phase-2: extract shared utils

server/calls/MarketCallStore.js

@@ -0,0 +1,80 @@
+import { readFileSync, writeFileSync, existsSync } from 'fs';
+import { randomUUID } from 'crypto';
+
+const STORE_PATH = './market-calls.json';
+
+// MarketCallStore — persists quarterly market thesis entries to market-calls.json.
+//
+// A market call captures:
+//   - A written thesis (the reasoning behind the call)
+//   - Tickers to watch
+//   - A snapshot of each ticker's price + signal at the time of the call
+//   - Performance tracking (current vs snapshot price) computed on read
+//
+// Format:
+// {
+//   "calls": [
+//     {
+//       "id": "uuid",
+//       "title": "Q3 2025 — Rate pivot & tech rotation",
+//       "quarter": "Q3 2025",
+//       "date": "2025-07-01",
+//       "thesis": "The Fed is expected to begin cutting...",
+//       "tickers": ["AAPL", "MSFT", "TLT"],
+//       "snapshot": {
+//         "AAPL": { "price": 195.00, "signal": "✅ Strong Buy", "verdict": "BUY (High Conviction)" }
+//       },
+//       "createdAt": "2025-07-01T14:22:00.000Z"
+//     }
+//   ]
+// }
+
+export class MarketCallStore {
+  _load() {
+    if (!existsSync(STORE_PATH)) return { calls: [] };
+    try {
+      return JSON.parse(readFileSync(STORE_PATH, 'utf8'));
+    } catch {
+      return { calls: [] };
+    }
+  }
+
+  _save(data) {
+    writeFileSync(STORE_PATH, JSON.stringify(data, null, 2), 'utf8');
+  }
+
+  list() {
+    return this._load().calls.sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt));
+  }
+
+  get(id) {
+    return this._load().calls.find((c) => c.id === id) ?? null;
+  }
+
+  // Create a new call. snapshot is an object keyed by ticker with { price, signal, verdict }.
+  create({ title, quarter, date, thesis, tickers, snapshot }) {
+    const data = this._load();
+    const call = {
+      id: randomUUID(),
+      title,
+      quarter,
+      date: date ?? new Date().toISOString().slice(0, 10),
+      thesis,
+      tickers,
+      snapshot: snapshot ?? {},
+      createdAt: new Date().toISOString(),
+    };
+    data.calls.push(call);
+    this._save(data);
+    return call;
+  }
+
+  delete(id) {
+    const data = this._load();
+    const before = data.calls.length;
+    data.calls = data.calls.filter((c) => c.id !== id);
+    if (data.calls.length === before) return false;
+    this._save(data);
+    return true;
+  }
+}