Expose full Truthtrance battle-plan and shipment editors

game/shipment-expression-input.ts

@@ -0,0 +1,36 @@
+import {
+  parseShipmentExpression,
+  ShipmentClaimError,
+  type ShipmentExpression,
+} from './shipment-promises';
+
+/** Shipment limits count leaves, rather than counting the containing groups. */
+export function shipmentExpressionInputSize(value: ShipmentExpression): { leaves: number; depth: number } {
+  if (!('op' in value)) return { leaves: 1, depth: 0 };
+  const children = value.terms.map(shipmentExpressionInputSize);
+  return {
+    leaves: children.reduce((sum, child) => sum + child.leaves, 0),
+    depth: 1 + Math.max(0, ...children.map(child => child.depth)),
+  };
+}
+
+/** Use the existing parser's structure and bounds while unfinished leaf fields
+ * remain editable. Frozen current facts are never valid pure-shipment input. */
+export function shipmentExpressionInputError(value: ShipmentExpression): string | null {
+  const structure = (node: unknown): unknown => {
+    if (!node || typeof node !== 'object' || Array.isArray(node)) return node;
+    if ('op' in node) return {
+      ...node,
+      ...('terms' in node && Array.isArray(node.terms) ? { terms: node.terms.map(structure) } : {}),
+    };
+    if ('constant' in node) return node;
+    return { ...node, territory: 'arrakeen', minimum: 1 };
+  };
+  try {
+    parseShipmentExpression(structure(value), { allowConstants: false });
+    return null;
+  } catch (error) {
+    if (error instanceof ShipmentClaimError) return error.message;
+    throw error;
+  }
+}