Add snapshot of booking-window rules to train schedules and update related logic

apps/edr-freight-api/src/migrations/1920000000000-AddScheduleWindowRuleSnapshot.ts

@@ -0,0 +1,58 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+/**
+ * Snapshot the booking-window rule onto each train schedule.
+ *
+ * A schedule's window (open time + reopen cycles) must be frozen to the rule it
+ * was created with: a later global-rules edit applies only to FUTURE schedules,
+ * while an already-open schedule keeps its base rule. Previously the batch board
+ * recomputed windows from the LIVE global config, so editing the rule redrew the
+ * board for open schedules (a synthetic grid that no longer matched the window
+ * the customer was shown). These columns give the board a per-schedule rule to
+ * derive its display windows from.
+ *
+ * Existing rows are backfilled from the current global-rules singleton — the best
+ * available base, since they never stored one. Their stamped windowOpensAt/
+ * windowClosesAt are still real, so only projected reopen cycles rely on the
+ * backfill.
+ */
+export class AddScheduleWindowRuleSnapshot1920000000000
+  implements MigrationInterface
+{
+  name = "AddScheduleWindowRuleSnapshot1920000000000";
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.train_schedules
+        ADD COLUMN IF NOT EXISTS rule_window_open_hour integer,
+        ADD COLUMN IF NOT EXISTS rule_window_duration_hours numeric(6, 4),
+        ADD COLUMN IF NOT EXISTS rule_reopen_delay_minutes integer,
+        ADD COLUMN IF NOT EXISTS rule_import_window_lead_days integer,
+        ADD COLUMN IF NOT EXISTS rule_export_booking_lead_hours integer;
+    `);
+
+    // Backfill from the global-rules singleton so pre-existing schedules render.
+    await queryRunner.query(`
+      UPDATE freight.train_schedules ts
+      SET
+        rule_window_open_hour = COALESCE(ts.rule_window_open_hour, r.window_open_hour),
+        rule_window_duration_hours = COALESCE(ts.rule_window_duration_hours, r.window_duration_hours),
+        rule_reopen_delay_minutes = COALESCE(ts.rule_reopen_delay_minutes, r.reopen_delay_minutes),
+        rule_import_window_lead_days = COALESCE(ts.rule_import_window_lead_days, r.import_window_lead_days),
+        rule_export_booking_lead_hours = COALESCE(ts.rule_export_booking_lead_hours, r.export_booking_lead_hours)
+      FROM freight.train_scheduling_global_rules r
+      WHERE ts.rule_window_open_hour IS NULL;
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.train_schedules
+        DROP COLUMN IF EXISTS rule_window_open_hour,
+        DROP COLUMN IF EXISTS rule_window_duration_hours,
+        DROP COLUMN IF EXISTS rule_reopen_delay_minutes,
+        DROP COLUMN IF EXISTS rule_import_window_lead_days,
+        DROP COLUMN IF EXISTS rule_export_booking_lead_hours;
+    `);
+  }
+}