Initial commit: Memind H5 portal with MindSpace, Plaza, and agent jobs.

Track application source and tests; exclude local env, user workspaces, and runtime data via .gitignore.

Co-authored-by: Cursor <cursoragent@cursor.com>

plaza-algorithm.mjs

@@ -0,0 +1,89 @@
+const DEFAULT_CONFIG = {
+  w_view: 0.1,
+  w_like: 3.0,
+  w_comment: 5.0,
+  w_collect: 4.0,
+  decay_base: 2.0,
+  decay_exp: 1.5,
+};
+
+export function computeHotScore(stats, config = DEFAULT_CONFIG, nowMs = Date.now()) {
+  const publishedAt = Number(stats.published_at ?? stats.publishedAt ?? nowMs);
+  const ageHours = Math.max(0, (nowMs - publishedAt) / 3_600_000);
+  const numerator =
+    Number(stats.view_count ?? 0) * config.w_view +
+    Number(stats.like_count ?? 0) * config.w_like +
+    Number(stats.comment_count ?? 0) * config.w_comment +
+    Number(stats.collect_count ?? 0) * config.w_collect;
+  const denominator = Math.pow(ageHours + config.decay_base, config.decay_exp);
+  if (denominator <= 0) return 0;
+  return Math.max(0, numerator / denominator);
+}
+
+export async function loadAlgorithmConfig(pool) {
+  const [rows] = await pool.query(`SELECT \`key\`, value FROM plaza_algorithm_config`);
+  const config = { ...DEFAULT_CONFIG };
+  for (const row of rows) {
+    if (row.key in config) config[row.key] = Number(row.value);
+  }
+  return config;
+}
+
+export async function ensureAlgorithmConfig(pool) {
+  const [rows] = await pool.query(`SELECT COUNT(*) AS count FROM plaza_algorithm_config`);
+  if (Number(rows[0]?.count ?? 0) > 0) return;
+  const now = Date.now();
+  const seeds = [
+    ['w_view', 0.1, '浏览量权重'],
+    ['w_like', 3.0, '点赞权重'],
+    ['w_comment', 5.0, '评论权重'],
+    ['w_collect', 4.0, '收藏权重'],
+    ['decay_base', 2.0, '时间衰减基数'],
+    ['decay_exp', 1.5, '时间衰减指数'],
+  ];
+  for (const [key, value, description] of seeds) {
+    await pool.query(
+      `INSERT INTO plaza_algorithm_config (\`key\`, value, description, updated_at)
+       VALUES (?, ?, ?, ?)`,
+      [key, value, description, now],
+    );
+  }
+}
+
+export async function recalculateHotScores(pool, { windowHours = 48 } = {}) {
+  await ensureAlgorithmConfig(pool);
+  const config = await loadAlgorithmConfig(pool);
+  const now = Date.now();
+  const windowStart = now - windowHours * 3_600_000;
+  const [rows] = await pool.query(
+    `SELECT id, view_count, like_count, comment_count, collect_count, published_at
+     FROM plaza_posts
+     WHERE status = 'published' AND published_at >= ?`,
+    [windowStart],
+  );
+  if (rows.length === 0) return { updated: 0 };
+
+  const conn = await pool.getConnection();
+  try {
+    await conn.beginTransaction();
+    for (const row of rows) {
+      const hotScore = computeHotScore(row, config, now);
+      await conn.query(
+        `UPDATE plaza_posts SET hot_score = ?, hot_updated_at = ?, updated_at = ? WHERE id = ?`,
+        [hotScore, now, now, row.id],
+      );
+    }
+    await conn.commit();
+  } catch (error) {
+    await conn.rollback();
+    throw error;
+  } finally {
+    conn.release();
+  }
+  return { updated: rows.length };
+}
+
+export const algorithmInternals = {
+  DEFAULT_CONFIG,
+  computeHotScore,
+};