Implement BAT-011 transactional write service split

jarca_ledger_mcp/application/budgets_write_services.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from .shared import *
+
+
+def create_ledger_budget(month: str, category: str, amount: int | float, subcategory: str = "", person: str = "", currency: str = "KRW", memo: str = "", db_path: str | None = None) -> dict[str, Any]:
+    try:
+        month_norm = normalize_month(month); amount_int = int(amount)
+    except Exception as e:
+        return fail("validation_error", str(e))
+    if not category:
+        return fail("validation_error", "category is required")
+    if amount_int < 0:
+        return fail("validation_error", "amount must be non-negative")
+    ts = now_iso(); budget_id = new_id("bud")
+    with db(db_path) as conn:
+        conn.execute("""INSERT INTO budgets(id,month,category,subcategory,person,amount,currency,memo,created_at,updated_at)
+                      VALUES(?,?,?,?,?,?,?,?,?,?)
+                      ON CONFLICT(month,category,subcategory,person) DO UPDATE SET amount=excluded.amount,currency=excluded.currency,memo=excluded.memo,updated_at=excluded.updated_at""", (budget_id, month_norm, category, subcategory, person, amount_int, currency, memo, ts, ts))
+        row = conn.execute("SELECT * FROM budgets WHERE month=? AND category=? AND subcategory=? AND person=?", (month_norm, category, subcategory, person)).fetchone()
+    return ok(budget=row_to_dict(row))