Add the profile page for users

src/lib/seo.ts

@@ -1,17 +1,38 @@
-// Plain-text excerpt of a markdown body for description meta tags: the first
-// paragraph that isn't a heading or a bare media URL, trimmed to `max` chars.
-export function excerpt(markdown: string, max = 160): string {
-  const lines = markdown.split("\n").map((l) => l.trim());
-  const line = lines.find(
-    (l) => l && !l.startsWith("#") && !/^https?:\/\/\S+$/.test(l),
-  );
-  if (!line) return "";
-  const text = line
+// Markdown inline syntax reduced to plain text.
+function stripInline(text: string): string {
+  return text
     .replace(/!\[[^\]]*\]\([^)]*\)/g, "") // images
     .replace(/\[([^\]]*)\]\([^)]*\)/g, "$1") // links → label
     .replace(/[*_`~]+/g, "")
     .replace(/nostr:([a-z0-9]{12})[a-z0-9]*/g, "@$1…") // keep a short handle
     .replace(/\s+/g, " ")
     .trim();
+}
+
+function truncate(text: string, max: number): string {
   return text.length > max ? text.slice(0, max - 1).trimEnd() + "…" : text;
 }
+
+function isProse(line: string): boolean {
+  return !!line && !line.startsWith("#") && !/^https?:\/\/\S+$/.test(line);
+}
+
+// Plain-text excerpt of a markdown body for description meta tags: the first
+// paragraph that isn't a heading or a bare media URL, trimmed to `max` chars.
+export function excerpt(markdown: string, max = 160): string {
+  const line = markdown
+    .split("\n")
+    .map((l) => l.trim())
+    .find(isProse);
+  return line ? truncate(stripInline(line), max) : "";
+}
+
+// The whole body flattened to one plain-text line, trimmed to `max` chars.
+// Headings, bare media URLs, code fences and block markers are dropped.
+export function summarize(markdown: string, max = 200): string {
+  const lines = markdown
+    .split("\n")
+    .map((l) => l.trim().replace(/^(?:>\s*|[-*+]\s+|\d+[.)]\s+)+/, ""))
+    .filter((l) => isProse(l) && !l.startsWith("```"));
+  return truncate(stripInline(lines.join(" ")), max);
+}