+    markdown,
+  };
+}