Restructure blogs as Astro monorepo

sites/puzzles/src/blog-sites.js

@@ -0,0 +1,75 @@
+export const BLOG_SITES = [
+  {
+    key: "research",
+    title: "Research",
+    description:
+      "Notes from papers I am reading, and mini-surveys of themes I'm learning about.",
+    url: "https://research.neeldhara.blog",
+  },
+  {
+    key: "vibes",
+    title: "Vibes",
+    description:
+      "Conversations with LLMs with an intent to create something meaningful.",
+    url: "https://vibes.neeldhara.blog",
+  },
+  {
+    key: "puzzles",
+    title: "Puzzles",
+    description:
+      "Problems, puzzles, contest editorials, and mathematical magic.",
+    url: "https://puzzles.neeldhara.blog",
+  },
+  {
+    key: "reflections",
+    title: "Reflections",
+    description: "Random musings, pseudo-advice, how-tos. Core dumped.",
+    url: "https://reflections.neeldhara.blog",
+  },
+  {
+    key: "poetry",
+    title: "Poetry",
+    description: "Failed attempts at organizing thoughts in verse.",
+    url: "https://poetry.neeldhara.blog",
+  },
+  {
+    key: "reviews",
+    title: "Reviews",
+    description:
+      "Reviews of things I use or consume: software, books, hardware, etc.",
+    url: "https://reviews.neeldhara.blog",
+  },
+  {
+    key: "art",
+    title: "Art",
+    description:
+      "This exists so I can stay accountable to my doodling practice :)",
+    url: "https://art.neeldhara.blog",
+  },
+];
+
+export const DEFAULT_BLOG_SITE_KEY = "puzzles";
+export const BLOG_SITE_KEYS = BLOG_SITES.map((site) => site.key);
+
+function getEnvironmentBlogSiteKey() {
+  if (typeof process === "undefined") {
+    return undefined;
+  }
+
+  return process.env?.BLOG_SITE;
+}
+
+export function getBlogSite(key = getEnvironmentBlogSiteKey()) {
+  const normalizedKey = key || DEFAULT_BLOG_SITE_KEY;
+  const site = BLOG_SITES.find((candidate) => candidate.key === normalizedKey);
+
+  if (!site) {
+    throw new Error(
+      `Unknown BLOG_SITE "${normalizedKey}". Expected one of: ${BLOG_SITE_KEYS.join(", ")}`,
+    );
+  }
+
+  return site;
+}
+
+export const ACTIVE_BLOG_SITE = getBlogSite();