Bump to v0.4.0 — Phase 3: image lightbox, bookmarks, discover, language filter, UI polish

src/lib/language.ts

@@ -0,0 +1,71 @@
+// Unicode script detection for feed filtering
+
+const SCRIPT_RANGES: [string, RegExp][] = [
+  ["Latin", /[\u0041-\u024F\u1E00-\u1EFF]/],
+  ["CJK", /[\u2E80-\u2FFF\u3000-\u303F\u3040-\u309F\u30A0-\u30FF\u3400-\u4DBF\u4E00-\u9FFF\uF900-\uFAFF\uFE30-\uFE4F\uFF00-\uFFEF]|[\uD840-\uD87F][\uDC00-\uDFFF]/],
+  ["Cyrillic", /[\u0400-\u04FF\u0500-\u052F]/],
+  ["Arabic", /[\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF]/],
+  ["Devanagari", /[\u0900-\u097F]/],
+  ["Thai", /[\u0E00-\u0E7F]/],
+  ["Korean", /[\uAC00-\uD7AF\u1100-\u11FF]/],
+  ["Hebrew", /[\u0590-\u05FF]/],
+  ["Greek", /[\u0370-\u03FF]/],
+  ["Georgian", /[\u10A0-\u10FF]/],
+  ["Armenian", /[\u0530-\u058F]/],
+];
+
+export function detectScript(text: string): string {
+  // Strip URLs, mentions, hashtags to avoid noise
+  const cleaned = text
+    .replace(/https?:\/\/\S+/g, "")
+    .replace(/nostr:\S+/g, "")
+    .replace(/#\w+/g, "")
+    .trim();
+
+  if (!cleaned) return "Unknown";
+
+  // Count characters per script
+  const counts = new Map<string, number>();
+  for (const char of cleaned) {
+    for (const [name, regex] of SCRIPT_RANGES) {
+      if (regex.test(char)) {
+        counts.set(name, (counts.get(name) ?? 0) + 1);
+        break;
+      }
+    }
+  }
+
+  if (counts.size === 0) return "Unknown";
+
+  // Return dominant script
+  let maxScript = "Unknown";
+  let maxCount = 0;
+  for (const [script, count] of counts) {
+    if (count > maxCount) {
+      maxScript = script;
+      maxCount = count;
+    }
+  }
+
+  return maxScript;
+}
+
+// Check NIP-32 language tags on an event
+export function getEventLanguageTag(tags: string[][]): string | null {
+  const langTag = tags.find(
+    (t) => t[0] === "l" && t[2] === "ISO-639-1"
+  );
+  return langTag?.[1] ?? null;
+}
+
+export const FILTER_SCRIPTS = [
+  "Latin",
+  "CJK",
+  "Cyrillic",
+  "Arabic",
+  "Devanagari",
+  "Thai",
+  "Korean",
+  "Hebrew",
+  "Greek",
+] as const;