Squash Odysseus development history

static/js/documentStats.js

@@ -0,0 +1,55 @@
+// Unicode-aware text statistics shared by source and rich-text documents.
+
+let _wordSegmenter;
+let _graphemeSegmenter;
+
+function _segmenter(granularity) {
+  if (typeof Intl === 'undefined' || typeof Intl.Segmenter !== 'function') return null;
+  try {
+    if (granularity === 'word') {
+      _wordSegmenter ||= new Intl.Segmenter(undefined, { granularity: 'word' });
+      return _wordSegmenter;
+    }
+    _graphemeSegmenter ||= new Intl.Segmenter(undefined, { granularity: 'grapheme' });
+    return _graphemeSegmenter;
+  } catch (_) {
+    return null;
+  }
+}
+
+export function countDocumentWords(value) {
+  const text = String(value ?? '');
+  if (!text.trim()) return 0;
+  const segmenter = _segmenter('word');
+  if (segmenter) {
+    let count = 0;
+    for (const segment of segmenter.segment(text)) {
+      if (segment.isWordLike) count += 1;
+    }
+    return count;
+  }
+  return (text.match(/[\p{L}\p{N}\p{M}]+(?:['’][\p{L}\p{N}\p{M}]+)*/gu) || []).length;
+}
+
+export function countDocumentCharacters(value) {
+  const text = String(value ?? '');
+  const segmenter = _segmenter('grapheme');
+  if (segmenter) return Array.from(segmenter.segment(text)).length;
+  return Array.from(text).length;
+}
+
+export function getDocumentStats(value) {
+  const text = String(value ?? '').replace(/\r\n?/g, '\n');
+  const words = countDocumentWords(text);
+  const characters = countDocumentCharacters(text);
+  const charactersNoSpaces = countDocumentCharacters(text.replace(/\s/gu, ''));
+  const lineText = text.replace(/\n+$/u, '');
+  const lines = lineText ? lineText.split('\n').length : 0;
+  return {
+    words,
+    characters,
+    charactersNoSpaces,
+    lines,
+    readingMinutes: words ? Math.max(1, Math.ceil(words / 225)) : 0,
+  };
+}